Browse Prior Art Database

Structured Target Light Valve

IP.com Disclosure Number: IPCOM000046441D
Original Publication Date: 1983-Jul-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Altman, C: AUTHOR

Abstract

Electrostatically deflectable mirror array light valves typically consist of an array of cantilevered reflective elements arrayed on a transparent substrate mounted behind the faceplace of a CRT. Light is made incident on the underside of these elements by shining it through the substrate. Deflection of the elements by electrostatic means causes this valve to function.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Structured Target Light Valve

Electrostatically deflectable mirror array light valves typically consist of an array of cantilevered reflective elements arrayed on a transparent substrate mounted behind the faceplace of a CRT. Light is made incident on the underside of these elements by shining it through the substrate. Deflection of the elements by electrostatic means causes this valve to function.

A light valve of similar structure but not requiring a transparent substrate, and which for practicable electron-beam diameters will have a greater resolution capability than the conventional light valve, can be made by creating an array of elements of the type shown in the figure.

In this structure, the valve element supporting post 10 provides a through conductive path from the CRT beam side of substrate 12 to the conductive and reflective surface material 14 of the valve element. Thus, material 14 receives a charge from the electron beam which co- acts with a reference potential (ground) line 16 to deflect the valve element.

Light 18 from the front side of substrate 12, that is from the side facing the exterior of the CRT, is reflected by the valve element surface in a selective manner. Since the target area 20 presented to the electron beam 22 is small, the spacing between adjacent target areas is such as to ease electron-beam registration requirements for a given optical resolution.

1

Page 2 of 2

2

[This page contains 3 pictures or other non-text objects]