Range responsive apparatus

Details Range responsive apparatus Range responsive apparatus

1975-02-13

1983-04-26

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

250338, 350292, 350299, G01C 308

Patent

active

043811493

ABSTRACT:
The invention provides a range responsive apparatus primarily intended for operation at infra-red. A detector is arranged to receive electro-magnetic energy simultaneously from different spaced portions of a field of view which is caused to rotate so as to sweep across a target. The electrical output of the detector includes a frequency component which is dependent upon the range of the target. Two detectors are normally provided each receiving energy from alternate portions of the field of view, the outputs of the two detectors being combined in anti-phase. Use may be made of frequency filters to create one or more range windows and frequency responsive means provided either simply to give an indication of target presence within a range window or the actual range of the target.

REFERENCES:
patent: 2878711 (1959-03-01), Blackstone
patent: 3059521 (1962-10-01), Clemens et al.
patent: 3856401 (1974-12-01), Heitmann et al.
patent: 3888589 (1975-06-01), Swift

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