Presentation is loading. Please wait.

Presentation is loading. Please wait.

Visually Coupled Systems Hardware and the Human Interface By Dean Kocian and H. Lee Task Summarized by Geb Thomas.

Similar presentations


Presentation on theme: "Visually Coupled Systems Hardware and the Human Interface By Dean Kocian and H. Lee Task Summarized by Geb Thomas."— Presentation transcript:

1 Visually Coupled Systems Hardware and the Human Interface By Dean Kocian and H. Lee Task Summarized by Geb Thomas

2 Topics n HMD optical systems n Helmet/Head tracking systems n System Integration n Applications

3 Visually Coupled Systems (VCS) n Integrates the natural visual and motor skills of an operator into the system he is controlling –head- or helmet-mounted visual display –head tracking and/or eye tracking system –visual information dependent on above signals physical source synthetic source

4

5 Simple Magnifier

6 Compound Microscope

7 See-Through HMD Type II has see-through, Type 1 has none.

8 Miniature Image Source n Emissive versus non-emissive n Monochrome (narrow bandwidth) versus color n Magnification n Luminance –diffuse versus Lambertian emitter n Resolution

9 Emissive Displays n Lasers -- low power, requires very reliable scanning system, requires high scan rates to avoid flicker problems n Field-emission displays (FEDs) -- Mission of individual electron emitter guns, combine to light a single pixel. Prototype 512x512 displays operate at 5kV

10 Miniature CRTs n Best choice for many see-through HMDs. n Disadvantages: long dimensions, high- voltage power supply, weight, hand assembly required n Advantages -- light conversion efficiency, resolution (>1M resolution elements/20 mm.), geometry correction in scan electronics.

11

12 Non-emissive Displays n Low voltage n Low current n Thermally sensitive n Subtractive color for LCDs.

13 Tracking Systems n Head/Helmet-mounted tracker (HMT) n Position and orientation tracker (P&OT) n Head orientation and position (HOP) n Resolution must be known and repeatable. n Multiple frames of reference (Eye, Earth, Space, Aircraft)

14

15 System Characteristics n System head coverage and motion box n Static accuracy n Resolution and repeatability n Update rate, throughput rate, and display refresh rate –for visual 240 Hz is OK, –for spatial hearing, may be required n # transducers, interference

16

17 System Integration n Ocularity –Monocular –Biocular –Binocular n Color n Type I or II n Field of View –Mono, total, binocular n Field of regard n Resolution n Luminance n Combiner ratio –transmittance, reflectance n Vignetting n Exit pupil size n Eye relief distance

18 More Integration Issues n Interpupillary distance mm n Distortion (barrel or pin-cushion) n Update rate n Refresh rate n Eye relief vrs FOV n Resolution vrs FOV n Focus/accommodation


Download ppt "Visually Coupled Systems Hardware and the Human Interface By Dean Kocian and H. Lee Task Summarized by Geb Thomas."

Similar presentations


Ads by Google