Compensator which experiences thermal expansion to compensate fo

Details Compensator which experiences thermal expansion to compensate fo Compensator which experiences thermal expansion to compensate fo

1997-02-26

1999-11-09

Kim, Robert H.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356345, G01B 902

Patent

active

059824883

ABSTRACT:
An apparatus which includes a transparent material and a compensator. Light travels through the transparent material for an optical distance. The compensator is attached to the transparent material and experiences thermal expansion which deforms the transparent material to reduce changes in the optical distance caused by changes in temperature of the transparent material. The optical distance is defined as a product of the refractive index of the transparent material and the physical length of an optical path travelled by the light through the transparent material. Preferably, the compensator reduces changes in the optical distance so that the optical distance is maintained to be approximately constant.

REFERENCES:
patent: 5059026 (1991-10-01), Zoechbauer
patent: 5289552 (1994-02-01), Miller et al.
patent: 5321539 (1994-06-01), Hirabayashi et al.
M. Shirasaki, Large Angular-Dispersion By Virtually-Images Phased-Array (VIPA) And Its Application To Wavelength Demultiplexing, Presented at MOC'95 (Microoptics Conference) , Paper PD3, Oct. 20, 1995, Hiroshima Japan.
M. Shirasaki, Temperature Independent Interferometer For WDM Filters, Paper WeD.1.6 ECOC '96 (European Conference on Optical Communication), Sep. 18, 1996.

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