Patents by Inventor Guo-Fan Jin

Guo-Fan Jin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11099367
    Abstract: A freeform surface off-axial three-mirror imaging system comprising a primary mirror, a secondary mirror, a tertiary mirror, and a detector. The secondary mirror comprises a first freeform surface and a second freeform surface. Each reflective surface of the primary mirror, the first freeform surface, the second freeform surface and the tertiary mirror is an xy polynomial freeform surface. The freeform surface off-axial three-mirror imaging system comprises a first effective focal length and a second effective focal length different from the first effective focal length.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: August 24, 2021
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Jun Zhu, Rui-rui Tang, Guo-Fan Jin, Shou-Shan Fan
  • Publication number: 20210215918
    Abstract: A freeform surface off-axial three-mirror imaging system is provided. The freeform surface off-axial three-mirror imaging system comprises a primary mirror, a secondary mirror, and a compensating mirror. The primary mirror, the secondary mirror, and the compensating mirror are located adjacent and spaced away 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 light emitted from a light source is reflected by the primary mirror, the secondary mirror, and the compensating mirror to form an image on an image plane.
    Type: Application
    Filed: August 21, 2020
    Publication date: July 15, 2021
    Inventors: JUN ZHU, Rui-rui Tang, WEI-CHEN WU, GUO-FAN JIN, SHOU-SHAN FAN
  • Publication number: 20210215924
    Abstract: 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.
    Type: Application
    Filed: August 21, 2020
    Publication date: July 15, 2021
    Inventors: JUN ZHU, Rui-rui Tang, WEI-CHEN WU, GUO-FAN JIN, SHOU-SHAN FAN
  • Patent number: 11043521
    Abstract: A freeform surface off-axial three-mirror imaging system comprising a primary mirror, a secondary mirror, a tertiary mirror, and an image sensor. Each reflective surface of the primary mirror, the secondary mirror, and the tertiary mirror is an xy polynomial freeform surface. A field angle of the freeform surface off-axial three-mirror imaging system is larger than or equal to 60°×1°. An F-number of the freeform surface off-axial three-mirror imaging system is less than or equal to 2.5.
    Type: Grant
    Filed: December 23, 2018
    Date of Patent: June 22, 2021
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Rui-rui Tang, Ben-qi Zhang, Jun Zhu, Guo-Fan Jin, Shou-Shan Fan
  • Patent number: 11025841
    Abstract: The present invention relates to a method for designing a freeform surface reflective imaging system, comprising: selecting an initial system, wherein an FOV of the initial system is X0×Y0; selecting an FOV sequence as [X0, Y0], [X1, Y1], [X2, Y2], . . . , [Xn, Yn], while the FOV of the system to be designed is Xn×Yn, and X0<X1<X2< . . . <Xn, Y0<Y1<Y2< . . . <Yn; using point-by-point methods to construct all freeform surfaces of the initial system in the FOV of X1×Y1; setting the system obtained in the last step as a second initial system for system construction in the FOV of X2×Y2; repeating the last step to execute system construction in the order of the FOV sequence until the final FOV Xn×Yn is obtained.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: June 1, 2021
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Wei-Chen Wu, Jun Zhu, Guo-Fan Jin, Shou-Shan Fan
  • Patent number: 10983316
    Abstract: 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.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: April 20, 2021
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Rui-rui Tang, Ben-qi Zhang, Jun Zhu, Guo-Fan Jin, Shou-Shan Fan
  • Patent number: 10962413
    Abstract: A freeform surface imaging spectrometer system including a primary mirror, a secondary mirror, a tertiary mirror, and a detector is provided. The secondary mirror is a grating having a freeform surface shape, and the grating having the freeform surface shape is obtained by intersecting a set of equally spaced parallel planes with a freeform surface. A plurality of feature rays exiting from a light source is successively reflected by the primary mirror, the secondary mirror and the tertiary mirror to form an image on an image sensor. A reflective surface of each of the primary mirror, the tertiary mirror surface and the tertiary mirror is an xy polynomial freeform surface.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: March 30, 2021
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Jun Zhu, Ben-qi Zhang, Guo-Fan Jin, Shou-Shan Fan
  • Publication number: 20210033469
    Abstract: The present invention relates to a freeform surface reflective infrared imaging system comprising a primary mirror, a secondary mirror, a tertiary mirror, and an infrared light detector. Each reflective surface of the primary mirror, the secondary mirror, and the tertiary mirror is an xy polynomial freeform surface. A field of view of the freeform surface reflective infrared imaging system is larger than or equal to 40°×30°. An F-number of the freeform surface reflective infrared imaging system is less than or equal to 1.39.
    Type: Application
    Filed: June 29, 2020
    Publication date: February 4, 2021
    Inventors: WEI-CHEN WU, JUN ZHU, GUO-FAN JIN, SHOU-SHAN FAN
  • Publication number: 20210037199
    Abstract: The present invention relates to a method for designing a freeform surface reflective imaging system, comprising: selecting an initial system, wherein an FOV of the initial system is X0×Y0; selecting an FOV sequence as [X0, Y0], [X1, Y1], [X2, Y2], . . . , [Xn, Yn], while the FOV of the system to be designed is Xn×Yn, and X0<X1<X2< . . . <Xn, Y0<Y1<Y2< . . . <Yn; using point-by-point methods to construct all freeform surfaces of the initial system in the FOV of X1×Y1; setting the system obtained in the last step as a second initial system for system construction in the FOV of X2×Y2; repeating the last step to execute system construction in the order of the FOV sequence until the final FOV Xn×Yn is obtained.
    Type: Application
    Filed: June 24, 2020
    Publication date: February 4, 2021
    Inventors: WEI-CHEN WU, JUN ZHU, GUO-FAN JIN, SHOU-SHAN FAN
  • Patent number: 10816794
    Abstract: A method for designing illumination system with freeform surface, the method comprising: presupposing a plurality of expected light spots; establishing an initial system, wherein the initial system comprises a plurality of collimated light sources, a plane lens and a target plane; designing a sphere lens to replace the plane lens, and obtaining a before-construction-iteration illumination system; selecting a plurality of feature rays and obtaining a plurality of target points; taking the before-construction-iteration illumination system as an initial construction-iteration system, and obtaining an after-construction-iteration illumination system with freeform surface by making multiple construction-iteration, wherein the illumination system with freeform surface is configured to form the plurality of expected light spots.
    Type: Grant
    Filed: September 30, 2017
    Date of Patent: October 27, 2020
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Jun Zhu, Xiao-Fei Wu, Guo-Fan Jin, Shou-Shan Fan
  • Publication number: 20200241268
    Abstract: A freeform surface off-axial three-mirror imaging system comprising a primary mirror, a secondary mirror, a tertiary mirror, and a detector. The secondary mirror defines a first location and a second location. Each reflective surface of the primary mirror, the secondary mirror and the tertiary mirror is an xy polynomial freeform surface. A working distance of the freeform surface off-axial three-mirror imaging system is greater than 125 mm.
    Type: Application
    Filed: July 3, 2019
    Publication date: July 30, 2020
    Inventors: JUN ZHU, Rui-rui Tang, GUO-FAN JIN, SHOU-SHAN FAN
  • Publication number: 20200241288
    Abstract: A method of designing an freeform surface off-axial three-mirror imaging system is provided. The method includes: establishing an initial system and T (T?2) object-image relationships according to a design goal, and selecting M feature fields for each object-image relationship; using feature rays of the T object-image relationships to construct a freeform surface system by using the initial system; step (S3), the freeform surface system obtained in step (S2) is used as another initial system, using iterative process to reduce a deviation between actual intersection points and ideal target points of the feature rays and feature surfaces, iteratively reconstructing free-form surfaces in the free-form surface system.
    Type: Application
    Filed: July 3, 2019
    Publication date: July 30, 2020
    Inventors: Rui-rui Tang, JUN ZHU, GUO-FAN JIN, SHOU-SHAN FAN
  • Publication number: 20200241266
    Abstract: A freeform surface off-axial three-mirror imaging system comprising a primary mirror, a secondary mirror, a tertiary mirror, and a detector. The secondary mirror comprises a first freeform surface and a second freeform surface. Each reflective surface of the primary mirror, the first freeform surface, the second freeform surface and the tertiary mirror is an xy polynomial freeform surface. The freeform surface off-axial three-mirror imaging system comprises a first field of view formed by the first freeform surface and a second field of view formed by the second freeform surface.
    Type: Application
    Filed: July 3, 2019
    Publication date: July 30, 2020
    Inventors: JUN ZHU, Rui-rui Tang, GUO-FAN JIN, SHOU-SHAN FAN
  • Publication number: 20200241267
    Abstract: A freeform surface off-axial three-mirror imaging system comprising a primary mirror, a secondary mirror, a tertiary mirror, and a detector. The secondary mirror comprises a first freeform surface and a second freeform surface. Each reflective surface of the primary mirror, the first freeform surface, the second freeform surface and the tertiary mirror is an xy polynomial freeform surface. The freeform surface off-axial three-mirror imaging system comprises a first effective focal length and a second effective focal length different from the first effective focal length.
    Type: Application
    Filed: July 3, 2019
    Publication date: July 30, 2020
    Inventors: JUN ZHU, Rui-rui Tang, GUO-FAN JIN, SHOU-SHAN FAN
  • Patent number: 10642010
    Abstract: An off-axis hybrid surface three-mirror optical system comprises a primary mirror, a secondary mirror, a tertiary mirror, and an image sensor. A reflective surface of the primary mirror is a sixth-order polynomial freeform surface of xy. A reflective surface of the secondary mirror is a sixth-order polynomial aspheric surface of xy. A reflective surface of the a tertiary mirror is a spherical surface of xy.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: May 5, 2020
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Jun Zhu, Tong-Tong Gong, Guo-Fan Jin, Shou-Shan Fan
  • Patent number: 10642009
    Abstract: A point-by-point design method for off-axis aspheric optical system, in which feature light rays from different field angles and aperture coordinates are considered. Some of the feature data points are calculated first and surface fitted into an initial aspheric surface. Then, intermediate point calculations, feature data point calculations, and aspheric surface fitting were repeated continuously to calculate remaining feature data points and the desired aspheric surface are repeated continuously to calculate remaining feature data points and a desired aspheric surface. A least-squares method with a local search algorithm is used for aspheric surface fitting and deviations in both the coordinates and normals are used to reduce error.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: May 5, 2020
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Tong-Tong Gong, Jun Zhu, Guo-Fan Jin, Shou-Shan Fan
  • Patent number: 10527255
    Abstract: An illumination system with freeform surface comprises a plurality of collimated light sources having same parameters and a freeform surface lens comprising a first freeform surface and a second freeform surface, wherein formula of the first freeform surface and the second freeform surface is expressed as follows: z = c ? ( x 2 + y ? ? 2 ) 1 + 1 - ( 1 + k ) ? c 2 ? ( x 2 + y 2 ) + ? m ? ? n ? A mn ? x m ? y n , in which c is the curvature of the conic surface at the vertex, k is the conic constant, Amn represents the xy polynomials coefficient, m+n?2 and both m and n are even, beams emitted by the plurality of collimated light sources pass through the freeform surface lens to form a plurality of light spots on a target plane.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: January 7, 2020
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Jun Zhu, Xiao-Fei Wu, Guo-Fan Jin, Shou-Shan Fan
  • Patent number: 10495875
    Abstract: A method for designing an off-axis three-mirror imaging system with freeform surfaces is provided. A primary mirror initial structure, a secondary mirror initial structure, and a tertiary mirror initial structure are established. A number of first feature rays are selected, while the primary mirror initial structure and the secondary mirror initial structure unchanged. The first feature rays are forward ray tracked from an object space to an image detector. A number of first feature data points are calculated to obtain a tertiary mirror. A number of fields and a number of second feature rays are selected, while the secondary mirror initial structure and the tertiary mirror unchanged. The second feature rays are reverse ray tracked from the image detector to the object space. A number of second feature data points are calculated to obtain the primary mirror.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: December 3, 2019
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Wei Hou, Jun Zhu, Guo-Fan Jin, Shou-Shan Fan
  • Patent number: 10429626
    Abstract: A method for designing off-axial three-mirror optical system with freeform surfaces is provided. A first initial surface, a second initial surface, and a third initial surface are established. A plurality of feature rays are selected, while the first initial surface and the third initial surface remain unchanged; a plurality of first feature data points are calculated to obtain a third freeform surface equation by surface fitting the plurality of first feature data points. A third freeform surface and the second initial surface are remained unchanged; a plurality of second feature data points are calculated to obtain a first freeform surface equation by surface fitting the plurality of second feature data points. The third freeform surface and a first freeform surface are remained unchanged; a plurality of third feature data points are calculated to obtain a second freeform surface equation by surface fitting the plurality of third feature data points.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: October 1, 2019
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Tong Yang, Jun Zhu, Guo-Fan Jin, Shou-Shan Fan
  • Patent number: 10422999
    Abstract: 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.
    Type: Grant
    Filed: September 17, 2017
    Date of Patent: September 24, 2019
    Assignees: Tsinghua University, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Jun Zhu, Tong Yang, Guo-Fan Jin, Shou-Shan Fan