WAVELENGTH SELECTION SWITCH

摘要

A wavelength selection switch according to the invention includes an optical component 90 for adjusting an optical path with an image magnification of M that is provided between a second imaging position B and a mirror array 80. Therefore, it is possible to provide a small wavelength selection optical switch 301 with a short optical path length that is capable of reducing the focal length of each of a first lens 30 and a second lens 50 to 1/M while maintaining the structure of the spectral element, the fiber array, and the mirror array according to the related art. Since the optical path length is reduced, it is possible to reduce the number of reflecting mirrors used to convert an optical path and thus reduce the size of a housing. Therefore, it is possible to reduce manufacturing costs.