04172219 is referenced by 37 patents and cites 12 patents.

A layer of material which absorbs incident focussed laser light and undergoes a resultant heating is arranged in the focal plane of a lens matrix. Laser light is projected onto such layer through the lens matrix itself. The laser light is focussed by the lens elements of the lens matrix onto the layer effecting a highly localized heating of small well-defined portions of the layer. At those small well-defined portions, the material of the layer, as a result of the highly localized heating, removes itself to form the apertures of a lens-aperture matrix which is thereafter used in cooperation with the lens matrix as a rear projection or daylight projection screen.

Title
Daylight projection screen and method and apparatus for making the same
Application Number
5/661120
Publication Number
4172219
Application Date
February 24, 1976
Publication Date
October 23, 1979
Inventor
Ulrich Greis
Weyarn
DE
Dieter Giglberger
Unterhaching
DE
Reinhold Deml
Munich
DE
Agent
Michael J Striker
Assignee
AGFA Gevaert
DE
IPC
B23K 27/00
View Original Source