Patent ID: 11906500
Assignee: GOVERNMENT OF THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. The apparatus of claim 1 wherein:
a) said chamber has a symmetric shape or an asymmetric shape;
b) said apparatus comprises three or more heat sources capable of heating three or more areas of said chamber;
c) said apparatus comprises two or more areas of optical access to said chamber;
d) said one or more devices for providing a pressure differential between said chamber's inlet and said chamber's outlet comprises a pump and/or pressurized vessel providing a pressure differential between said chamber's inlet and said chamber's outlet;
e) said one or more devices for controlling the absolute pressure in said chamber comprises one or more pressure or flow regulator devices located either upstream or downstream of said at least one heat source;
f) each of said one or more devices for providing light to said one or more areas of optical access to said chamber is independently a laser, a lamp, a light emitting diode or a glow bar;
g) each of said one or more devices for collecting light from said one or more areas of optical access to said chamber comprises a fiber optic device or a free space coupled device;
h) each of said one or more devices for measuring one or more properties of said collected light and optionally one or more properties of said provided light is independently a spectrometer, a monochromator, a spectrum analyzer, a photodiode, a photomultiplier tube, an avalanche detector, a camera, a charge coupled device array, a complementary metal oxide semiconductor detector, a photoreceiver, or a polarimeter.