Virtual image display device and optical unit
AssigneeSeiko Epson Corporation
InventorAtsushi SAITO
Life of this patent
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Abstract
A virtual image display device includes an imaging light generation device generating an imaging light, a transmission inclined mirror configured to reflect the imaging light, and a concave transmission mirror including: a partial reflection film reflecting the imaging light reflected transmission inclined mirror, and a reflection type diffraction layer being disposed on opposite to the reflection film. In the reflection type diffraction layer diffracts the imaging light in a direction that is different from a direction in which the reflection film reflects the imaging light.
Claims14
A virtual image display device comprising:
- an imaging light generation device configured to generate an imaging light;
- a first mirror configured to reflect the imaging light from the imaging light generation device;
- and
- a second mirror configured to have a concave shape, the second mirror includes:
- a reflection film that reflects a part of the imaging light and that transmits other part of the imaging light, the reflection film that reflects the imaging light reflected the first mirror reflects, and
- a reflection type diffraction layer that is disposed on opposite to the reflection film,
- wherein
- the reflection type diffraction layer diffracts the imaging light in a direction that is different from a direction in which the reflection film reflects the imaging light.
An optical unit comprising:
- a first mirror configured to reflect an imaging light;
- and
- a second mirror configured to have a concave shape, the second mirror includes:
- a reflection film that reflects a part of the imaging light and that transmits other part of the imaging light, the reflection film that reflects the imaging light reflected the first mirror, and
- a reflection type diffraction layer that is disposed on opposite to the reflection film,
- wherein
- the reflection type diffraction layer diffracts the imaging light in a direction that is different from a direction in which the reflection film reflects the imaging light.
Dependencies are inferred from the claim text.