CN110141187A - One kind is portable to exempt from mydriasis fundus camera - Google Patents
One kind is portable to exempt from mydriasis fundus camera Download PDFInfo
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- CN110141187A CN110141187A CN201910307353.9A CN201910307353A CN110141187A CN 110141187 A CN110141187 A CN 110141187A CN 201910307353 A CN201910307353 A CN 201910307353A CN 110141187 A CN110141187 A CN 110141187A
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- China
- Prior art keywords
- optical path
- positioning
- focusing
- fundus camera
- working distance
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0008—Apparatus for testing the eyes; Instruments for examining the eyes provided with illuminating means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0016—Operational features thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
- A61B3/1208—Multiple lens hand-held instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
- A61B3/15—Arrangements specially adapted for eye photography with means for aligning, spacing or blocking spurious reflection ; with means for relaxing
- A61B3/152—Arrangements specially adapted for eye photography with means for aligning, spacing or blocking spurious reflection ; with means for relaxing for aligning
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/14—Arrangements specially adapted for eye photography
- A61B3/15—Arrangements specially adapted for eye photography with means for aligning, spacing or blocking spurious reflection ; with means for relaxing
- A61B3/156—Arrangements specially adapted for eye photography with means for aligning, spacing or blocking spurious reflection ; with means for relaxing for blocking
- A61B3/158—Arrangements specially adapted for eye photography with means for aligning, spacing or blocking spurious reflection ; with means for relaxing for blocking of corneal reflection
Abstract
The invention discloses it is a kind of it is portable exempt from mydriasis fundus camera, be related to medical ophthalmology optical instrument field.The fundus camera includes: optical system and control unit；Wherein, optical system includes positioning optical path, focusing optical path, illumination imaging optical path；It positions optical path, focusing optical path, illumination imaging optical path and shares one group of varifocus objective and an imaging sensor；Positioning optical path, focusing optical path include at least one double wedge；Control unit is used to handle the eye fundus image taken for controlling the positioning optical path, the focusing optical path and the illumination imaging optical path；The fundus camera is not only small in size to be convenient for carrying, additionally it is possible to realize quickly positioning working distance and precisely focusing, while guarantee into tablet quality and rate in blocks；User is safe and convenient to use.
Description
Technical field
The present invention relates to medical ophthalmology optical instrument fields, and in particular to one kind is portable to exempt from mydriasis fundus camera.
Background technique
Fundus camera is as a kind of medical eye examination equipment, for observing and obtain human eye eye fundus image, such as observes
Whether retina, optic disk, the vascular distribution on eyeground etc. are abnormal.The blood vessel on eyeground is that human body can uniquely be observed directly by body surface
Capillary, using fundus camera, doctor can be used to make the morning of a variety of diseases such as fundus oculi disease, nephrosis, hypertension, diabetes
Phase diagnosis.
The generally existing optical system structure of desk-top fundus camera currently on the market is complicated, volume is very much not portable, needs to match
Special software and external computer are set, while also external power supply being needed to power, the disadvantages of cost is higher；And to primary care ring
The bad adaptability in border, it is difficult to which a large amount of popularization and applications, special patient (bed patient of such as hospital) use very inconvenient.
And with the development of automatic processing, especially artificial intelligence technology, the automatic identification of eye fundus image is becoming
It may, it means that be also required to be quickly obtained high quality eye fundus image in the case where more lacking the scene in formal equipment and place.State
The inside and outside portable and hand-held fundus camera occurred in the market lacks working distance positioning although optical system structure is simple
With exact focus optical path, operator is easy shake when in use, is difficult to find pupil accurately, not can guarantee working distance and exact focus,
Lead to problems such as image quality difference and rate in blocks low；And infrared light of existing Portable fundus camera during observation is usual
It is entirely to project eyeground, certain damage is brought to human eye.Therefore, portable fundus imaging camera is developed, and is allowed to gather around
The closer performance with traditional large scale equipment is current urgent problem to be solved.
Summary of the invention
The present invention is intended to provide one kind is portable to exempt from mydriasis fundus camera, it can overcome the deficiencies of existing technologies, pass through
Optical system shares one group of varifocus objective and an imaging sensor, reduces volume；Quickly positioning work is realized using double wedges
Away from and precisely focusing, while guarantee at tablet quality and rate in blocks.Goal of the invention of the invention is able to by the following technical programs
It realizes:
The embodiment of the present application provide it is a kind of it is portable exempt from mydriasis fundus camera, the fundus camera include optical system and
Control unit；Wherein, the optical system includes positioning optical path, focusing optical path, illumination imaging optical path；The positioning optical path, institute
State focusing optical path, the illumination imaging optical path shares one group of varifocus objective and an imaging sensor；It is the positioning optical path, described
Focusing optical path includes at least one double wedge；
Described control unit is for controlling the positioning optical path, the focusing optical path and the illumination imaging optical path, simultaneously
For handling the eye fundus image taken.
Specifically, the varifocus objective includes connecing mesh object lens and varifocal mirror.
Preferably, the focusing optical path and the illumination imaging optical path share partial optical component.
Specifically, the shared partial optical component includes annular reflective mirror and condenser.
Preferably, the positioning optical path further includes working distance lens set；
When positioning optical path work, the working distance lens set is moved into optical path；When the positioning optical path completes work
Make away from positioning, the working distance lens set is removed into optical path.
Specifically, working distance is completed when the positioning optical path to position, specifically include: when the positioning optical path adjusting working distance
When for preset value, pupil of human is imaged as the first pre-set image in described image sensor.
More specifically, the working distance lens set includes: pellicle mirror, double wedges, two condensers, white LED lamps.
Preferably, the focusing optical path includes a light source and focusing lens set；The light that the light source issues is through the tune
Focus lens group incidence human eye eye ground, the light of fundus reflex can be imaged in described image sensor；
When the focusing optical path is completed to focus, the second pre-set image is imaged as in described image sensor.
Specifically, light source included by the focusing optical path is non-visible light sources.
Preferably, described control unit includes embeded processor and control circuit and display device；The embedded place
It manages device and control circuit is specifically used for controlling the positioning optical path, the focusing optical path and the illumination imaging optical path, use simultaneously
It is handled in the eye fundus image taken；The display device is for showing the eye fundus image.
Advantageous effects of the invention: the invention discloses it is a kind of it is portable exempt from mydriasis fundus camera, not only volume
It is small to be convenient for carrying, additionally it is possible to realize quickly positioning working distance and precisely focusing, while guarantee into tablet quality and rate in blocks；This
Outside, user is safe and convenient to use.
Detailed description of the invention
Illustrate the embodiment of the present invention or technical solution in the prior art in order to clearer, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the portable structural schematic diagram for exempting from mydriasis fundus camera of one kind shown in embodiment two；
Fig. 2 is the structural schematic diagram of the portable positioning optical path A1 for exempting from mydriasis fundus camera of one kind shown in embodiment two；
Fig. 3 is the structural schematic diagram of the portable focusing optical path A2 for exempting from mydriasis fundus camera of one kind shown in embodiment two；
Fig. 4 is the structural representation of the portable illumination imaging optical path A3 for exempting from mydriasis fundus camera of one kind shown in embodiment two
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
Present embodiments provide it is a kind of it is portable exempt from mydriasis fundus camera, the fundus camera includes optical system and control
Unit；Wherein, the optical system includes positioning optical path, focusing optical path, illumination imaging optical path；The positioning optical path, the tune
Burnt optical path, the illumination imaging optical path share one group of varifocus objective and an imaging sensor；The positioning optical path, the focusing
Optical path includes at least one double wedge；
Described control unit is for controlling the positioning optical path, the focusing optical path and the illumination imaging optical path, simultaneously
The eye fundus image taken is handled.
Specifically, the varifocus objective includes connecing mesh object lens and varifocal mirror.
Preferably, the focusing optical path and the illumination imaging optical path share partial optical component.
Specifically, the shared partial optical component includes annular reflective mirror and condenser.
Preferably, the positioning optical path further includes working distance lens set；
When positioning optical path work, the working distance lens set is moved into optical path；When the positioning optical path completes work
Make away from positioning, the working distance lens set is removed into optical path.
Specifically, working distance is completed when the positioning optical path to position, specifically include: when the positioning optical path adjusting working distance
When for preset value, pupil of human is imaged as the first pre-set image in described image sensor.
More specifically, the first pre-set image is that two halves are aligned image to pupil of human up and down.
More specifically, the working distance lens set includes: pellicle mirror, double wedges, two condensers, white LED lamps.
Preferably, the focusing optical path includes a light source and focusing lens set；The light that the light source issues is through the tune
Focus lens group incidence human eye eye ground, the light of fundus reflex can be imaged in described image sensor；
When the focusing optical path is completed to focus, the second pre-set image is imaged as in described image sensor.
Specifically, the second pre-set image is a complete rectangle speck image.
Specifically, light source included by the focusing optical path is non-visible light sources.
Preferably, described control unit includes embeded processor and control circuit and display device；The embedded place
Reason device and control circuit are used to control the positioning optical path, the focusing optical path and the illumination imaging optical path, while to shooting
To eye fundus image handled；The display device is for showing the eye fundus image.
Specifically, the embeded processor and control circuit are specifically used for the control to optical alignment in the positioning optical path
System；Control to the back-and-forth motion of varifocal mirror in the focusing optical path；The eye fundus image is shot to the illumination imaging optical path
Control and processing to the eye fundus image.
More specifically, control unit is used to specifically include to working distance the control of optical alignment in the positioning optical path
The control of lens set moved in and out.
Embodiment two
As shown in Figure 1, for the portable structural schematic diagram for exempting from mydriasis fundus camera of one kind disclosed in the present embodiment；Including light
System A and control unit 9, wherein optical system A includes including positioning optical path A1, focusing optical path A2 and illumination imaging optical path
A3；Positioning includes working distance lens set in optical path A1, includes focusing lens set in the optical path A2 that focuses；
Specifically, optical system A include: white light LEDs annular lamp plate 1, the first condenser 2, aperture diaphragm 3, pellicle mirror 4,
Second condenser lens 5,6, first pairs of wedges 7 of third condenser, infrared LED lamp 8, imaging sensor 10, switching mirror 11, varifocal mirror
12, annular reflective mirror 13, pellicle mirror 14, connect mesh object lens 15, white LED lamp 16,17, second pairs of wedges 18 of the 4th condenser, the
Five condensers 19.
Further, optical system A uses varifocus objective structure, wherein the varifocus objective includes connecing mesh object lens and zoom
Mirror, varifocal mirror cooperate with focusing lens set, can meet the job requirement of illumination imaging optical path A3 and the optical path A2 that focuses simultaneously,
To realize the blur-free imaging of different diopter human eye eye grounds；And first to guarantee imaging system before shooting fundus photograph
System A and human eye realize pupil linking, i.e., the pupil of the entrance pupil and human eye that meet optical system is coaxial, meet optics work again
Away from for design value.
Wherein, control unit 9 is made of high performance embedded SOC processor, single-chip microcontroller, touch screen, battery etc., is realized
The functions such as shooting, control and the storage of eye fundus image；Wherein, embedded SOC processor is internally integrated image processing unit, can be real
The real-time processing of existing high-definition picture；And Peripheral Interface is abundant, and it is small in size low in energy consumption, greatly reduce the body of entire product
Product；Battery power supply can be used simultaneously, promote and realize the portability of product；
Further, control unit includes embeded processor and control circuit and display device；Embeded processor and
Control circuit is specifically used for controlling the positioning optical path, the focusing optical path and the illumination imaging optical path, while for bat
The eye fundus image taken the photograph is handled；The display device is for showing the eye fundus image.
Further, as shown in Fig. 2, for the portable positioning optical path A1 for exempting from mydriasis fundus camera of one kind disclosed in embodiment
Structural schematic diagram；Wherein, positioning optical path A1 includes connecing 19, second pairs of mesh object lens 15, pellicle mirror 14, the 5th condenser wedges
18, the 4th condenser 17, white LED lamp 16, varifocal mirror 12, switching mirror 11, imaging sensor 10.Wherein, pellicle mirror the 14, the 5th
19, second pairs of wedges 18 of condenser, the 4th condenser 17, white LED lamp 16 form working distance lens set, the working distance eyeglass
Group designs to can be inserted into shift-out structure, and in working distance positioning, working distance lens set needs to cut optical path；After incision, white light
The light that LED light 16 issues passes through 17, second pairs of wedges 18 of the 4th condenser, the 5th condenser 19, pellicle mirror 14, connects mesh object lens 15
It is incident on pupil, the light of pupillary reflex is connect mesh object lens 15, pellicle mirror 14, varifocal mirror 12, switching mirror 11 to imaging sensor 10
Upper imaging；Since using double wedge designs, when working distance is preset value, pupil of human two halves alignment up and down positions light at this time
Road A1 completes working distance positioning, and the working distance lens set removes optical path.
In the present embodiment, positioning optical path A1 is for positioning the distance between human eye and camera, when positioning optical path work,
Working distance lens set is moved into optical path by control unit 9；When positioning optical path completes working distance positioning, control unit 9 is by working distance mirror
Piece group removes optical path；And when pupil is located at the center Screen and pupil consistency from top to bottom of the display screen of control unit 9, optical system
System and human eye realize pupil linking, and working distance is preset value at this time.
Further, as shown in figure 3, for the portable focusing optical path A2 for exempting from mydriasis fundus camera of one kind disclosed in embodiment
Structural schematic diagram；Wherein, focusing optical path A2 include connect mesh object lens 15, annular reflective mirror 13, second condenser lens 5, pellicle mirror 4,
6, first pairs of wedges 7 of third condenser, infrared LED lamp 8, varifocal mirror 12, switching mirror 11, imaging sensor 10；Wherein, annular is anti-
Light microscopic 13, second condenser lens 5, pellicle mirror 4,6, first pairs of wedges 7 of third condenser, the composition focusing lens set of infrared LED lamp 8,
The focusing lens set is that can be inserted into design with shift-out structure, and when being focused, focusing lens set needs to cut optical path；
After incision, infrared LED lamp 8 issues infrared light, through first pair of wedge 7, third condenser 6, pellicle mirror 4, second condenser lens 5, ring
Shape reflective mirror 13 connects the incident human eye eye ground of mesh object lens 15, and the light of fundus reflex is connect mesh object lens 15, annular reflective mirror
13, varifocal mirror 12, switching mirror 11 to imaging sensor 10 on be imaged；Due in exact focus, passing through using double wedge designs
The display screen of control unit 9, which is observed that on eye fundus image, a complete rectangle speck, can be observed two when defocus
The separated rectangle speck of item, control unit 9 are moved forward or rearward the quick exact focus of realization by adjusting varifocal mirror 12.
It should be noted that imaging sensor 10, pellicle mirror 4, annular reflective mirror 13, human eye eye ground are that conjugation is flat
Face；
In the present embodiment, focusing optical path A2 uses Zoom structure, is adapted to different diopter human eyes, and focus optical path A2
Using near-infrared LED light source, pupil of human contraction in focussing process is prevented, focusing is split using double wedges as method guarantee is accurate right
Coke, and light channel structure is simple.
Further, as shown in figure 4, for the portable illumination imaging for exempting from mydriasis fundus camera of one kind disclosed in embodiment
The structural schematic diagram of road A3；Wherein, illumination imaging optical path A3 include: connect mesh object lens 15, annular reflective mirror 13, second condenser lens 5,
Aperture diaphragm 3, the first condenser 2, white light LEDs annular lamp plate 1, varifocal mirror 12, switching mirror 11, imaging sensor 10；White light LEDs
The light that annular lamp plate 1 issues successively through the first condenser 2, aperture diaphragm 3, second condenser lens 5, annular reflective mirror 13, connect mesh object
Mirror 15, the cyclization image at iris, from pupil edge incidence human eye；It is reflective that the light of human eye reflection is connect mesh object lens 15, annular again
It being imaged on mirror 13, varifocal mirror 12, mirror 11 to imaging sensor 10 of transferring, control unit 9 completes image procossing, display and storage,
Corneal reflection veiling glare can effectively eliminate using white light LEDs annular lamp plate 1；
It should be noted that varifocal mirror uses aspheric design, control veiling glare can be very good.
In the present embodiment, illumination imaging optical path A3 uses White LED visible light source；It is used when shooting eye fundus image
LED glisten style of shooting, it can be achieved that moment capture eye ground clear image.
It should also be noted that, portable disclosed in the present embodiment exempt from that mydriasis fundus camera is not only small in size conveniently to be taken
Band, additionally it is possible to which rapid alignment positioning and accurate focusing in the case where those who are investigated are not necessarily to mydriasis, picture quality is high, is suitble to base
Eye examination and other view light fields institute it is universal, while can access artificial intelligence system to eye fundus image progress intellectual analysis.
The present embodiment also discloses a kind of portable working method for exempting from mydriasis fundus camera, and specific work process includes:
Step 101: completing working distance positioning；
Specifically, in conjunction with Fig. 1, working distance lens set is moved into optical path, shows pupil of human figure on imaging sensor at this time
Picture；It is moved forward and backward fundus camera, adjusts working distance, when on the pupil circle and pupil of human that pupil is located at the center Screen of display screen
When lower two halves are aligned, working distance positioning is completed；Working distance lens set is removed into optical path.
Step 102: completing focusing；
Specifically, focusing lens set is moved into optical path, is observed that two rectangle specks in the center Screen of display screen；
It manually adjusts or uses auto-focusing that two specks among display screen is made to be aligned to form a complete rectangle speck, realize
Precisely focusing.
Step 103: taking pictures on eyeground.
Specifically, the visible light source in starting illumination imaging circuit is stronger by eyeground use such as white light LEDs annular lamp plate 1
Light moment illuminate, press take pictures complete a width eye fundus image shooting.
Exempt from mydriasis fundus camera based on portable disclosed in the present embodiment, even if in portable application scenarios, eyeground
Camera also can be by being positioned first, being focused again, being finally completed the step of fundus imaging, and guarantee is at tablet quality and in flakes
Rate；And due to having used near-infrared light source and double wedges to split as focusing light path design, entirely irradiated so that avoiding infrared light
To human eye, the safety of equipment is improved；In addition, only with imaging sensor realize under near infrared light and white light at
Picture reduces the complexity of electronics and structure, realizes the portability of product.
More than, it is merely preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto, it is any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. one kind is portable to exempt from mydriasis fundus camera, which is characterized in that the fundus camera includes optical system and control unit；
Wherein, the optical system includes positioning optical path, focusing optical path, illumination imaging optical path；The positioning optical path, the focusing light
Road, the illumination imaging optical path share one group of varifocus objective and an imaging sensor；The positioning optical path, the focusing optical path
Comprising at least one double wedge；
Described control unit is used for simultaneously for controlling the positioning optical path, the focusing optical path and the illumination imaging optical path
The eye fundus image taken is handled.
2. fundus camera according to claim 1, which is characterized in that the varifocus objective includes connecing mesh object lens and zoom
Mirror.
3. fundus camera according to claim 1, which is characterized in that the focusing optical path and the illumination imaging optical path are total
Enjoy partial optical component.
4. fundus camera according to claim 3, which is characterized in that the shared partial optical component includes that annular is reflective
Mirror and condenser.
5. fundus camera according to claim 1, which is characterized in that the positioning optical path further includes working distance lens set；
When positioning optical path work, the working distance lens set is moved into optical path；When the positioning optical path completes working distance
The working distance lens set is removed optical path by positioning.
6. fundus camera according to claim 5, which is characterized in that when the positioning optical path completes working distance positioning, tool
Body includes: when the positioning optical path adjusting working distance is preset value, and pupil of human is imaged as in described image sensor
First pre-set image.
7. fundus camera according to claim 5, which is characterized in that the working distance lens set includes: pellicle mirror, double light
Wedge, two condensers, white LED lamps.
8. fundus camera according to claim 1, which is characterized in that the focusing optical path includes a light source and focusing lens
Piece group；For the light that the light source issues through the focusing lens set incidence human eye eye ground, the light of fundus reflex can be described
It is imaged on imaging sensor；
When the focusing optical path is completed to focus, the second pre-set image is imaged as in described image sensor.
9. fundus camera according to claim 8, which is characterized in that light source included by the focusing optical path is non-visible
Radiant.
10. fundus camera according to claim 1, which is characterized in that described control unit include embeded processor and
Control circuit and display device；The embeded processor and control circuit are specifically used for controlling the positioning optical path, the tune
Burnt optical path and the illumination imaging optical path, while for handling the eye fundus image taken；The display device is used for
Show the eye fundus image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910307353.9A CN110141187A (en) | 2019-04-17 | 2019-04-17 | One kind is portable to exempt from mydriasis fundus camera |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910307353.9A CN110141187A (en) | 2019-04-17 | 2019-04-17 | One kind is portable to exempt from mydriasis fundus camera |
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| CN110141187A true CN110141187A (en) | 2019-08-20 |
Family
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|---|---|---|---|
| CN201910307353.9A Pending CN110141187A (en) | 2019-04-17 | 2019-04-17 | One kind is portable to exempt from mydriasis fundus camera |
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Cited By (1)
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| CN112869703A (en) * | 2019-12-01 | 2021-06-01 | 深圳硅基智能科技有限公司 | Optical system of fundus camera and fundus camera |
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