公开(公告)号：US20220307903A1

公开(公告)日：2022-09-29

申请号：US17616924

申请日：2020-07-27

Applicant: NATIONAL UNIVERSITY OF SINGAPORE

Inventor： Guangya ZHOU ,  Yu DU ,  Koon Lin CHEO ,  Fook Siong CHAU

IPC: G01J3/28 ,  G01J3/18 ,  G01J3/02 ,  G01J3/06 ,  G02B26/08 ,  G02B27/46

Abstract: A spectral imaging system comprises: a spatial encoder comprising a first light encoding device comprising a first mask for spatial encoding, the first mask being configured with one or more encoding patterns; a spectral encoder comprising: a dispersion arrangement for splitting spatially encoded light from the first light encoding device into a plurality of components; and a second light encoding device comprising a second mask for spectral encoding of the plurality of components, the second mask having one or more encoding patterns; and at least one single-pixel photodetector positioned to measure light that is encoded by the masks. The spatial encoder is operable to spatially encode light by generating a sequence of different patterns or partial patterns of the one or more encoding patterns of the first mask. The spectral encoder is operable to spectrally encode light by relative movement between the dispersion arrangement and the second mask.

公开(公告)号：US20250137931A1

公开(公告)日：2025-05-01

申请号：US18689539

申请日：2022-09-01

Applicant: NATIONAL UNIVERSITY OF SINGAPORE

Inventor： Guangya ZHOU

IPC: G01N21/65

Abstract: A spectrometer for detecting an electromagnetic (EM) wave spectrum having one or more wavelength components within a spectral band of interest, a method of detecting an electromagnetic (EM) wave spectrum having one or more wavelength components within a spectral band of interest, and a method of constructing the spectrometer. The method comprises the steps of creating dispersed images of an entrance aperture on a plane of an exit aperture, such that respective images at the different wavelength components are offset by different amounts of displacements along a direction of dispersion; gathering a first EM wave energy incident on the entrance aperture to an EM detector; gathering a second EM wave energy that exits the exit aperture to the at least one single-pixel detector; and measuring the output of the EM detector and the output of the at least one single pixel detector for reconstructing the EM wave spectrum taking into account an intensity distribution of an incident EM wave on the entrance aperture.

公开(公告)号：US20240377252A1

公开(公告)日：2024-11-14

申请号：US18292507

申请日：2022-07-22

Applicant: NATIONAL UNIVERSITY OF SINGAPORE

Inventor： Zi Heng LIM ,  Yi QI ,  Senthil Kumar ANANTHARAJAN ,  Chengkuo LEE ,  Guangya ZHOU

IPC: G01J3/02 ,  G01J3/12 ,  G01J3/28

Abstract: Infrared spectrometer and method of performing infrared spectrometry. In one embodiment, the method comprises the steps of providing a first single pixel detector sensitive to infrared light in a first spectral range; providing an entrance slit for receiving an infrared light signal; disposing a moveable encoding mask between the entrance slit and the first single pixel detector for encoding based multiplexing, the moveable encoding mask comprising at least three adjacent coding sections along an encoding moving direction thereof, each coding section comprising the same coding pattern in a cyclic manner such that a last encoding step of one encoding section is the same as a first encoding step in a next encoding section step; disposing a dispersion and imaging optics between the entrance slit and the moveable encoding mask for dispersing the infrared signal and for imaging the dispersed infrared signal onto the moveable encoding mask; disposing a collection optics between the moveable encoding mask and the first single pixel detector for collecting an encoding based multiplexed version of the infrared signal onto the first single pixel photodetector; selectively allowing only one of at least first and second bands within the first spectral range to be imaged onto respective ones of the coding sections excluding a first coding section along the encoding moving direction of the moveable encoding mask, in a starting position of the moveable encoding mask; and moving the moveable encoding mask in the encoding moving direction for the encoding based multiplexing.

公开(公告)号：US20140285905A1

公开(公告)日：2014-09-25

申请号：US14294018

申请日：2014-06-02

Applicant: NATIONAL UNIVERSITY OF SINGAPORE

Inventor： Guangya ZHOU ,  Hongbin Yu ,  Fook Siong Chau

IPC: G02B13/00 ,  B81B5/00 ,  G02B15/00

CPC classification number: G02B15/16 ,  B81B5/00 ,  G02B7/09 ,  G02B7/10 ,  G02B7/102 ,  G02B13/0065 ,  G02B13/0075 ,  G02B13/009 ,  G02B15/00 ,  G02B26/0833 ,  G03B5/02 ,  G03B2205/0046 ,  G03B2205/0084 ,  H04N5/23296 ,  Y10T29/4978 ,  Y10T29/49826

Abstract: The present application provides a micromechanical (MEMS) based zoom lens system, for use in miniature device applications, such as miniature electronic imaging devices. The MEMS-based zoom lens system comprises at least four optical elements, or two Alvarez or Lohmann lenses, that are configured for passage of optical signals therethrough along an optical signal path. Each optical element is MEMS-driven and displaceable in a direction substantially transverse to the optical signal path. In use, the transverse displacement of the optical elements vary an overall focal length of the MEMS zoom lens system such as to provide an optical zoom function. A method of manufacturing a MEMS zoom lens system is also provided in a further aspect.

Abstract translation: 本申请提供了一种用于微型设备应用（例如微型电子成像设备）的基于微机械（MEMS）的变焦透镜系统。 基于MEMS的变焦透镜系统包括至少四个光学元件或两个Alvarez或者Lohmann透镜，其被配置成沿光信号路径通过光信号。 每个光学元件是MEMS驱动的，并且可以在基本上横向于光学信号路径的方向上移位。 在使用中，光学元件的横向位移改变了MEMS变焦透镜系统的总体焦距，例如提供光学变焦功能。 在另一方面，还提供了制造MEMS变焦透镜系统的方法。