Athermal interferometer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 21, 2005
Grant Date -
Oct 24, 2002
app pub date -
Feb 26, 2002
filing date -
Feb 27, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus is described for controlling the optical path length in an optical device, e.g. an interferometer, and more importantly to maintaining the optical path length difference in an interferometer. The apparatus may include an adjustable plate optically coupled with a beamsplitter. The plate may be rotated such that its surface receives light propagated from the beamsplitter at a non-zero incident angle. In one embodiment, temperature sensitivity is addressed by ensuring that the refractive index of the plate is greater than the refractive index of the beamsplitter. In another embodiment, the apparatus includes combination spacers having a component selected in dependence upon a composition, thickness, and orientation of the adjustable plate.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2002 Application Filing Year
- G02B Class
- 5100 Applications Filed
- 2214 Patents Issued To-Date
- 43.42 % Issued To-Date
