SG11201903079YA - Ir imaging system with continuous gc-pc zoom provided with a tpc configuration - Google Patents

Ir imaging system with continuous gc-pc zoom provided with a tpc configuration

Info

Publication number
SG11201903079YA
SG11201903079YA SG11201903079YA SG11201903079YA SG11201903079YA SG 11201903079Y A SG11201903079Y A SG 11201903079YA SG 11201903079Y A SG11201903079Y A SG 11201903079YA SG 11201903079Y A SG11201903079Y A SG 11201903079YA SG 11201903079Y A SG11201903079Y A SG 11201903079YA
Authority
SG
Singapore
Prior art keywords
image
focal length
group
imaging system
diaphragm
Prior art date
Application number
SG11201903079YA
Inventor
Bertrand Forestier
Original Assignee
Thales Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thales Sa filed Critical Thales Sa
Publication of SG11201903079YA publication Critical patent/SG11201903079YA/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/20—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having an additional movable lens or lens group for varying the objective focal length
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/005—Diaphragms
    • G02B5/006—Diaphragms cooled
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/008—Mountings, adjusting means, or light-tight connections, for optical elements with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/69—Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/30—Transforming light or analogous information into electric information
    • H04N5/33—Transforming infrared radiation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Nonlinear Science (AREA)
  • Lenses (AREA)

Abstract

IR IMAGING SYSTEM WITH CONTINUOUS GC-PC ZOOM PROVIDED WITH A TPC CONFIGURATION 5 The invention relates to a passive IR imaging system with: - a matrix-array detector (1) in a cryostat comprising a cold diaphragm ( 3 ), - an image-forming device, of focal length that is continuously variable 10 between FCC and Fpc with, in this range of focal lengths, a constant numerical aperture and an aperture diaphragm level with the cold diaphragm, comprising: o a head group (Gf1) of fixed position and constant focal length with at least one lens in a mechanical holding means 15 (5) by the PC configuration, o a first group and second group that are movable and positioned in order to ensure the change of focal length between and the focus of the image, o an image-transport group (Gf2) of fixed position and of 20 constant magnification, able to image the aperture diaphragm in order to limit the diameter of the PC useful beams on the lenses of the head group. The device comprises a TPC configuration with the first and second movable groups positioned to obtain the focal length FTPC, and its 25 aperture diaphragm embodied in the mechanical holding means. Figure 3C
SG11201903079YA 2016-10-06 2017-10-05 Ir imaging system with continuous gc-pc zoom provided with a tpc configuration SG11201903079YA (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1601451A FR3057427B1 (en) 2016-10-06 2016-10-06 GC-PC CONTINUOUS ZOOM IR IMAGING SYSTEM WITH TPC CONFIGURATION
PCT/EP2017/075306 WO2018065508A1 (en) 2016-10-06 2017-10-05 Ir imaging system with continuous gc-pc zoom provided with a tpc configuration

Publications (1)

Publication Number Publication Date
SG11201903079YA true SG11201903079YA (en) 2019-05-30

Family

ID=58314281

Family Applications (1)

Application Number Title Priority Date Filing Date
SG11201903079YA SG11201903079YA (en) 2016-10-06 2017-10-05 Ir imaging system with continuous gc-pc zoom provided with a tpc configuration

Country Status (7)

Country Link
US (1) US10620412B2 (en)
EP (1) EP3523957B1 (en)
AU (1) AU2017339069B2 (en)
FR (1) FR3057427B1 (en)
PL (1) PL3523957T3 (en)
SG (1) SG11201903079YA (en)
WO (1) WO2018065508A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110161663B (en) * 2019-04-22 2020-04-03 中国科学院西安光学精密机械研究所 Refrigeration type athermal infrared fisheye optical system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04367808A (en) * 1991-06-14 1992-12-21 Canon Inc Photographing device with incorporated extender
US8466964B2 (en) * 2007-04-02 2013-06-18 Opto-Knowledge Systems, Inc. Multispectral uncooled thermal infrared camera system
FR2916862B1 (en) * 2007-05-30 2010-07-30 Sagem Defense Securite INFRARED CAMERA COMPRISING A HIGH-THRESHOLD OPTICAL ZOOM AND CORRESPONDING METHOD OF OBSERVING A SCENE
US7683321B1 (en) * 2008-12-19 2010-03-23 Fluke Corporation Shutterless infrared imager algorithm with drift correction
FR2974189B1 (en) * 2011-04-14 2013-12-20 Onera (Off Nat Aerospatiale) IMAGING SYSTEM COMPRISING A FRESNEL LENS
CN205581385U (en) * 2016-03-16 2016-09-14 凯迈（洛阳）测控有限公司 Optical compensation formula long wave infrared continuous zoom optical system

Also Published As

Publication number Publication date
FR3057427B1 (en) 2018-11-16
AU2017339069A1 (en) 2019-05-02
EP3523957B1 (en) 2020-07-29
WO2018065508A1 (en) 2018-04-12
US20190285864A1 (en) 2019-09-19
PL3523957T3 (en) 2020-11-16
FR3057427A1 (en) 2018-04-13
US10620412B2 (en) 2020-04-14
EP3523957A1 (en) 2019-08-14
AU2017339069B2 (en) 2021-12-09

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