Integrated optical component and method of making

Patent metadata

Field	Value
Publication number	US-10018850-B2
Application number	US-201415102765-A
Country	US
Kind code	B2
Filing date	Dec 11, 2014
Priority date	Dec 23, 2013
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

The present disclosure provides an integrated optical component array and method of making an integrated optical component array useful for projection devices or other optical devices. The integrated optical component array can be a PBS array fabricated such that the individual PBS cubes having several elements can be assembled in a massively parallel manner and then singulated as individual optical components, and can result in a large reduction in manufacturing cost.

First claim

What is claimed is:

1. An integrated optical component, comprising:
a support having a planar first surface and an opposing second surface, the opposing second surface comprising a plurality of stair steps, each of the plurality of stair steps having a tread and a riser that intersect to form a hinge proximate the planar first surface;
a polarizing beam splitter (PBS) cube disposed on each of the plurality of stair steps and integral with the support, the PBS cube comprising:
a first prism having a first prism surface adjacent the riser and a second prism surface adjacent the stair step;
a second prism having a third prism surface opposite the first surface and a fourth prism surface opposite the second surface; and
a reflective polarizer disposed on a diagonal surface between the first prism and the second prism, the reflective polarizer being parallel to the planar first surface of the support,

wherein the first prism surface is separated by a first trough from the riser, and the PBS cube includes opposing end faces orthogonal to the tread and to the riser.

2. The integrated optical component of claim 1 , wherein each tread includes at least two PBS cubes having end faces separated by a second trough.

3. The integrated optical component of claim 1 , wherein each second prism surface is separated from the adjacent tread by a prism extension.

4. The integrated optical component of claim 1 , further comprising a black coating disposed on at least one of the first prism surface, the third prism surface, the fourth prism surface, and the end face.

5. The integrated optical component of claim 1 , wherein at least one of the first prism surface, the third prism surface, the fourth prism surface, and the end face, comprises a polished surface.

6. The integrated optical component of claim 1 , wherein the third prism surface is adjacent a notch in the riser, the notch having a first notch surface parallel to the tread and a second notch surface adjacent the second prism surface and parallel to the riser.

7. The integrated optical component of claim 1 , wherein the tread and the riser of each stair step intersect at a 90 degree angle.

8. The integrated optical component of claim 1 , wherein the tread of each stair step is disposed at a 45 degree angle to the planar first surface.

9. The integrated optical component of claim 1 , wherein at least one of the support, the first prism, and the second prism comprises a heat stabilized acrylic.

10. The integrated optical component of claim 9 , wherein the heat stabilized acrylic has a retardance of less than 20 nm.

11. The integrated optical component of claim 1 , wherein the first prism surface is a back black coated surface, the second prism surface is a polished light input surface, the third prism surface is a polished output surface, and the fourth prism surface comprises a polished aperture suitable for a liquid crystal on silicon (LCoS) imager.

12. An integrated optical component, comprising:
a support having a planar first surface and an opposing second surface, the opposing second surface comprising a plurality of stair steps, each of the plurality of stair steps having a tread and a riser that intersect to form a hinge proximate the planar first surface;
a plurality of polarizing beam splitter (PBS) cubes integral with the support and disposed in a line on each of the plurality of stair steps, each of the plurality of PBS cubes comprising:
a first prism having a first prism surface adjacent the riser and a second prism surface adjacent the stair step;
a second prism having a third prism surface opposite the first surface and a fourth prism surface opposite the second surface;
a reflective polarizer disposed on a diagonal surface between the first prism and the second prism, the reflective polarizer being parallel to the planar first surface of the support; and
opposing end faces, each opposing end face orthogonal to the reflective polarizer,

wherein each first prism surface is separated by a first trough from the riser, and a second trough separates adjacent PBS cubes on the riser.

13. The integrated optical component of claim 12 , wherein each second prism surface is separated from the adjacent tread by a prism extension.

14. The integrated optical component of claim 12 , further comprising a black coating disposed on at least one of the first prism surface, the third prism surface, the fourth prism surface, and the end face.

15. The integrated optical component of claim 12 , wherein at least one of the first prism surface, the third prism surface, the fourth prism surface, and the end face, comprises a polished surface.

16. The integrated optical component of claim 12 , wherein the third prism surface is adjacent a notch in the riser, the notch having a first notch surface parallel to the tread and a second notch surface adjacent the second prism surface and parallel to the riser.

17. The integrated optical component of claim 12 , wherein the tread and the riser of each stair step intersect at a 90 degree angle.

18. The integrated optical component of claim 12 , wherein the tread of each stair step is disposed at a 45 degree angle to the planar first surface.

19. The integrated optical component of claim 12 , wherein at least one of the support, the first prism, and the second prism comprise a heat stabilized acrylic.

20. The integrated optical component of claim 19 , wherein the heat stabilized acrylic has a retardance of less than 20 nm.

21. The integrated optical component of claim 12 , wherein the first prism surface is a back black coated surface, the second prism surface is a polished light input surface, the third prism surface is a polished output surface, and the fourth prism surface comprises a polished aperture suitable for a liquid crystal on silicon (LCoS) imager.

22. The integrated optical component of claim 12 , wherein the reflective polarizer is adhered between the first prism and the second prism using a radiation cured adhesive.

23. The integrated optical component of claim 22 , wherein the radiation cured adhesive is cured by ultraviolet radiation.

24. An integrated optical component, comprising:
a support having a planar first surface and an opposing second surface comprising
a stair step having a tread and a riser;

a plurality of polarizing beam splitter (PBS) cubes integral with the support and disposed in a line on the stair step, each of the plurality of PBS cubes comprising:
a first prism having a first prism surface adjacent the riser and a second prism surface adjacent the stair step;
a second prism having a third prism surface opposite the first surface and a fourth prism surface opposite the second surface;
a reflective polarizer disposed on a diagonal surface between the first prism and the second prism, the reflective polarizer being parallel to the planar first surface of the support; and
opposing end faces, each opposing end face orthogonal to the reflective polarizer,

wherein each first prism surface is separated by a first trough from the riser, and a second trough separates adjacent PBS cubes on the riser.

25. The integrated optical component of claim 24 , wherein each second prism surface is separated from the adjacent tread by a prism extension.

26. The integrated optical component of claim 24 , further comprising a black coating disposed on at least one of the first prism surface, the thi

Assignees

• 3M Innovative Properties Co

Inventors

• Le John D
• Ouderkirk Andrew J
• Carls Joseph C
• Murray Cameron T
• Ferguson Richard J
• Barum Cory C

Classifications

• G02B27/285 Primary

  comprising arrays of elements, e.g. microprisms · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02B1/10

  Optical coatings produced by application to, or surface treatment of, optical elements (G02B1/08 takes precedence) · CPC title

• G02F1/133536

  Reflective polarizers (G02F1/13362 takes precedence) · CPC title

• G02F2001/13355

  Physics · mapped topic