Raman spectroscopic system with integrating cavity
First Claim
1. An apparatus for measurement of Raman scattered radiation comprising:
- a) one or more than one source of electromagnetic radiation for producing an electromagnetic radiation beam characterized by a narrow spectral width;
b) an integrating cavity comprising;
(i) an interior and an exterior, wherein a sample is placed in said interior, said integrating cavity having one or more than one port for insertion of said sample in said interior and for transmission of said electromagnetic radiation into and out from said interior, said one or more than one port extending from said exterior to said interior of said integrating cavity, and (ii) a radiation expanding element for expanding said electromagnetic radiation before said electromagnetic radiation beam comes into contact with said sample;
c) a first optical element for transmitting said electromagnetic radiation into said interior of said integrating cavity through said one or more than one port;
d) a second optical element for collecting Raman scattered electromagnetic radiation from said sample through said one or more than one port;
e) a spectrum analyzer for determining spectral composition of said Raman scattered electromagnetic radiation;
f) a detector for measuring said Raman scattered electromagnetic radiation; and
g) a system for determining a concentration of one or more than one chemical compound in said sample from Raman scattered electromagnetic radiation measured by said detector.
7 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides an apparatus for measurement of Raman scattered radiation comprising. The apparatus comprises at least one source of electromagnetic radiation for producing an electromagnetic radiation beam characterized by a narrow spectral width, an integrating cavity having an interior and an exterior, wherein a sample is placed in said interior. The integrating cavity further having at least one port for insertion of the sample in the interior and for transmission of the electromagnetic radiation into and out from the interior, the at least one port extending from the exterior to said interior of said integrating cavity. The integrating cavity also comprises a first optical element for transmitting the electromagnetic radiation into the interior of the integrating cavity through the at least one port, and a second optical element for collecting Raman scattered electromagnetic radiation from the sample through the at least one port. The apparatus also comprises a spectrum analyzer for determining spectral composition of the Raman scattered electromagnetic radiation, a detector for measuring the Raman scattered electromagnetic radiation; and a system for determining concentration of at least one chemical compound from the measured Raman scattered electromagnetic radiation. The apparatus may also comprise a radiation expanding element. A method for measuring the concentration of one or more chemical compounds in a sample using Raman scattering is also provided.
72 Citations
28 Claims
-
1. An apparatus for measurement of Raman scattered radiation comprising:
-
a) one or more than one source of electromagnetic radiation for producing an electromagnetic radiation beam characterized by a narrow spectral width;
b) an integrating cavity comprising;
(i) an interior and an exterior, wherein a sample is placed in said interior, said integrating cavity having one or more than one port for insertion of said sample in said interior and for transmission of said electromagnetic radiation into and out from said interior, said one or more than one port extending from said exterior to said interior of said integrating cavity, and (ii) a radiation expanding element for expanding said electromagnetic radiation before said electromagnetic radiation beam comes into contact with said sample;
c) a first optical element for transmitting said electromagnetic radiation into said interior of said integrating cavity through said one or more than one port;
d) a second optical element for collecting Raman scattered electromagnetic radiation from said sample through said one or more than one port;
e) a spectrum analyzer for determining spectral composition of said Raman scattered electromagnetic radiation;
f) a detector for measuring said Raman scattered electromagnetic radiation; and
g) a system for determining a concentration of one or more than one chemical compound in said sample from Raman scattered electromagnetic radiation measured by said detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. A method for measuring a concentration of one or more than one chemical compound in a sample using Raman scattering comprising:
-
a) placing said sample within an integrating cavity comprising;
i) an interior and an exterior, wherein a sample is placed in said interior of said integrating cavity, said integrating cavity having one or more than one port for insertion of said sample in said interior and for transmission of electromagnetic radiation into and out from said integrating cavity, said one or more than one port extending from said exterior to said interior of said integrating cavity, and ii) a radiation expanding element for expanding said electromagnetic radiation beam before said electromagnetic radiation comes into contact with said sample;
b) generating an electromagnetic radiation beam characterized by a narrow spectral width and transmitting said electromagnetic radiation into said integrating cavity;
c) directing said electromagnetic radiation beam through said integrating cavity so that before said electromagnetic radiation beam comes into contact with said sample an expanded beam having a specific radiation power density smaller than a predetermined tolerance limit for said sample is produced;
d) collecting Raman scattered electromagnetic radiation from said sample within said integrating cavity;
e) spectrally decomposing said Raman scattered electromagnetic radiation;
f) measuring said Raman scattered electromagnetic radiation; and
g) determining said concentration of said one or more than one chemical compound. - View Dependent Claims (24, 25, 26, 27)
-
-
28. An integrating cavity comprising:
-
a) an interior and an exterior, wherein a sample is placed in said interior of said integrating cavity, said integrating cavity having one or more than one port for insertion of said sample in said interior and for transmission of electromagnetic radiation into and out of said integrating cavity, said one or more than one port extending from said exterior to said interior of said integrating cavity, and b) a radiation expanding element for expanding said electromagnetic radiation before said electromagnetic radiation beam comes into contact with said sample.
-
Specification