Binocular capable of measuring distance and prism module thereof

Patent metadata

Field	Value
Publication number	US-10520717-B2
Application number	US-201715397964-A
Country	US
Kind code	B2
Filing date	Jan 4, 2017
Priority date	Mar 22, 2016
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

A prism module includes a first prism including a first surface, a second surface and a third surface, a roof prism including a roof surface and a fourth surface, a second prism including a fifth surface, a sixth surface and a seventh surface, and a third prism including a light access surface, a first reflecting surface and a second reflecting surface. A light source is disposed above the second prism and adjacent to the first and the roof prisms. A light beam emitted by the light source enters and is reflected by the third prism, enters the second prism through the seventh surface, passes through the sixth surface, enters the first prism through the third surface, and is reflected by the second surface to leave the prism module. The light beam leaving the prism module is parallel to a baseline passing through the first, the second and the fourth surfaces.

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;
a roof prism comprising a roof surface and a fourth surface adjacent to the second surface;
a second prism comprising a fifth surface, a sixth surface adjacent to the third surface, and a seventh surface; and
a third prism disposed higher than the second prism;
wherein the third prism comprises a light access surface, a first reflecting surface and a second reflecting surface, and the light access surface is partly adjacent to the seventh surface;
wherein a baseline is configured to pass through the first and the second surfaces of the first prism and the fourth surface of the roof prism;
wherein a light source is disposed above the second prism, near a side of the third prism, and adjacent to the first and the roof prisms;
wherein the light source is configured to emit a first light beam;
wherein the first light beam enters the third prism, is reflected by the third prism, enters the second prism through the seventh surface, passes through the sixth surface of the second prism, enters the first prism through the third surface, is reflected by the second surface of the first prism, and leaves the prism module;
wherein the first light beam leaving the prism module is parallel to the baseline.

2. The prism module as claimed in claim 1 , wherein the first light beam enters the third prism through the light access surface, and is reflected by the first and the second reflecting surfaces to enter the second prism through the light access surface.

3. The prism module as claimed in claim 1 , wherein the first prism further comprises a coating disposed on the second surface, and the first light beam is reflected by the coating to leave the prism module.

4. The prism module as claimed in claim 1 , wherein a visible light beam enters the first prism through the first surface, is reflected a plurality of times in the first prism, leaves the first prism through the second surface, enters the roof prism through the fourth surface, is reflected a plurality of times in the roof prism, and leaves the prism module, and the visible light beam leaving the prism module is parallel to the baseline.

5. The prism module as claimed in claim 1 , wherein a second light beam comprising an image enters the second prism through the fifth surface, leaves the second prism through the sixth surface, passes through the first prism, enters the roof prism, is reflected by the roof prism and the fourth surface, and leaves the prism module in a direction parallel to the baseline.

6. The prism module as claimed in claim 1 , wherein the first prism further comprises a coating disposed on the second surface, and the coating is configured to reflect an invisible light beam and allow a visible light beam to pass through.

7. A binocular capable of measuring distance comprising:
a first optical system; and
a second optical system arranged parallel to the first optical system;
wherein the first optical system comprises an objective module, the prism module as claimed in claim 1 , and an ocular module;
wherein the second optical system comprises a light receiver;
wherein the first light beam emitted by the light source passes through the third prism, the prism module and the objective module, is projected to an object, is reflected by the object to the second optical system, and is received by the light receiver.

8. The prism module as claimed in claim 7 , wherein the first prism further comprises a coating disposed on the second surface, and the coating is configured to reflect an invisible light beam and allow a visible light beam to pass through.

9. A prism module, comprising:
a first prism comprising a first surface, a second surface and a third surface;
a roof prism comprising a roof surface and a fourth surface adjacent to the second surface;
a second prism comprising a fifth surface, a sixth surface adjacent to the third surface, and a seventh surface; and
a third prism disposed higher than the second prism;
wherein the third prism comprises a light access surface, a first reflecting surface and a second reflecting surface, and the light access surface is partly adjacent to the seventh surface;
wherein a baseline is configured to pass through the first and the second surfaces of the first prism and the fourth surface of the roof prism;
wherein a light receiver is disposed above the second prism, near a side of the third prism, and adjacent to the first and the roof prisms;
wherein a first light beam parallel to the baseline enters the first surface of the first prism, is reflected by the first prism, enters the second prism through the third surface, passes through the seventh surface of the second prism, enters the third prism through the light access surface, and is reflected by the third prism to leave the prism module through the light access surface.

10. The prism module as claimed in claim 9 , wherein the first light beam enters the third prism through the light access surface, and is reflected by the first and the second reflecting surface to enter the light receiver through the light access surface.

11. The prism module as claimed in claim 9 , wherein the first prism further comprises a coating disposed on the second surface, and the first light beam is reflected by the coating to leave the prism module.

12. The prism module as claimed in claim 9 , wherein a visible light beam enters the first prism through the first surface, is reflected a plurality of times in the first prism, leaves the first prism through the second surface, enters the roof prism through the fourth surface, is reflected a plurality of times in the roof prism, and leaves the prism module, and the visible light beam leaving the prism module is parallel to the baseline.

13. The prism module as claimed in claim 9 , wherein a second light beam comprising an image enters the second prism through the fifth surface, leaves the second prism through the sixth surface, passes through the first prism, enters the roof prism, is reflected by the roof prism and the fourth surface, and leaves the prism module in a direction parallel to the baseline.

14. The prism module as claimed in claim 9 , wherein the first prism further comprises a coating disposed on the second surface, and the coating is configured to reflect an invisible light beam and allow a visible light beam to pass through.

15. The prism module as claimed in claim 14 , wherein a visible light beam enters the first prism through the first surface, is reflected a plurality of times in the first prism, leaves the first prism through the second surface, enters the roof prism through the fourth surface, is reflected a plurality of times in the roof prism, and leaves the prism module, and the visible light beam leaving the prism module is parallel to the baseline.

16. The prism module as claimed in claim 14 , wherein a second light beam comprising an image enters the second prism through the fifth surface, leaves the second prism through the sixth surface, passes through the first prism, enters the roof prism, is reflected by the roof prism and the fourth surface, and leaves the prism module in a direction parallel to the baseline.

17. A binocular capable of measuring distance comprising:
a first optical system; and
a second optical system arranged parallel to the first optical system;
wherein the second optical system comprises an objective module, the prism module as claimed in claim 9 , and an ocular module;
wherein the first optical syst

Assignees

• Sintai Optical Shenzhen Co Ltd
• Asia Optical Co Inc

Inventors

• Chen Yue-Ye
• Liu Hua-Tang
• Gao zhi-wei
• Luo Sheng
• Chen jian-mei
• Zhou Ming

Classifications

• G02B5/04

  Prisms · CPC title

• G02B23/18

  for binocular arrangements {(focusing binocular pairs G02B7/06; adjusting pupillary distance of binocular pairs G02B7/12)} · CPC title

• G02B5/208

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title

• G01S17/08 Primary

  for measuring distance only (indirect measurement G01S17/46; active triangulation systems G01S17/48) · CPC title

• G02B23/10 Primary

  reflecting into the field of view additional indications, e.g. from collimator · CPC title