Patent ID: 11954884
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC F  G  H

Claim 3:
4. The optical apparatus of claim 1, wherein:
the illumination unit includes a wavelength variable filter which is configured to change a selected wavelength through an electrical operation and a diffractive optical element which is configured to diffracts the first ray and the second ray emitted from the illumination unit; and
the illumination unit is configured to diffract the first ray having the first wavelength set as the selected wavelength by the diffractive optical element configured to emit the diffracted first ray in the first ray direction, and is configured to diffract the second ray having the second wavelength set as the selected wavelength by the diffractive optical element configured to emit the diffracted second ray in the second ray direction.