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

Claim 5:
6. The beam splitting and combining device as claimed in claim 1, wherein:
the first prism is a square pyramidal prism and further comprises a seventh surface allowing the beam in the second range of wavelengths to pass through, and an eighth surface allowing the beam in the third range of wavelengths to pass through;
the second prism is a triangular pyramidal prism and further comprises a ninth surface allowing the beam in the third range of wavelengths to pass through;
a part of the beam in the first range of wavelengths passes through the first surface, the second surface, the first optical film, the fifth surface, and the sixth surface in order or in reverse order;
another part of the beam in the first range of wavelengths passes through the first surface and the third surface in order or in reverse order;
the beam in the second range of wavelengths passes through the first surface, is reflected on the first optical film, and passes through the seventh surface in order or in reverse order;
a part of the beam in the third range of wavelengths passes through the first surface, is reflected on the third surface, and passes through the eighth surface in order or in reverse order.