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公开(公告)号：US20220260829A1
公开(公告)日：2022-08-18
申请号：US17350217
申请日：2021-06-17
发明人： YI-LIN TAN , JUN ZHU , GUO-FAN JIN , SHOU-SHAN FAN
IPC分类号： G02B27/00
摘要： The present application relates to a method for designing a nonsymmetric freeform surface optical system, and the method including the following steps establishing an initial plane system. The initial plane system is consistent with the expected system structure, but there is no focal power in the initial plane system. The image plane tilt angle of the initial plane system is defined as θ. The point-by-point method is used to calculate the coordinates and normal vectors of the data points used to construct the freeform surface. The iterative optical system is obtained by iteration; and the iterative optical system is optimized.
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公开(公告)号：US20220252871A1
公开(公告)日：2022-08-11
申请号：US17235096
申请日：2021-04-20
发明人： BEN-QI ZHANG , JUN ZHU , YI-LIN TAN , GUO-FAN JIN , SHOU-SHAN FAN
摘要： A method for designing a freeform concave grating imaging spectrometer includes selecting a series of light rays incident from different positions of a slit as characteristic light rays. The coordinates and normal directions of characteristic data points at intersections of the characteristic light rays and a surface of a freeform concave grating are calculated. A freeform surface shape of the freeform concave grating is obtained by fitting, so that an initial structure is obtained. Then the initial structure is optimized.
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公开(公告)号：US20210373288A1
公开(公告)日：2021-12-02
申请号：US16998185
申请日：2020-08-20
发明人： JUN ZHU , Ben-qi Zhang , GUO-FAN JIN
摘要： A method for designing freeform surface imaging system comprises: constructing a series of coaxial spherical systems with different optical power (OP) distributions; tilting all optical elements of each coaxial spherical system by a series of angles to obtain a series of off-axis spherical systems; finding all unobscured off-axis spherical systems; and then specifying a system size or structural constraints, and finding a series of compact unobstructed off-axis spherical systems; constructing a series of freeform surface imaging systems based on the series of compact unobstructed off-axis spherical system, and correcting the OP of entire system; improving an image quality of each freeform surface imaging systems and finding an optimal tilt angle of an image surface; and automatically evaluating an image quality of each freeform surface imaging system based on an evaluation metric, and outputting the freeform surface imaging systems that meet a given requirements.
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公开(公告)号：US20210215924A1
公开(公告)日：2021-07-15
申请号：US16999228
申请日：2020-08-21
发明人： JUN ZHU , Rui-rui Tang , WEI-CHEN WU , GUO-FAN JIN , SHOU-SHAN FAN
摘要： A freeform surface optical telescope imaging system is provided. The freeform surface optical telescope imaging system comprises a primary mirror, a secondary mirror, a compensating minor, and a spherical mirror. The primary minor, the secondary minor, the compensating minor, and the spherical mirror are spaced from each other. A surface shape of each of the primary mirror and the secondary mirror is a quadric surface. The primary mirror is used as an aperture stop. A surface shape of the compensating mirror is a freeform surface. A surface shape of the spherical mirror is a spherical surface. A light emitted from a light source would be reflected by the primary mirror, the secondary minor, the compensating mirror, and the spherical mirror to form an image on an image plane.
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公开(公告)号：US20190219800A1
公开(公告)日：2019-07-18
申请号：US16220294
申请日：2018-12-14
发明人： Rui-rui Tang , Ben-qi Zhang , JUN ZHU , GUO-FAN JIN , SHOU-SHAN FAN
CPC分类号： G02B17/0642 , G02B27/0012
摘要： The present disclosure relates to a method of designing a freeform surface off-axial imaging system. The method comprises the steps of establishing an initial system and selecting feature fields; gradually enlarging a construction of feature field, and constructing the initial system into a freeform surface system; and expanding a construction area of each freeform surface of the freeform surface system, and reconstructing the freeform surface in an extended construction area.
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公开(公告)号：US20180306642A1
公开(公告)日：2018-10-25
申请号：US15853855
申请日：2017-12-25
发明人： LEI HUANG , JUN ZHU , GUO-FAN JIN , SHOU-SHAN FAN
CPC分类号： G01J1/4257 , G01J1/0242 , G01J1/0411 , G01J1/08 , G01J1/4228 , G01J1/58 , G01J5/023 , G01J5/061 , G01J5/0853 , H01J37/26
摘要： A light intensity distribution comprises a carbon nanotube array located on a surface of a substrate, a reflector, an imaging element and a cooling device. The carbon nanotube array absorbs photons from a light source and radiates a visible light. The reflector reflects the visible light and is spaced from the carbon nanotube array. The imaging element images the visible light reflected by the reflector. The cooling device is used to cool the substrate to make a contact surface between the substrate and the carbon nanotube array maintain a constant temperature. The cooling device is located between the substrate and the imaging device. The imaging device is spaced from the cooling device.
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公开(公告)号：US20180180898A1
公开(公告)日：2018-06-28
申请号：US15706740
申请日：2017-09-17
发明人： JUN ZHU , TONG YANG , GUO-FAN JIN , SHOU-SHAN FAN
摘要： A freeform surface off-axial three-mirror image-side telecentric optical system comprises a primary mirror, a secondary mirror, a tertiary mirror and an image sensor. The secondary mirror is the aperture stop. A reflective surface of the primary mirror is a fourth-order polynomial freeform surface of xy. Each of a reflective surface of the secondary mirror and a reflective surface of the tertiary mirror is a sixth-order polynomial freeform surface of xy.
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公开(公告)号：US20180180479A1
公开(公告)日：2018-06-28
申请号：US15730682
申请日：2017-10-11
发明人： JUN ZHU , TONG YANG , XIAO-FEI WU , GUO-FAN JIN , SHOU-SHAN FAN
CPC分类号： G01J3/0289 , G01J3/2823 , G01J2003/283 , G02B27/0012
摘要： An initial system and a constraint condition are established. All freeform surfaces are obtained by surface fitting the feature data points to form a first freeform surface imaging optical system. The first freeform surface imaging optical system is taken as the initial system for multiple iterations to obtain a second freeform surface imaging optical system. The second freeform surface imaging optical system is taken as a first base system. A first surface freedom of the first base system is selected, the values nearby the first surface freedom is selected, and surface positions and tilts of the first base system are changed to obtain a third freeform surface imaging optical system that satisfies the constraint condition. A second base system is selected and the method above is repeated. The freeform surface imaging optical system is obtained until all freedoms for surface positions and tilts have been used.
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公开(公告)号：US20180157017A1
公开(公告)日：2018-06-07
申请号：US15672307
申请日：2017-08-09
发明人： TONG-TONG GONG , JUN ZHU , GUO-FAN JIN , SHOU-SHAN FAN
CPC分类号： G02B17/0626 , G02B5/10 , G02B17/0642 , G02B27/0012
摘要： A method for designing an off-axis aspheric optical system comprises establishing an initial system and selecting a plurality of feature rays Ri (i=1, 2 . . . K); solving a plurality of feature data points (P1, P2, . . . Pm) to obtain an initial off-axis aspheric surface Am by surface fitting the plurality of feature data points (P1, P2, . . . Pm), wherein m is less than K; introducing an intermediate point Gm to solve a (m+1)th feature data point Pm+1, and fitting a plurality of feature data points (P1, P2, . . . Pm, Pm+1) to obtain an off-axis aspheric surface Am+1; repeating such steps until a Kth feature data point PK is solved, and fitting a plurality of feature data points (P1, P2, . . . PK) to obtain an off-axis aspheric surface AK; and repeating above steps until all the aspheric surfaces of the off-axis aspheric optical system are obtained.
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10.发明申请公开(公告)号：US20160232257A1
公开(公告)日：2016-08-11
申请号：US15011640
申请日：2016-01-31
发明人： JUN ZHU , TONG YANG , XIAO-FEI WU , GUO-FAN JIN , SHOU-SHAN FAN
CPC分类号： G06F17/5009 , G02B17/0642 , G02B17/0663 , G02B27/0012
摘要： A method for designing off-axial optical system with freeform surfaces is provided. An initial system is established. A freeform surface of the off-axial optical system that needs to be solved is defined as a freeform surface. A number of feature rays are selected. A number of intersections of the feature rays with the freeform surface are calculated point by point based on a given object-image relationship and a vector form of Snell's law. A number of first feature data points are obtained from the intersections and surface fitted to obtain the freeform surface. All the freeform surfaces of the off-axial optical system that need to be solved are obtained by the method above to form a before-iteration off-axial optical system. The before-iteration off-axial optical system is used as the initial system for multiple iterations to obtain an after-iteration off-axial optical system.
摘要翻译： 提供了一种用于设计具有自由曲面的离轴光学系统的方法。 建立初始系统。 需要解决的离轴光学系统的自由曲面被定义为自由曲面。 选择了许多特征光线。 基于给定的对象 - 图像关系和Snell定律的向量形式，逐点计算特征射线与自由曲面的多个交点。 从交叉点和表面拟合获得许多第一特征数据点以获得自由曲面。 通过上述方法获得需要解决的所有离轴光学系统的所有自由曲面，以形成前迭代离轴光学系统。 前迭代离轴光学系统用作多次迭代的初始系统，以获得后迭离轴向光学系统。
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