CN106168705B - A kind of big visual field fish eye lens being mountable to gastroscope device - Google Patents

A kind of big visual field fish eye lens being mountable to gastroscope device Download PDF

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Publication number
CN106168705B
CN106168705B CN201610199568.XA CN201610199568A CN106168705B CN 106168705 B CN106168705 B CN 106168705B CN 201610199568 A CN201610199568 A CN 201610199568A CN 106168705 B CN106168705 B CN 106168705B
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China
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lens
object space
mountable
towards
visual field
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CN201610199568.XA
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CN106168705A (en
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吴学伟
吕丽军
曹一青
侍业
田林
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
    • A61B1/051—Details of CCD assembly
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/273—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the upper alimentary canal, e.g. oesophagoscopes, gastroscopes
    • A61B1/2736—Gastroscopes
    • 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
    • G02B13/0045—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 five or more lenses
    • 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

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • Surgery (AREA)
  • General Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Lenses (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

The invention discloses a kind of big visual field fish eye lenses for being mountable to gastroscope device.It includes the lens group being made of 6 lens, and 6 lens of the lens group are arranged successively from object space to image space are as follows: the first lens, the second lens, the third lens, the 4th lens, the 5th lens, the 6th lens.It is characterized in that: first lens and the second lens are lens of the convex surface with negative power towards object space concave surface towards image space；The third lens are spherical lens of the convex surface with positive light coke towards object space concave surface towards image space；4th lens are the biconvex spherical lens with positive light coke；5th lens are spherical lens of the concave surface with negative power towards object space convex surface towards image space；6th lens are the biconvex lens with positive light coke；Wherein first, second and the 6th lens towards object space one side be it is aspherical, towards image space one side be spherical surface.Camera lens has that structure is simple, field range is big, image quality is very good, the very small feature of structure size, is mountable to gastroscope device etc. in medical treatment detection.

Description

A kind of big visual field fish eye lens being mountable to gastroscope device
Technical field
The present invention relates to optical technical fields, and the application of endoscope, specifically a kind of to can be used for especially in medical treatment detection The big visual field fish eye lens of the medical device means such as gastroscope.
Technical background
Gastrocopy is a kind of reliable method for diagnosing esophagus, stomach and dudenal disease.Traditional Gastroscopy one straight The hose that diameter is one centimetre or so wraps up optical fiber, and fiber front end is equipped with endoscope.When inspection by hose from mouth through esophagus Protrude into stomach and duodenum.Since optical fiber point-to-point can only be observed, current gastroscope imaging device is caused to there is view The field disadvantage that range is too small, hose diameter is excessive, needs to control camera lens continuous adjusting angle in esophagus stomach function regulating to check comprehensively Degree.Since hose diameter is excessive, great discomfort is brought to patient when adjustment angle.
Fish eye lens is that a kind of field angle is greater than 140 °, even more than a kind of optical system of hemisphere visual field.Traditional fish Glasses head can not often get both between number of shots and image quality, when processing aspherical due to can not find it is best aspherical and The aspherical quantity for causing image quality undesirable and choosing is excessive, increases processing cost.
Summary of the invention
It is an object of the invention to be directed to the defect of prior art, a kind of big visual field fish for being mountable to gastroscope device is provided Glasses head has the characteristics that structure is simple, field range is big, good imaging quality, size are small.In order to achieve the above objectives, of the invention Design be: lens division will be carried out with the negative basic symmetrical structure of negative-positive-positive-and complicated, then found out to aberration effects Biggish surface carries out aspherical optimization.It is respectively first, second and the 6th lens direction that determining, which influences maximum three surfaces, The one side of object space, asphericity coefficient are respectively 7.113,3.872,0.988.
Conceived according to foregoing invention, adopted the following technical solutions:
A kind of big visual field fish eye lens being mountable to gastroscope device, the lens group being made of including one 6 lens, institute 6 lens for stating lens group are arranged successively from object space to image space are as follows: the first lens, the second lens, the third lens, the 4th lens, 5th lens and the 6th lens；It is characterized by: first lens and the second lens are the convex surface direction with negative power Lens of the object space concave surface towards image space；The third lens are the convex surface with positive light coke towards object space concave surface towards image space Spherical lens；4th lens are the biconvex spherical lens with positive light coke；5th lens are with negative power Spherical lens of the concave surface towards object space convex surface towards image space；6th lens are the biconvex lens with positive light coke；Its In first, second and the 6th lens towards object space one side be it is aspherical, towards image space one side be spherical surface；The aspherical knot Structure meets:.In formula,It is the radius of curvature at coordinate origin；It is face type coefficient, For、、、WithWhen, equation respectively represents flat ellipsoid, spherical surface, long ellipse Face, paraboloid and hyperboloid.
The focal length of the lens group is 0.392mm, and relative aperture F number is 2.8.
The lens group system overall length is 6.971mm, maximum gauge 5.460mm, and the full filed of the lens group is 174°。
The one side of the lens group first, second and the 6th lens towards object space be it is aspherical, asphericity coefficient is respectively 7.113、3.872、0.988 。
Refractive Index of Material n=1.6127 of first lens of lens group, Abbe number ν=58.63；The material of second lens is rolled over Penetrate rate n=1.6967, Abbe number ν=56.42；Refractive Index of Material n=1.9176 of the third lens, Abbe number ν=21.51；4th thoroughly Refractive Index of Material n=1.5225 of mirror, Abbe number ν=59.48；Refractive Index of Material n=1.5891 of 5th lens, Abbe number ν= 61.27；Refractive Index of Material n=1.4918 of 6th lens, Abbe number ν=57.44.
The present invention compared with prior art, has following obvious outstanding feature and the technological progress of significant ground:
It will be mounted on the hose of package optical fiber after lens package of the invention, hose maximum diameter control can be existed Within 6mm, and general capsule for medicine diameter is close.When carrying out gastrocopy, directly hose is protruded into, without adjusting the angle It observes front almost all visual field, has the characteristics that structure is simple, field range is big, structure size is very small.
Entire optical system glass material is followed successively by SK4(n=1.6127 from left to right), LAK31(n=1.6967), SF58 (n=1.9176), N-K5(n=1.5225), N-SK5(n=1.5891) and PMMA(n=1.4918).
Detailed description of the invention
Fig. 1 is gastroscope flexible pipe and camera lens assembling schematic diagram.
Fig. 2 is the negative basic module schematic diagram of the negative-positive-positive-with symmetrical structure.
Fig. 3 is FISH EYE LENS OPTICS system schematic.
The point range figure of this optical system when Fig. 4 is 0 °, 40 °, 85 ° of angle of half field-of view.
Fig. 5 is the field curve schematic diagram of this optical system.
Fig. 6 is the MTF curve schematic diagram of this optical system.
Specific embodiment
Details are as follows for preferred embodiment combination attached drawing of the invention:
Embodiment one:
Referring to Fig. 1 and Fig. 3, it is originally mountable to a kind of big visual field fish eye lens for being mountable to gastroscope device, including one 6 lens of the lens group being made of 6 lens, the lens group are arranged successively from object space to image space are as follows: the first lens, second Lens, the third lens, the 4th lens, the 5th lens and the 6th lens；It is characterized by: first lens and the second lens are Lens of the convex surface with negative power towards object space concave surface towards image space；The third lens are the convex surface with positive light coke Towards object space concave surface towards the spherical lens of image space；4th lens are the biconvex spherical lens with positive light coke；It is described 5th lens are spherical lens of the concave surface with negative power towards object space convex surface towards image space；6th lens be with The biconvex lens of positive light coke；Wherein first, second and the 6th lens towards object space one side be it is aspherical, towards the one of image space Face is spherical surface；The aspherical structure meets:.In formula,It is the song at coordinate origin Rate radius；It is face type coefficient, for、、、WithWhen, equation generation respectively The flat ellipsoid of table, spherical surface, prolate ellipsoid, paraboloid and hyperboloid.
Embodiment two:
Referring to Fig. 1-Fig. 6, the present embodiment is basically the same as the first embodiment, and special feature is as follows:
The focal length of the lens group is 0.392mm, and relative aperture F number is 2.8.
The lens group system overall length is 6.971mm, maximum gauge 5.460mm, and the full filed of the lens group is 174°。
The one side of the lens group first, second and the 6th lens towards object space be it is aspherical, asphericity coefficient is respectively 7.113、3.872、0.988 。
Refractive Index of Material n=1.6127 of first lens of lens group, Abbe number ν=58.63；The material of second lens is rolled over Penetrate rate n=1.6967, Abbe number ν=56.42；Refractive Index of Material n=1.9176 of the third lens, Abbe number ν=21.51；4th thoroughly Refractive Index of Material n=1.5225 of mirror, Abbe number ν=59.48；Refractive Index of Material n=1.5891 of 5th lens, Abbe number ν= 61.27；Refractive Index of Material n=1.4918 of 6th lens, Abbe number ν=57.44.
Embodiment three:
Gastroscope flexible pipe and camera lens installation diagram as shown in Figure 1, the present embodiment have light source, fish eye lens, optical fiberWith hose shell.Compared with traditional gastrocopy, use fish eye lens as endoscope, hose is directly protruded into inspection portion Position can be observed front almost all visual field without adjusting the angle, can shorten the review time, reduces patient's pain.By light guide Fiber front end is placed at this fish-eye image planes, as shown in figure 3, apart from the last one optical surface 0.875mm, optical fiber Diameter, which is set as maximum image height h=0.896mm, can be observed the object of the 174 ° of field ranges in front.
Optical system is made of 6 lens, and the lens group includes that object space to image space is arranged successively: the first lens 1, Two lens 2, the third lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6.It is characterized in that: first lens 1 and second Lens 2 are lens of the convex surface with negative power towards object space concave surface towards image space；The third lens 3 are with positive light focus Spherical lens of the convex surface of degree towards object space concave surface towards image space；4th lens 4 are the biconvex spherical surface with positive light coke Lens；5th lens 5 are spherical lens of the concave surface with negative power towards object space convex surface towards image space；Described 6th Lens 6 are the biconvex lens with positive light coke；Wherein the first lens 1, the second lens 2 and the 6th lens 6 are towards the one of object space Face be it is aspherical, towards image space one side be spherical surface.
As shown in Fig. 2, the negative symmetrical structure of negative-positive-positive-is that basic module carries out lens division complication, structure phase is obtained To simple initial configuration, and then optimization program is write according to algorithm, aspherical optimization is carried out to initial configuration, determining influences most Three big surfaces are respectively the one side of Fig. 3 the first lens 1, the second lens 2 and the 6th lens 6 towards object space, asphericity coefficient Respectively 7.113,3.872,0.988.
Optical system total focal length are as follows: EFL=0.392mm.
Optical system total length: L=6.971mm.
Full filed angle: 0 °≤2 ω≤174 °.
Dominant wavelength: 0.58756.
Relative aperture: F/#=2.8.
The structural parameters of this optical system are shown in Table 1.

Claims (5)

1. a kind of big visual field fish eye lens for being mountable to gastroscope device, the lens group being made of including one 6 lens are described 6 lens of lens group are arranged successively from object space to image space are as follows: the first lens (1), the second lens (2), the third lens (3), Four lens (4), the 5th lens (5) and the 6th lens (6)；It is characterized by: first lens (1) and the second lens (2) are Lens of the convex surface with negative power towards object space concave surface towards image space；The third lens (3) are with positive light coke Spherical lens of the convex surface towards object space concave surface towards image space；4th lens (4) are that the biconvex spherical surface with positive light coke is saturating Mirror；5th lens (5) are spherical lens of the concave surface with negative power towards object space convex surface towards image space；Described 6th Lens (6) are the biconvex lens with positive light coke；Wherein first, second and the 6th lens (1,2,6) towards the one side of object space To be aspherical, the one side towards image space is spherical surface；The aspherical structure meets:
x′2+y′2=a1z′+a2z′2 (1)
In formula, a1=2R0, R0It is the radius of curvature at coordinate origin；a2It is face type coefficient, for a2< -1, -1 < a2< 0, a2= 0 and a2When > 0, equation (1) respectively represents flat ellipsoid, prolate ellipsoid, paraboloid and hyperboloid.
2. a kind of big visual field fish eye lens for being mountable to gastroscope device as described in claim 1, it is characterised in that: described The focal length of microscope group is 0.392mm, and relative aperture F number is 2.8.
3. a kind of big visual field fish eye lens for being mountable to gastroscope device as described in claim 1, it is characterised in that: described Microscope group system overall length is 6.971mm, and maximum gauge 5.460mm, the full filed of the lens group is 174 °.
4. a kind of big visual field fish eye lens for being mountable to gastroscope device as described in claim 1, it is characterised in that: first, Second and the 6th lens (1,2,6) towards object space one side be it is aspherical, asphericity coefficient is respectively 7.113,3.872, 0.988。
5. a kind of big visual field fish eye lens for being mountable to gastroscope device as described in claim 1, it is characterised in that: first thoroughly The Refractive Index of Material n=1.6127 of mirror 1, Abbe number ν=58.63；The Refractive Index of Material n=1.6967 of second lens 2, Abbe number ν=56.42；The Refractive Index of Material n=1.9176 of the third lens 3, Abbe number ν=21.51；The Refractive Index of Material n of 4th lens 4 =1.5225, Abbe number ν=59.48；The Refractive Index of Material n=1.5891 of 5th lens 5, Abbe number ν=61.27；6th thoroughly The Refractive Index of Material n=1.4918 of mirror 6, Abbe number ν=57.44.
CN201610199568.XA 2016-04-04 2016-04-04 A kind of big visual field fish eye lens being mountable to gastroscope device Expired - Fee Related CN106168705B (en)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
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CN109620103B (en) * 2019-01-03 2023-10-27 鹰利视医疗科技有限公司 30-degree view angle 4K laparoscope objective lens
CN109984718B (en) * 2019-02-25 2021-03-23 浙江大学 Endoscope objective with ultra-large field of view
CN109884775B (en) * 2019-04-23 2020-07-31 莆田学院 Ultra-wide-angle lens system for capsule endoscope
CN111175946B (en) * 2020-03-03 2021-10-15 莆田学院 High-resolution mobile phone lens optical system
CN112649949B (en) * 2020-12-25 2022-10-11 上海大学 Simple fisheye lens comprising an aspherical lens
CN113331772B (en) * 2021-08-06 2021-11-23 深圳市资福医疗技术有限公司 Fisheye lens for capsule endoscope

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CN101285928A (en) * 2007-04-09 2008-10-15 富士能株式会社 Endoscope objective lens and endoscope
WO2009150653A1 (en) * 2008-06-12 2009-12-17 G.I. View Ltd Optical system for use in an endoscope
JP2009300796A (en) * 2008-06-13 2009-12-24 Fujinon Corp Imaging lens and capsule type endoscope
CN204790163U (en) * 2015-05-22 2015-11-18 姚鹏 Big depth of field endoscope objective in big visual field

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Publication number Priority date Publication date Assignee Title
CN101285928A (en) * 2007-04-09 2008-10-15 富士能株式会社 Endoscope objective lens and endoscope
WO2009150653A1 (en) * 2008-06-12 2009-12-17 G.I. View Ltd Optical system for use in an endoscope
JP2009300796A (en) * 2008-06-13 2009-12-24 Fujinon Corp Imaging lens and capsule type endoscope
CN204790163U (en) * 2015-05-22 2015-11-18 姚鹏 Big depth of field endoscope objective in big visual field

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