Patent ID: 11940720
Assignee: RICOH COMPANY, LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 0:
1. An optical system comprising:
an optical modulation element to reflect and emit an incident light in a different direction; and
an illumination optical system through which light emitted from a light source is emitted toward the optical modulator,
wherein the illumination optical system includes a lens array and a lens disposed in an order listed from the light source to the optical modulator,
wherein the illumination optical system includes a shielding part disposed closer to the light source than the lens,
wherein the shielding part is configured to shield light incident on an effective diameter of the lens, and
wherein, in a direction perpendicular to an optical axis of the light emitted from the light source, the optical axis of the light emitted from the light source is shifted from a center position of the effective diameter of the lens in an opposite direction with reference to the shielding part.