Target acquisition apparatus

Details Target acquisition apparatus Target acquisition apparatus

1998-05-15

2000-04-25

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

2502061, 2502082, G01C 2102, G01J 142

Patent

active

060547014

ABSTRACT:
A target acquisition apparatus (10) having a laser beam source (12), wherein associated with the laser beam source (12) is an opto-mechanical tracking device (14) having a receiver (38) for reception of the laser beam which is reflected by a target (28). For evaluation of the signals of the receiver (38) there is provided an electronic evaluation device (18) which is connected together with the opto-mechanical tracking device (14). The receiver (38) has a photovoltaic four-quadrant detector (36) by which two orthogonal spatial direction co-ordinates (X, Y) are established. In order to compensate for dissimilar performance on the part of the quadrant detectors (E1, E2, E3, E4) of the four-quadrant detector (36) as is not to be ruled out for example due to temperature-induced or ageing-induced drift, the electronic evaluation device (18) is provided with switches (S1, S2, S3, S4) for signal inversion purposes.

REFERENCES:
patent: 3657547 (1972-04-01), Mansfield
patent: 4112294 (1978-09-01), Pressiat
patent: 4713533 (1987-12-01), Bremer et al.
patent: 5381236 (1995-01-01), Morgan
patent: 5600434 (1997-02-01), Warm et al.

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