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Browse Prior Art Database

SMALL APERTURE PICTURE FRAME

IP.com Disclosure Number: IPCOM000024791D
Original Publication Date: 1982-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 67K

Publishing Venue

Xerox Disclosure Journal

Abstract

Scanning arrays, such as linear Charge Coupled Devices (CCD's), which are used to convert an imaged document into a serial stream of video image signals are normally received from the manufacturer with a glass cover in place to protect the array from damage, dirt, etc. However, the glass may introduce additional light loss and optical distortions into the scanning system.

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XEROX DISCLOSURE JOURNAL

SMALL APERTURE PICTURE FRAME Proposed Richard M. Baran Classification

U.S. Cl. 358/213 Int. Cl. H04n 3/14

Scanning arrays, such as linear Charge Coupled Devices (CCD's), which are used to convert an imaged document into a serial stream of video image signals are normally received from the manufacturer with a glass cover in place to protect the array from damage, dirt, etc. However, the glass may introduce additional light loss and optical distortions into the scanning system.

Referring to the drawing, it is instead proposed that a picture frame 5 having a small viewing aperture 6 for the array 7 be used eliminating the need for a glass cover while keeping the array protected. It is additionally desirable that the CCD array 7 be field replaceable by service personnel without requiring realignment of the array. However, the array chip tolerances and physical construction normally make it impossible to replace an array without first prealigning the array with some intermediate surface.

In the proposed construction, the array 7 may be prealigned with the imaginary line 8 passing between the center of locator holes 9 and with the front surface 10 of the picture frame 5. This locates the array 7 in the X, Y, and 2 planes and enables the CCD chip to be replaced without realignment simply by mounting the supporting picture frame in the scanning system.

Volume 7 Number 1 January/February 1982 47

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