Optical path structure for open path emissions sensing with spinning filter wheel
First Claim
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1. An optical system for a gas component analysis, comprising:
- a first emitter located on a first side of a vehicle path for emitting a first light beam having a first spectrum across the vehicle path;
a first receiver for receiving the first light beam; and
a spinning filter wheel that filters the beam from the first emitter before the beam crosses the vehicle path.
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Abstract
An optical system for a gas component analysis includes an emitter for emitting first light beam having a first spectrum, a second emitter for emitting a second light beam at a second spectrum, a first receiver for receiving the first light beam, and a second receiver for receiving the second light beam.
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Citations
23 Claims
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1. An optical system for a gas component analysis, comprising:
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a first emitter located on a first side of a vehicle path for emitting a first light beam having a first spectrum across the vehicle path;
a first receiver for receiving the first light beam; and
a spinning filter wheel that filters the beam from the first emitter before the beam crosses the vehicle path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22)
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21. An optical system for a gas component analysis, comprising:
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means located on a first side of a vehicle path for emitting a first light beam having a first spectrum across the vehicle path;
means for receiving the first light beam; and
spinning filter means for filtering the beam from the first emitter before the beam crosses the vehicle path.
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23. A method for gas component analysis, comprising the steps of:
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emitting a first light beam having a first spectrum across the vehicle path;
receiving the first light beam; and
filtering the beam from the first emitter before the beam crosses the vehicle path.
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Specification