Patent ID: 11947105
Assignee: FUJIFILM CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A projection apparatus comprising:
a processor;
an irradiation portion that performs irradiation with light;
a light modulation element that modulates the light from the irradiation portion;
a plurality of reflective portions that reflect an optical image modulated by the light modulation element; and
a projection optical system that projects the optical image reflected by the plurality of reflective portions to a projection surface,
wherein the plurality of reflective portions are arranged between the light modulation element and the projection optical system,
wherein the processor is configured to perform a control of changing a position of a projection range of the optical image by displacing at least one of the plurality of reflective portions, and
wherein the processor is configured to perform the control such that an air-equivalent length of a path of the optical image between the light modulation element and the projection optical system has a specific value.