Optical image subtraction employing electron trapping materials

Details Optical image subtraction employing electron trapping materials Optical image subtraction employing electron trapping materials

1991-05-08

1992-09-01

Fields, Carolyn E.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

250330, G03C 516

Patent

active

051441454

ABSTRACT:
A method for using electron trapping materials to perform subtraction of images. One image is written onto a 2-dimensional screen of electron trapping material. A second image that has many of the elements of the first, but less than the total number of elements of the first, is erased from the electron trapping screen with infrared light. An exposure of the entire screen to infrared light results in luminescence output from those regions in which electrons remain trapped after the subtraction. Potential applications include machine inspection, image compression, etc. Images can be written on the screen of electron trapping material using energetic radiation or using short wavelength visible light.

REFERENCES:
patent: 5051587 (1991-09-01), Arakawa
patent: 5065023 (1991-11-01), Lindmayer

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