Browse Prior Art Database

Hinged Elliptic-Cylinder Illumination System

IP.com Disclosure Number: IPCOM000038982D
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 76K

Publishing Venue

IBM

Related People

Grant, DE: AUTHOR

Abstract

A low-eccentricity, elliptic-cylinder illumination system which provides a narrow footprint on a document is described in IBM Technical Disclosure Bulletin 27, 7A, 3833 (December 1984). An additional improvement in this system consists of providing flexible hinge 15 (for example, adhesive elastomer) on elliptical- cylindrical reflector 1 which is located behind reflector mirror 5. The hinge 15 is located along the minor axis of the elliptical reflector at point 7 where the magnification ratio is essentially one. Hinge 15 allows the two sections of the reflector to be adjusted relative to each other so that the maximum reflected intensity focal points from each section can be made to coincide; thus maximizing the intensity profiles at document glass 3.

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Hinged Elliptic-Cylinder Illumination System

A low-eccentricity, elliptic-cylinder illumination system which provides a narrow footprint on a document is described in IBM Technical Disclosure Bulletin 27, 7A, 3833 (December 1984). An additional improvement in this system consists of providing flexible hinge 15 (for example, adhesive elastomer) on elliptical- cylindrical reflector 1 which is located behind reflector mirror 5. The hinge 15 is located along the minor axis of the elliptical reflector at point 7 where the magnification ratio is essentially one. Hinge 15 allows the two sections of the reflector to be adjusted relative to each other so that the maximum reflected intensity focal points from each section can be made to coincide; thus maximizing the intensity profiles at document glass 3. A simpler manufacturing process for the segmented reflector halves also results since the adjusting feature allows for looser tolerances.

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