Optical device and prism module thereof

Patent metadata

Field	Value
Publication number	US-2024231069-A9
Application number	US-202318490812-A
Country	US
Kind code	A9
Filing date	Oct 20, 2023
Priority date	Oct 24, 2022
Publication date	Jul 11, 2024
Grant date	—

Abstract

An optical device and the prism module thereof are provided. The prism module includes a first prism, a second prism, and a third prism. The second prism is disposed beside the first prism. The third prism is adhered to the second prism. First light enters the first prism, is reflected plural times in the first prism, enters the second prism, and is emitted from the second prism. Second light enters the second prism, is reflected plural times in the second prism, and is emitted from the second prism. Third light sequentially passes through the third prism and the second prism, enters the first prism, is reflected plural times in the first prism, and is emitted from the first prism.

First claim

What is claimed is:

1 . A prism module, comprising:
a first prism comprising a first surface, a second surface and a third surface connected to each other; a second prism comprising a first part and a second part; wherein the first part comprises a fourth surface, a fifth surface and a sixth surface connected to each other, the fourth surface is disposed towards the second surface, and the fifth surface is disposed opposite to the fourth surface; wherein the second part comprises a seventh surface, an eighth surface and a ninth surface connected to each other, the seventh surface is disposed towards the sixth surface, and the eighth surface is disposed opposite to the seventh surface; wherein first light enters the first prism through the first surface, is sequentially reflected on the second surface, the third surface and the first surface, exits from the second surface of the first prism, enters the second prism through the fourth surface, is sequentially reflected on the fifth surface and the fourth surface, sequentially passes through the sixth surface and the seventh surface, and exits from the eighth surface of the second prism; wherein second light enters the second prism through the ninth surface, is sequentially reflected on the eighth surface and the seventh surface, and exits from the eighth surface of the second prism; wherein except for the second prism the second light does not pass through any prism; wherein the second light traveling inside the second prism is reflected exactly two times.

2 . The prism module as claimed in claim 1 , further comprising a film, wherein the film is disposed adjacent to the fifth surface, the first light is visible light, the film is configured to reflect the first light, and the first light and the second light overlap when exiting from the eighth surface of the second prism.

3 . An optical device, comprising:
the prism module as claimed in claim 2 ; a display configured to generate the second light that is visible light; an object lens unit wherein the first light entering the optical device passes through the object lens unit and enters the first prism through the first surface; an eyepiece unit wherein the first light and the second light exiting from the eighth surface of the second prism pass through the eyepiece unit and exit from the optical device.

4 . An optical device, comprising:
the prism module as claimed in claim 1 ; a display configured to generate the second light that is visible light; an object lens unit wherein the first light entering the optical device passes through the object lens unit and enters the first prism through the first surface; an eyepiece unit wherein the first light and the second light exiting from the eighth surface of the second prism pass through the eyepiece unit and exit from the optical device.

5 . A prism module, comprising:
a first prism comprising a first surface, a second surface and a third surface connected to each other; a second prism comprising a first part and a second part; a third prism comprising a tenth surface, an eleventh surface and a twelfth surface connected to each other; wherein the first part comprises a fourth surface, a fifth surface and a sixth surface connected to each other wherein the fourth surface is disposed towards the second surface and the fifth surface is disposed opposite to the fourth surface; wherein the second part comprises a seventh surface, an eighth surface and a ninth surface connected to each other, the seventh surface is disposed towards the sixth surface, and the eighth surface is disposed opposite to the seventh surface; wherein second light enters the second prism through the ninth surface, is sequentially reflected on the eighth surface and the seventh surface, and exits from the eighth surface of the second prism; wherein third light enters the third prism through the twelfth surface, is reflected on the eleventh surface, passes through the tenth surface, enters the second prism through the fifth surface, exits from the fourth surface of the second prism, enters the first prism through the second surface, is sequentially reflected on the first surface, the third surface and the second surface of the first prism, and exits from the first surface of the first prism.

6 . The prism module as claimed in claim 5 , further comprising a film disposed between the fifth surface and the tenth surface, wherein the third light is invisible light, and the film is configured to allow the third light to pass through.

7 . An optical device, comprising:
the prism module as claimed in claim 6 ; a light emitter configured to generate the third light which passes through the prism module and reaches a target object; a light receiver configured to receive the third light after the third light is reflected by the target object.

8 . An optical device, comprising:
the prism module as claimed in claim 5 ; a light emitter configured to generate the third light which passes through the prism module and reaches a target object; a light receiver configured to receive the third light after the third light is reflected by the target object.

9 . A prism module, comprising:
a film; a first prism comprising a first surface, a second surface and a third surface connected to each other; a second prism comprising a first part and a second part; a third prism comprising a tenth surface, an eleventh surface and a twelfth surface connected to each other; wherein the first part comprises a fourth surface, a fifth surface and a sixth surface connected to each other wherein the fourth surface is disposed towards the second surface and the fifth surface is disposed opposite to the fourth surface; wherein the second part comprises a seventh surface, an eighth surface and a ninth surface connected to each other, the seventh surface is disposed towards the sixth surface, and the eighth surface is disposed opposite to the seventh surface; wherein second light enters the second prism through the ninth surface, is sequentially reflected on the eighth surface and the seventh surface, and exits from the eighth surface of the second prism; wherein third light is reflected by a target object, enters the first prism through the first surface, is sequentially reflected on the second surface, the third surface and the first surface, exits from the second surface of the first prism, enters the second prism through the fourth surface, exits from the fifth surface of the second prism, enters the third prism through the tenth surface, is reflected on the eleventh surface, and exits from the twelfth surface of the third prism; wherein the film is disposed between the fifth surface and the tenth surface, allowing the third light to pass through.

10 . An optical device, comprising:
the prism module as claimed in claim 9 ; a light emitter configured to generate the third light which reaches a target object; a light receiver configured to receive the third light after the third light is reflected by the target object and passes through the prism module.

11 . A prism module, comprising:
a first prism comprising a first surface, a second surface and a third surface connected to each other; a second prism comprising a first part and a second part; a third prism comprising a tenth surface, an eleventh surface and a twelfth surface connected to each other; wherein the first part comprises a fourth surface, a fifth surface and a sixth surface connected to each other wherein the fourth surface is disposed towards the second surface and the fifth surface is disposed opposite to the fourth surface; wherein the second part comprises a seventh surface

Assignees

• Sintai Optical Shenzhen Co Ltd
• Asia Optical Co Inc

Inventors

• Han Fei
• Zhang Xiao-Yao
• Chen Yue-Ye
• Zhao Ling-Wei
• Che Jun-Wei
• Liu Hua-Tang

Classifications

• G02B5/04

  Prisms · CPC title

• G02B23/02 Primary

  involving prisms or mirrors (G02B23/14 takes precedence) · CPC title

• G02B23/04

  for the purpose of beam splitting or combining, e.g. fitted with eyepieces for more than one observer (G02B23/10 takes precedence) · CPC title