CN110412759A - A kind of zoomable electronic eyepiece adapter of limited remote conjugate distance microscope - Google Patents
A kind of zoomable electronic eyepiece adapter of limited remote conjugate distance microscope Download PDFInfo
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- 238000003384 imaging method Methods 0.000 claims abstract description 35
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 230000005499 meniscus Effects 0.000 claims description 28
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 210000001747 pupil Anatomy 0.000 abstract description 2
- 230000003321 amplification Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 230000004075 alteration Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 206010027146 Melanoderma Diseases 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 238000000386 microscopy Methods 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
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- 238000009738 saturating Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/36—Microscopes arranged for photographic purposes or projection purposes or digital imaging or video purposes including associated control and data processing arrangements
- G02B21/361—Optical details, e.g. image relay to the camera or image sensor
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
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Abstract
The invention discloses a kind of limited remote conjugate distance microscope zoomable electronic eyepiece adapter, including field lens and zooming system, object is by intermediary image formed by microcobjective by zooming system secondary imaging to imaging sensor after field lens receives light；The zooming system includes the zoom group, fixed group and compensation group along optical axis arrangement；The zoom group and fixed group, compensation group and the spacing of fixed group are adjustable, for realizing continuous zoom function.The present invention reduces the radial dimension of adapter using field lens, will quickly collapse to the light of external diffusion, and realizes that the pupil of front and back system is connected to reduce the clear aperture of adapter, while can realize continuous zoom, and various sizes of imaging sensor can be cooperated to use.
Description
Technical field
The invention belongs to digital microscopy systems or device fields, use more particularly, to a kind of limited remote conjugate distance microscope
Zoomable electronic eyepiece adapter.
Background technique
Eyepiece is a component part of optical visual instrument, and effect is that object lens imaging is imaged on nothing by it
It limits remote (or distance of distinct vision), then passes through the eye imaging of observer in retina.The enlargement ratio of traditional eyepiece is fixed, and
By human eye direct viewing.Digit microscope is then to receive microscope imaging by imaging sensor, by aobvious after processing
Show that device is watched for user, so digit microscope must be by positive lens groups into real image.
The Chinese patent literature of Publication No. CN201344999Y discloses a kind of 30 times electronic eyepiece of optical microscope, packet
Sequentially connected eyepiece stalk and connect cylinder are included, the front end of the eyepiece stalk is provided with ocular lens I, and the rear end of the eyepiece stalk is provided with
Ocular lens II, the connect cylinder are internally provided with image sensor chip, which is set by ocular lens I's and ocular lens II
It sets, target can be amplified 30 times.
The Chinese patent literature of Publication No. CN201345001Y discloses a kind of groups of electronic eyeglass for optical microscope lens group,
Suitable for by image objects on photosensitive element, from initial imaging plane to successively including first to the 6th thoroughly between photosensitive element
Microscope group, the patent must be designed using 86 groups, and the increase of number of lenses improves the performance of optical system, preferably eliminate by
The brings Aberration Problem such as spherical aberration, coma, distortion, color difference, astigmatism, the image image quality collected are preferable.
Existing electronic eyepiece adapter is also limited to fixed multiplying power, causes Single Electron eyepiece adapter that can only match certain
The imaging sensor of one size needs replacing the electronics mesh of different enlargement ratios when using various sizes of imaging sensor
Mirror adapter, operation are not convenient enough.
Imaging sensor is constantly developing to large scale direction at present, and existing electronic eyepiece adapter can matched image
Size sensor is smaller, is not available large-size images sensor to receive image and carry out subsequent processing.So needing at present
A kind of zoomable electronic eyepiece adapter of limited remote conjugate distance microscope.
Summary of the invention
For the problem that existing microscope electron eyepiece adapter multiplying power is fixed, the present invention provides a kind of limited remote conjugation
Away from the zoomable electronic eyepiece adapter of microscope, it can be achieved that continuous zoom function, reaches same adapter and match different sizes
Imaging sensor purpose.
Technical scheme is as follows:
A kind of limited remote conjugate distance microscope zoomable electronic eyepiece adapter, including field lens and zooming system, object
By intermediary image formed by microcobjective by zooming system secondary imaging to imaging sensor after field lens receives light；
The zooming system includes the zoom group, fixed group and compensation group along optical axis arrangement；The zoom group and fixed group,
Compensation group and the spacing of fixed group are adjustable, for realizing continuous zoom function.
In electronic eyepiece adapter of the invention, zooming system is passed by the principle of analysis common lens amplification in image
In the case that sensor position is fixed, from during low power to the zoom of high power, by adjust zoom group and fixed group of spacing with
And the spacing of compensation group and fixed group, it is ensured that the increase of the same image distance that becomes smaller of object distance, one for reducing object distance image distance become smaller, separately
An outer principle to become larger realizes anamorphosis function, and optimizes system eyeglass number, and image quality is optimal.
It needs to control the minimum spacing between each group in the movement of each moving parts, makes them will not phase during zoom
Mutually contact needs to guarantee that the minimum range between the zoom group and fixed group is greater than 4mm, and described fixed group between compensation group
Minimum range be greater than 4mm.
The zooming system by zoom multiplying power that intermediary image amplify by the movement of zoom group and compensation group for 0.3 ×~
2.5×。
The object plane side of the field lens is 90~110mm at a distance from imaging sensor.Wherein, the field lens is mounted on centre
As the position of 10~15cm after the position of preceding 10~15cm or intermediary image.The Assurance of Size yield rate of field lens, and protect
Blackspot will not be generated because of the tiny flaw of field lens by demonstrate,proving imaging sensor.Before the mounting, first determine that object passes through microcobjective
The position of formed intermediary image.
It, can be there are many positional relationship between zoom group, fixed group and compensation group in zooming system of the invention, wherein
Optimal location relationship is:
Described fixed group is arranged between zoom group and compensation group, and zoom group is close to field lens, and compensation group is close to image sensing
Device.At this point, the focal length of the field lens is 25~100mm, the focal length of the zoom group is -10~-200mm, the fixed group
Focal length is 20~500mm, and the focal length of the compensation group is 5~30mm.The eyeglass composition of zoom group, fixed group and compensation group can be with
It is not fixed, is wherein preferably a kind of combining form of effect below there are many combining form under the premise of meeting focal range:
The zoom group includes a plano-convex lens and a plano-concave lens, and plano-convex lens are close to field lens；
The fixed group includes a negative meniscus lens and a positive meniscus shaped lens, and negative meniscus lens are close to change
Times group；The concave surface of negative meniscus lens and the convex surface of positive meniscus shaped lens are glued；
The compensation group includes a biconvex lens and a negative meniscus lens, and biconvex lens is close to fixed group；It is double
One convex surface of convex lens and the concave surface of negative meniscus lens are glued.
It can achieve eyeglass number using above-mentioned lens combination to optimize, the optimal purpose of image quality.
In the positional relationship, in zoom group, the focal lengths of plano-convex lens is 5~200mm, the focal length of plano-concave lens is -5~-
30mm；In fixed group, the focal length of negative meniscus lens is -5~-200mm, and the focal length of positive meniscus shaped lens is 5~30mm；Compensation
In group, the focal length of biconvex lens is 2~20mm, and the focal length of negative meniscus lens is -5~-200mm.
By adjusting the spacing of zoom group and fixed group, compensation group and fixed group, different zoom multiplying powers are corresponding as circle is straight
Diameter is between 5~45mm, so that the zoom electronic eyepiece adapter is able to cooperate various sizes of imaging sensor.
During zoom, zoom group, fixed group and compensation group are as a whole, wherein described fixed group and figure
As the position of sensor is fixed, the position of the zoom group and compensation group is adjustable.Pass through the mobile zoom group of left and right adjusting and compensation
Realize continuous zoom function in the position of group.
Compared with prior art, the invention has the following advantages:
The present invention reduces the radial dimension of adapter using field lens, will quickly collapse to the light of external diffusion, and before realization
The pupil of system is connected to reduce the clear aperture of adapter afterwards；Utilize the mobile realization of zoom group in zooming system and compensation group
Biggish zoom ratio；The picture circular diameter range of the adapter is 5~45mm, and being able to cooperate various sizes of imaging sensor makes
With.
Detailed description of the invention
Fig. 1 is a kind of structure diagram of the limited zoomable electronic eyepiece adapter of remote conjugate distance microscope of the present invention；
Fig. 2 is invention electronic eyepiece adapter in the imaging system schematic diagram that enlargement ratio is 0.3 ×~0.75 × when；
Fig. 3 is the MTF curve figure that electronic eyepiece adapter enlargement ratio of the present invention is 0.3 × when；
Fig. 4 is the MTF curve figure that electronic eyepiece adapter enlargement ratio of the present invention is 0.5 × when；
Fig. 5 is the MTF curve figure that electronic eyepiece adapter enlargement ratio of the present invention is 0.63 × when；
Fig. 6 is the MTF curve figure that electronic eyepiece adapter enlargement ratio of the present invention is 0.75 × when；
Fig. 7 is the point range figure that electronic eyepiece adapter enlargement ratio of the present invention is 0.3 × when；
Fig. 8 is the point range figure that electronic eyepiece adapter enlargement ratio of the present invention is 0.5 × when；
Fig. 9 is the point range figure that electronic eyepiece adapter enlargement ratio of the present invention is 0.63 × when；
Figure 10 is the point range figure that electronic eyepiece adapter enlargement ratio of the present invention is 0.75 × when.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawings and examples, it should be pointed out that reality as described below
It applies example to be intended to convenient for the understanding of the present invention, and does not play any restriction effect to it.
As shown in Figure 1, a kind of zoomable electronic eyepiece adapter of limited remote conjugate distance microscope, object pass through object lens institute
At intermediary image 2, field lens 1 is by from the abducent light that object lens are formed to optical axis deviation, and zooming system 3 is for adjusting image
Enlargement ratio, last imaging ray is focused on imaging sensor 4.Zooming system 3 is by successively axially disposed zoom group
31, fixed group 32 and compensation group 33 form, and zoom group 31 by adjusting zoom group 31 and fixed group 32, is mended close to object plane side
It repays group 33 and the spacing of fixed group 32 realizes continuous zoom function.
As shown in Fig. 2, being electronic eyepiece adapter of the present invention in the imaging system that enlargement ratio is 0.3 ×~0.75 × when
System, be followed successively by 0.3 from top to bottom ×, 0.5 ×, 0.63 × and 0.75 ×.Referring to fig. 2 middle the top enlargement ratio be 0.3 ×
Imaging system structure chart, first lens of the adapter are field lenses 1, and light beam is to optical axis deviation after light passes through field lens 1, after
The zooming system 3 in face.Zoom group 31 is plano-convex lens 311 and plano-concave lens 312 in zooming system 3, and fixed group 32 is curved by bearing
The cemented doublet of moon-shaped lens 321 and the contiguity composition of positive meniscus shaped lens 322, compensation group 33 are by biconvex lens 331 and to bear
The cemented doublet of the contiguity composition of meniscus shaped lens 332.
During amplification factor changes from small to big, zoom group 31 and compensation group 33 are moved downward, this meets enlargement ratio
Object distance reduces the basic imaging law that image distance increases during increase.The position of imaging sensor 4 is kept during entire zoom
It is fixed.It is needing to control the minimum spacing between each group in optimization process, contact them will not when zoom, considering machine
The demand of structure, between zooming system zoom group 31 last a piece of (i.e. image planes side) and compensation group 33 first (i.e. object plane side) away from
From 4mm is greater than, 32 last a piece of (i.e. image planes sides) of fixed group and 33 first (i.e. object plane side) spacing of compensation group are greater than 4mm.
Distance of the system from 1 first face of field lens (i.e. object plane side) to imaging sensor 4 is 90~110mm, wherein intermediary image
2 with the control of the spacing of field lens 1 in 10~15mm, the Assurance of Size yield rate of field lens 1, and guarantee imaging sensor 4 not
It can be because the tiny flaw of field lens 1 generates blackspot.As circular diameter is set as 13.5mm under highest multiplying power, large scale can be matched
Imaging sensor.
The continuously linear variation of enlargement ratio may be implemented by mobile zoom group 31 and compensation group 33 in above structure, from
And it realizes single adapter and matches various sizes of imaging sensor.
Due to limited remote conjugate distance microscope with the receiving device of zoomable electronic eyepiece adapter be imaging sensor 4 and
It is not human eye, so the adapter needs aberration correction compared with traditional eyepiece.Here take low power be 0.3 ×, in be again
0.5 ×, high power is 0.63 ×, maximum multiplying power is 0.75 × for analyze aberration.
As illustrated in figures 3-6, generally speaking, the MTF curve of all enlargement ratios is all for MTF curve under different enlargement ratios
It is smoother, close to diffraction limit.Referring to Fig. 3, enlargement ratio is the MTF curve highest of 0.3 × when adapter, and MTF is in 60lp/
0.5 is generally higher than at mm.As shown in figure 4, the MTF that enlargement ratio is 0.5 × when adapter is generally higher than 0.4 at 60lp/mm.
As shown in figure 5, the MTF that enlargement ratio is 0.63 × when adapter is generally higher than 0.3 at 60lp/mm.As shown in fig. 6, amplification
Multiplying power is that the MTF of 0.75 × when adapter is greater than 0.2 at 60lp/mm.
Point range figure under different enlargement ratios is as shown in Fig. 7~10, wherein Fig. 7 is the point range that enlargement ratio is 0.3 × when
Figure, Fig. 8 are the point range figure that enlargement ratio is 0.5 × when, and Fig. 9 is the point range figure that enlargement ratio is 0.63 × when, and Figure 10 is amplification
Multiplying power is the point range figure of 0.75 × when.Generally speaking, point range figure size is smaller, and RMS diameter is controlled substantially within 10 μm.Amplification
More preferable, opposite, edge when multiplying power is 0.5 × and the central vision point range figure of 0.63 × when adapter is than another two multiplying power
The image quality of visual field is more slightly worse than another two multiplying power, but is all satisfied image sensor resolutions requirement.
Specifically, in the present embodiment, the focal length of field lens 1 is 52.5mm, and the focal length of plano-convex lens 311 is 18.0mm, is put down
The focal length of concavees lens 312 is -10.3mm, and the focal length of negative meniscus lens 321 is -16.4mm, the focal length of positive meniscus shaped lens 322
For 13.5mm, the focal length of biconvex lens 331 is 7.2mm, and the focal length of negative meniscus lens 332 is -14.9mm.
This optical system enlargement ratio be 0.3 ×, 0.5 ×, 0.63 ×, 0.75 × in the case where, every basic parameter
As shown in table 1 below.
Table 1
| R1=33.5 | D1=5.0 | N1=1.6 |
| R2=Infinity | D2=25.0,26.3,23.0,19.5 | |
| R3=13.5 | D3=4.0 | N2=1.7 |
| R4=Infinity | D4=1.3 | |
| R5=Infinity | D5=2.5 | N3=1.6 |
| R6=6.6 | D6=5.3,4.0,7.3,10.8 | |
| R7=13.5 | D7=1.8 | N4=1.7 |
| R8=5.8 | D8=2.5 | N5=1.7 |
| R9=11.0 | D9=18.4,11.0,7.1,4.0 | |
| R10=18.6 | D10=3.5 | N6=1.7 |
| R11=-6.0 | D11=2.0 | N7=1.8 |
| R12=-14.8 | D12=21.2,28.6,32.5,35.5 |
Wherein, n1~n7 indicates refractive index of first lens to the 7th lens, R1, R3, R5, R7, R8, R10, R11
Sequentially indicate radius of curvature of first lens to the 7th lens towards object plane side centre of surface；R2,R4,R6,R8,R9,R11,
R12 sequentially indicates that radius of curvature of first lens to the 7th lens towards image planes side centre of surface, unit mm, "-" indicate
Direction is negative, and Infinity is infinity, i.e. expression plane；D1, d3, d5, d7, d8, d10, d11 indicate the first lens to the 7th
The thickness of lens；D2, d4, d6, d9, d12 respectively indicate eyeglass spacing, unit mm；Further, the field lens 1 and plano-convex are saturating
The distance between mirror 311 is 25.0,26.3,23.0,19.5mm；
Further, the distance between the plano-convex lens 311 and plano-concave lens 312 are 1.3mm；
Further, the distance between the plano-concave lens 312 and negative meniscus lens 321 be 5.3,4.0,7.3,
10.8mm；
Further, the distance between the positive meniscus shaped lens 322 and biconvex lens 331 be 18.4,11.0,7.1,
4.0mm；
Further, the distance between the negative meniscus lens 332 and imaging sensor be 21.2,28.6,32.5,
35.5mm。
Technical solution of the present invention and beneficial effect is described in detail in embodiment described above, it should be understood that
Above is only a specific embodiment of the present invention, it is not intended to restrict the invention, it is all to be done in spirit of the invention
Any modification, supplementary, and equivalent replacement, should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of zoomable electronic eyepiece adapter of limited remote conjugate distance microscope, which is characterized in that including field lens and zoom
System, object is by intermediary image formed by microcobjective by zooming system secondary imaging to imaging sensor after field lens receives light
On；
The zooming system includes the zoom group, fixed group and compensation group along optical axis arrangement；The zoom group and fixed group, compensation
The spacing of group and fixed group is adjustable, for realizing continuous zoom function.
2. the zoomable electronic eyepiece adapter of limited remote conjugate distance microscope according to claim 1, which is characterized in that
Minimum range between the zoom group and fixed group is greater than 4mm, and the fixed group of minimum range between compensation group is greater than
4mm。
3. the zoomable electronic eyepiece adapter of limited remote conjugate distance microscope according to claim 1, which is characterized in that
The zoom multiplying power that the zooming system amplifies intermediary image be 0.3 ×~2.5 ×.
4. the zoomable electronic eyepiece adapter of limited remote conjugate distance microscope according to claim 1, which is characterized in that
The field lens is mounted on the position of 10~15cm after the position of 10~15cm before intermediary image or intermediary image.
5. the zoomable electronic eyepiece adapter of limited remote conjugate distance microscope according to claim 1, which is characterized in that
Described fixed group is arranged between zoom group and compensation group, and zoom group is close to field lens, and compensation group is close to imaging sensor；
The focal length of the field lens is 25~100mm, and the focal length of the zoom group is -10~-200mm, the focal length of the fixed group
For 20~500mm, the focal length of the compensation group is 5~30mm.
6. the zoomable electronic eyepiece adapter of limited remote conjugate distance microscope according to claim 5, which is characterized in that
The zoom group includes a plano-convex lens and a plano-concave lens, and plano-convex lens are close to field lens；
The fixed group includes a negative meniscus lens and a positive meniscus shaped lens, and negative meniscus lens are close to zoom
Group；The concave surface of negative meniscus lens and the convex surface of positive meniscus shaped lens are glued；
The compensation group includes a biconvex lens and a negative meniscus lens, and biconvex lens is close to fixed group；Lenticular
One convex surface of mirror and the concave surface of negative meniscus lens are glued.
7. the zoomable electronic eyepiece adapter of limited remote conjugate distance microscope according to claim 6, which is characterized in that
In zoom group, the focal length of plano-convex lens is 5~200mm, and the focal length of plano-concave lens is -5~-30mm；In fixed group, negative meniscus
The focal length of lens is -5~-200mm, and the focal length of positive meniscus shaped lens is 5~30mm；In compensation group, the focal length of biconvex lens is 2
~20mm, the focal length of negative meniscus lens are -5~-200mm.
8. the zoomable electronic eyepiece adapter of limited remote conjugate distance microscope according to claim 1, which is characterized in that
The position of the fixed group and imaging sensor is fixed, and the position of the zoom group and compensation group is adjustable.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113219651A (en) * | 2021-05-14 | 2021-08-06 | 湖北大学 | Straight-barrel type combination design method of miniaturized optical microscope |
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| CN113219651A (en) * | 2021-05-14 | 2021-08-06 | 湖北大学 | Straight-barrel type combination design method of miniaturized optical microscope |
| CN113219651B (en) * | 2021-05-14 | 2022-05-03 | 湖北大学 | Straight cylinder type combination design method of miniaturized optical microscope |
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