Aspheric lens having a plurality of lenslets disposed substantia

Details Aspheric lens having a plurality of lenslets disposed substantia Aspheric lens having a plurality of lenslets disposed substantia

1990-12-31

1993-02-16

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250216, 359 20, H01J 4014

Patent

active

051873605

ABSTRACT:
The lens includes a plurality of lenslets arranged substantially contiguously in an array. Each lenslet is adapted to receive radiation from a particular zone not substantially overlapping with adjacent zones, and to focus said radiation to a predetermined common point. A detector may be located adjacent said common point and preferably includes at least two detector elements each to detect infra red radiation from a different zone.

REFERENCES:
patent: 3958118 (1976-05-01), Schwarz
patent: 4516832 (1985-05-01), Jain et al.
patent: 4717821 (1988-01-01), Messiou
patent: 4876445 (1989-10-01), McMaster
patent: 4930864 (1990-06-01), Kuster et al.

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