CN207627298U - A kind of Portable eye bottom detection device based on mobile lens - Google Patents
A kind of Portable eye bottom detection device based on mobile lens Download PDFInfo
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- CN207627298U CN207627298U CN201720669026.4U CN201720669026U CN207627298U CN 207627298 U CN207627298 U CN 207627298U CN 201720669026 U CN201720669026 U CN 201720669026U CN 207627298 U CN207627298 U CN 207627298U
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Abstract
The Portable eye bottom detection device based on mobile lens that the utility model discloses a kind of, mesh object lens, collimating mirror are connect including what is be separately arranged and for placing the shell for connecing mesh object lens, collimating mirror, the shell both ends are equipped with opening, the mesh object lens that connect include the first cemented doublet and the second cemented doublet, first cemented doublet is oppositely arranged with the second cemented doublet, the collimating mirror includes third cemented doublet and the 4th cemented doublet, and the third cemented doublet is oppositely arranged with the 4th cemented doublet.The utility model more small volume and less weight, easy to carry, easy to operate, fast imaging simultaneously can obtain high-definition picture, and user can carry out human blood glucose to itself eye conditions at home, and can find that the patient's condition is seen a doctor in time at any time.
Description
Technical field
The Portable eye bottom detection device based on mobile lens that the utility model is related to a kind of, belongs to medical instruments field.
Background technology
Retina as whole body uniquely can live body, it is noninvasive under the conditions of observation blood vessel and its distribution tissue, become
The important window of current diagnosis eye disease and relevant whole body system disease.Most common ophthalmology disease have lid inflammation,
Conjunctivitis, cataract etc., except the ophthalmology class lesion of appearance characterization, the capillary lesion of retina can early diagnose
The diseases such as hypertension, diabetes, thrombus, thus fundus imaging inspection becomes clinical medicine and the hot topic of modern scientific research is right
As.
Nineteen twenty-five Germany Zeiss, company devised First fundus camera in the world, which uses the Zeiss of standard
Fundus camera configuration form, lighting system and imaging system are two independent systems, are connected by semi-permeable and semi-reflecting mirror
It connecing, the light sent out by the light source of lighting system enters after lighting system in human eye, and imaging system is entered after fundus reflex,
And it is finally imaged on camera negative.The desk-top fundus camera equipment manufacturing cost that early stage develops is expensive and not readily portable.In order into
One step popularizes funduscopy, and the Kenneth Tran et al. of University of Virginia in 2012, which are developed, a utilizes general digital
The inexpensive Portable fundus camera of camera design, the emergent pupil of the imaging optical path are matched with the entrance pupil of digital camera, are utilized
The automatic focusing function of digital camera can compensate the diopter of human eye not just, and the flash lamp of camera access lighting system is made
For the stroboscopic light sources taken pictures, and polarizer is added in systems and eliminates the veiling glare that mirror-reflection generates.
However existing fundus camera is complicated, not easy to operate, therefore, exploitation is a kind of easily to can be used for what family used
Fundus camera, it is clear that be necessary.
Invention content
The goal of the invention of the utility model is to provide a kind of Portable eye bottom detection device based on mobile lens.
To achieve the above object of the invention, the technical solution adopted in the utility model is：It is a kind of based on the portable of mobile lens
Formula eyeground detection device, including what is be separately arranged connect mesh object lens, collimating mirror and for placing the shell for connecing mesh object lens, collimating mirror
Body, the shell both ends are equipped with opening,
The mesh object lens that connect include the first cemented doublet and the second cemented doublet, first cemented doublet and the
Two cemented doublets are oppositely arranged,
The collimating mirror includes third cemented doublet and the 4th cemented doublet, the third cemented doublet and the 4th
Cemented doublet is oppositely arranged,
The mesh object lens that connect meet image space telecentricity,
Distance is not more than 140mm in the distance for connecing mesh object lens outermost surfaces to the axis of mobile phone Lens Entrance Pupil, connects mesh
The distance range of object lens and collimating mirror is 63 ~ 65mm.
Preferably, first cemented doublet includes the first positive lens and the first negative lens, and second pair of gluing is saturating
Mirror includes the second positive lens and the second negative lens, and first positive lens and the second positive lens are oppositely arranged.
Preferably, the third cemented doublet includes third positive lens and third negative lens, and the 4th pair of gluing is saturating
Mirror includes the 4th positive lens and the 4th negative lens, and the third positive lens and the 4th positive lens are oppositely arranged.
Preferably, the focal length f1 for connecing mesh object lens: 35mm<f1<50mm.
Preferably, the focal length f2 of collimating mirror：35mm<f2<50mm.
In further technical solution, the refractive index n1 of first negative lens and the second negative lens glass material is satisfied by:
1.6<n1<1.8, Abbe number v1 is satisfied by 15<v1<40.
In further technical solution, the refractive index n2 of the third negative lens and the 4th negative lens glass material is satisfied by:
1.6<n1<1.8, Abbe number v2 is satisfied by 15<v2<40.
Preferably, the end of the shell is additionally provided with the fixing device for fixing mobile phone.
Preferably, it is 64.132mm at a distance from collimating mirror to connect mesh object lens.
Preferably, the pixel of the mobile lens is more than 5,000,000.
Since above-mentioned technical proposal is used, the utility model has following advantages compared with prior art：
1. the utility model is the home medical Portable fundus camera based on mobile lens, can be used for shooting eyeground view
Film image shoots the clear retinal images of high-resolution using the automatic focusing function of mobile lens.
2. the utility model more small volume and less weight, easy to carry, easy to operate, fast imaging simultaneously can obtain high-resolution
Image, user can carry out human blood glucose to itself eye conditions at home, and can find that the patient's condition is seen a doctor in time at any time.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the concrete structure schematic diagram in the utility model embodiment one.
Fig. 3 is the schematic diagram of the size of disc of confusion under different visual fields.
Fig. 4 is MTF curve schematic diagram under different visual fields.
Wherein：1, mesh object lens are connect；2, collimating mirror.
Specific implementation mode
The utility model is further described with reference to the accompanying drawings and embodiments：
Embodiment one：
Shown in Fig. 1 ~ Fig. 2, a kind of Portable eye bottom detection device based on mobile lens, including be separately arranged
It connects mesh object lens 1, collimating mirror 2 and for placing the shell 3 for connecing mesh object lens, collimating mirror, the shell both ends is equipped with opening,
The mesh object lens that connect include the first cemented doublet and the second cemented doublet, first cemented doublet and the
Two cemented doublets are oppositely arranged,
The collimating mirror includes third cemented doublet and the 4th cemented doublet, the third cemented doublet and the 4th
Cemented doublet is oppositely arranged,
The mesh object lens that connect meet image space telecentricity,
Distance is not more than 140mm in the distance for connecing mesh object lens outermost surfaces to the axis of mobile phone Lens Entrance Pupil, connects mesh
The distance range of object lens and collimating mirror is 64.132mm.
Above, the leftmost side that mesh object lens outermost refers to program object lens in Fig. 1 is connect, mesh object lens 1, collimating mirror 2 are connect in Fig. 1
Vertical line refer to an image planes, the structure of shell is not drawn into wherein Fig. 2.
In the present embodiment, first cemented doublet includes the first positive lens and the first negative lens, the second pair of glue
It includes the second positive lens and the second negative lens to close lens, and first positive lens and the second positive lens are oppositely arranged.
In the present embodiment, the third cemented doublet includes third positive lens and third negative lens, the 4th pair of glue
It includes the 4th positive lens and the 4th negative lens to close lens, and the third positive lens and the 4th positive lens are oppositely arranged.
In the present embodiment, the focal length f1 for connecing mesh object lens: 35mm<f1<It is small-sized to be unfavorable for system beyond the upper limit by 50mm
Change, is unfavorable for the control of the elimination and system image space telecentricity of aberration beyond lower limit.
In the present embodiment, the focal length f2 of collimating mirror：35mm<f2<50mm is unfavorable for system compact beyond the upper limit, exceeds
Lower limit is unfavorable for the elimination of aberration.
In the present embodiment, the refractive index n1 of first negative lens and the second negative lens glass material is satisfied by: 1.6<n1
<1.8, Abbe number v1 is satisfied by 15<v1<40, it is unfavorable for the elimination of aberration outside the range.
In the present embodiment, the refractive index n2 of the third negative lens and the 4th negative lens glass material is satisfied by: 1.6<n1
<1.8, Abbe number v2 is satisfied by 15<v2<40, it is unfavorable for the elimination of aberration outside the range.
In the present embodiment, the pixel of the mobile lens is more than 5,000,000.
The utility model meets the following conditions：
System overall length TTL refers to from connecing distance on mesh object lens first surface to the axis of mobile phone Lens Entrance Pupil；Operating distance WL refers to
Human eye distance of exit pupil connects distance on the axis of mesh object lens first surface.
It is shown in Figure 2, selecting system overall length TTL=137.789mm in the present embodiment, operating distance WL=30mm, system
Overall length TTL=137.789mm meets the condition for being less than 140mm miniaturizations；Spectral region is the visible spectrum that mobile lens are taken pictures
Range；Field angle reaches 40 degree, can cover entire retina；Operating distance WL=30mm.Mobile lens use 5,000,000 pixels
Mobile phone camera lens.
Data in following table have:It connects between the radius of curvature R of mesh object lens and collimating mirror, the center thickness of lens and lens
Distance d, refractive index nd, Abbe number vd.
It is shown in Figure 3, it is the schematic diagram of the size of disc of confusion under different visual fields, is less than in maximum field of view's disc of confusion radius
7um。
It is shown in Figure 4, it is MTF curve schematic diagram under different visual fields, it can be seen that 100 positions lp/mm of spatial frequency exist
Central vision MTF>0.5, in maximum field of view MTF>0.3, with high image quality, small volume and less weight, easy to carry, operation letter
Single, fast imaging, can obtain high-definition picture.
The finally obtained data of the present embodiment are referring to following table：
Claims (9)
1. a kind of Portable eye bottom detection device based on mobile lens, it is characterised in that：Mesh object is connect including what is be separately arranged
Mirror, collimating mirror and for placing the shell for connecing mesh object lens, collimating mirror, the shell both ends are equipped with opening,
The mesh object lens that connect include the first cemented doublet and the second cemented doublet, first cemented doublet and second pair
Balsaming lens is oppositely arranged,
The collimating mirror includes third cemented doublet and the 4th cemented doublet, the third cemented doublet and the 4th pair of glue
Lens are closed to be oppositely arranged,
The mesh object lens that connect meet image space telecentricity,
Distance is not more than 140mm in the distance for connecing mesh object lens outermost surfaces to the axis of mobile phone Lens Entrance Pupil, connects mesh object lens
Distance range with collimating mirror is 63 ~ 65mm.
2. the Portable eye bottom detection device according to claim 1 based on mobile lens, it is characterised in that：Described first
Cemented doublet includes the first positive lens and the first negative lens, and second cemented doublet includes that the second positive lens and second are negative
Lens, first positive lens and the second positive lens are oppositely arranged.
3. the Portable eye bottom detection device according to claim 1 based on mobile lens, it is characterised in that：The third
Cemented doublet includes third positive lens and third negative lens, and the 4th cemented doublet includes that the 4th positive lens and the 4th are negative
Lens, the third positive lens and the 4th positive lens are oppositely arranged.
4. the Portable eye bottom detection device according to claim 1 based on mobile lens, it is characterised in that：It is described to connect mesh
The focal length f1 of object lens: 35mm<f1<50mm.
5. the Portable eye bottom detection device according to claim 1 based on mobile lens, it is characterised in that：Collimating mirror
Focal length f2：35mm<f2<50mm.
6. the Portable eye bottom detection device according to claim 2 based on mobile lens, it is characterised in that：Described first
The refractive index n1 of negative lens and the second negative lens glass material is satisfied by: 1.6<n1<1.8, Abbe number v1 is satisfied by 15<v1<
40。
7. the Portable eye bottom detection device according to claim 3 based on mobile lens, it is characterised in that：The third
The refractive index n2 of negative lens and the 4th negative lens glass material is satisfied by: 1.6<n1<1.8, Abbe number v2 is satisfied by 15<v2<
40。
8. the Portable eye bottom detection device according to claim 1 based on mobile lens, it is characterised in that：The shell
End be additionally provided with the fixing device for fixing mobile phone.
9. the Portable eye bottom detection device according to claim 1 based on mobile lens, it is characterised in that：Connect mesh object lens
With at a distance from collimating mirror be 64.132mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720669026.4U CN207627298U (en) | 2017-06-09 | 2017-06-09 | A kind of Portable eye bottom detection device based on mobile lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720669026.4U CN207627298U (en) | 2017-06-09 | 2017-06-09 | A kind of Portable eye bottom detection device based on mobile lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207627298U true CN207627298U (en) | 2018-07-20 |
Family
ID=62860579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720669026.4U Active CN207627298U (en) | 2017-06-09 | 2017-06-09 | A kind of Portable eye bottom detection device based on mobile lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207627298U (en) |
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2017
- 2017-06-09 CN CN201720669026.4U patent/CN207627298U/en active Active
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