Image detection with image plane divider

Details Image detection with image plane divider Image detection with image plane divider

1986-06-30

1988-08-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250578, H01J 314, H01J 4014

Patent

active

047629894

ABSTRACT:
Apparatus for improving the resolution and/or field of view of an optical system without degrading the signal-to-noise ratio. An optical image of the object (1) in an image plane (8) is divided into n subimages, where n is any positive integer. Each of the n subimages is separately refocused (by 10, 20, 30) and detected (by 11, 21, 31). The optical system can be a staring or a scanning system, and can operate at any wavelength. When the number of subimages is two, an image bisector (7) is used. The bisector (7) comprises first and second highly reflective planar surfaces (12, 22). A knife edge (2), formed by the intersection of the reflective surfaces (12, 22), lies in the image plane (8). In the more general case, n-1 reflective surfaces are used, each having a knife edge lying in the image plane (8).

REFERENCES:
patent: 3654475 (1972-04-01), Montpas
patent: 4005285 (1977-01-01), Price
patent: 4044384 (1977-08-01), Inokuchi
patent: 4053773 (1977-10-01), Deresh et al.
patent: 4056720 (1977-11-01), Williams, Jr. et al.
patent: 4092531 (1978-05-01), Moss
patent: 4383170 (1983-05-01), Takagi et al.
patent: 4399356 (1983-08-01), Fiernleib et al.
Janeway et al., IBM Technical Disclosure Bulletin, vol. 20, No. 1, Jun. 1977, pp. 18-19.

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