Phase compensated zone plate photodetector

Details Phase compensated zone plate photodetector Phase compensated zone plate photodetector

1976-03-23

1977-04-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250216, 350162ZP, H01J 3912

Patent

active

040164160

ABSTRACT:
A radiation transparent base having a number of coincentric Fresnel rings mounted on one face, and one-quarter wavelength in thickness and a reflective coating covering the face and rings and a detector mounted on the opposite face to collect reflected in phase radiation.

REFERENCES:
patent: 3631360 (1971-12-01), Lehovec
patent: 3668404 (1972-06-01), Lehovec
patent: 3902794 (1975-09-01), Abrams

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