Method and apparatus for eliminating alignment error in an...

Details Method and apparatus for eliminating alignment error in an... Method and apparatus for eliminating alignment error in an...

2005-03-08

2005-03-08

Spector, David N. (Department: 2873)

Optical: systems and elements

Lens

With support

C372S033000

Reexamination Certificate

active

06865034

ABSTRACT:
A system is provided for nulling out or eliminating alignment errors in an optical system by moving a lens to capture and center a collimated beam laterally-shifted by thermal excursions, thus to couteract the boresight error caused by the thermally-induced lateral shifting. As a result, alignment error the thermal coefficient of expansion characteristics of the optical elements and their mounting systems caused by lateral off-sets is corrected by moving a lens or lens system in response to thermal changes in a direction which moves the lens so that the collimated light impinging on the lens is made to come in on the optical axis of the lens.

REFERENCES:
patent: 4649274 (1987-03-01), Hartmann

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