CN108957729A - A kind of mini-medical endoscope lens - Google Patents
A kind of mini-medical endoscope lens Download PDFInfo
- Publication number
- CN108957729A CN108957729A CN201811128442.9A CN201811128442A CN108957729A CN 108957729 A CN108957729 A CN 108957729A CN 201811128442 A CN201811128442 A CN 201811128442A CN 108957729 A CN108957729 A CN 108957729A
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- Prior art keywords
- lens
- mini
- medical endoscope
- focal length
- front lens
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- 239000000571 coke Substances 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 239000011521 glass Substances 0.000 claims description 7
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 abstract description 10
- 230000000007 visual effect Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000009510 drug design Methods 0.000 description 2
- 206010054949 Metaplasia Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011846 endoscopic investigation Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2407—Optical details
- G02B23/2423—Optical details of the distal end
- G02B23/243—Objectives for endoscopes
-
- 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
- A61B1/00163—Optical arrangements
- A61B1/00174—Optical arrangements characterised by the viewing angles
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Optics & Photonics (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Astronomy & Astrophysics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Biophysics (AREA)
- Molecular Biology (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Lenses (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Abstract
A kind of mini-medical endoscope lens including the front lens with negative power, the rear lens with positive light coke, imager chip set gradually from object space to image space, and meet following optical condition: -0.5 >=FBefore/F≥-1；1≥FAfterwards/F≥0.5；1.6≥Nd1≥1.55；1.55≥Nd2≥1.50；35≥Vd1≥25；60≥Vd2≥55；TTL/D<2；Wherein FBeforeFor front lens focal length value, FAfterwardsFor rear lens focal length value, F is camera lens whole focal length value, and Nd1 is front lens refractive index, and Nd2 is rear lens refractive index, and Vd1 is front lens abbe number, and Vd2 is rear lens abbe number, and TTL is camera lens overall length, and D is the Diagonal Dimension of imager chip.The mini-medical endoscope lens are small in size, production cost is low, imaging definition is preferable, diagonal angles of visual field range is larger.
Description
Technical field
The present invention relates to endoscopic technique fields, and in particular to a kind of mini-medical endoscope lens.
Background technique
Endoscope refers to be deep into human body or animal body through various pipelines, Imaging Study internal structure through imaging or
The medical instrument of pathological condition.To guarantee imaging definition and diagonal angles of visual field range, existing medical endoscope camera lens one
As all settings be greater than 2 pieces of lens.But excessive amount of lens, not only make the size of medical endoscope camera lens larger, increases
Add the pain of patient, and will increase production cost, it is especially especially prominent when being applied to disposable medical endoscope, thus
Limit being widely used on disposable medical endoscope.Therefore need to design at present a kind of small in size, imaging definition compared with
Good, the biggish mini-medical endoscope lens of diagonal angles of visual field range.
Summary of the invention
The technical problem to be solved by the present invention is providing, one kind is small in size, production cost is low, imaging definition is preferable, right
The biggish mini-medical endoscope lens of linea angulata field angle range.
The technical solution of the invention is as follows: a kind of mini-medical endoscope lens, it is characterised in that: including from object space to
The front lens with negative power that image space is set gradually, the rear lens with positive light coke, imager chip, and meet following light
Condition:
-0.5≥FBefore/F≥-1；
1≥FAfterwards/F≥0.5；
1.6≥Nd1≥1.55；
1.55≥Nd2≥1.50；
35≥Vd1≥25；
60≥Vd2≥55；
TTL/D<2；
Wherein FBeforeFor front lens focal length value, FAfterwardsFor rear lens focal length value, F is camera lens whole focal length value, and Nd1 is front lens folding
Rate is penetrated, Nd2 is rear lens refractive index, and Vd1 is front lens abbe number, and Vd2 is rear lens abbe number, and TTL is camera lens overall length,
D is the Diagonal Dimension of imager chip.
After adopting the above structure, the invention has the following advantages that
Mini-medical endoscope lens of the present invention are only provided with two panels lens, so as to keep overall volume smaller, are produced into
This is lower, and it is negative power that front lens, which is arranged, and rear lens are positive light coke, belong to it is counter take the photograph remote structure, diagonal line can be made to regard
Rink corner range is larger, in conjunction with the rational design of the parameters such as focal length, refractive index, abbe number, can make diagonal angles of visual field range
Reach 76 °, and in the object distance range of 7-35mm can blur-free imaging, so as to meet the use need of medical endoscope well
It asks.
Preferably, the front lens is the bent moon non-spherical lens for being convex to object space, the rear lens are the aspheric of biconvex
Face lens.Meniscus lens can realize negative power, and biconvex lens can realize positive light coke, and using non-spherical lens and both
The cooperation of shape further decreases camera lens overall volume.
Preferably, the front lens and rear lens are made of plastic material.Inexpensive batch metaplasia can be achieved in the setting
Produce high-precision aspherical optical element.
Preferably, further including the protection glass with infrared filtering effect before front lens is arranged in.The setting makes
Glass must be protected to have the function of to filter and protect two kinds, so as to save traditional setting in rear lens and imager chip surface
Infrared fileter between glass, so that camera lens overall volume further decreases.
Preferably, setting FBeforeFor -0.842mm, FAfterwardsIt is for 0.496mm, F 0.929mm, TTL 2.31mm, D
1.42mm.The setting is to make imaging definition and diagonal angles of visual field range under the premise of minimizing camera lens overall volume
It is optimal, is one group of optical parameter when performance is optimal.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram of mini-medical endoscope lens of the present invention；
In figure: 1- front lens, 2- rear lens, 3- imager chip watch crystal, 4- imager chip, 5- optical axis direction, 6- are protected
Protect glass, 7- diaphragm, the first surface of 8- front lens, the second curved surface of 9- front lens, TTL- camera lens overall length.
Specific embodiment
With reference to the accompanying drawing, and in conjunction with the embodiments the present invention is described further.
Embodiment:
As shown in Figure 1, a kind of mini-medical endoscope lens, have infrared absorption filter including what is set gradually from object space to image space
Protection glass 6, the front lens 1 with negative power, diaphragm 7, rear lens 2, imager chip with positive light coke of light action
Watch crystal 3, imager chip 4；The front lens 1 is the bent moon non-spherical lens for being convex to object space, and the rear lens 2 are biconvex
Non-spherical lens, bent moon non-spherical lens are bent by the lesser first surface 8 and second of two radius of curvature that front and back side is arranged in
What face 9 was constituted is substantially in the lens of crescent-shaped；The front lens 1 and rear lens 2 are made of plastic material；And meet following light
Condition:
-0.5≥FBefore/F≥-1；
1≥FAfterwards/F≥0.5；
1.6≥Nd1≥1.55；
1.55≥Nd2≥1.50；
35≥Vd1≥25；
60≥Vd2≥55；
TTL/D<2；
Wherein FBeforeFor 1 focal length value of front lens, FAfterwardsFor 2 focal length value of rear lens, F is camera lens whole focal length value, and Nd1 is front lens
1 refractive index, Nd2 are 2 refractive index of rear lens, and Vd1 is 1 abbe number of front lens, and Vd2 is 2 abbe number of rear lens, and D is imaging
The Diagonal Dimension of chip 4, the 1 focal length F of front lensBefore, 2 focal length F of rear lensAfterwards, camera lens whole focal length F, imager chip 4 pair
Diagonal dimension is normal optical parameter, and signal is no longer provided in figure, TTL is camera lens overall length, i.e. the first surface 8 of front lens 1
The center of curvature arrives the distance of imager chip 4 along optical axis direction 5, as shown in Figure 1.F is set in the present embodimentBeforeFor -0.842mm, FAfterwards
For 0.496mm, F 0.929mm, TTL 2.31mm, D 1.42mm.
Mini-medical endoscope lens of the present invention are only provided with two panels lens, and it is aspherical that lens, which are arranged, and is cancelled
The traditional infrared fileter being arranged between rear lens 2 and imager chip watch crystal 3, and use protection and filter as one
The protection glass 6 of body, the above reduces camera lens overall volume, production cost reduces；Setting front lens 1 is negative light focus
Degree, rear lens 2 be positive light coke, belong to it is counter take the photograph remote structure, diagonal angles of visual field range can be made larger, in conjunction with focal length, refraction
The rational design of the parameters such as rate, abbe number can make diagonal angles of visual field range reach 76 °, and in the object distance range of 7-35mm
Inside can blur-free imaging, the use demand of medical endoscope can be met well.
Claims (5)
1. a kind of mini-medical endoscope lens, it is characterised in that: there is negative light focus including what is set gradually from object space to image space
The front lens (1) of degree, the rear lens (2) with positive light coke, imager chip (4), and meet following optical condition:
-0.5≥FBefore/F≥-1；
1≥FAfterwards/F≥0.5；
1.6≥Nd1≥1.55；
1.55≥Nd2≥1.50；
35≥Vd1≥25；
60≥Vd2≥55；
TTL/D<2；
Wherein FBeforeFor front lens (1) focal length value, FAfterwardsFor rear lens (2) focal length value, F is camera lens whole focal length value, and Nd1 is front lens
(1) refractive index, Nd2 are rear lens (2) refractive index, and Vd1 is front lens (1) abbe number, and Vd2 is rear lens (2) abbe number,
TTL is camera lens overall length, and D is the Diagonal Dimension of imager chip (4).
2. a kind of mini-medical endoscope lens according to claim 1, it is characterised in that: the front lens (1) is convex
To the bent moon non-spherical lens of object space, the rear lens (2) are the non-spherical lens of biconvex.
3. a kind of mini-medical endoscope lens according to claim 1, it is characterised in that: the front lens (1) and after
Lens (2) are made of plastic material.
4. a kind of mini-medical endoscope lens according to claim 1, it is characterised in that: further include being arranged in front lens
(1) the protection glass (6) with infrared filtering effect before.
5. a kind of mini-medical endoscope lens according to claim 1, it is characterised in that: setting FBeforeFor -0.842mm,
FAfterwardsFor 0.496mm, F 0.929mm, TTL 2.31mm, D 1.42mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811128442.9A CN108957729A (en) | 2018-09-27 | 2018-09-27 | A kind of mini-medical endoscope lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811128442.9A CN108957729A (en) | 2018-09-27 | 2018-09-27 | A kind of mini-medical endoscope lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108957729A true CN108957729A (en) | 2018-12-07 |
Family
ID=64471922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811128442.9A Pending CN108957729A (en) | 2018-09-27 | 2018-09-27 | A kind of mini-medical endoscope lens |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009109576A (en) * | 2007-10-26 | 2009-05-21 | Fujinon Corp | Objective lens for endoscope and endoscope |
| CN202041718U (en) * | 2011-05-03 | 2011-11-16 | 凤凰光学(上海)有限公司 | Camera system of medical endoscope |
| CN102768396A (en) * | 2011-05-03 | 2012-11-07 | 凤凰光学(上海)有限公司 | Medical endoscope ultra-wide field type pick-up lens |
| CN204101801U (en) * | 2013-09-18 | 2015-01-14 | 富士胶片株式会社 | Objective lens for endoscope and introscope |
| CN204671099U (en) * | 2015-03-13 | 2015-09-30 | 厦门奇亚光电科技有限公司 | A kind of small easy endoscope head |
| CN208737098U (en) * | 2018-09-27 | 2019-04-12 | 上海峰梅光学科技有限公司 | A miniature medical endoscope lens |
-
2018
- 2018-09-27 CN CN201811128442.9A patent/CN108957729A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009109576A (en) * | 2007-10-26 | 2009-05-21 | Fujinon Corp | Objective lens for endoscope and endoscope |
| CN202041718U (en) * | 2011-05-03 | 2011-11-16 | 凤凰光学(上海)有限公司 | Camera system of medical endoscope |
| CN102768396A (en) * | 2011-05-03 | 2012-11-07 | 凤凰光学(上海)有限公司 | Medical endoscope ultra-wide field type pick-up lens |
| CN204101801U (en) * | 2013-09-18 | 2015-01-14 | 富士胶片株式会社 | Objective lens for endoscope and introscope |
| CN204671099U (en) * | 2015-03-13 | 2015-09-30 | 厦门奇亚光电科技有限公司 | A kind of small easy endoscope head |
| CN208737098U (en) * | 2018-09-27 | 2019-04-12 | 上海峰梅光学科技有限公司 | A miniature medical endoscope lens |
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