Method and apparatus for correcting shifts between a reference f

Details Method and apparatus for correcting shifts between a reference f Method and apparatus for correcting shifts between a reference f

1997-03-11

1999-11-02

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902

Patent

active

059780860

ABSTRACT:
Structural components are added to an interferometric objective to offset the effects of temperature variations. The components are mounted between the sleeve housing the optics of the objective and the collar housing the optics of the interferometer. Each component is coupled sequentially, such that the thermal response of the assembly is substantially the linear combination of the response of each component and is designed to cause a shift in the opposite direction to the shift produced by a temperature change in the unmodified device. The thermal characteristics and dimensions of the components are chosen empirically to provide a minimum shift between the reference mirror and focal point in the interferometric objective as a function of temperature.

REFERENCES:
patent: 5067808 (1991-11-01), Alscher
patent: 5315110 (1994-05-01), Smith

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