G - Physics – 01 – J
Patent
G - Physics
01
J
G01J 3/18 (2006.01) G01J 3/28 (2006.01)
Patent
CA 2253523
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 N1; (d) a second reflectance grating for further dispersing the collimated beam, the second reflectance grating having a number of grooves N2; 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.
Atkinson George H.
Yan Yu
Innovative Lasers Corporation
Sim & Mcburney
LandOfFree
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