VELVET The High Contrast Simulation Projector

Transcription

1 VELVET The High Contrast Simulation Projector June 1 st, 2016 FMPT Conference Berlin Air Show Sven Ziebart, Axel Krause

2 Content Gamma curve and contrast of a projector 1 Optical properties of 2 Digital Micromirror Devices (DMD) 3 The principle of double modulation Properties of the VELVET Projector 7 8

3 Gamma curve reproduction and the contrast of a projector s ity n0.5 te In Intensity versus Gray value Gray value Intensity Projector Contrast 2000 : 1 Projector Contrast : 1 Linear scale Gamma curve for γ = 2.2 (standard value in simulation industry)

4 Gamma curve reproduction and the contrast of a projector 1.E+00 Intensity versus Gray value 1.E-01 s ity n te In 1.E-02 1.E-03 1.E-04 1.E-05 1.E-06 1.E Gray value Intensity Projector Contrast 2000 : 1 Projector Contrast : 1 Logarithmic scale Correct represantation of lowest gray levels requires a high contrast projector

5 Function principle of a DMD based projector dlp.ti.com DMD - Digital Micromirror Device (Texas Instruments)

6 DMD Digital Micromirror Device Illustration of 2 landed mirrors Top down view of landed mirrors 0.9 WQXGA DMD Pixel size 7.56 µm dlp.ti.com

7 Ray bundles of a DMD dlp.ti.com

8 Contrast reduction by stray light DMD Illumination On Illumination of the complete DMD area Lens On state energy

9 Principle of double modulation Illumination DMD Imaging DMD Illumination Lens On state energy

10 Double modulation for DMD the Zeiss-Solution Relay system has only two optical active surfaces Includes a freeform surface No color aberration Image of a point < DMD Pixel Distortion < DMD Pixel

11 Velvet Gamma curve reproduction 1.E+00 Velvet - Intensity versus Grayscale 1.E-01 s ity n te In 1.E-02 1.E-03 1.E-04 1.E-05 1.E-06 1.E Gray value Intensity True 10 bit resolution gamma curve reproduction allows pure electronic blending in dome application

12 Projection Lenses for Simulation Applications For WQXGA resolution (7.56 µm pixel size) Lateral color aberration < ½ Pixel

13 Color wheel Diameter 65 mm Segments 6 RGBRGB (Red Green Blue Red Green Blue) Speed 120 Hz (2subframes / frame) Motor Air bearing brushless DC motor Life time Start Stop cycles

14 Velvet specification DMD native resolution 2560 x 1600 Contrast Full on / off :1 Light flux 1500 lm (Dual lamp system)

15 Advantages and Benefits: Very High Contrast: 1: 2,500,000 Full immersion Absolutly black picture background (black is black) Realistic night vision presentation

16 Advantages and Benefits: Accurate Gray Scale Performance Night vision training Attention to detail reproduction Faithfulness to the lowest gray level

17 Velvet Simulation Installations Application System type Number of channels Eurofighter (Germany) Full Mission Simulator Cockpit Trainer Transall / C-160 Collimator Tornado (Germany, US location) Full Mission Simulator 30

18 Velvet development activities Night vision capability (IR channel) LED illumination Laser phosphor illumination

19 Key Advantages of Velvet Projector Highest contrast 1: 2,500,000 Optimal gray level gradation Stable brightness and color uniformity Upgrade to IR possible Modular design makes service easy No use of optical blending masks 10 bit internal blending solution for artefact free blending

20 Velvet Demonstration We invite you to visit the Velvet demonstration.

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