OL Series 426 Low Light Level lntegrating Sphere Calibration Standards

OL Series 426 Low Light Level lntegrating Sphere Calibration Standards GENERAL The OL Series 426 Low-Light-Level Calibration Standard is designed for accurately calibrating very sensitive microphotometers, image intensifiers, telephotometers, and imaging spectroradiometers for photometric or spectroradiometric response at moderate to extremely low light levels. It serves as a highly accurate, large area, uniform, diffusely radiating source with a near normal luminance that can be varied over nearly 6 decades with essentially constant color temperature. The OL Series 426 consists of an Optics Head and a separate electronic display console/power supply (OL 400-C Controller). This enables remote location of either unit, which facilitates alignment or positioning of the source with respect to the device to be calibrated. The source module/optics head is designed such that it can be configured with integrating spheres having diameters of 4, 6, 8, 12 and 18 inches with exit (radiating) ports of 1, 1½, 2, 3 and 6 inches, respectively. OPTICS HEAD The OL 426 is based on a dual integrating sphere design, with the arrangement of these spheres in series. The exit port of the first sphere, or primary sphere, produces a uniform beam into the entrance port of the secondary sphere. A baffle tube connects the exit port of the primary sphere to the entrance port of the secondary sphere, and an aperture in the baffle tube determines how much light is allowed into the secondary sphere, thus the maximum luminance at the radiating port can range over several decades depending on the size of the aperture installed. The aperture is not used to determine the true luminance at the exit port of the secondary sphere but merely scale it by the desired amount. A precision silicon detector-filter combination with an accurate photopic response mounted in the wall of the primary sphere tracks the luminance in the primary sphere at higher levels for accuracy purposes, and the luminance display is scaled to indicate the actual luminance at the exit port of the secondary sphere. The actual luminance of the exit port is calibrated via measurements, and then the monitor detector gain is scaled appropriately. The in-line sphere port concept with an intermediate spider baffle provides exceptional uniformity in the near normal luminance across the radiating port. A shutter is located between the lamp and the entrance port of the primary sphere. The luminance/ radiance output can be switched between zero and any desired level without adjustment or lamp changes. An optional filter holder, mounted at the exit port, accommodates alignment targets, filters, de-coupling diffusers etc. for specific user requirements. Spectral shaping filters can be utilized to simulate various sources such as Illuminate A, B, C, D65, etc. In addition to luminance and color temperature, the OL Series 426 can be obtained with calibrations for spectral radiance over the 350 to 1100 nm wavelength range. CONTROLLER The microprocessor-based OL 400-C Controller performs all system interface and monitoring functions. An automatic ramp up/down function eliminates potentially dangerous current surges to the lamp. Luminance, color temperature, and lamp current are displayed on a 2 line by 20 character alphanumeric LED display, which may be turned off for low-light level conditions. An 8-key keypad and main power switch are located on the front panel for easy access to all system functions. Luminance is displayed with 4 ½ digits plus exponent in units specified by the user. As an option, the display can be factory programmed to read in virtually any pertinent units the user desires. DC current supplied to the lamp has a 0.001 ampere resolution with a 0.02% uncertainty. The controller computes the color temperature of the source over the range of 2000 3000K. Software for remote operation of the source is provided, allowing control of lamp on/off functions and setting the lamp current (color temperature) as well as readout of the photometer in any preprogrammed optical unit. An optional software development kit is available for custom programming. Bulletin 136 / Rev 7-11 Page 1 of 2

OL Series 426 Low Light Level Integrating Sphere Calibration Standards OL 426-OH OPTICS HEAD Luminance Uncertainty (k=2)... ± 2% (2300 K to 2900 K (± 50K)) 2 ± 2.0% to ± 3.5% (2000 K to 2300 K) Spectral Radiance Calibration optional (relative to NIST)... ± 2% to ± 3%, 350 1100 nm Correlated Color Temperature Range... 2000 to 2950 K (± 50 K) Correlated Color Temperature Uncertainty (k=2)... Less than ± 25 K Luminance Stability @ 2856 K Short Term... ± 0.5% (after 15 minutes warm-up) Long Term... ± 2% 100 hours of use or 1 year Spectral Radiance Uncertainty @ 550 nm... ± 2% relative to NIST Sphere Coating (reflectance)... > 99% (350 to 1100 nm) Variable Aperture... Micrometer-controlled Shutter... Open/ Closed OL 400-C CONTROLLER Current Source Luminance Display Range... 6.600 A Resolution... 0.001 A Accuracy... 0.02% of full-scale Stability... 10 ppm after warm-up Line Voltage Sensitivity... < 2 ppm/ V Temperature Sensitivity... < 25 ppm / C Photometer Ranges... 2E-10 to 2E-3 A Resolution... 4½ digits (0.0001 E-x A) Accuracy E-3 to E-7 ranges... 0.05% ± 1 digit E-8 to E-9 ranges... 0.10% ± 1 digit E-10 ranges... 0.50% ± 2 digit Range Selector... auto, manual, or software-selectable Response Time... 0.1 to 10 seconds Physical Size... 12.0 in D x 9.38 in W x 5.38 in H (30.48 cm x 23.83 cm x 13.67 cm) Weight... 17.0 pounds (7.7 kg) Power Input... 100/115/230 VAC, 3.2/3.2/2 A, 50/60 Hz Operating Temperature Range... 15 to 35 C Operating Humidity Range... 10% to 85% (non-condensing) Model Number Sphere Exit Port LUMINANCE LEVELS (nominal) Uniformity Maximum Luminance @ 2856 K @ 3000 K Display Resolution OL 426-4 4 1 ±1.0% 80 fl 130 fl 1 E-7 fl OL 426-6 6 1½ ±1.0% 40 fl 70 fl 1 E-7 fl OL 426-8 8 2 ±1.0% 29 fl 40 fl 1 E-7 fl OL 426-12 12 3 ±1.0% 14 fl 23 fl 1 E-7 fl OL 426-18 18 6 ±2.0% 4 fl 7 fl 1 E-7 fl Other configurations available upon request. OL SERIES 426 SPECIFICATIONS CALIBRATION OPTIONS OL 426-X-... luminance, color temperature OL 426-X-1... luminance, color temperature, 1/ spectral radiance (350 to 1100 nm) OL 426-X-U... uncalibrated * Note: "X" designates the diameter of the integrating sphere. 1/ Spectral radiance measured at a color temperature of ~3000K unless otherwise specified. Bulletin 136 / Rev 7-11 Page 2 of 2

OL 440-8-OH Variable Ultraviolet Integrating Sphere Calibration Standard The OL 440-8-OH Variable Ultraviolet Integrating Sphere Calibration Standard is large area, uniform, diffusely radiating source with a near normal integrated radiance that can be varied over several decades. The OL 440-8-OH consists of a forced air cooled source housing incorporating a deuterium lamp that is coupled to an 8-inch diameter integrating sphere coated with pressed PTFE. A micrometer-controlled aperture between the lamp and the 1-inch diameter input port of the integrating sphere allows continuous adjustment of the sphere intensity over the full useful range. The in-line sphere port concept with an intermediate spider baffle provides for uniformity across the radiating aperture. A precision UV-enhanced silicon detector is mounted in the sphere wall and monitors the source intensity. An external radiometer, such as the OL 730C Programmable Radiometer/Photometer or equivalent, is utilized for readout of the integrated source radiance by measurement of the monitor detector current. A shutter, located between the lamp and the entrance port of the integrating sphere, allows zeroing out the monitor detector without removing power to the lamp. The location of the shutter also ensures that any stray light (room light) entering the exit (radiating) port of the sphere is properly accounted for when zeroing the monitor detector. The sphere s exit (radiating) port has a 2.0-inch (50.8-mm) diameter aperture opening. The OL 440-8-OH is provided with a spectral radiance calibration over the 200 nm to 400 nm region. The source is also available without calibration. OL 440-8-OH Variable Ultraviolet Integrating Sphere Calibration Standard top view Bulletin 79 / Rev 7-11 Page 1 of 2

OL 440-8-OH Variable Ultraviolet Integrating Sphere Calibration Standard OL 440-8-OH Optics Head Specifications Lamp Type Deuterium...(30-watt) Operating Current... 300 milliamperes DC Spectral Radiance Uncertainty (relative to NIST, k=2)... ± 3% to 10% (350 400 nm) ± 20% (200 240 nm) Output Uniformity... ± 5% (1 inch dia) 1 ± 15% (full port) 1 Monitor Stability... ± 1% (after 30 minutes warm-up) Sphere Coating (reflectance)... 73 99% (200 400 nm) Sphere Monitor (built-in)... UV-Enhanced Silicon Detector Starting Voltage... 350 VDC (min.) Anode Voltage... 80 V ± 10% Filament Starting Voltage... 10 VDC (1.2 A) Filament Operating Voltage... 7 VDC (1.0 A) Filament Prestart Warm-up Time... 17 seconds Optional Accessories... OL 46D Deuterium Lamp Power Supply 2 1/ Uniformity values are relative to the deviation from the average value of the points measured over the diameter specified. 2 / Requires modification of the OL 46D Power Supply to include an additional connector on the rear panel that supplies power to the 12 VDC fan in the OL 440-8-0H. OL 440-8-OH Variable Ultraviolet Integrating Sphere Calibration Standard side view Bulletin 79 / Rev 7-11 Page 2 of 2

OL Series 454 Integrating Sphere Source The variable aperture can be used to attenuate the output of the sphere source over a range of up to six decades. General The OL Series 454 Integrating Sphere Source is designed to produce a high intensity Lambertian distribution. It is useful as a highly uniform illumination source for contrast measurements, linearity tests, flat-fielding of devices for response uniformity, and device MTF with the optional filter holder and the desired resolution target. It consists of an OL Series 454 Optics Head and a separate OL 410-150 Precision Lamp Source. The source is also available with a color temperature calibration over the 2000 3000K range. The source module/optics head is designed such that it can be configured with integrating spheres having diameters of 4, 6, 8, 12 and 18 inches with exit (radiating) ports of 1, 1½, 2, 3 and 6 inches, respectively. Source Module/Optics Head The Source Module/Optics Head uses a 150-W tungsten-halogen reflectorized lamp with a micrometer-controlled variable aperture between the lamp and the integrating sphere. The sphere has a highly reflective, diffuse reflecting PTFE based coating. The in-line sphere port geometry, with an intermediate spider baffle in the middle of the sphere, provides for exceptional uniformity in the near normal luminance over the entire radiating port of the sphere. A shutter is located between the lamp and the entrance port of the sphere. An optional filter holder, mounted at the exit port, accommodates alignment targets, filters, de-coupling diffusers etc. for specific user requirements. Spectral shaping filters can be utilized to simulate various sources such as illuminates A, B, C, D65, etc. Controller The OL 410-150 is a highly regulated constant current DC power supply that optimizes source stability and accuracy. The lamp current is displayed to 4 digits on the digital display and can be adjusted. The uncertainty in the current setting is ± 0.02%. In order to enhance the stability and life of the lamp, a current ramp up/ramp down circuit is employed which prevents thermal shock to the lamp. Lamp usage hours are recorded internally and can be viewed in the digital display to accurately monitor the calibration life of the source. In addition, an automatic shut down circuit is employed that turns off the unit in case of excessive current due to system malfunction or accidental setting of too high a lamp current by the user. Bulletin 137 / Rev 9-11 Page 1 of 2

OL Series 454 Integrating Sphere Source OL 454-OH OPTICS HEAD Correlated Color Temperature Range... 2000 to 3000 K Correlated Color Temperature Uncertainty... ± 25 K Luminance Stability @ 2856 K Short Term... ± 1.0% (after 15 minute warm-up) Long Term... ± 3% 50 hours/ 1 year Sphere Coating (reflectance)... > 99% (350 to 1100 nm) Shutter... Open/ Closed OL 410-150 CONTROLLER Current Display (4 digits)... Amperes Current Adjustment Range... 0 to 6.5 amperes DC Current Accuracy (amps DC)... ± 0.02% (4 digits) Current Regulation (amps DC)... ± 0.01% for 10% line variation Lamp Power Cycle... controlled ramp function Current Temperature Regulation... ± 0.025% / 10 C Operating Temperature Range...15 to 35 C Operating Humidity Range... 10% to 85% (non-condensing) Elapsed Time Meter... 0 to 9999.99 hours Power (user selectable)... 100/115/230 VAC ± 10%, 50/60 Hz Model Number Sphere LUMINANCE LEVELS (nominal) Exit Port Uniformity @ 2856 K Maximum Luminance @ 3000 K OL 454-4 4 1 ± 1.0% 22000 fl 35000 fl OL 454-6 6 1½ ± 1.0% 12000 fl 20000 fl OL 454-8 8 2 ± 1.0% 9000 fl 13000 fl OL 454-12 12 3 ± 1.0% 4000 fl 6400 fl OL 454-18 18 6 ± 2.0% 700 fl 1100 fl Other configurations available upon request. OL SERIES 454 SPECIFICATIONS CALIBRATION OPTIONS OL 454-X-K... color temperature (2000-3000K) OL 454-X-U... uncalibrated * Note: "X" designates the diameter of the integrating sphere. Bulletin 137 / Rev 9-11 Page 2 of 2

OL Series 455 Integrating Sphere Calibration Standard GENERAL The OL Series 455 Integrating Sphere Calibration Standard is designed for accurately calibrating microphotometers, image intensifiers, telephotometers and imaging spectroradiometers for photometric, radiometric, or spectroradiometric response. It serves as a highly accurate, large area, uniform, diffusely radiating source with a near normal luminance that can be varied over 6 decades with essentially constant color temperature. The OL Series 455 consists of an optics head and a separate electronic display console/ power supply (OL 400- C Controller). This enables remote location of either unit, which facilitates alignment or positioning of the source with respect to the device to be calibrated. The source module/ optics head is designed such that it can be configured with integrating spheres having diameters of 4, 6, 8, 12 and 18 inches with exit (radiating) ports of 1, 1½, 2, 3 and 6 inches, respectively. OPTICS HEAD The optics head has a 150-W tungsten-halogen reflectorized lamp with a micrometer-controlled variable aperture between the lamp and the entrance port of the integrating sphere. This combination provides for continuous adjustment of the sphere luminance over a range of more than 10 6. A precision silicon detector-filter combination with an accurate photopic response is mounted in the sphere wall and monitors the sphere luminance. The in-line sphere port concept with an intermediate spider baffle provides exceptional high luminance levels while maintaining high uniformity in the near normal luminance across the radiating aperture. A shutter is located between the lamp and the entrance port of the integrating sphere. The location of the shutter ensures that any stray light (room light) entering the radiating port of the sphere is properly accounted for when auto-zeroing the photometer. In addition, the source output can easily be set to zero by use of the shutter without any changes to the sphere luminance setting. An optional filter holder, mounted at the exit port, accommodates alignment targets, filters, de-coupling diffusers etc. for specific user requirements. Spectral shaping filters can be utilized to simulate various sources such as Illuminant A, B, C, D65, etc. In addition to luminance and color temperature, the OL Series 455 can be obtained with calibrations for spectral radiance over all or part of the entire 350 to 2500 nm wavelength range. CONTROLLER The microprocessor-based OL 400-C Controller performs all system interface and monitoring functions. An automatic ramp up/ down function eliminates potentially dangerous current surges to the lamp. Luminance, color temperature, and lamp current are displayed on a 2 line by 20 character alphanumeric LED display, which may be turned off for lowlight level conditions. An 8 key keypad and main power switch are located on the front panel for easy access to all system functions. Luminance is displayed with 4 ½ digits plus exponent in units specified by the user. As an option, the display can be factory programmed to read in virtually any pertinent units the user desires. DC current supplied to the lamp has a 0.001 ampere resolution with a 0.02% uncertainty. The controller computes the color temperature of the source over the range of 2000 3000K. Software for remote operation of the source including on/off and lamp current setting functions, as well as the photometer read-out units via full speed USB 2.0 interface, is included. An optional software development kit is available for custom programming. OL 455-6-1-NVG In order to help you ensure compliance with Appendix 30 of MIL-L-85762A and MIL-STD-3009 requirements we offer the NVG version of the OL 455-6 for calibration of your NVIS compliance spectroradiometer. The NVG version of the OL 455 is calibrated at 100 fl/2856k for spectral radiance whereas the non-nvg version is calibrated at 90% max/ 3000K for spectral radiance. The luminance cal for both is done at 2856K, but the NVG is done at 100 fl and the non-nvg is done at 90% max. Bulletin 108 / Rev 7-11 Page 1 of 2

OL Series 455 Integrating Sphere Calibration Standard OL 455-OH OPTICS HEAD Luminance Uncertainty (@ 2856 K, 90% max. luminance)... ± 0.5% relative to NIST Color Temperature Range... 2000 to 3000 K Color Temperature Uncertainty... ± 25 K Luminance Stability @ 2856 K Short Term... ± 0.5% Long Term... ± 2% 100 hours/ 1 year Spectral Radiance Uncertainty @ 550 nm... ± 2% relative to NIST Sphere Coating (reflectance)... > 99% (350 to 1100 nm) Variable Aperture... micrometer controlled Shutter... open/ closed OL 400-C CONTROLLER Luminance Display (4½ digits)... fl or cd/m 2 Luminance Display Range... 0.0001 to 50,000 fl (auto-ranging, manual, or software selectable) Lamp Current Display... 4 digits Range... 0 to 6.600 amperes DC Power Cycle... 60 second ramp function Accuracy... ± 0.02% of full scale Regulation... < 2ppm/ V Temperature Regulation... <25 ppm/ C Lamp Timer... 0 - >1000 hours Operating Temperature Range... 15 to 35 C Operating Humidity Range... 10% to 85% (non-condensing) Power (user selectable)... 100/ 115/ 230 VAC, 50/60 Hz Remote Interface... Full-speed USB and TTL-I/O Size... 12.0 x 9.38 x 5.38 Weight... 17.0 lbs. Model Number Sphere Exit Port LUMINANCE LEVELS (nominal) Uniformity Maximum Luminance @ 2856 K @ 3000 K Display Resolution OL 455-4 4" 1" ± 1.0% 22,000 fl 35,000 fl 0.0001 fl OL 455-6 6" 1½" ± 1.0% 12,000 fl 20,000 fl 0.0001 fl OL 455-8 8" 2" ± 1.0% 9,000 fl 13,000 fl 0.0001 fl OL 455-12 12" 3" ± 1.0% 4,000 fl 6,400 fl 0.0001 fl OL 455-18 18" 6" ± 2.0% 700 fl 1,100 fl 0.0001 fl Other configurations available upon request. CALIBRATION OPTIONS OL 455-X... luminance, color temperature OL 455-X-1... luminance, color temperature, 1/ spectral radiance (350 to 1100 nm) OL 455-X-2... luminance, color temperature, 1/ spectral radiance (350 to 2500 nm) OL 455-X-U... uncalibrated Note: "X" designates the diameter of the integrating sphere. 1/ Spectral radiance measured at a color temperature of ~3000 K unless otherwise specified. Bulletin 108 / Rev 7-11 Page 2 of 2

OL 457 LED Integrating Sphere Calibration Standard The OL 457 LED Integrating Sphere Calibration Standard is a cost-effective, wavelength-selectable, nearly monochromatic NIST-traceable radiant light source. It provides more flexibility and higher performance than filtered sources and is a significantly lower cost alternative to monochromators. Typical applications include anywhere a stable or calibrated source is required, e.g. MTF, radiance and irradiance sensitivity of detectors, arrays and cameras, linearity testing, dynamic range testing, signal-to-noise testing etc. Interchangeable LED sources offer more versatility, affording users with an unprecedented level of uniformity and accurate continuously variable intensity over many decades. The interchangeable LED modules are easily installed and removed from the optics head without affecting calibration accuracy. These fully integrated source and heat sink assemblies offer long life and high thermal efficiency for increased stability and output. The OL 457 consists of an optics head and a separate precision constant current source (OL 401-C Controller). This enables remote location of either unit, which facilitates alignment or positioning of the source with respect to the device to be calibrated. The source module/ optics head is designed such that it can be configured with integrating spheres having diameters of 4, 6, 8, 12, and 18 inches. The OL 401-C Calibration Standard Controller automatically recognizes installed LED modules and provides the appropriate precision current to the LEDs, readout of LED current, amplification of the detector signal, and readout of the radiance. OL 457-X LED Modules Peak Nominal Max. Output * Min. Output wavelength HBW (nm) (nm) W/(sr m 2 ) Cd/m 2 W/(sr m 2 ) Cd/m 2 LED-375 (UVA) 375 ± 5 10 ± 5 8 N/A 0.001 N/A LED-405 (Violet) 405 ± 6 16 ± 6 140 200 0.001 0.0014 LED-465 (Blue) 465 ± 10 23 ± 4 120 4,810 0.001 0.0406 LED-520 (Green) 520 ± 10 36 ± 8 49 20,390 0.001 0.4121 LED-595 (Amber) 595 ± 5 15 ± 5 18 8,720 0.001 0.4790 LED-630 (Red) 630 ± 10 16 ± 6 49 8,860 0.001 0.1805 LED-870 (NIR) 870 ± 20 50 ± 10 43 N/A 0.001 N/A *For 6 inch sphere (OL 457-6 source). Use the multipliers in the table below to calculate max. output for other sphere sizes OL 457-4 1.8 OL 457-6 1.0 OL 457-8 0.7 OL 457-12 0.3 OL 457-18 0.06 Bulletin 120 / Rev 1-08 Page 1 of 2

OL 457 LED Integrating Sphere Calibration Standard All LED modules are calibrated with the sphere in W/(sr m2) unless otherwise requested OL 457-OH OPTICS HEAD Radiance Uncertainty... ± 2% relative to NIST Source Stability Short Term... ± 0.5% Long Term... ± 2% 100 hours/ 1 year Sphere Coating (reflectance).... 99% (350 to 1100 nm) Variable Aperture... micrometer-controlled Shutter... open/ closed OL 401-C Controller Radiance Display (4½ digits)... W/(sr m 2 ) Radiance Display Range... 0.0001 to 50,000 W/(sr m 2 ) (auto-ranging, manual, or software selectable) Lamp Current Display... 4 digits Range... 0 to 3.3 amperes DC Power Cycle... 60 sec ramp function Accuracy... ± 0.02% of full scale Regulation... 2ppm/V Temperature Regulation... 25ppm/ C Lamp Timer... 0 - >1000 hours Operating Temperature Range... 15 to 35 C Operating Humidity range... 10% to 85% (non-condensing) Power (user selectable)... 120/240 VAC Remote Interface... Full-speed USB and TTL-I/O Size... 12.0 x 9.38 x 5.38 Weight... 17.0 pounds Bulletin 120 / Rev 1-08 Page 2 of 2

OL Series 462 Automated Integrating Sphere Calibration Standard GENERAL The OL Series 462 Automated Integrating Sphere Calibration Standard is designed for accurately calibrating instruments such as microphotometers, telephotometers, image intensifiers, and imaging spectroradiometers for photometric, radiometric, or spectroradiometric response. It serves as a highly accurate, large area, uniform, diffusely radiating source with a near normal luminance that can be varied over six decades with essentially constant color temperature. The OL Series 462 consists of an optics head and a separate microprocessor controlled luminance display/ lamp power supply/motor controller console (OL 462-C Controller). This enables remote location of either unit, which facilitates alignment or positioning of the source with respect to the device to be calibrated. The source module/ optics head is designed such that it can be configured with integrating spheres having diameters of 4, 6, 8, 12, and 18 inches with exit (radiating) ports of 1, 1½, 2, 3, and 6 inches, respectively. OPTICS HEAD The optics head has a 150-W tungsten-halogen, reflectorized lamp with a motorized, computer-controlled variable aperture between the lamp and the entrance port of the integrating sphere. This combination provides for continuous adjustment of the sphere luminance over a range of more than 10 6. A precision silicon detector/ filter combination with an accurate photopic response is mounted in the sphere wall and monitors the sphere luminance. The in-line sphere port concept with an intermediate spider baffle provides exceptional high luminance levels while maintaining high uniformity in the near normal luminance across the radiating aperture. A motorized, computer-controlled shutter is located between the lamp and the entrance port of the integrating sphere. The luminance/ radiance output can be switched between zero and any desired level without adjustment or lamp changes. An optional filter holder, mounted at the exit port, accommodates alignment targets, filters, de-coupling diffusers etc. for specific user requirements. Spectral shaping filters can be utilized to simulate various sources such as illuminates A, B, C, D65, etc. In addition to luminance and color temperature, the OL Series 462 can be obtained with calibrations for spectral radiance over all or part of the 350 to 2500 nm wavelength range. CONTROLLER The microprocessor-based OL 462 Controller performs all the system interface and monitoring functions. An automatic ramp up/ down function eliminates potentially dangerous current surges to the lamp. Luminance, color temperature, lamp current, and operational prompts are displayed on a two line by 20 character alphanumeric vacuum-fluorescent display. A 20 key keypad, rotary encoder knob, and main system power switch are also located on the front panel for easy access to all system functions. Luminance is displayed with five digit resolution in units specified by the user. As an option, the display can be factory programmed to read in virtually any pertinent units the user desires. DC current supplied to the lamp has a 0.001 ampere resolution with a 0.05% uncertainty. The controller computes the color temperature of the source and displays lamp current or color temperature over the range of 2000 to 3000K. The luminance, color temperature, and lamp current can also be set by an external computer via the standard RS-232C interface. RS-422 and GPIB (IEEE-488) interfaces are also available. An internal microprocessor controlled elapsed time meter enables the user to keep track of the number of hours the lamp has been in operation. Bulletin 119 / Rev 7-11 Page 1 of 2

OL Series 462 Automated Integrating Sphere Calibration Standard OL 462-OH OPTICS HEAD Luminance Uncertainty (@ 2856K, 90% max luminance)... ± 0.5% relative to NIST Color Temperature Range... 2000 to 3000 K Color Temperature Uncertainty... ±25 K Source Stability @ 2856 K Short Term... ± 0.5% Long Term... ± 2% 100 hours/1 year Spectral Radiance Uncertainty @ 550 nm... ± 2% relative to NIST Sphere Coating (reflectance)...> 99% (350 to 1100 nm) Variable Aperture... Automated Micrometer(Motorized) Shutter... Automated (Open/Closed) OL 462-C CONTROLLER Luminance Display (5 digits)... fl or cd/m 2 * Luminance Display Range... 0.0001 to 50,000 fl (Auto-ranging) Lamp Current Display... 4 digits Range... 0 to 6.500 amperes DC Power Cycle... 60 second ramp function Accuracy... ± 0.05% @ 6.500 amperes Regulation... ± 0.01% for 10% line variation Temperature Regulation... ± 0.025%/10 C Lamp Timer... 0 to 1000 hours Operating Temperature Range... 15 to 35 C Operating Humidity Range... 10% to 85% (noncondensing) Power (user selectable)... 115 or 230 VAC ± 10%, 50/60 Hz Size... 18 x 18 x 5¼ Weight... 39 lbs. * Luminance can be displayed in other units. LUMINANCE LEVELS (nominal) Model Number Sphere Exit Port Uniformity Maximum Luminance @ 2856 K @ 3000 K Display Resolution OL 462-4 4 1 ±1.0% 22,000 fl 35.000 fl 0.0001 fl OL 462-6 6 1½ ±1.0% 12,000 fl 20,000 fl 0.0001 fl OL 462-8 8 2 ±1.0% 9,000 fl 13,000 fl 0.0001 fl OL 462-12 12 3 ±1.0% 4,000 fl 6,400 fl 0.0001 fl OL 462-18 18 6 ±2.0% 700 fl 1,100 fl 0.0001 fl Other configurations available upon request. CALIBRATION OPTIONS OL 462-X... luminance, color temperature OL 462-X-1... luminance, color temperature, 1/ spectral radiance (350 to 1100 nm) OL 462-X-2... luminance, color temperature, 1/ spectral radiance (350 to 2500 nm) OL 462-X-U... uncalibrated Note: "X" designates the diameter of the integrating sphere. 1/ Spectral radiance measured at a color temperature of ~3000K unless otherwise specified. Bulletin 119 / Rev 7-11 Page 2 of 2

OL Series 466 Automated Low Light Level Integrating Sphere Calibration Standard GENERAL The OL Series 466 Automated Low-Light-Level Integrating Sphere Calibration Standard is designed for accurately calibrating very sensitive instruments such as microphotometers, telephotometers, image intensifiers, and imaging spectroradiometers for photometric, radiometric, or spectroradiometric response at moderate to extremely low light levels. It serves as a highly accurate, large area, uniform, diffusely radiating source with a near normal luminance that can be varied over decades with essentially constant color temperature. The OL Series 466 consists of an optics head and a separate microprocessor controlled luminance display/lamp power supply/motor controller console (OL 462-C Controller). This enables remote location of either unit, which facilitates alignment or positioning of the source with respect to the device to be calibrated. The source module/optics head is designed such that it can be configured with integrating spheres having diameters of 4, 6, 8, 12 and 18 inches with exit (radiating) ports of 1, 1½, 2, 3 and 6 inches, respectively. OPTICS HEAD The OL 466 is based on a dual integrating sphere design, with the arrangement of these spheres in series. The exit port of the first sphere, or primary sphere, produces a uniform beam into the entrance port of the secondary sphere. A baffle tube connects the exit port of the primary sphere to the entrance port of the secondary sphere, and an aperture in the baffle tube determines how much light is allowed into the secondary sphere, thus the maximum luminance at the radiating port can range over several decades depending on the size of the aperture installed. The aperture is not used to determine the true luminance at the exit port of the secondary sphere but merely scale it by the desired amount. A precision silicon detector-filter combination with an accurate photopic response mounted in the wall of the primary sphere tracks the luminance in the primary sphere at higher levels for accuracy purposes, and the luminance display is scaled to indicate the actual luminance at the exit port of the secondary sphere. The actual luminance of the exit port is calibrated via measurements, and then the monitor detector gain is scaled appropriately via a calibration factor programmed into memory. The optics head has a 150-W tungsten-halogen, reflectorized lamp with a motorized, computer controlled, variable aperture between the lamp and the entrance port of the primary sphere. This combination provides for continuous adjustment of the sphere luminance over a range of more than 10 6, which is tracked and displayed by the OL 462-C Controller. The in-line sphere port concept with an intermediate spider baffle provides for exceptional uniformity in the near normal luminance across the radiating port. A motorized, computer-controlled shutter is located between the lamp and the entrance port of the primary sphere. The luminance/ radiance output can be switched between zero and any desired level without adjustment or lamp changes. An optional filter holder mounted at the exit port accommodates alignment targets, filters, de-coupling diffusers, etc. for specific user requirements. Spectral shaping filters can be utilized to simulate various sources such as illuminates A, B, C, D65, etc. In addition to luminance and color temperature, the OL Series 466 can be obtained with calibration for spectral radiance over the 350 to 1100 nm wavelength range. CONTROLLER The microprocessor based OL 462 Controller performs all the system interface and monitoring functions. An automatic ramp up/ down function eliminates potentially dangerous current surges to the lamp. Luminance, color temperature, lamp current and operational prompts are displayed on a two line by 20 character alphanumeric vacuumfluorescent display. A 20-key keypad, rotary encoder knob, and main system power switch are also located on the front panel for easy access to all system functions. Luminance is displayed with 5 digit resolution in units specified by the user. As an option, the display can be factory programmed to read out in virtually any pertinent units the user desires. The Controller computes the color temperature of the source and displays lamp current or color temperature over the range of 2000 to 3000K. The luminance, color temperature, and lamp current can also be set by an external computer via the standard RS-232C interface. RS-422 and GPIB (IEEE-488) interfaces are also available. An internal microprocessor controlled lamp timer enables the user to track the number of hours the lamp has been in operation. Bulletin 118 / Rev 7-11 Page 1 of 2

OL Series 466 Automated Low Light Level Integrating Sphere Calibration Standard OL 466-OH OPTICS HEAD Luminance Uncertainty... ± 2 % relative to NIST Color Temperature Range... 2000 to 3000 K Color Temperature Uncertainty... ± 25 K Source Stability @ 2856 K Short Term... ± 0.5% Long Term... ± 2% 100 hours/1 year Spectral Radiance Uncertainty @ 550 nm... ± 2% relative to NIST Sphere Coating (reflectance)... > 99% (350 to 1100 nm) Variable Aperture... Automated Micrometer (Motorized) Shutter... Automated (Open/Closed) OL 462-C CONTROLLER Luminance Display (5 digits)... fl or cd/m 2 * Luminance Display Range... 1 E-8 to 50,0000 fl (Auto-ranging) Lamp Current Display... 4 digits Range... 0 to 6.500 amperes DC Power Cycle... 60 second ramp function Accuracy... ± 0.05% @ 6.500 amperes Regulation... ± 0.01% for 10% line variation Temperature Regulation... ± 0.025%/10 C Lamp Timer... 0 to 1000 hours Operating Temperature Range... 15 to 35 C Operating Humidity Range... 10% to 85% (noncondensing) Power (user selectable)... 115 or 230 VAC ± 10%, 50/60 Hz Size... 18 x 18 x 5¼ Weight... 39 lbs. *Luminance can be displayed in other units. Model Number Sphere Exit Port LUMINANCE LEVELS (nominal) Uniformity Maximum Luminance @ 2856 K @ 3000 K Display Resolution OL 466-4 4 1 ±1.0% 80 fl 130 fl 0.5 E-7 fl OL 466-6 6 1½ ±1.0% 40 fl 70 fl 0.4 E-7 fl OL 466-8 8 2 ±1.0% 29 fl 40 fl 0.2 E-7 fl OL 466-12 12 3 ±1.0% 14 fl 23 fl 1.0 E-7 fl OL 466-18 18 6 ±2.0% 4 fl 7 fl 1.0 E-8 fl Other configurations available upon request. CALIBRATION OPTIONS OL 466-X... luminance, color temperature OL 466-X-1... luminance, color temperature, 1/ spectral radiance (350 to 1100 nm) OL 466-X-U... uncalibrated * Note: "X" designates the diameter of the integrating sphere. 1/ Spectral radiance measured at a color temperature of ~3000K unless otherwise specified. Bulletin 118 / Rev 7-11 Page 2 of 2

OL 480 Blackbody Calibration Standard The OL 480 Blackbody Calibration Standard provides an accurate, high temperature (100 to 1200 C) source of infrared radiation. It is specifically designed for calibrating infrared radiometric and spectroradiometric measurement systems. The blackbody features a unique, uniformly heated recessed cone cavity with an emissivity of 0.99 ± 0.01. Accuracy of calibration is ensured by the use of a NISTtraceable platinum vs. platinum 10% rhodium thermocouple. An 8-position aperture wheel provides a convenient means of controlling the flux radiated by the blackbody (Table 1). The small aperture sizes enable the source to be used as a point source target at a finite working distance, while the larger apertures allow direct calibrations for radiance. A convenient microprocessor-based, self-tuning digital PID controller holds the selected temperature to within ± 0.05% of full scale. The controller has dual displays with the lower display indicating the desired set point and the upper display indicating the actual blackbody source temperature. The OL 480 features: Digital Controller Direct Mount Modulators Available 16 Interval Ramp and Hold from Front Panel Two (2) Customer Configured Alarm Relays One (1) Year Warranty RS-232C/422A/485 or IEEE-488 (optional) Temperature Range Accuracy Resolution Overall System Stability Cavity Opening Cavity Type SPECIFICATIONS SOURCE 50 to 1200 C 50 to 1050 C (optional) ± 0.2% ± 1 digit 0.1 C ± 0.02% of full scale per 24 hour period 1.0 (25mm) Recessed 20 cone Emissivity 0.99 ± 0.01 Sensing Element Max. Aperture Temp Rise Max. Housing Temp Rise Type S Thermocouple Platinum/Platinum-10% Rhodium special 0.01% tolerance, matched to sensing T/C 30 C 20 C Dimensions 11.75 X 8 X 11.4 Net Weight CONTROL MODULE 17 lbs. Dimensions 5.1 X 12 X 13.4 Net Weight Warm-Up time (ambient to 1200 C) Operating temperature Controller Cooling Power req. 9 lbs. 50 minutes 0-50 C Digital Auto-Tune PID Fan cooled 110-120vac,50/60Hz,1 Phase 5.0 amp max 220 vac option available (installed internally) Bulletin 104 / Rev 9-12 Page 1 of 2

OL 480 Blackbody Calibration Standard Inches Table 1 Aperture Sizes Millimeters 1.000* 25.40* 0.600 15.2 0.400 10.2 0.200 5.1 0.100 2.5 0.050 1.3 0.025 0.6 0.0125 0.4 *Cavity Opening Blackbody Spectral Radiant Emittance At Various Temperatures Bulletin 104 / Rev 9-12 Page 2 of 2