LIGHT DETECTION DEVICE AND LIGHT DETECTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To easily expand a variable range of selected wavelength without enlarging a size of a device.

SOLUTION: A spectroscopic device 1 comprises: four band pass filters 11a-11d through which light L2 from a light source is selectively transmitted in a wavelength range in accordance with an incidence angle of the light L2; and a flat rotary table 10 on which the band pass filters 11a-11d are erected on a main face 10a and which are rotatable around a rotation center C1along the main face 10a. The four band pass filters 11a-11d are disposed so that light incidence faces 12 or light exit faces 13 are inclined relative to lines connecting the rotation center C1on the main face 10a of the rotary table 10 and center points 15a-15d of the band pass filters 11a-11d on the main face 10a, respectively.

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