Louis D. Silverstein

49.3: H‐PDLC Color Separation Device for Image Capture Systems

A novel device for separation of color image components in image capture systems is described. The device is based upon temporal switching of HPDLC elements with tunable spectral passbands. The device may be operated as either a reflective RGB color separation mirror or a transmissive CMY color separation filter. A breadboard color image capture system using this device for color separation has been developed and tested as a proof of concept.

High-resolution AMLCD for the electronic library system

The Electronic Library System (ELS), is a proposed data resource for the cockpit which can provide the aircrew with a vast array of technical information on their aircraft and flight plan. This information includes, but is not limited to, approach plates, Jeppeson Charts, and aircraft technical manuals. Most of these data are appropriate for digitization at high resolution (300 spi). Xerox Corporation has developed a flat panel active matrix liquid crystal display, AMLCD, that is an excellent match to the ELS, due to its innovative and aggressive design.

Advances and applications for color HPDLC reflective technologies

We report on the recent advances made by our groups in the technology and applications of Holographically formed Polymer Dispersed Liquid Crystal (HPDLC) devices. In this paper we will briefly review some of the basic operating principles of HPDLC devices and their salient features as applied to display and image capture applications. The usability of HPDLC films in displays is enhanced by incorporating diffusion into the films. The photopic reflectance and reflection bandwidth of an HPDLC device can be improved by stacking multiple films of HPDLC material between one set of electrodes. HPDLC mirrors can be used to advantage in an electronic image capture system.

Resolution in information display

This paper describes the system tradeoffs related to display type, resolution, and pixel structure, taking examples from the development of binary and grayscale high resolution AMLCDs. Performance is related to the match achieved between the human visual system, the display system and the task assigned. The active matrix liquid crystal display is compared to other technologies at the high acuity levels achieved in a 282 DPI monochrome grayscale and a 141 color groups per inch color grayscale AMLCD. The potential benefits to military aviators of very high resolution displays are outlined as well as the challenges to implement these systems.