06151112 is referenced by 7 patents and cites 10 patents.

In accordance with the present invention, a high-resolution, compact spectrometer is provided for dispersing wavelengths .lambda. of an incoming beam for detection by a detector. The spectrometer comprises: (a) an entrance slit through which the incoming beam passes; (b) a first mirror for collimating the beam from the entrance slit; (c) a first reflectance grating for dispersing the collimated beam to form a beam having a spectral intensity distribution, the first reflectance grating having a number of grooves N.sub.1 ; (d) a second reflectance grating for further dispersing the collimated beam, the second reflectance grating having a number of grooves N.sub.2 ; and (e) a second mirror for focusing the collimated and dispersed beam, wherein the spectrometer has a substantially symmetrical construction. The symmetrical construction of the spectrometer doubles the resolution and dispersion of the gratings. The compact and high-resolution imaging spectrometer is capable of measuring the absorption lines of gases in high sensitivity gas sensors with an intracavity cell.

Title
High-resolution, compact intracavity laser spectrometer
Application Number
8/971525
Publication Number
6151112
Application Date
November 17, 1997
Publication Date
November 21, 2000
Inventor
Yu Yan
Tucson
AZ, US
George H Atkinson
Tucson
AZ, US
Agent
Benman & Collins
Assignee
Innovative Lasers
AZ, US
IPC
G01J 3/18
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