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公开(公告)号：US12123776B2
公开(公告)日：2024-10-22
申请号：US17824635
申请日：2022-05-25
发明人： Wen-Yu Shih , Hsin-Yi Hsieh , Lai-Hung Lai , Po-Han Fu , Chin-Chuan Hsieh
CPC分类号： G01J3/2803 , G01J3/0208 , G01J3/0291 , G02B1/11 , G02B5/1866
摘要： 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.
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公开(公告)号：US11662525B1
公开(公告)日：2023-05-30
申请号：US17547021
申请日：2021-12-09
发明人： Hsin-Yi Hsieh , Chin-Chuan Hsieh
摘要： An optical system includes a light module, an optical element on a first grating coupler, and a second grating coupler. The light module emits three beams from different positions. The optical element is below the light module 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. The first grating coupler is below the optical element and is configured to couple the three beams into a light-guide substrate. The light-guide substrate is connected to the first grating coupler and is configured to transmit the three beams. The second grating coupler is connected to the light-guide substrate and is configured to enable the three beams departing from the light-guide substrate after the three beams have traveled the same optical path.
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公开(公告)号：US11662526B1
公开(公告)日：2023-05-30
申请号：US17547025
申请日：2021-12-09
发明人： Hsin-Yi Hsieh , Chin-Chuan Hsieh
CPC分类号： G02B6/34 , G02B6/124 , G02B6/4204 , G02B6/4214
摘要： An optical structure includes a grating coupler and a microlens. The grating coupler is configured to receive a laser light. The microlens is above the grating coupler, in which a metal shielding covers the microlens and has an opening to allow the laser light entering an effective coupling region of the grating coupler.
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公开(公告)号：US11841270B1
公开(公告)日：2023-12-12
申请号：US17824614
申请日：2022-05-25
发明人： Lai-Hung Lai , Hsin-Yi Hsieh , Chin-Chuan Hsieh
CPC分类号： G01J3/2823 , G01J3/0208 , G01J3/18 , G02B6/42 , G02B6/4215 , G02B27/30 , H01L27/14625 , H10K39/32
摘要： The spectrometer includes a lightguide substrate, an upper grating layer, a lower grating layer, an image sensor, and a readout circuit. The upper grating layer is disposed on the lightguide substrate and configured to receive a light. The upper grating layer includes a first grating structure, a second grating structure, and a third grating structure, and the first, second, and third grating structures have different grating periods. The lightguide substrate is configured to diffract the light when the light propagates into the lightguide substrate, such that multiple diffraction lights are formed and each of the multiple diffraction lights has different wavelengths and different optical path. The lower grating layer is disposed under the lightguide substrate and configured to emit the multiple diffraction lights. The image sensor is disposed under the lower grating layer. The readout circuit is disposed under the image sensor.
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