Patent ID: 9720180
Date: 2017-08-01
CPC Classifications: G02B

Claim:
1. A multicast optical switch based on free-space transmission, comprising: a 1×M input collimator array, a light splitting device, an optical distance compensation device, a spot transformation device, a 1×N output collimator array, and a reflector array arranged sequentially, wherein the 1×N output collimator array corresponds to the reflector array, the light splitting device is provided with a splitting surface and a reflecting surface for causing input signal light of the 1×M input collimator array being subjected to n (n≧2) times of light splitting and beam splitting to generate N=2 wherein the optical distance compensation device is for compensating optical distance difference among M×N beams of sub-signal light generate from the light splitting device; wherein the spot transformation device is for focusing the M×N beams of the sub-signal light into 1×N light spots which are incident on the reflector array.