CN108051913A - A kind of endoscopic system and endoscopic camera optical system integrated design method - Google Patents
A kind of endoscopic system and endoscopic camera optical system integrated design method Download PDFInfo
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- CN108051913A CN108051913A CN201711459884.7A CN201711459884A CN108051913A CN 108051913 A CN108051913 A CN 108051913A CN 201711459884 A CN201711459884 A CN 201711459884A CN 108051913 A CN108051913 A CN 108051913A
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- objective lens
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- endoscope
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- 230000003287 optical effect Effects 0.000 title claims abstract description 137
- 238000000034 method Methods 0.000 title claims abstract description 37
- 210000001747 pupil Anatomy 0.000 claims abstract description 92
- 238000003384 imaging method Methods 0.000 claims abstract description 36
- 230000000007 visual effect Effects 0.000 claims description 8
- 239000000571 coke Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 244000144985 peep Species 0.000 description 1
- 230000002485 urinary 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
-
- 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
-
- 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
- G02B23/2476—Non-optical details, e.g. housings, mountings, supports
- G02B23/2484—Arrangements in relation to a camera or imaging device
Abstract
The present invention relates to a kind of endoscopic system and endoscopic camera optical system integrated design methods.Endoscopic system, including objective lens module, trunk module, eyepiece module, optical interface light path module and the digital ultra high-definition video camera set gradually along optical path direction, after the repeated module of objective lens module imaging and eyepiece module in a manner of non-parallel light/diverging light in the way of be projected to the optical interface light path module.The present invention reaches endoscope optical and the integrated ultrahigh resolution of wosap tv system by improving the resolution ratio of system.Resolution ratio is limited by image space angular aperture, it can be obtained by formula 2tanu '=D/f ', the relative aperture and Entry pupil diameters of system need to be improved, the opposite aperture mirror of system includes objective lens module relative aperture, the relative aperture of eyepiece relative aperture and optical interface, the all system relative apertures of relative aperture that the present invention is carried, while Entry pupil diameters and exit pupil diameter is required to improve simultaneously.It illustrates existingLaparoscope product Entry pupil diameters are generally 0.2mm~0.4mm, and exit pupil diameter is that 1mm~2mm relative apertures are 1:10, this programme totally considers system Entry pupil diameters 0.6mm, exit pupil diameter is that 3mm~6mm relative apertures are 1:4~1:6, it can realize MTF in the range of the different product full filed of 50 ° to 120 ° of field angle>The clarity of 0.2@120lp/mm (i.e. every millimeter of distinguishable 120 pairs of line).
Description
Technical field
This programme is related to a kind of endoscope optical system, more particularly to a kind of integrated endoscope and endoscope optical system
Design method.
Background technology
As science and technology develops rapidly, either in medicine technology field, such as ear endoscope, conchoscope, larynx
Sight glass, laparoscope, urinary system endoscope, gynecological endoscope, joint hysteroscope etc.；Or it is peeped in industrial circle, such as flaw detection
Mirror, detection endoscope etc., the use of endoscope all becomes more and more extensive.However, existing endoscope is almost complete in use
Be used in combination entirely with camera system, from 330 line of initial rigid endoscope camera shooting host, 430 lines, 480 lines, to 1920*
The full HD camera systems of 1080P, CMOS chip is developed to from CCD chip, has been able to reach 3840* currently with CMOS chip
21608000000 pixel 4K ultra high-definitions image standard.But endoscope optical is unable to reach ultra high-definition due to being limited by optical texture
Level has influenced general image display effect.
The content of the invention
For technical problem in the prior art, the present invention proposes a kind of endoscopic system, including along light path
Objective lens module, trunk module, eyepiece module, optical interface light path module and the digital ultra high-definition video camera that direction is set gradually,
It is characterized in that：After the repeated module of objective lens module imaging and eyepiece module in a manner of non-parallel light/diverging
The mode of light is projected to the optical interface light path module.
Endoscopic system as described above, the endoscope are rigid endoscope.
Endoscopic system as described above, the non-parallel light/diverging light is after the optical interface light path module in institute
It states and high-definition image is formed on digital camera.
Endoscopic system as described above, the image quality for the image being imaged on the digital ultra high-definition video camera are better than
The image quality for the image that the optical interface light path module is exported.
Endoscopic system as described above, the image quality for the image being imaged on the digital camera are better than being imaged on institute
State the image quality of the image on the visual face of eyepiece module.
Endoscopic system as described above, the relative aperture W=D/f ' of the system, wherein, W is relative aperture；D is whole
The Entry pupil diameters of Entry pupil diameters, that is, visual system of a system；F ' be system combined focal length, f '=(f 'o·f’C)/f’e,
In, f 'oFor the focal length of the objective lens module, f 'CFor the focal length of the optical interface light path module, f 'eFor the coke of the eyepiece
Away from.
Endoscopic system as described above, the relative aperture of the system is 1:4-1:6.
Endoscopic system as described above, the objective lens module are 0.2mm for the Entry pupil diameters of the product of different size
~1mm.
Endoscopic system as described above, the exit pupil diameter of the eyepiece module is 3mm-6mm.
Endoscopic system as described above, the Entry pupil diameters of the objective lens module are 0.2mm~1mm, the eyepiece module
Exit pupil diameter be 3mm-6mm.
Endoscopic system as described above, the system are used for spherical surface or aspherical endoscope.
Endoscopic system as described above, the system for a diameter of 1.9mm, 2.7mm of appearance, 4mm, 5mm, 6mm,
The endoscope of 8mm, 10mm
Endoscopic system as described above, the viewing directional angle of the system can be 0 °, 30 °, 45 ° or 70 ° or more.
Endoscopic system as described above, objective lens module described in the system to the eyepiece module can be arbitrarily long
Degree.
According to another aspect of the present invention, it is proposed that a kind of endoscopic camera optical system integrated design method,
The system comprises set gradually along optical path direction objective lens module, trunk module, eyepiece module, optical interface light path module and
Digital ultra high-definition video camera improves the relative aperture of the system by improving the exit pupil diameter of the eyepiece module, so as to
Improve the resolution ratio for the image being imaged on the digital ultra high-definition video camera.
Design method as described above, the exit pupil diameter of the eyepiece module are improved to 3mm-6mm.
Design method as described above is imaged on the number by improving the Entry pupil diameters of the objective lens module to improve
The resolution ratio of image on camera.
Design method as described above, the Entry pupil diameters of the objective lens module are improved to 0.2mm~1mm.
Design method as described above, while the exit pupil diameter of the eyepiece module is improved to 3mm-6mm, the object lens
The Entry pupil diameters of module are improved to 0.2mm~1mm.
Design method as described above, the relative aperture W=D/f ' of the system, wherein, W is relative aperture；D is entire
The Entry pupil diameters of Entry pupil diameters, that is, visual system of system；F ' be system combined focal length, f '=(f 'o·f’C)/f’e, wherein,
f’oFor the focal length of the objective lens module, f 'CFor the focal length of the optical interface light path module, f 'eFor the focal length of the eyepiece..
Design method as described above, the relative aperture of the system is 1:4-1:6.
Design method as described above, the design method are used for rigid endoscope.
Design method as described above, the design method are used for spherical surface or aspherical endoscope.
Design method as described above, the system for a diameter of 1.9mm, 2.7mm of appearance, 4mm, 5mm, 6mm, 8mm,
The endoscope of 10mm
Design method as described above, the viewing directional angle of the system can be 0 °, 30 °, 45 ° or 70 ° or more
Design method as described above, objective lens module described in the system to the eyepiece module can be arbitrarily long
Degree.
According to another aspect of the present invention, a kind of endoscope for endoscopic system as described above, bag are proposed
Include the objective lens module, the trunk module and the eyepiece module.
According to another aspect of the present invention, a kind of endoscope for endoscopic system as described above, bag are proposed
Include the objective lens module, the trunk module, the eyepiece module and the optical interface light path module.
According to another aspect of the present invention, propose that a kind of optics for endoscopic system as described above is adapted to connect
Mouthful, including the optical interface light path module.
The present invention improves whole relative aperture by improving the Entry pupil diameters and exit pupil diameter of endoscope optical system,
Resolution ratio is improved, endoscopic system is integrally considered to design global optimization, without considering the image quality of each section.
Description of the drawings
In the following, the preferred embodiment of the present invention will be described in more detail with reference to attached drawing, wherein：
Fig. 1 is the schematic diagram of endoscope optical system according to an embodiment of the invention.
Fig. 2 is the schematic diagram of endoscope optical system according to an embodiment of the invention.
Fig. 3 is the objective lens module schematic diagram of endoscope optical system according to an embodiment of the invention.
Fig. 4 is the schematic diagram of the trunk module of endoscope optical system according to an embodiment of the invention.
Fig. 5 is the schematic diagram of the field lens of endoscope optical system according to an embodiment of the invention.
Fig. 6 is the schematic diagram of the eyepiece of endoscope optical system according to an embodiment of the invention.
Fig. 7 is the schematic diagram of optical interface light path module according to an embodiment of the invention.
Fig. 8 is that the endoscopic system MTF of one embodiment of the present of invention schemes.
Fig. 9 is that the objective lens module of one embodiment of the present of invention and trunk module entirety MTF scheme.
Figure 10 is that the eyepiece MTF of one embodiment of the present of invention schemes.
Figure 11 is the optical interface optical MTF figure of one embodiment of the present of invention.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without making creative work belong to the scope of protection of the invention.
In the following detailed description, it may refer to be used for the specific embodiment for illustrating the application as the application part
Each Figure of description.In the accompanying drawings, similar reference numeral describes substantially similar component in different drawings.This Shen
Each specific embodiment please has carried out description detailed enough following so that possesses the general of ability domain-dependent knowledge and technology
Logical technical staff can implement the technical solution of the application.It should be appreciated that other embodiments can also be utilized or to the application
Embodiment carry out the change of structure, logic or characteristic.
The present invention proposes a kind of brand-new endoscope integrated optical system, can increase substantially the resolution of endoscope
Rate；Also, in some embodiments of the invention, the cost of endoscope can't significantly improve.
Fig. 1 is the schematic diagram of endoscope optical system according to an embodiment of the invention.As shown in the figure, endoscopic system
100 include：Objective lens module 101, trunk module 102, eyepiece module 103, optical interface light path module 104 and imaging device
105.Imaging device 105 can be digital ultra high-definition video camera.Objective lens module 101 can include entrance pupil 106 and multiple lens, use
It is imaged in treating viewing area.Entrance pupil 106 can be analogous to diaphragm, for limiting the light into objective lens module.Relay mould
Block 102 includes multiple lens, for being repeatedly imaged to the light that objective lens module is imaged, so as to transfer objective lens module imaging.Mesh
Mirror module 103 includes multiple lens, for amplifying the picture received from trunk module 102.Eyepiece module 103 includes emergent pupil 107.Light
Learning interface light path module 104 includes multiple lens, for will the imaging image formation by rays from eyepiece module 103 to imaging device
On 105 imaging surface.The closely eyepiece module 103, therefore the emergent pupil 107 of eyepiece module 103 also may be used of optical interface light path module 104
Using the entrance pupil as optical interface light path module.Further, endoscope can include display 108, carry out self-contained for showing
As the image of device 106.
It will be appreciated by those skilled in the art that since optical interface light path module 104 is adapted to imaging device 105.One
In a little embodiments, in the case where the parameter of optical interface light path module 104 and imaging device 105 provides, the optics of endoscope
System can only include objective lens module 101, trunk module 102 and eyepiece module 103.Designer is according to optical interface light path
Module 104 and parameter designing objective lens module 101, trunk module 102 and the eyepiece module 103 of imaging device 105.Therefore, inside peep
The optical system of mirror does not include optical interface light path module 104 and the situation of imaging device 105 is also included within protection of the invention
Among scope.Further, objective lens module 101, trunk module 102 and eyepiece can only be included in the optical system of endoscope
In the case of module 103, in the case where imaging device 105 is given, designer can only design optical interface light path module 104
And optical interface light path module 104 is provided separately.Therefore, optical interface light path module 104 is also in protection scope of the present invention
Among.
In the design of existing endoscope optical system, objective lens module 102 and trunk module 103 are set as an entirety
Meter and detection；Eyepiece module 104 is designed separately and detects.Optical interface light path module 104 is according to the emergent pupil of eyepiece module 103
It is designed with visual field and imaging device 105, to ensure the image quality on the imaging surface of imaging device 105.This field
Technical staff has had attempted to long time and has wished by improving objective lens module 102 and trunk module 103, eyepiece module 104
Or the design of optical interface light path module 104 improves the quality of imaging, but does not all take to increase the resolution ratio of endoscope
It must succeed.
In order to illustrate the structure of endoscope optical system of the present invention, new parameter is defined：Whole relative aperture W, wherein
W=D/f ' (1)
Wherein, W is relative aperture.D is the Entry pupil diameters of optical system；Specifically, D can be entering for objective lens module 101
The diameter of pupil 106.F ' is the combined focal length of optical system, meets and is defined as below：
F '=(f 'o·f’C)/f’e (2)
Wherein, f 'oFor the focal length of the objective lens module 101, f 'CFor the focal length of the optical interface light path module 104, f 'e
For the focal length of the eyepiece module 103.
For optical system, resolution ratio can be determined by image space angular aperture (here shown as u ').In general, picture
The square bigger resolution ratio of angular aperture is higher.Image space angular aperture u ' meets equation below：
2tanu '=DC/f’C (3)
Wherein, DCThe entrance pupil of optical interface light path module 104.f’CThe focal length of optical interface light path module 104.Due to optics
The entrance pupil 108 of interface light path module 104 is the emergent pupil D ' of entire endoscope optical system, therefore has equation below：
Dc=D ' (4)
Thus, it is possible to obtain equation below：
2tanu '=D '/f 'C (5)
Due to the invertibity of light path, the optical system of endoscope can approximation see inverted telescope as.Therefore, just like
Under formula：
D’/f’C=D/f ' (6)
Thus, it is possible to obtain formula
2tanu '=D/f ' (7)
It can be seen that the relative aperture W of optical system is bigger, image space angular aperture u ' is bigger, and the resolution ratio of optical system is got over
It is high.
According to one embodiment of present invention, the scope of whole relative aperture W is 1:4-1:6.It illustrates existingAbdomen
Hysteroscope product Entry pupil diameters are generally 0.2mm~0.4mm, and exit pupil diameter is that 1mm~2mm relative apertures are 1:10.In the present invention
Some embodiments in, Entry pupil diameters 0.6mm, exit pupil diameter be 3mm~6mm, relative aperture 1:4~1:6, it can realize
MTF in the range of the different product full filed of 50 ° to 120 ° of field angle>0.2@120lp/mm (i.e. every millimeter of distinguishable 120 pairs of line)
Clarity.
Further, according to formula (1), the entrance pupil 107 for improving the objective lens module 101 of optical system is conducive to improve optics
The resolution ratio of system.According to one embodiment of present invention, the objective lens module is for the Entry pupil diameters of the product of different size
For 0.2mm~1mm.
As described above, from the angle of optical system, the optical system of endoscope can approximation see inverted telescope as.
The emergent pupil D ' of eyepiece module 103 meets the following formula：
D '=Df 'e/f’o (8)
Wherein, D ' is the exit pupil diameter of optical system.D is the Entry pupil diameters of optical system.f’oFor the objective lens module
101 focal length, f 'CFor the focal length of the optical interface light path module 104, f 'eFor the focal length of the eyepiece module 103.
Reference formula (2), in the case where D is constant, D ' is bigger, f 'e/f’oIt is bigger.In general, optical interface light path mould
The focal length of block 104 is constant, then f '=(f 'o·f’C)/f’eIt is smaller, therefore W=D/f ' is bigger.
Therefore, the exit pupil diameter D ' of optical system is increased, i.e. the exit pupil diameter of eyepiece module is conducive to point of raising system
Resolution.
According to one embodiment of present invention, the exit pupil diameter of the eyepiece module is 3mm-6mm.
According to one embodiment of present invention, the size of entrance pupil 106 and emergent pupil 107 influences the resolution of endoscope optical system
Rate.But entrance pupil or emergent pupil are excessive, the veiling glare of introducing is excessive, as clarity and resolution ratio can also be affected.According to this
One embodiment of invention, the Entry pupil diameters of the objective lens module are 0.2mm~1mm, and the exit pupil diameter of the eyepiece module
For 3mm-6mm.
The present invention can be seen that by above description and abandoned objective lens module 102 and trunk module 103, eyepiece module
104 or the shortcomings that separately designing of optical interface light path module 104, integrated design philosophy is employed, is taken into full account
The invertibity of light path can greatly improve the resolution ratio of endoscope.In some embodiments of the invention, using light of the present invention
The clarity of the endoscope of system can reach MTF>0.2@120lp/mm；And the optical system of the present invention is almost without increasing
Add any cost, so as to solve the problems, such as long-term unsolved raising endoscope resolution ratio in this field.
Further, the solution of the present invention does not impact other aspects of endoscope optical system.According to this hair
Bright one embodiment, endoscope optical system are used for spherical surface or aspherical endoscope.According to one embodiment of present invention, it is interior
Sight glass optical system is used for the endoscope of appearance a diameter of 1.9mm, 2.7mm, 4mm, 5mm, 6mm, 8mm, 10mm.According to the present invention
One embodiment, the viewing directional angle of endoscope optical system can be 0 °, 30 °, 45 ° or 70 ° or more.According to the present invention one
A embodiment, objective lens module described in endoscope optical system to the eyepiece module can be random length.
Illustrated below by the endoscopic system of 30 ° of viewing directional angle of the present invention, and with existing endoscopic optical
System carries out some and compares, preferably to show the features of the present invention.It will be appreciated by those skilled in the art that the present embodiment is only
It is for illustrating the scope of technical scheme and is not intended to limit the present invention.
Fig. 2 is the schematic diagram of endoscope optical system according to an embodiment of the invention.Fig. 3 is one according to the present invention
The objective lens module schematic diagram of the endoscope optical system of embodiment.Fig. 4 is endoscopic optical according to an embodiment of the invention
The schematic diagram of the trunk module of system.Fig. 5 is the signal of the field lens of endoscope optical system according to an embodiment of the invention
Figure.Fig. 6 is the schematic diagram of the eyepiece module of endoscope optical system according to an embodiment of the invention.Fig. 7 is according to this hair
The schematic diagram of the optical interface light path module of bright one embodiment.
In the present embodiment, the relative aperture of existing endoscope is 1:8~1:10 cannot reach the resolution ratio of high definition.This implementation
The relative aperture of example is 1:4.5, relative illumination can reach 2~4 times of existing endoscope.Specifically, existing endoscope enters
A diameter of 0.2mm~the 0.4mm of pupil, the Entry pupil diameters of the present embodiment are 0.6mm, and 30 ° of steering prisms are launched into tablet entrance pupil position
It puts after first negative lens at 2mm.In the present embodiment, existing endoscope exit pupil diameter is 1mm~2mm, and the present embodiment goes out
The a diameter of 5mm of pupil, exit pupil position is after eyepiece module is walked after piece eyeglass at 4mm.In the present embodiment, optical interface optical mode
The Entry pupil diameters of block are 5mm, and entrance pupil position is consistent with the exit pupil position of eyepiece module.In the present embodiment, endoscope can be with
Realize the direction of observation of 30 ° of viewing directional angle, the range of observation that 70 ° of field angle.
Specifically, as shown in Fig. 2, the entrance pupil 01 of the optical system of endoscope including objective lens module, objective lens module 02, in
After module 03, field lens 04, field stop, eyepiece module 05, optical interface light path module 06 and the CCD (CMOS) for imaging.
Fig. 3 shows the composition of objective lens module and light path therein.As shown in the figure, objective lens module includes 2 single element lens, 1 turns
To prism, 1 three cemented doublet and 3 double cemented doublets.By the objective lens module of optical system, region to be seen is passed through
After objective lens module can into clearly as.
Fig. 4 shows trunk module and light path therein.As shown in the figure, trunk module includes 3 groups of identical image rotation groups, often
One image rotation group includes 2 cemented doublets.By the multiple imaging of trunk module, objective lens module imaging, which realizes, to be relayed
Mould transmission in the block.The trunk module of the optical system of the present invention can include any number of image rotation group, therefore, objective lens module
Can be random length to the eyepiece module.
Fig. 5 shows field lens and field stop and relevant light paths.After field lens is arranged on last group of eyeglass of trunk module
At a certain distance from, the picture transferred to relaying is turned back, and reduces eyepiece modular optical system and optical interface light path module
Bore.A diameter of 4.1mm of field stop in the present embodiment, the size for limiting visual field are 75 °.Fig. 6 show eyepiece module and
Light path therein.As shown in the figure, eyepiece module includes 2 double cemented doublets.In the present embodiment, the entrance pupil of eyepiece module is straight
Footpath is 5 millimeters, is arranged on after last group of eyeglass of eyepiece module at 4mm.As shown in fig. 6, the light being emitted from eyepiece module is
Diverging/nonparallel rather than directional light.It is generally believed that eyepiece module outgoing directional light is more reasonably to select, however press
According to the optical system of the present invention, the light being emitted from eyepiece module is non-directional light, and this would be even more beneficial to improve endoscope light
The resolution ratio of system.Fig. 7 shows optical interface light path module and light path therein.As shown in the figure, optical interface light path mould
Block includes 3 double cemented doublets.It should be noted that in Fig. 6 the emergent pupil of eyepiece module be in Fig. 7 optical interface light path module enter
Pupil.By optical interface light path module later from the light of eyepiece module on imaging surface into high-definition image.
So-called high-definition image, resolution ratio MTF>More than 0.2@40lp/mm, MTF>More than 0.2@50lp/mm, MTF>
More than 0.2@60lp/mm, MTF>More than 0.2@70lp/mm, MTF>More than 0.2@80lp/mm, MTF>More than 0.2@90lp/mm,
MTF>More than 0.2@100lp/mm, MTF>More than 0.2@110lp/mm, MTF>More than 0.2@120lp/mm, MTF>0.2@130lp/
More than mm, MTF>More than 0.2@140lp/mm or MTF>More than 0.2@150lp/mm.
Fig. 8 is that the endoscopic system MTF of one embodiment of the present of invention schemes.In the present embodiment, the resolution of optical system
Rate can be up to MTF>0.2@120lp/mm.Further, Fig. 9 is that the objective lens module of one embodiment of the present of invention is whole with relaying
Body MTF schemes.Figure 10 is that the eyepiece module MTF of one embodiment of the present of invention schemes.Figure 11 is the light of one embodiment of the present of invention
Learn interface optical MTF figure.
It is worth noting that, in the present embodiment, with reference to figure 9, the image quality of objective lens module mirror is only to reach MTF>
0.2@40lp/mm.In the present embodiment, with reference to figure 10, the image quality of eyepiece module also only just reaches MTF>0.2@20lp/
mm.However, in the present embodiment, with reference to figure 11, but reach unexpected MTF in the image quality of optical interface light path module
>0.1@120lp/mm.That is, the image quality for the image being imaged on imaging device imaging surface is better than objective lens module in
The image quality for the image that grade optics group or eyepiece module or optical interface light path module are individually exported.Objective lens module
With trunk module, eyepiece module, the optical transfer function of optical interface light path module need not individually consider image quality, but whole
Bulk optics transmission function (such as Fig. 8) can reach design requirement.
According to one embodiment of present invention, a kind of integrated design method of endoscope optical system is proposed.It is described to set
Meter method can be applied in optical system as above, and the optical system includes the object lens mould set gradually along optical path direction
Block, trunk module and eyepiece module, the described method includes：The exit pupil diameter of the eyepiece module is improved to improve the system
Relative aperture；Alternatively, the Entry pupil diameters of the objective lens module are improved to improve the relative aperture of the system.In some implementations
In example, the exit pupil diameter of the eyepiece module is 3mm-6mm.In further embodiments, the Entry pupil diameters of the objective lens module
For 0.2mm~1mm.
According to one embodiment of present invention, can select to improve the exit pupil diameter of the eyepiece module and the object simultaneously
The Entry pupil diameters of mirror module improve the relative aperture of the system.In some embodiments, the Entry pupil diameters of objective lens module are
0.2mm~1mm, the exit pupil diameter of eyepiece module is 3mm-6mm.
Further, according to one embodiment of present invention, the optical system further comprises along optical path direction successively
The optical interface light path module and imaging device of setting, wherein optical interface light path module closely eyepiece module.The method into
One step includes：The relative aperture for setting the system is 1:4-1:6, wherein the relative aperture W=D/f ' of the system, wherein, W
For relative aperture；D is the Entry pupil diameters of optical system；F ' be optical system combined focal length, f '=(f 'o·f’C)/f’e,
In, f 'oFor the focal length of the objective lens module, f 'CFor the focal length of the optical interface light path module, f 'eFor the eyepiece module
Focal length.
According to one embodiment of present invention, the system is used for spherical surface or aspherical endoscope optical system.According to this
One embodiment of invention, the system are peeped for the interior of appearance a diameter of 1.9mm, 2.7mm, 4mm, 5mm, 6mm, 8mm, 10mm
Mirror optical system.According to one embodiment of present invention, the viewing directional angle of the system can be 0 °, 30 °, 45 ° or 70 ° with
On.According to one embodiment of present invention, objective lens module is to can be random length between eyepiece module.
According to one embodiment of present invention, it is proposed that a kind of endoscope, including：Endoscopic optical system as described above
System；Or the endoscope optical system designed by design method as described above.According to one embodiment of present invention, in described
Sight glass is rigid endoscope.
According to one embodiment of present invention, it is proposed that a kind of manufacturing method of endoscope includes the following steps：Edge is provided
Objective lens module, trunk module, eyepiece module, optical interface light path module and the imaging device of optical path direction；The eyepiece is set
The Entry pupil diameters of the exit pupil diameter of module or the objective lens module are to have the relative aperture of the system of raising；And it adjusts
One or more of whole objective lens module, trunk module, eyepiece module, optical interface light path module are so that region to be seen exists
Into high-definition image on the imaging surface of imaging device.
According to one embodiment of present invention, the resolution ratio of the high-definition image is MTF>More than 0.2@40lp/mm, MTF>
More than 0.2@50lp/mm, MTF>More than 0.2@60lp/mm, MTF>More than 0.2@70lp/mm, MTF>More than 0.2@80lp/mm,
MTF>More than 0.2@90lp/mm, MTF>More than 0.2@100lp/mm, MTF>More than 0.2@110lp/mm, MTF>0.2@120lp/
More than mm, MTF>More than 0.2@130lp/mm, MTF>More than 0.2@140lp/mm or MTF>More than 0.2@150lp/mm.
According to one embodiment of present invention, it is proposed that a kind of manufacturing method of endoscope optical system, including：Edge is provided
The objective lens module of optical path direction, trunk module, eyepiece module；The optical interface light path module being adapted to the optical system is provided
With the parameter of imaging device；The exit pupil diameter of the eyepiece module or the Entry pupil diameters of the objective lens module is set to be carried to have
The relative aperture of the high system；And adjustment objective lens module, trunk module, one or more of eyepiece module so that
It region to be seen can be in the light of the adaptation after trunk module and the outgoing of eyepiece module by objective lens module imaging
Into high-definition image on the imaging surface of imaging device defined in interface light path module and the parameter of imaging device.
According to one embodiment of present invention, the resolution ratio of the high-definition image is MTF>More than 0.2@40lp/mm, MTF>
More than 0.2@50lp/mm, MTF>More than 0.2@60lp/mm, MTF>More than 0.2@70lp/mm, MTF>More than 0.2@80lp/mm,
MTF>More than 0.2@90lp/mm, MTF>More than 0.2@100lp/mm, MTF>More than 0.2@110lp/mm, MTF>0.2@120lp/
More than mm, MTF>More than 0.2@130lp/mm, MTF>More than 0.2@140lp/mm or MTF>More than 0.2@150lp/mm.
According to one embodiment of present invention, it is proposed that a kind of optical interface light path mould for endoscope optical system
Block, including multiple lens, the multiple lens receive region to be seen through objective lens module imaging in trunk module and mesh
After mirror module in a manner of non-parallel light/diverging light in the way of the light that is emitted and emergent ray in the imaging surface of imaging device
On into high-definition image.
According to one embodiment of present invention, the resolution ratio of the high-definition image is MTF>More than 0.2@40lp/mm, MTF>
More than 0.2@50lp/mm, MTF>More than 0.2@60lp/mm, MTF>More than 0.2@70lp/mm, MTF>More than 0.2@80lp/mm,
MTF>More than 0.2@90lp/mm, MTF>More than 0.2@100lp/mm, MTF>More than 0.2@110lp/mm, MTF>0.2@120lp/
More than mm, MTF>More than 0.2@130lp/mm, MTF>More than 0.2@140lp/mm or MTF>More than 0.2@150lp/mm.
The present invention endoscope optical system and endoscope be change light path by raising system entirety relative aperture
System resolution ratio, and this raising relative aperture designing scheme, can not only be applied to 30 ° of laparoscopesIn, also may be used
To be applied to It is straight etc. various appearances
In footpath and various endoscope lengths and in various viewing directional angles, such as diameter listed above is not limited to for 0 °, 30 °, 45 °, 70 °
Specification, length specification, viewing directional angle specification.Such as：0 ° of laparoscope, 30 °, diameter 10mm, diameter 5mm or 4mm hysteroscopes, bladders
The rigid endoscopes such as mirror, arthroscope, nasal endoscopes, laryngendoscope, endotoscpe, foramen intervertebrale lens.The endoscope of the present invention can be used for
Industrial circle.
Above-described embodiment is used for illustrative purposes only, and is not limitation of the present invention, in relation to the general of technical field
Logical technical staff without departing from the present invention, can also make a variety of changes and modification, therefore, all equivalent
Technical solution should also belong to scope disclosed by the invention.
Claims (29)
1. a kind of endoscopic system, including objective lens module, trunk module, eyepiece module, the light set gradually along optical path direction
Learn interface light path module and digital ultra high-definition video camera, it is characterised in that：The repeated module of objective lens module imaging
With after eyepiece module in a manner of non-parallel light/diverging light in the way of be projected to the optical interface light path module.
2. endoscopic system according to claim 1, it is characterised in that：The endoscope is rigid endoscope.
3. endoscopic system according to claim 1, it is characterised in that：Non-parallel light/the diverging light is through the optics
After interface light path module high-definition image is formed on the digital camera.
4. endoscopic system according to claim 3, it is characterised in that：It is imaged on the digital ultra high-definition video camera
The image quality of image is better than the image quality for the image that the optical interface light path module is exported.
5. endoscopic system according to claim 3, it is characterised in that：Be imaged on the image on the digital camera into
Image quality amount is better than the image quality for the image being imaged on the visual face of the eyepiece module.
6. according to claim 1-5 any one of them endoscopic systems, it is characterised in that：The relative aperture W=of the system
D/f ', wherein, W is relative aperture；D is the Entry pupil diameters of Entry pupil diameters, that is, visual system of whole system；F ' is the group of system
Complex focus, f '=(f 'o·f’C)/f’e, wherein, f 'oFor the focal length of the objective lens module, f 'CFor the optical interface light path mould
The focal length of block, f 'eFor the focal length of the eyepiece.
7. endoscopic system according to claim 6, it is characterised in that：The relative aperture of the system is 1:4-1:6.
8. according to claim 1-5 any one of them endoscopic systems, it is characterised in that：The objective lens module is directed to different rule
The Entry pupil diameters of the product of lattice are 0.2mm~1mm.
9. according to claim 1-5 any one of them endoscopic systems, it is characterised in that：The exit pupil diameter of the eyepiece module
For 3mm-6mm.
10. according to claim 1-5 any one of them endoscopic systems, it is characterised in that：The entrance pupil of the objective lens module is straight
Footpath is 0.2mm~1mm, and the exit pupil diameter of the eyepiece module is 3mm-6mm.
11. according to claim 1-5 any one of them endoscopic systems, it is characterised in that：The system is used for spherical surface or non-
Spherical surface endoscope.
12. according to claim 1-5 any one of them endoscopic systems, it is characterised in that：The system is used for appearance diameter
For the endoscope of 1.9mm, 2.7mm, 4mm, 5mm, 6mm, 8mm, 10mm.
13. according to claim 1-5 any one of them endoscopic systems, it is characterised in that：The viewing directional angle of the system can be with
For 0 °, 30 °, 45 ° or 70 ° or more.
14. according to claim 1-5 any one of them endoscopic systems, it is characterised in that：Object lens mould described in the system
Block to the eyepiece module can be random length.
15. a kind of endoscopic camera optical system integrated design method, the system comprises set gradually along optical path direction
Objective lens module, trunk module, eyepiece module, optical interface light path module and digital ultra high-definition video camera, it is characterised in that：It is logical
It crosses and improves the exit pupil diameter of the eyepiece module to improve the relative aperture of the system, to be imaged on the number super so as to improve
The resolution ratio of image on high-definition camera.
16. design method according to claim 15, it is characterised in that：The exit pupil diameter of the eyepiece module improve to
3mm-6mm。
17. design method according to claim 15, it is characterised in that：By the Entry pupil diameters for improving the objective lens module
To improve the resolution ratio for the image being imaged on the digital camera.
18. design method according to claim 15, it is characterised in that：The Entry pupil diameters of the objective lens module improve to
0.2mm~1mm.
19. design method according to claim 15, it is characterised in that：The exit pupil diameter of the eyepiece module improve to
While 3mm-6mm, the Entry pupil diameters of the objective lens module are improved to 0.2mm~1mm.
20. design method according to claim 15, it is characterised in that：The relative aperture W=D/f ' of the system,
In, W is relative aperture；D is the Entry pupil diameters of Entry pupil diameters, that is, visual system of whole system；F ' is the combined focal length of system,
F '=(f 'o·f’C)/f’e, wherein, f 'oFor the focal length of the objective lens module, f 'CFor the coke of the optical interface light path module
Away from f 'eFor the focal length of the eyepiece..
21. design method according to claim 20, it is characterised in that：The relative aperture of the system is 1:4-1:6.
22. according to claim 15-21 any one of them design methods, it is characterised in that：The design method is used for hard
Endoscope.
23. according to claim 15-21 any one of them design methods, it is characterised in that：The design method is used for spherical surface
Or aspherical endoscope.
24. according to claim 15-21 any one of them design methods, it is characterised in that：The system is used for appearance diameter
For the endoscope of 1.9mm, 2.7mm, 4mm, 5mm, 6mm, 8mm, 10mm.
25. according to claim 15-21 any one of them design methods, it is characterised in that：The viewing directional angle of the system can be with
For 0 °, 30 °, 45 ° or 70 ° or more.
26. according to claim 15-21 any one of them design methods, it is characterised in that：Object lens mould described in the system
Block to the eyepiece module can be random length.
27. a kind of endoscope for claim 1-14 any one of them endoscopic systems, including the objective lens module,
The trunk module and the eyepiece module.
28. a kind of endoscope for claim 1-14 any one of them endoscopic systems, including the objective lens module,
The trunk module, the eyepiece module and the optical interface light path module.
29. a kind of optics adaptable interface for claim 1-14 any one of them endoscopic systems, including the light
Learn interface light path module.
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| CN201711459884.7A CN108051913A (en) | 2017-12-28 | 2017-12-28 | A kind of endoscopic system and endoscopic camera optical system integrated design method |
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| CN201711459884.7A CN108051913A (en) | 2017-12-28 | 2017-12-28 | A kind of endoscopic system and endoscopic camera optical system integrated design method |
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