Image pickup device including an infrared-ray cut filter

摘要

A photographic light is spectrally separated by a spectral prism 9 provided in an image-formation area R of the photographic light whose luminous flux is adjusted by a group of lenses 1 a- 1 d for adjusting the luminous flux so as to image-form the photographic light. Respective lights spectrally separated by the spectral prism 9 are imaged by means of the imaging elements 2 . An infrared-ray element of the photographic light whose luminous flux is being adjusted is eliminated by an infrared-ray cut filter 8 . The infrared-ray cut filter 8 is advanced and retreated by a mechanism unit 14 a between a position in an optica path of the photographic light and a position distant from the optical path. In the foregoing constitution, the infrared-ray cut filter 8 and the mechanism unit 14 a are disposed in a luminous flux convergence area R of the photographic light whose luminous flux is being adjusted by the group of lenses 1 a- 1 d.