| 摘要 |
A spectroscope provided with a temperature compensation mechanism capable of positively reducing the drift in a wavelength direction of a spectrum image caused by changes in environmental temperature regardless of the configuration of a spectroscope, comprising a first member (17) for integrally supporting an incidence member (11), a condensing optical system (13) and a detection element (15), a second member (21) consisting of a material different in linear expansion coefficient from the first member, for supporting a wavelength dispersion element (14), and transmission members (24, 25) for transmitting the expansion/contraction of the first member to the second member when an environmental temperature changes. The second member includes a deforming member (28) that elastically deforms according to the difference between the expansions/contractions of itself and the first member, and a rotation member (26) finely rotating according to the elastic deformation of the deforming member. The wavelength dispersion element is attached to the rotation member with its wavelength dispersion direction kept perpendicular to the axial direction of the rotation member.
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