Optical micro-spectrometer
First Claim
1. An optical spectrometer comprising:
- a first wafer;
a second wafer having a channel situated on the first wafer, the channel having a first portion and a second portion;
a light source situated at a first end of the first portion of the channel;
a reflector situated at a second end of the first portion of the channel and a first end of the second portion of the channel; and
a detector array situated at a second end of the second portion of the channel; and
wherein the light source, reflector and detector array are situated about a circumference of a circle in a plane; and
the light source is a micro discharge device.
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Accused Products
Abstract
An optical spectrometer having a multi-wafer structure. The structure may be fabricated with MEMS technology. The spectrometer may be integrated with a fluid analyzer. A reflective grating such as a diffraction or holographic grating situated on the circumference of a Rowland circle along with a point of light emission and a detector may be a configuration of the spectrometer. Some configurations may use an external light source where the light may be optically conveyed to the point of emission on the circle. There may be a Raman configuration where an interaction of light with a sample or an interactive film of a channel in a fluid analyzer is the point of light emission for the spectrometer. In some configurations of the spectrometer, the grating and/or the film may be reflective or transmissive.
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Citations
13 Claims
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1. An optical spectrometer comprising:
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a first wafer; a second wafer having a channel situated on the first wafer, the channel having a first portion and a second portion; a light source situated at a first end of the first portion of the channel; a reflector situated at a second end of the first portion of the channel and a first end of the second portion of the channel; and a detector array situated at a second end of the second portion of the channel; and wherein the light source, reflector and detector array are situated about a circumference of a circle in a plane; and the light source is a micro discharge device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A spectrometer comprising:
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a first wafer; a detector situated on the first wafer; a second wafer situated on the first wafer, having a first opening about the detector, and having a light source; a third wafer, situated on the second wafer, having a second opening approximately aligned with the first opening, and having a channel intersecting the first and second openings; and a fourth wafer situated on the third wafer, and having a reflector-grating situated proximate to the second opening; and wherein the light source is a micro discharge device. - View Dependent Claims (9, 10, 11, 12)
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13. A spectrometer comprising:
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a first wafer; a detector situated on the first wafer; a second wafer situated on the first wafer, having a first opening about the detector, and having a light source; a third wafer, situated on the second wafer, having a second opening approximately aligned with the first opening, and having a channel intersecting the first and second openings; and a fourth wafer situated on the third wafer, and having a reflector-grating situated proximate to the second opening; and wherein the light source is a micro discharge device; and the detector is a photo-detector.
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Specification