Spectroscopic apparatus for extremely faint light
First Claim
1. Fourier spectroscopic apparatus of a spatial interferogram type for extremely faint light comprising:
- a first optical system dividing an extremely faint light from a photon emitting source into two different light beams;
a second optical system focusing interference fringes of the two different light beams; and
a detector detecting focused interference fringes, the detector is a two-dimensional photon counter capable of detecting photon receiving positions.
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Abstract
The present invention relates to a photo-counting Fourier spectroscopic apparatus which enables spectroscopic detection of extremely fine emission light seen in a living-body specimen or the like as bioluminescence, chemiluminescence, and fluoroescence from a living-body specimen. A light from a specimen which emits an extremely faint light is guided to an interferometer. A two-dimensional photon counter is used as an interference fringe detector. The two-dimensional photo counting device counts the number of incident photons to form an image. The obtained image is subjected to Fourier analysis to thereby obtain spectral information about the incident light. A double beam interferometer, a triangular common path interferometer, a Michelson interferometer and other interferometers are used.
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Citations
8 Claims
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1. Fourier spectroscopic apparatus of a spatial interferogram type for extremely faint light comprising:
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a first optical system dividing an extremely faint light from a photon emitting source into two different light beams; a second optical system focusing interference fringes of the two different light beams; and a detector detecting focused interference fringes, the detector is a two-dimensional photon counter capable of detecting photon receiving positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification