Optical assembly and method of making same
View Patent ↗An optical assembly includes a first transparent substrate having first and second surfaces, a second transparent substrate having substantially parallel third and fourth surfaces, a reflective portion on the second transparent substrate, a plurality of filters between the first substrate and the reflective portion, the plurality of filters filtering light beams incident thereon, the plurality of filters and the reflective portion forming a bounce cavity within the second transparent substrate, a collimating lens for collimating light beams to be input to the bounce cavity, a tilt mechanism for introducing tilt to light beams input to the bounce cavity; an input port receiving light beams and an output port transmitting light beams. The tilt mechanism may be between the first and second substrate.
1. An optical assembly, comprising:
a transparent substrate having substantially parallel first and second surfaces;
a reflective portion on the transparent substrate;
a plurality of filters filtering light beams incident thereon, the plurality of filters and the reflective portion forming a bounce cavity within the transparent substrate;
an alignment mechanism accurately aligning the plurality of filters to a predetermined angle relative to the reflective portion, the alignment mechanism including, for each filter of the plurality of filters, a standoff between the filter and a mount surface, the standoff contacting only a portion of the filter; and
a tilt mechanism for introducing tilt to the light beams input to the bounce cavity.
2. The optical assembly as claimed in claim 1 , wherein the stand-offs are the tilt mechanism.
3. The optical assembly as claimed in claim 1 , wherein the standoffs include at least two stand-offs formed in positions and heights in order to set the alignment of the filter to a pre-determined value.
4. The optical assembly as claimed in claim 1 , further comprising:
a collimating lens for collimating light beams to be input to the bounce cavity.
5. The optical assembly as claimed in claim 1 , wherein the standoffs include a plurality of lithographs.
6. The optical assembly as claimed in claim 1 , wherein the tilt mechanism includes a plurality of prisms.
7. The optical assembly as claimed in claim 1 , further comprising a diffractive lens on a surface on which the plurality of filters is secured.
8. The optical assembly as claimed in claim 7 , further comprising an adhesive material filling the diffractive lens and securing the plurality of filters.
9. The optical assembly as claimed in claim 1 , wherein the tilt mechanism includes a plurality of diffractive elements.
10. The optical assembly as claimed in claim 1 , wherein the tilt mechanism includes a sloped surface.
11. An optical assembly, comprising:
a transparent substrate having substantially parallel first and second surfaces;
a reflective portion on the transparent substrate;
a plurality of filters filtering light beams incident thereon, the plurality of filters and the reflective portion forming a bounce cavity within the transparent substrate;
an alignment mechanism accurately aligning the plurality of filters to a predetermined angle relative to the reflective portion;
a tilt mechanism for introducing tilt to the light beams input to the bounce cavity; and
a collimating lens for collimating light beams to be input to the bounce cavity.
12. The optical assembly as claimed in claim 1 , wherein the predetermined angle is substantially zero.
13. The optical assembly as claimed in claim 1 , wherein the predetermined angle is greater than zero.
14. An optical assembly, comprising:
a transparent substrate having substantially parallel first and second surfaces;
a reflective portion on the transparent substrate;
a plurality of filters filtering light beams incident thereon, the plurality of filters and the reflective portion forming a bounce cavity within the transparent substrate;
a mechanism accurately aligning the plurality of filters to a predetermined angle relative to the reflective portion; and
a plurality of lithographs introducing tilt to the light beams input to the bounce cavity.
15. The optical assembly as claimed in claim 14 , wherein the lithographs are diffractive elements.
16. The optical assembly as claimed in claim 15 , wherein the diffractive elements are on a surface on which the plurality of filters is secured.
17. The optical assembly as claimed in claim 16 , further comprising an adhesive material filling the diffractive elements and securing the plurality of filters.
18. The optical assembly as claimed in claim 14 , further comprising a collimating lens for collimating light beams to be input to the bounce cavity.
19. The optical assembly as claimed in claim 11 , wherein the alignment mechanism includes at least one filter of the plurality of filters integrated onto a surface of one of the first and second substrates.
20. The optical assembly as claimed in claim 11 , wherein the tilt mechanism includes a plurality of lithographs.
21. The optical assembly as claimed in claim 11 , wherein the tilt mechanism includes a plurality of diffractive elements.
22. The optical assembly as claimed in claim 11 , wherein the tilt mechanism includes a sloped surface.
23. The optical assembly as claimed in claim 11 , wherein the tilt mechanism includes a plurality of prisms.