CN208737098U - A kind of mini-medical endoscope lens - Google Patents
A kind of mini-medical endoscope lens Download PDFInfo
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- CN208737098U CN208737098U CN201821577015.4U CN201821577015U CN208737098U CN 208737098 U CN208737098 U CN 208737098U CN 201821577015 U CN201821577015 U CN 201821577015U CN 208737098 U CN208737098 U CN 208737098U
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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 utility model 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.
Utility model content
Technical problem to be solved by the utility model is: provide it is a kind of it is small in size, production cost is low, imaging definition compared with
Good, the biggish mini-medical endoscope lens of diagonal angles of visual field range.
The technical solution of the utility model is: a kind of mini-medical endoscope lens, it is characterised in that: including from object
The front lens with negative power, the rear lens with positive light coke, imager chip that side to image space is set gradually, and under satisfaction
Column 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 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 utility model has the advantage that
The utility model mini-medical endoscope lens are only provided with two panels lens, raw so as to keep overall volume smaller
Produce that cost is relatively low, and it is negative power that front lens, which is arranged, rear lens are positive light coke, belong to it is counter take the photograph remote structure, can make diagonal
Linear field angle 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 reaches 76 °, and in the object distance range of 7-35mm can blur-free imaging, so as to meet making for medical endoscope well
Use demand.
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 the utility model mini-medical endoscope lens；
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 utility model 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.
The utility model mini-medical endoscope lens are only provided with two panels lens, and it is aspherical that lens, which are arranged, and
Traditional infrared fileter being arranged between rear lens 2 and imager chip watch crystal 3 is eliminated, and uses protection and filters
The protection glass 6 being integrated, the above reduces camera lens overall volume, production cost reduces；Setting front lens 1 is negative light
Focal power, 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, folding
The rational design of the parameters such as rate, abbe number is penetrated, diagonal angles of visual field range can be made to reach 76 °, and in the object distance model of 7-35mm
Enclose it is interior 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 |
|---|---|---|---|
| CN201821577015.4U CN208737098U (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 |
|---|---|---|---|
| CN201821577015.4U CN208737098U (en) | 2018-09-27 | 2018-09-27 | A kind of mini-medical endoscope lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208737098U true CN208737098U (en) | 2019-04-12 |
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ID=66035482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821577015.4U Active CN208737098U (en) | 2018-09-27 | 2018-09-27 | A kind of mini-medical endoscope lens |
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| CN (1) | CN208737098U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957729A (en) * | 2018-09-27 | 2018-12-07 | 上海峰梅光学科技有限公司 | A kind of mini-medical endoscope lens |
-
2018
- 2018-09-27 CN CN201821577015.4U patent/CN208737098U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957729A (en) * | 2018-09-27 | 2018-12-07 | 上海峰梅光学科技有限公司 | A kind of mini-medical endoscope lens |
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