US 11,852,533 B2
Explosion-proof and flameproof enclosure for Raman systems
Scott Sutherland, Spring, TX (US); Manfred Jagiella, Notzingen (DE); and Joseph Slater, Dexter, MI (US)
Assigned to Endress+Hauser Optical Analysis, Inc., Ann Arbor, MI (US)
Filed by Kaiser Optical Systems Inc., Ann Arbor, MI (US)
Filed on Dec. 15, 2021, as Appl. No. 17/551,362.
Claims priority of provisional application 63/127,522, filed on Dec. 18, 2020.
Prior Publication US 2022/0196473 A1, Jun. 23, 2022
Int. Cl. G01J 3/44 (2006.01); G01J 3/02 (2006.01)
CPC G01J 3/0291 (2013.01) [G01J 3/0218 (2013.01); G01J 3/0286 (2013.01); G01J 3/44 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A Raman analysis system, comprising:
an excitation source adapted to generate excitation radiation;
an optical apparatus configured to transmit the excitation radiation to a sample under investigation and to convey optical energy collected from the sample to a spectrograph, wherein the collected optical energy includes a Raman spectrum of the sample;
the spectrograph including an optical grating, operative to separate the optical energy collected from the sample into a Raman spectral signal, and a detector configured to receive the Raman spectral signal and convert the Raman spectral signal into an electrical signal representative of the Raman spectrum of the sample;
a controller in communication with the spectrograph, the controller configured to receive the electrical signal from the detector to display and/or store the Raman spectrum of the sample; and
at least one flame-resistant or explosion-resistant enclosure, wherein at least a portion of the spectrograph is disposed in the at least one enclosure and separate from other components of the Raman analysis system, wherein:
the optical grating of the spectrograph is disposed in a flame-resistant or explosion-resistant first enclosure of the at least one enclosure, the first enclosure including a first sealed window;
the detector of the spectrograph is disposed in a flame-resistant or explosion-resistant second enclosure of the at least one enclosure, the second enclosure including a second sealed window; and
the Raman spectral signal from the optical grating is transmitted to the detector through the first sealed window and second sealed window.