Optical device and prism module thereof
AssigneesSintai Optical (Shenzhen) Co., Ltd., Asia Optical Co., Inc.
InventorsHua-Tang Liu, Sheng Luo, Jun-Wei Che, Bin Liu
Life of this patent
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Abstract
An optical device and the prism module thereof are provided. The prism module includes a first prism, a second prism, a film and a light guide unit. The film is disposed between the first prism and the second prism. First visible light enters the first prism, passes through the film, enters the second prism, exits from the second prism, reaches the light guide unit, and is reflected to user's eyes by the light guide unit. Also, second visible light passes through the light guide and reaches user's eyes.
Claims20
A prism module, comprising:
- a first prism comprising a first surface, a second surface and a third surface wherein the second surface adjoins the first surface, and the third surface adjoins the second surface and is disposed opposite to the first surface;
- a second prism comprising a fourth surface, a fifth surface and a sixth surface wherein the fourth surface is disposed towards the first prism, the sixth surface adjoins the fourth surface, and the fifth surface adjoins the fourth surface and is disposed opposite to the sixth surface;
- a film disposed between the third surface and the fourth surface;
- a light guide unit comprising a seventh surface and an eighth surface;
- wherein first visible light enters the first prism through the first surface, is reflected on the second surface, sequentially passes through the third surface and the film, enters the second prism through the fourth surface, is reflected on the fifth surface, passes through the sixth surface, exits from the second prism, reaches the light guide unit, and is reflected on the seventh surface of the light guide unit;
- wherein second visible light enters the light guide unit through the eighth surface and exits from the light guide unit through the seventh surface.
A prism module, comprising:
- a first prism comprising a first surface, a second surface and a third surface wherein the second surface adjoins the first surface, and the third surface adjoins the second surface and is disposed opposite to the first surface;
- a second prism comprising a fourth surface, wherein the fourth surface is disposed towards the third surface of the first prism;
- a film disposed between the third surface and the fourth surface;
- wherein invisible light enters the first prism through the first surface, is reflected on the third surface and then on the second surface, and exits from the first prism through the first surface;
- wherein the invisible light is reflected back to the first prism by the film.
A prism module, comprising:
- a first prism comprising a first surface, a second surface and a third surface wherein the second surface adjoins the first surface, and the third surface adjoins the second surface and is disposed opposite to the first surface;
- a second prism comprising a fourth surface, wherein the fourth surface is disposed towards the third surface of the first prism;
- a film disposed between the third surface and the fourth surface;
- wherein invisible light is reflected to the prism module by a target object, enters the first prism through the first surface, is reflected on the second surface and then on the third surface, and exits from the first prism through the first surface;
- wherein the invisible light is reflected back to the first prism by the film.
Dependencies are inferred from the claim text.