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公开(公告)号：US20220075164A1
公开(公告)日：2022-03-10
申请号：US17419757
申请日：2019-04-02
Applicant: SOOCHOW UNIVERSITY
Inventor： Jiacheng ZHU , Weimin SHEN
Abstract: A compact, catadioptric and athermal imaging spectrometer is disclosed. A telecentric light (1) incident from a slit (2) is folded or refracted by an object-side prism (3) to enter a plano-convex lens (4); after being refracted by the plano-convex lens (4) and a meniscus lens (5), and refracted and reflected by a thick catadioptric lens (6), said telecentric light is incident onto a convex grating (7) in the form of a convergent beam; and after said beam is diffracted, spectral division is implemented. The divergent beam is sequentially refracted and reflected by the thick catadioptric lens (6), and refracted by the meniscus lens (5) and the plano-convex lens (4) to enter an image-side prism (8). Said beam is folded or refracted and filtered, and imaged on a focal plane (10) to realize spectral imaging.
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2.发明公开公开(公告)号：US20240310163A1
公开(公告)日：2024-09-19
申请号：US18413562
申请日：2024-01-16
Applicant: SOOCHOW UNIVERSITY
Inventor： Xinhua CHEN , Shiyu GE , Weimin SHEN
IPC: G01B11/24
CPC classification number: G01B11/24
Abstract: Disclosed is a line spectral confocal three-dimensional measurement system and method using a linear variable filter. The system includes a light source module for providing light radiation, a spectral confocal module, and a signal acquisition module. The spectral confocal module includes a first linear variable filter, a first imaging lens group, a second imaging lens group, and a second linear variable filter. The first linear variable filter is configured to separate the light radiation according to different wavelengths. The first imaging lens group is configured to focus the light radiation with different wavelengths at different heights along a normal line of a surface of a measured object. The second imaging lens group is configured to guide the focused light radiation to the second linear variable filter, and the light radiation at a corresponding position of the first linear variable filter passes through the second linear variable filter.
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Patent Agency Ranking
公开(公告)号：US20230280571A1
公开(公告)日：2023-09-07
申请号：US17908113
申请日：2022-03-18
Applicant: SOOCHOW UNIVERSITY
Inventor： Xinhua CHEN , Yueping LU , Zhicheng ZHAO , Qiao PAN , Weimin SHEN
CPC classification number: G02B17/0812 , G02B27/0025 , G02B13/18
Abstract: The invention provides a wide-aperture spherical primary mirror off-axis afocal optical system, including a primary mirror, a secondary mirror and an aberration compensation mirror group. The primary mirror is a spherical reflector, the secondary mirror are higher-order aspherical reflectors. The primary mirror and the secondary mirror form an off-axis two-mirror system to compress the beam aperture. The aberration compensation mirror group is a coaxial reflective system that is used off-axis. The aberration compensation mirror group has focal power to produce compensation aberrations. The incident beam passes through and is reflected by the primary mirror and secondary mirror sequentially and enters the aberration compensation mirror group thereafter. A spherical reflector is used as the primary mirror, which significantly reduces the development and manufacture cost of the system, and an aberration compensation mirror group is used off-axis to correct residual aberration in the system, which effectively improves imaging quality of the system.
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公开(公告)号：US20230280268A1
公开(公告)日：2023-09-07
申请号：US17908269
申请日：2021-08-23
Applicant: SOOCHOW UNIVERSITY
Inventor： Jiacheng ZHU , Weiqi LU , Xinhua CHEN , Jiankang ZHOU , Weimin SHEN
CPC classification number: G01N21/31 , G02B5/201 , G01N2201/0221 , H04M1/21
Abstract: The present invention provides an on-chip integrated cell phone spectrometer and a cell phone. The spectrometer includes: a detection system, including a cell phone lens and a focal plane detector integrated with a Bayer filter; and a spectral filter array, integrated at an edge of the Bayer filter, the spectral filter array including a plurality of filtering channels with different spectral transmittances, each filtering channel corresponding to one or more detector pixels, where the cell phone lens is configured to acquire a reflected light from an object under test, the focal plane detector is configured to acquire an intensity signal of the reflected light, and after different intensity signals corresponding to different filtering channels are obtained, a data processing system performs spectral reconstruction to obtain spectral data of the object under test.
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公开(公告)号：US20230332953A1
公开(公告)日：2023-10-19
申请号：US17636844
申请日：2020-12-09
Applicant: SOOCHOW UNIVERSITY
Inventor： Jiacheng ZHU , Qiao PAN , Xinhua CHEN , Weimin SHEN
CPC classification number: G01J3/2823 , G01J3/04 , G01J3/021 , G01J3/0218
Abstract: The invention provides a curved-slit imaging spectrometer, wherein a fiber bundle transfers a straight line image of a front objective lens to a curved slit, and the front objective lens doesn't need to have a curved image plane to directly abut the spectrometer, so that the system is less complicated, and the front objective lens and spectrometer have a simple structure. The arc-shaped or approximately arc-shaped curved slit matches the optimum imaging circle of the Offner-type spectrometer, thereby achieving an extra-long slit. The arced slit is 5 to 10 times longer than the straight slit of the classical Offner-type spectrometer. In the case of a compact size, the length of the slit can be greater than 100 mm. Also, the same spectral response function applies in different fields of view while presenting desirable imaging quality.
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6.发明公开公开(公告)号：US20230314795A1
公开(公告)日：2023-10-05
申请号：US17760583
申请日：2020-12-19
Applicant: SOOCHOW UNIVERSITY
Inventor： Jian BAO , Qiuyang SHEN , Xinhua CHEN , Weimin SHEN
CPC classification number: G02B27/0012 , G01J3/14 , G01J3/18 , G01J3/2823 , G01J2003/1208
Abstract: The invention discloses a design method of a wavenumber linearity dispersion optical system and an imaging spectrometer, including: building an optical system including a grating, a prism and an objective lens that are sequentially arranged, the grating adjoins the prism; defining a linearity evaluation coefficient RMS; assigning a minimum value to the linearity evaluation coefficient RMS through adjustment to the vertex angle of the prism, when the linearity evaluation coefficient RMS is at minimum, the vertex angle of the prism being α1; acquiring compensations for distortion and longitudinal chromatic aberration of the objective lens based on the interval between equal-difference wavenumbers on the image plane when the vertex angle of the prism is α1; and optimizing the objective lens based on the compensations for distortion and longitudinal chromatic aberration of the objective lens to obtain an optimized optical system. Higher wavenumber linearity can be achieved through objective-lens-aberration compensated wavenumber linearity.
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公开(公告)号：US20220244561A1
公开(公告)日：2022-08-04
申请号：US17623766
申请日：2020-05-06
Applicant: SOOCHOW UNIVERSITY
Inventor： Xinhua CHEN , Zhicheng ZHAO , Tuotuo YANG , Jiacheng ZHU , Weimin SHEN
IPC: G02B27/62
Abstract: A fast assembly method of an Offner spectral imaging optical system. The Offner spectral imaging optical system is a concentric or nearly concentric optical system, that is, its primary mirror (7), convex grating (5) and three-mirror (8) are all spherical, and respective centers of curvature coincide or basically coincide. Based on the self-collimation principle, the invention quickly determines the position of the center of curvature of the spherical mirror by observing the self-collimation image after the point light source is reflected by the spherical mirror. The assembly and adjustment method provided by the invention has the characteristics of fast assembly and adjustment speed, high precision, low requirements for assembly and adjustment environment and low required equipment cost, and can quickly and effectively complete the assembly and adjustment of the Offner spectral imaging optical system.
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