Abstract:
The invention relates to a spectrometer (20) comprising: means (22) for spectrally dispersing an initial light beam (240); and a photodetector (21). According to the invention, the spectrally dispersing means (22) comprise at least three reflective diffraction gratings (201, 202, 203) parallel to consecutive sides of a convex polygon (23), said sides being arranged so that a portion of the initial light beam (240) is diffracted alternately by each of the diffraction gratings (201, 202, 203) and is diffracted at least a second time by at least one of the diffraction gratings (201).
Abstract:
The present invention provides a spectral apparatus for spectrally separating light including a predetermined wavelength, including a slit that the light enters, a first optical system configured to collimate the light from the slit, a transmissive type diffraction element configured to diffract the light from the first optical system, and a second optical system including a first mirror configured to reflect the light diffracted by the transmissive type diffraction element, and a second mirror configured to reflect the light reflected by the first mirror and diffracted by the transmissive type diffraction element, and configured to make the light reciprocally travel between the first mirror and the second mirror via the transmissive type diffraction element.
Abstract:
Disclosed is a spectroscopic device that includes a light input unit to which light from a light source is input; optical elements; an optical deflection element; a reflector element that reflects the light emitted from the optical deflection element; and a photodetector. The optical deflection element includes a refractive index change region made of a material having an electro-optical effect and electrodes arranged to pinch the refractive index change region. The reflector element is a resonator filter having wavelength selectivity such that light having a predetermined wavelength is resonantly reflected.