Patent ID: 8125638
Filing Date: 2012-02-28
Classification: G01J

Abstract:
1. A spectroscope comprising: a wavelength dispersion element which performs wavelength dispersion of measured light with; a light reception element which receives the light; a first compound lens which converts the incident measured light into parallel light and emits the parallel light to the wavelength dispersion element, the first compound lens including a plurality of lenses; a second compound lens which gathers the measured light subjected to the wavelength dispersion in the wavelength dispersion element and causes the light reception element to receive the light, the second compound lens including a plurality of lenses; and a base which fixes the wavelength dispersion element, the first compound lens, and the second compound lens, wherein the linear expansion coefficient of the compound focal length of said first compound lens, the linear expansion coefficient of the compound focal length of said second compound lens, and the linear expansion coefficient of a material forming said base are substantially equal.