Optical path turning module

Patent metadata

Field	Value
Publication number	US-10890752-B2
Application number	US-201816226948-A
Country	US
Kind code	B2
Filing date	Dec 20, 2018
Priority date	Feb 7, 2018
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

An optical path turning module includes an optical path turning unit, a carrier, a fixing element and a driver. The optical path turning unit includes a sloping surface. A light beam enters the optical path turning unit along a first axis, is reflected by the sloping surface, and leaves the optical path turning unit along a second axis. The carrier is configured to fix the optical path turning unit and includes a main body and a plurality of first clamping portions. The main body is sloped with respect to the second axis, and the first clamping portions extend from the main body in a direction parallel to the second axis. The carrier is disposed in the fixing element. The driver is configured to drive the carrier to rotate about a third axis with respect to fixing element. The third axis is perpendicular to the first axis and the second axis.

First claim

What is claimed is:

1. An optical path turning module, comprising:
an optical path turning unit comprising a sloping surface, wherein a light beam enters the optical path turning unit along a first axis, is reflected by the sloping surface for changing a traveling direction thereof, and leaves the optical path turning unit along a second axis;
a carrier configured to fix the optical path turning unit and comprising a main body, a plurality of first clamping portions and a plurality of second clamping portions, wherein the main body is sloped with respect to the second axis, the first clamping portions extend forwards from two sides of the main body in a direction parallel to the second axis, and the second clamping portions extend obliquely and upwards from two sides of the main body and clamp the optical path turning unit;
a fixing element, with the carrier disposed therein; and
a driver disposed between the carrier and the fixing element and configured to drive the carrier to rotate about a third axis with respect to fixing element, wherein the third axis is perpendicular to the first axis and the second axis.

2. The optical path turning module as claimed in claim 1 , wherein the carrier further comprises a plurality of locating portions extending outwards from two sides of the main body in a direction parallel to the third axis.

3. The optical path turning module as claimed in claim 2 , wherein the optical path turning unit further comprises a top surface, a left surface, a right surface and a front surface;
wherein the first clamping portions comprise a plurality of first parts and a plurality of second parts, the first parts clamp the left surface and the right surface, and the second parts are placed against the front surface;
wherein the second clamping portions clamp the left surface and the right surface.

4. The optical path turning module as claimed in claim 3 , wherein the locating portions comprise a supporting portion and a pivoting portion, the supporting portion extends outwards from the main body, and the pivoting portion extends obliquely and downwards from a center of a bottom surface of the supporting portion.

5. The optical path turning module as claimed in claim 4 , wherein the fixing element comprises a plurality of fixing bodies, each of the fixing bodies is provided with a recess configured to accommodate the locating portion and comprising two supporting surfaces, a space and two limiting portions, the supporting surfaces are configured to support the supporting portion, the space is between the supporting surfaces and is configured to allow rotation of the pivoting portion, and the limiting portions are disposed obliquely above the supporting surfaces and are placed against a part of a top surface of the second clamping portion.

6. The optical path turning module as claimed in claim 3 , further comprising a plurality of enhancing elements, wherein each of the enhancing elements comprises a top part and a lateral part, the top part is disposed on the top surface and is connected to the lateral part, and the lateral part is fixed on the left surface or the right surface and extends to a top surface of the first clamping portions.

7. The optical path turning module as claimed in claim 6 , wherein each of the lateral parts is provided with a notch configured to engage with the second clamping portion, and an internal edge of the notch contacts at least one part of outer surfaces of the second clamping portion.

8. The optical path turning module as claimed in claim 7 , wherein the top parts of the enhancing elements are arranged in a non-effective-diameter area of the top surface.

9. The optical path turning module as claimed in claim 6 , wherein the left surface and the right surface of the optical path turning unit are completely covered by the lateral parts, the second clamping portions and the first parts of the first clamping portions.

10. The optical path turning module as claimed in claim 9 , wherein a bottom edge of the enhancing elements is arranged to contact a top surface of the first parts of the first clamping portions.

11. The optical path turning module as claimed in claim 3 , wherein the optical path turning unit further comprises a reflecting element and an adhesive layer, the adhesive layer is between the reflecting element and the sloping surface, and the sloping surface, the adhesive layer and the reflecting element are sequentially arranged.

12. The optical path turning module as claimed in claim 11 , wherein the optical path turning unit further comprises a reflecting layer coating on the reflecting element, and the reflecting layer is reflecting film.

13. The optical path turning module as claimed in claim 12 , wherein a first angle at which the top surface and the front surface are intersected is greater than a second angle at which the sloping surface and the top surface or the front surface are intersected.

14. The optical path turning module as claimed in claim 12 , wherein the reflecting element is glass sheet, a surface of the reflecting element facing the sloping surface is attached to the sloping surface through the adhesive layer, and another surface of the reflecting element opposite to the sloping surface is coated with the reflecting layer.

15. The optical path turning module as claimed in claim 14 , wherein the light beam enters the optical path turning unit through the top surface, passes through the sloping surface, the adhesive layer and the reflecting element, is reflected by the reflecting layer for changing the optical path thereof, passes through the reflecting element, the adhesive layer and the sloping surface again, and leaves the optical path turning unit through the front surface.

16. The optical path turning module as claimed in claim 12 , wherein the reflecting element is metal sheet, a surface of the reflecting element facing the sloping surface is coated with the reflecting layer, and the reflecting layer is attached to the sloping surface through the adhesive layer.

17. The optical path turning module as claimed in claim 16 , wherein the light beam enters the optical path turning unit through the top surface, passes through the sloping surface and the adhesive layer, is mostly reflected by the reflecting layer for changing the optical path thereof, passes through the adhesive layer and the sloping surface again, and leaves the optical path turning unit through the front surface;
wherein a minority of the light beam passes through the reflecting layer, is reflected by the reflecting element for changing the optical path thereof, passes through the reflecting layer, the adhesive layer and the sloping surface again, and leaves the optical path turning unit through the front surface.

18. The optical path turning module as claimed in claim 1 , wherein the second clamping portions comprise a first part, a second part and a third part, the first part extends obliquely and upwards from the main body, and the second part and the third part respectively extend vertically from two ends of the first part;
wherein the carrier further comprises a plurality of locating portions extending outwards from two sides of the main body in a direction parallel to the third axis, the locating portions comprise a supporting portion and a pivoting portion, the supporting portion extends outwards from the main body, and the pivoting portion extends obliquely and downwards from a center of a bottom surface of the supporting portion;
wherein the fixing element comprises a plurality of fixing bodies, each of the fixing bod

Assignees

• Sintai Optical Shenzhen Co Ltd
• Asia Optical Co Inc

Inventors

• LIN Guo-quan

Classifications

• G02B13/0065 Primary

  having a beam-folding prism or mirror · CPC title

• G02B23/2407

  Optical details · CPC title

• G02B7/1805

  for prisms (G02B7/181 takes precedence) · CPC title

• G02B23/08 Primary

  Periscopes {(arrangements on floating structures of underwater viewing devices B63C11/49; arrangement of visual watch equipment on submarines B63G8/38)} · CPC title

• G02B26/0816

  by means of one or more reflecting elements · CPC title