To promote the achievement of compactness and a thin type by a simple constitution and to simply and easily promote the achievement of multichannels.

An interference filter 12 to which observation light is guided is formed with spectral characteristics in which transmitted-wavelength bands are sequentially different from one another in one direction of the interference filter 12. The interference filter 12 is opposed to a photoelectric conversion element 13 in which pixels are two-dimensionally arrayed. The observation light is guided to the photoelectric conversion element 13 via the interference filter 12 to acquire electric signals, and signal processing is performed on the electric signals to create observation light data.