Method and apparatus for automatically compensating for rotation

Details Method and apparatus for automatically compensating for rotation Method and apparatus for automatically compensating for rotation

1981-11-25

1984-01-24

Sikes, William L.

350539, G02B 2100

Patent

active

044272693

ABSTRACT:
In articulated optical systems, rotation of the image takes place due to the articulations. The invention eliminates this disadvantage by producing a signal whose polarity is dependent on the direction of rotation in which the image produced in the observation plane (64) is turned with respect to the object. By the signal, a compensation element (72) arranged in the articulated optical system is turned until the signal has disappeared. Two devices are disclosed for producing the signal: 1. At the start of the articulated optical system a mark (16) is introduced by reflection, it being focused at the end of the articulated optical system on a sensor (67). 2. On all articulations there are arranged position transmitters (111,112, etc.) which are connected with a minicomputer (130) which calculates the resultant image rotation and gives off a corresponding signal via a digital analog converter (131).

REFERENCES:
patent: 2454959 (1948-11-01), Barnes
patent: 2667813 (1954-02-01), MacGill
patent: 3039204 (1962-06-01), Bryan et al.
patent: 4291937 (1981-09-01), Baudot

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