04001840 is referenced by 35 patents and cites 11 patents.

A non-photographic, digital laser image recording and reading method and apparatus for recording and reading visual, two-dimensional replicas or representations of objects, pictures, illustrations, computer outputs and the like. A flat-field twin objective is employed to project the image of a laser beam focused to a diffraction limited spot on a radiation sensitive material, e.g., a heat ablatable or vaporizable recording medium to create a two-dimensional ensemble of holes in the recording medium. The recording medium comprises thin metallic films carried on flat substrates which are moving at constant speed or are immovably held while the image of the diffraction limited spot is scanned thereover by angularly deflecting the laser beam entering the twin objective. The visual laser record is an instantaneous replica of an original image or its computer processed binary equivalent.

Title
Non-photographic, digital laser image recording
Application Number
5/512782
Publication Number
4001840
Application Date
October 7, 1974
Publication Date
January 4, 1977
Inventor
William J Kaspari
Portola Valley
CA, US
Herman Wong
Los Altos Hills
CA, US
Carl H Becker
Menlo Park
CA, US
Agent
Townsend and Townsend
Assignee
Precision Instrument Co
CA, US
IPC
G01D 15/14
View Original Source