Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

High Speed Optical Scanner

IP.com Disclosure Number: IPCOM000091334D
Original Publication Date: 1968-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 3 page(s) / 69K

Publishing Venue

IBM

Related People

Cooper, L: AUTHOR

Abstract

High-speed optical scanner 20 of A includes outer and inner concentric opaque cylinders 21 and 22. There are N transparent slits, such as slit 23, which are symmetrically disposed about the lateral wall of cylinder 21. Cylinder 22 is provided with N + 1 transparent slits, e.g., slit 24, that are also symmetrically disposed about its lateral wall. Conical reflecting prism 25 is concentrically disposed within cylinder 22. In one arrangement, each end of N fiber optic elements e.g., elements 1...16, is radially aligned and juxtaposed with an exclusive one of the transparent slits of cylinder 21. Cylinder 22 is rotated by devices, not shown, in a clockwise direction with respect to cylinder 22 as indicated by arrow 22a.

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 52% of the total text.

Page 1 of 3

High Speed Optical Scanner

High-speed optical scanner 20 of A includes outer and inner concentric opaque cylinders 21 and 22. There are N transparent slits, such as slit 23, which are symmetrically disposed about the lateral wall of cylinder 21. Cylinder 22 is provided with N + 1 transparent slits, e.g., slit 24, that are also symmetrically disposed about its lateral wall. Conical reflecting prism 25 is concentrically disposed within cylinder 22. In one arrangement, each end of N fiber optic elements e.g., elements 1...16, is radially aligned and juxtaposed with an exclusive one of the transparent slits of cylinder 21. Cylinder 22 is rotated by devices, not shown, in a clockwise direction with respect to cylinder 22 as indicated by arrow 22a.

In the application of B, light source 26 is directed toward collimated lens system 27 with the spurious light being reflected by shield 28. The collimated light beam is parallel to center axis 29 of scanner 20 and is reflected by prism 25 in a radial omnidirectional manner normal to the inner surface of the wall of cylinder 22. The light which passes through the slits of cylinder 22 impinges in a normal direction onto the inner surface of the wall of cylinder 21. As a consequence, when cylinder 22 is rotated, the light emanates from the slits of cylinder 21 in a sequential manner where it is transmitted through the particular fiber optic element adjacent to it. The other ends of fiber optic bundle 30 are arranged in a predetermined matrix or array so as to provide, for example, a raster type scan of document 31. The intensity of the light reflected from document 31 is modulated by the dark and light areas of the document characters. It is sensed by phototransducer 32. The latter can, for example, be a single PMT or an array of PMT's that convert the intensity modulated light signal into a serial or parallel electrical signal, respectively, that represents the information contained in document 31.

In the application of C, light 33 from light source 34 is directed toward document 35 and reflected onto the ends of fiber optic bundle 30 which are arranged in a square array. The light is transmitted by the elements of bundle 30 to their opposite ends. These, in turn, transmit the light emanating from them normal to the outer surface of cylinder 21 and through the slits provided in it. The light which passes through the slits of cylinder 21 impinges normal to the surface of cylinder 22. When the latter is rotated, the light is transmitted in a sequential manner through th...