System for fine focusing a camera on a moving curved surface

Details System for fine focusing a camera on a moving curved surface System for fine focusing a camera on a moving curved surface

1986-02-24

1987-09-08

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

354402, 358227, 358 10, G03B 310, G01N 2100, H04N 1700

Patent

active

046926054

ABSTRACT:
A system for fine focusing a camera on one surface of a moving curved transparent object includes a digital storage device. The focusing range of the camera is stored in the storage device. A thickness transducer provides a signal representative of the thickness of the object and a displacement transducer provides a signal representative of the distance between the object and the camera. The thickness and the displacement signals are added and provided to the storage device. When the added value is outside the stored range the camera is focused to cause the added value to fall at the middle of the range.

REFERENCES:
patent: 4525735 (1985-06-01), Krufka
patent: 4563088 (1986-01-01), Gullman
patent: 4635124 (1987-01-01), Andreatti, Jr. et al.

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