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CONTRAST ENHANCEMENT FOR REFLECTION VIEWING

IP.com Disclosure Number: IPCOM000022735D
Original Publication Date: 1976-Jan-31
Included in the Prior Art Database: 2004-Mar-26
Document File: 2 page(s) / 343K

Publishing Venue

Xerox Disclosure Journal

Abstract

A member for use in conjunction with imaging members which are read out in reflection is proposed. Menther 11 comprises a transparent substrate 14 having an array of rectangular blocks 13. Each block 13 is characterized by a height, H, and a base,

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XEROX DISCLOSURE JOURNAL

CONTRAST ENHANCEMENT FOR REFLECTION VIEWING
J,E, Adams
W,E, Haas

Proposed Classification
U.S. Cl. 350/276R

mt. Cl, G02b 27/00

Menther 11 comprises a transparent substrate 14 having an
array of rectangular blocks 13.

Each block 13 is characterized by a height, H, and a base,

L, wherein H = 3/2 L Tan e'~+ 2 nL Tan e~where e~is the
angle of refraction of readout light and n is zero or any
positive integer. 9~ is related to the angle of incidence
~ of readout light through Snell's law. Rectangular blocks
13 are transparent and can be made from plastics, glass and
fiber optics. The blocks can optionally be provided with reflective or mirrored walls (except top and bottom faces)

and butted together. Otherwise, total internal reflection
is utilized to contain refracted light with the blocks 13.

The readout light incident upon each block 13 is specularly
reflected in part and the remainder refracted into the
block, The refracted beam is reflected at wall A and re~
fracted through substrate 14, passing through imaging layer
16 and reflecting from reflective layer 18 (a mirror,

metallic coating or photoconductor) in specular reflection
wherein the angle of reflection is equal to the angle of

14

A member for use in conjunction with imaging members which
are read out in reflection is proposed.

Volume 1 Number 1 January 1976 99

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1CONTRAST ENHANCEMENT FOR REFLECTION VIEWING (Contd)

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