Patent ID: 9243955
Filing Date: 2016-01-26
CPC Classification: G01J,G01N,G02B

Claim Text:
1. A spectroscope comprising: a collimating optical system that causes light to be substantially collimated light; a spectroscopic optical system including at least one spectral element in which a wavelength band for spectral separation varies depending on an incident angle of the light, wherein the spectroscopic optical system comprises a first optical element that transmits a part of the incident light and reflects the rest thereof, and a second optical element that reflects at least part of the light reflected by the first optical element, and at least one of the first optical element and the second optical element is the spectral element in which the wavelength band for spectral separation varies depending on the incident angle of the light; at least one optical receiver that detects the light spectrally separated by the spectroscopic optical system; a mechanism that varies the incident angle of the light on the spectral element; and a controller unit that determines the incident angle of the light on the spectral element in accordance with the wavelength band for spectrally separating the light and controls the mechanism so as to attain the incident angle, wherein the controller unit further controls the mechanism to vary a direction of an incident surface of the first optical element and controls, in accordance with variation of the direction of the incident surface of the first optical element, the mechanism to vary a direction of an incident surface of the second optical element.