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WO2018056682A1 - Caméra infrarouge à grande longueur d'onde à angle de champ horizontal de 90 degrés, et objectif - Google Patents

Caméra infrarouge à grande longueur d'onde à angle de champ horizontal de 90 degrés, et objectif Download PDF

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Publication number
WO2018056682A1
WO2018056682A1 PCT/KR2017/010283 KR2017010283W WO2018056682A1 WO 2018056682 A1 WO2018056682 A1 WO 2018056682A1 KR 2017010283 W KR2017010283 W KR 2017010283W WO 2018056682 A1 WO2018056682 A1 WO 2018056682A1
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WO
WIPO (PCT)
Prior art keywords
lens
convex surface
concave surface
view
horizontal angle
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2017/010283
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English (en)
Korean (ko)
Inventor
신승철
정석현
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Somo Energy And Technology Co ltd
Original Assignee
Somo Energy And Technology Co ltd
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 Somo Energy And Technology Co ltd filed Critical Somo Energy And Technology Co ltd
Publication of WO2018056682A1 publication Critical patent/WO2018056682A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0087—Simple or compound lenses with index gradient
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0025—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having one lens only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • 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
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/02—Diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/20—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from infrared radiation only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B2003/0093—Simple or compound lenses characterised by the shape

Definitions

  • the present invention relates to a long-wavelength infrared camera and a lens for a camera having a horizontal angle of view of 90 degrees, and more particularly, to a low-wavelength infrared ("LWIR”) camera and a lens for a camera that can be used in various smart devices.
  • LWIR low-wavelength infrared
  • the long wavelength infrared rays are light in the wavelength range of 8 ⁇ m to 12 ⁇ m and include the wavelength range of the infrared rays emitted by humans.
  • the long wavelength infrared camera is a camera that can detect and capture infrared rays generated by humans or animals at night.
  • the body temperature of humans and animals is about 310K, and the peak wavelength at 310K of black body radiation is about 8 ⁇ m to 12 ⁇ m.
  • the conventional infrared camera is made mainly of direct-processing lenses based on germanium (Germanium) lens, the manufacturing cost is high and the manufacturing time was also long.
  • the germanium lens is mainly applied to the military field, and in the civil field, its use is insignificant due to the price problem.
  • the lens to be applied to a smart device since the lens to be applied to a smart device must have a micro-shaped shape, there is a need for a molded lens to solve this problem.
  • the present invention has been made to solve the above problems of the prior art, the object of the present invention can be applied to the mold molding optical material to lower the production cost compared to the existing germanium lens and to be easily applied to the civil field through mass production
  • the present invention provides a long wavelength infrared camera having a horizontal angle of view of 90 degrees and a lens for a camera.
  • an object of the present invention is to provide a long-wavelength infrared camera and a lens for a camera having a horizontal angle of view of 90 degrees that can be applied to various smart devices because it can implement a clearer image than conventional optical devices of germanium material.
  • a lens for a long wavelength infrared camera having a horizontal angle of view of 90 degrees according to the present invention
  • a concave surface R2 that primarily refracts light incident from a subject
  • k is the conic surface coefficient
  • A4, A6, A8 and A10, A12 are aspherical coefficients
  • h is the distance from the optical axis to the concave or convex surface and c represents the center curvature
  • the radius of curvature and the thickness have an allowable range of ⁇ 0.5%
  • Diameter of concave surface R2 / (diameter of convex surface R3) is characterized in that 0.45 (acceptable range of ⁇ 0.5%).
  • the lens is characterized in that the edge portion extending between the concave surface (R2) and the convex surface (R3) in the direction perpendicular to the optical axis is formed.
  • the lens is a lens
  • the distance between the diaphragm and the concave surface R2 is 0.13 mm ⁇ 0.5%, and the central thickness TC of the concave surface R2 and the convex surface R3 is 2.62 mm ⁇ 0.5%, from the convex surface R3.
  • the distance to the infrared filter is 1.1934.0mm ⁇ 0.5%, the thickness of the infrared filter is 0.725mm ⁇ 0.5%, the distance from the infrared filter to the sensor surface is 0.615mm ⁇ 0.5%, the refractive index of the filter is 3.421 and the dispersion ratio is 2421.0. It is characterized by.
  • the present invention having the above-described configuration, it is possible to detect a living thing or object with only one lens as an optical system for a smart device, there is an advantage that can be applied to various electronic products as well as a general mobile phone.
  • the present invention it is made of a structure capable of molding by molding, there is an advantage that the production is easy, mass production is possible, and the manufacturing unit cost is low.
  • FIG. 1 is a perspective view of a long wavelength infrared camera having a horizontal angle of view of 90 degrees according to the present invention.
  • FIG. 2 is a configuration diagram illustrating the optical system structure of FIG. 2.
  • FIG. 3 is a light tracking analysis diagram of a long-wavelength infrared camera having a horizontal angle of view of 90 degrees according to the present invention.
  • Figure 4 is a graph showing the longitudinal spherical aberration (longitudinal spherical abberration) of a long-wavelength infrared camera having a horizontal angle of view of 90 degrees according to the present invention.
  • 5 is an aberration analysis graph of astigmatism of a long-wavelength infrared camera having a horizontal angle of view of 90 degrees according to the present invention.
  • FIG. 6 is a graph illustrating distortion of a long-wavelength infrared camera having a horizontal angle of view of 90 degrees according to the present invention.
  • FIG. 7 is a graph illustrating an analysis of a Modulation Transfer Function (MTF) indicating the resolution of a long-wavelength infrared camera having a horizontal angle of view of 90 degrees according to the present invention.
  • MTF Modulation Transfer Function
  • FIG. 8 is a diagram illustrating a spot diagram of a long-wavelength infrared camera having a horizontal angle of view of 90 degrees according to the present invention.
  • the long-wavelength infrared camera 1000 having a horizontal angle of view of 90 degrees includes an aperture 100, a concave surface R2 that primarily refracts light incident from a subject, and A lens 200 including a convex surface R3 for secondarily refracting the light passing through the concave surface R2, an infrared filter 300 spaced apart from the convex surface R3, and the infrared filter And a sensor surface 400 that forms an object through light passing through the 300.
  • the diaphragm 100 disposed in front of the convex surface R3 performs a function of preventing light from entering the optical system of the present invention.
  • the lens 200 has a positive refractive index as a whole and both surfaces are aspherical.
  • the lens 200 having a horizontal angle of view of 90 degrees is formed of an optical material for molding a mold.
  • the optical material for molding the mold is made of glass or plastic, and adopts materials that can be composed of various optical systems from ultra-small diameter lenses to medium-diameter lenses by using those having higher refractive index and lens transmission characteristics than similar types of materials on the market. Good to do.
  • the lens material applied to the optical system design of the present invention is a material for molding such as Ge 27 .5- Sb 13 .5- Se 60.
  • a material having a refractive index of 2.5 or more and a transmittance of 65% or more up to a wavelength band of 12 ⁇ m may be used. Can be.
  • the optical system is composed of the optical material according to the present invention, it is possible to realize a clear image compared to the existing, and it is possible to form a molding by molding, it is possible to construct a security surveillance popular LWIR camera optical system is easy to manufacture and low manufacturing cost.
  • the long-wavelength infrared camera 1000 having a horizontal angle of view of 90 degrees proceeded with an optical design of a low-cost type LWIR 1 group applying 6400 pixels (sensor).
  • the optical system of the present invention has a form advantageous for mold molding by increasing the thickness of the lens center portion and the edge portion 210.
  • the concave surface R2 and the convex surface R3 of the lens 200 according to the present invention are defined by the following ⁇ Equation 1>.
  • k is a conic surface coefficient
  • A4, A6, A8 and A10 and A12 are aspherical coefficients
  • h is a distance from an optical axis to a concave or convex surface
  • c represents a center curvature
  • the aspherical surface coefficient is defined to define the concave surface R2 and the convex surface R3.
  • the curvature radius RC and the surface thickness ST of the concave surface R2 and the convex surface R3 of the lens 200 were set, and the refractive index n and the dispersion rate v1 were set. ).
  • the dispersion ratio v1 is defined by the following equation.
  • N110 is a refractive index at a wavelength of 10 ⁇ m of a single lens
  • n108 is a refractive index at a wavelength of 8.0 ⁇ m of a single lens
  • n112 is a refractive index at a wavelength of 12 ⁇ m of a single lens
  • the radius of curvature and the surface thickness may have an allowable range of ⁇ 0.5%.
  • the average value of the center thickness TC / diameter of the concave surface R2 and the convex surface R3 is 0.88 (acceptable range of ⁇ 0.5%)
  • the thickness of the lens center portion and the edge portion is thick, an advantageous form for mold molding is possible.
  • the distance between the aperture and the concave surface (R2) is 0.13mm ⁇ 0.5%
  • the central thickness (TC) of the concave surface (R2) and the convex surface (R3) is 2.62mm ⁇ 0.5%
  • the convex The distance from the surface R3 to the infrared filter is 1.1934.0 mm ⁇ 0.5%
  • the thickness of the infrared filter is 0.725mm ⁇ 0.5%
  • the distance from the infrared filter to the sensor surface may be set to 0.615mm ⁇ 0.5%.
  • the lens 200 may be manufactured within the tolerance of the manufactured lens, thereby manufacturing a lens having a constant optical performance.
  • the corner portion of the lens 200 in a round shape, it can be advantageous to the assembly and production of the optical system.
  • the refractive index of the infrared filter 300 is 3.421 and the dispersion rate is 2421.0.
  • a predetermined angle of view can be obtained, and at the same time, longitudinal spherical aberration, astigmatism, and distortion can be minimized, and a good state can be obtained at a value of MTF (Modulation Transfer Functions) representing resolution.
  • MTF Modulation Transfer Functions
  • An exemplary embodiment of a long wavelength infrared camera 1000 having a horizontal angle of view of 90 degrees according to the present invention is described based on the configuration as described above.
  • a lens of a camera optical system for LWIR that can be applied to a smart device includes a lens 200 of the long-wavelength infrared camera 90 degree horizontal field of view in accordance with the present invention, Ge 27 .5 13 .5 -Sb non-oxide consisting of 60 -Se Infrared optical glass was applied to mold molding.
  • the radius of curvature of the concave surface R2 and the convex surface R3 of the lens 200 is -13.1807 mm (aspherical surface), -2.6572 mm (aspherical surface), and the diameter of the concave surface R2 is 1.84 mm and convex, respectively.
  • the diameter of the surface R3 was set to 4.12 mm.
  • the entire lens 200 was formed to have a thickness of 2.745 mm.
  • an edge portion 210 extending from the concave surface R2 and the convex surface R3 is formed perpendicular to the optical axis.
  • the diameter of the entire lens is set to 6.0 mm.
  • the length of the edge portion 210 can be appropriately adjusted.
  • the edge portion of the edge portion 210 is treated with a round of 0.3 ⁇ 0.6mm.
  • the concave surface R2 and the convex surface R3 of the lens 200 were formed from the above ⁇ Formula 1>, ⁇ Table 1> and ⁇ Table 2>.
  • the center thickness TC of the concave surface R2 and the convex surface R3 was set to 2.62 mm, and the thickness of the edge portion of the lens was set to 1.495, respectively.
  • the distance between the aperture 100 and the concave surface (R2) is 0.13mm
  • the distance from the convex surface (R3) to the infrared filter 300 is 1.1934mm
  • the thickness of the infrared filter 300 is 0.72mm
  • the The distance from the infrared filter 300 to the sensor surface 400 was set to 0.615 mm.
  • the infrared filter 300 has a refractive index of 3.421 and a dispersion of 2421.0.
  • a sensor of the sensor surface 400 may be a 34 ⁇ m sensor of 80 * 80 pixels.
  • FIG. 3 is an optical trace analysis diagram of a long-wavelength infrared camera having a horizontal angle of view of 90 degrees according to the present invention
  • FIG. 4 is a graph showing longitudinal spherical abberration of a long-wavelength infrared camera having a horizontal angle of view of 90 degrees according to the present invention.
  • FIG. 5 is an aberration analysis graph of the astigmatism of the 90-degree long-wavelength infrared camera according to the present invention
  • Figure 6 is a graph showing the distortion (distortion) of the 90-degree long-wavelength infrared camera according to the present invention
  • 7 is a graph analyzing a Modulation Transfer Function (MTF) indicating a resolution of a 90-degree long-wavelength infrared camera according to the present invention
  • FIG. 8 is a spot diagram of a 90-degree long-wavelength infrared camera according to the present invention. diagram).
  • MTF Modulation Transfer Function
  • the long-wavelength infrared camera having a horizontal angle of view of 90 degrees shows that the values of the images are shown adjacent to the central axis in almost all fields, indicating that the correction state of various aberrations is good.
  • the MTF optical required performance / resolution
  • the ratio of the amount of ambient light of the optical system of the present invention is secured by 85% or more on the basis of 0.7Field, the distortion rate is secured 27% optical system performance on the basis of 0.7Field.
  • the lens diameter is 6mm
  • the lens thickness can be produced within 2.8mm and can be applied to a variety of smart devices (cell phones, notebooks, various electronic devices, etc.).
  • the present invention is sufficiently possible to apply an optical material for molding a mold such as a non-oxide infrared optical glass, it is possible to lower the production cost compared to the conventional germanium lens and easily applied to the civilian field through mass production.

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  • 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)
  • Lenses (AREA)

Abstract

La présente invention concerne une caméra infrarouge à grande longueur d'onde à angle de champ horizontal de 90 degrés, et un objectif, l'objectif ayant un angle de champ horizontal de 90 degrés étant constitué d'un matériau optique permettant une formation de moule et comprenant : une surface concave (R2) destinée à une réfraction primaire de lumière incidente provenant d'un sujet ; et une surface convexe (R3) destinée à une réfraction secondaire de la lumière ayant traversé la surface concave (R2), la surface concave (R2) et la surface convexe (R3) étant prescrites par la relation entre les <Formule 1>, <Graphique 1> et <Graphique 2> dans la description détaillée de la présente invention.
PCT/KR2017/010283 2016-09-20 2017-09-20 Caméra infrarouge à grande longueur d'onde à angle de champ horizontal de 90 degrés, et objectif Ceased WO2018056682A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2016-0120175 2016-09-20
KR1020160120175A KR101887143B1 (ko) 2016-09-20 2016-09-20 수평화각 90도의 장파장 적외선 카메라 및 카메라용 렌즈

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WO2018056682A1 true WO2018056682A1 (fr) 2018-03-29

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PCT/KR2017/010283 Ceased WO2018056682A1 (fr) 2016-09-20 2017-09-20 Caméra infrarouge à grande longueur d'onde à angle de champ horizontal de 90 degrés, et objectif

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KR (1) KR101887143B1 (fr)
CN (1) CN107843944A (fr)
HK (1) HK1246865A1 (fr)
TW (1) TWI625969B (fr)
WO (1) WO2018056682A1 (fr)

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KR102737991B1 (ko) * 2019-08-15 2024-12-05 엘지전자 주식회사 딥러닝 기반의 세탁기의 진동 분석 방법과 그 장치
KR102299461B1 (ko) * 2020-01-10 2021-09-07 한국광기술원 이미지 영상 영역별 균일한 해상도를 갖는 화각 40도급 원적외선 광학계
CN111913240A (zh) * 2020-08-11 2020-11-10 中山北方晶华精密光学有限公司 一种手机专用光学镜片及其加工方法
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KR102694781B1 (ko) * 2022-05-27 2024-08-14 김성훈 수소 자동차 부품의 평가 방법
KR102839876B1 (ko) * 2022-11-14 2025-07-29 주식회사 카르노플릿 릴레이 브라켓을 구비하여 사용성 및 유지보수성이 극대화된 온도 리더로거, 및 이를 포함하는 신선물류 시스템
KR102691601B1 (ko) * 2023-11-28 2024-08-05 서울대학교 산학협력단 연직방향 유동에서 입자의 침강속도 변화를 측정하기 위한 수로 실험장치 및 실험방법
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KR102770068B1 (ko) * 2025-01-08 2025-02-20 주식회사 브릴스 로드셀을 이용한 접이식 시트 팝업 테스트 방법

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Publication number Publication date
KR101887143B1 (ko) 2018-09-11
CN107843944A (zh) 2018-03-27
TW201815153A (zh) 2018-04-16
HK1246865A1 (zh) 2018-09-14
TWI625969B (zh) 2018-06-01
KR20180031891A (ko) 2018-03-29

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