Patent ID: 11867920
Assignee: SINTAI OPTICAL (SHENZHEN) CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 2:
3. The beam splitting and combining device as claimed in claim 1, further comprising:
a third prism comprising a seventh surface, an eighth surface, a ninth surface, a tenth surface and an eleventh surface; and
a second optical film formed between the sixth surface and the eighth surface;
wherein the eighth surface and the sixth surface are attached to each other;
wherein the seventh surface allows the beam in the third range of wavelengths to pass through;
wherein the ninth surface allows the beams in the first, second and third ranges of wavelengths to pass through;
wherein the tenth surface allows the beam in the second range of wavelengths to pass through;
wherein the eleventh surface allows the beam in the first range of wavelengths to pass through and reflects the beam in the second range of wavelengths;
wherein the second optical film allows the beam in the first range of wavelengths to pass through and reflects the beam in the third range of wavelengths;
wherein the third surface and the sixth surface are disposed in parallel or are coplanar;
wherein the third surface allows the beam in the first range of wavelengths to pass through and reflects the beam in the third range of wavelengths.