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US 11,768,370 B2Granted
Projector, display system, and mobile object
AssigneeRicoh Company, Ltd.
InventorsYuuki Satoh, Kazuhiro Fujita
Life of this patent
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Abstract
A projector includes an image forming unit configured to emit image light that forms an image and an imaging optical system configured to form an image by reflecting the image light. S magnification power at a point of the imaging optical system where the image light is incident and optical-path length between the image forming unit and the imaging optical system is short is made higher than a magnification power at a point of the imaging optical system where the image light is incident and the optical-path length between the image forming unit and the imaging optical system is long.
Claims6
A projector comprising:
- an image forming system to emit image light that forms an image on a screen;
- and
- an imaging optical system to reflect the image light to form a virtual image,
- wherein an optical axis in a direction normal to the screen of the image forming system is decentered with respect to a direction normal to a center of the imaging optical system so that an optical-path length between the image forming system and an edge of the imaging optical system is shorter than another optical-path length between the image forming system and another edge of the imaging optical system,
- wherein a magnification power at the edge of the imaging optical system is higher than a magnification power at the another edge of the imaging optical system.
2 more elements
Dependencies are inferred from the claim text.