Browse Prior Art Database

REFLEX EXPOSURE CONTROL

IP.com Disclosure Number: IPCOM000023060D
Original Publication Date: 1976-Jul-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 356K

Publishing Venue

Xerox Disclosure Journal

Abstract

A reflex exposure control device 35 comprising a transparent substrate 102 having deposited thereon linear, electroded stripes 101, a light scattering liquid crystalline composition 103, and transparent electrode 104 uniformly coating trans~ parent substrate 105 having an arcuate surface covered with reflective coating 106.

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 58% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

REFLEX EXPOSURE CONTROL
Charles J. Ursa

Gary A. Dir

~ed Classification

U.S. Cl, 350/16OLC
mt. Cl, G02b 5/23

FIG. /

/08/02/05

FIG. 2

/07

A reflex exposure control device 35 comprising a transparent
substrate 102 having deposited thereon linear, electroded

stripes 101, a light scattering liquid crystalline composition
103, and transparent electrode 104 uniformly coating trans~
parent substrate 105 having an arcuate surface covered with
reflective coating 106.

In another embodiment, electrode 104 is provided on a planar
transparent substrate 107 and light beam shaping is provided

by reflective coating 106 on the concave surface of trans-
parent substrate 108.

In a further embodiment, compensation is made for the fal1-~

off in intensi~y near the ends of fluorescent lamps commonly
called ~cosine fall-~off factor~. Electrode stripes 101 are

/06/03

Volume 1 Number 7 July 1976 51

FIG. 3

1/2

1/3

(

[This page contains 1 picture or other non-text object]

Page 2 of 2

REFLEX EXPOSURE CONTROL (Cont~d)

provided with non-~para11e1, converging edges 110 and 111,
and 112 and 113 at opposing edges of substrate 102, The

amount of convergence of the pair of electrode stripe

edges, the spacing between electrode stripes 101, and the
portions of electrode stripes 101 which require parallel'

edges are mathematically determined to provide an effective
constant total exposure value for the entire area of elec~
troded substrate 102, upon activation of the device, for

any particu...