公开(公告)号：US12253694B2

公开(公告)日：2025-03-18

申请号：US17732329

申请日：2022-04-28

Applicant: VisEra Technologies Company Ltd.

Inventor： Hsin-Yi Hsieh ,  Po-Han Fu ,  Hsin-Wei Mao ,  Wei-Ko Wang ,  Chin-Chuan Hsieh

IPC: G02B5/18 ,  G02B27/09 ,  G02B27/10 ,  G02B27/44

Abstract: The optical system includes a projector, a deflector, a polarizer, a first grating coupler structure, and a second grating coupler structure. The projector emits three beams having different wavelengths. The deflector is disposed below the projector and is configured to change incident angles of the three beams and to focus the three beams at the same region of the first grating coupler structure. The first grating coupler structure is below the deflector and is configured to couple the three beams into a light-guide lens such that the three beams travel the same optical path within the light-guide lens. The light-guide lens is connected to the first grating coupler structure and is configured to transmit the three beams. The polarizer is disposed between the projector and the deflector and is configured to filter out transverse electric (TE) modes or transverse magnetic (TM) modes of the three beams.

公开(公告)号：US12123776B2

公开(公告)日：2024-10-22

申请号：US17824635

申请日：2022-05-25

Applicant: VisEra Technologies Company Ltd.

Inventor： Wen-Yu Shih ,  Hsin-Yi Hsieh ,  Lai-Hung Lai ,  Po-Han Fu ,  Chin-Chuan Hsieh

IPC: G01J3/28 ,  G01J3/02 ,  G02B1/11 ,  G02B5/18

CPC classification number: G01J3/2803 ,  G01J3/0208 ,  G01J3/0291 ,  G02B1/11 ,  G02B5/1866

Abstract: A spectrometer includes a plurality of photodetectors, an anti-reflection layer, a grating layer, a distant layer, and a collimator. The anti-reflection layer is disposed on the plurality of photodetectors. The grating layer is disposed above the anti-reflection layer and includes a plurality of grating structures to spread a light into a spectrum to the plurality of photodetectors through the distant layer. The distant layer continuously extends from the grating layer to the anti-reflection layer, the distant layer has a thickness in a range from 400 μm to 2000 μm, and a refractive index of the grating layer is greater than a refractive index of the distant layer. The collimator is disposed above the grating layer, in which the collimator is configured to confine an incident angle of the light from a first micro-lens.