Reflective spatial light modulator, optical observation device and optical irradiation device

A reflective spatial light modulator for modulating input light and outputting modulated light that has been subjected to modulation, the reflective spatial light modulator comprising:

• a perovskite-type electro-optic crystal having a relative permittivity of 1,000 or higher and including an input surface to which the input light is input and a rear surface which faces the input surface;
• a light input and output unit disposed on the input surface of the electro-optic crystal and including a first electrode through which the input light is transmitted;
• a light reflecting unit including a pixel electrode portion including a plurality of second electrodes and an adhesion layer fixing the pixel electrode portion to the rear surface, is disposed on the rear surface of the electro-optic crystal, and reflects the input light toward the light input and output unit;
• and
• a drive circuit configured to apply an electric field between the first electrode and the plurality of second electrodes,
• wherein the adhesion layer includes a dielectric material in a cured material of a non-conducting adhesive material.