CN107468208B - Portable special imaging system for eye diagnosis - Google Patents
Portable special imaging system for eye diagnosis Download PDFInfo
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- CN107468208B CN107468208B CN201710809161.9A CN201710809161A CN107468208B CN 107468208 B CN107468208 B CN 107468208B CN 201710809161 A CN201710809161 A CN 201710809161A CN 107468208 B CN107468208 B CN 107468208B
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Classifications
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- 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
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- 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
- A61B3/125—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 with contact lenses
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
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- Molecular Biology (AREA)
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- Veterinary Medicine (AREA)
- Eye Examination Apparatus (AREA)
Abstract
A portable imaging system special for eye diagnosis comprises a camera device, a main machine box body, a bracket or a trolley. The imaging device comprises a cornea contact lens attached to the surface of the eye to be inspected, an optical imaging system with a large visual field, a high-resolution pattern sensor, an illumination system taking a halogen-like LED lamp as a light source and a focusing system for compensating the ametropia of the eye to be inspected. The illumination system adopts an internal total reflection light guide lens to uniformly illuminate the imaging visual field range of the fundus through the cornea contact lens. The main machine box contains necessary components of the whole set of ophthalmic imaging system such as a miniature industrial personal computer, a mobile power supply, a control console and the like, can be portable and moved to various use environments, and can be simply pushed into a box groove of a bracket or a trolley fixed in a hospital consulting room, so that trolley type and portable integrated use is realized.
Description
Technical Field
The invention belongs to the technical field of ophthalmic medical equipment, and relates to a portable special imaging system for eye diagnosis, which shoots parts such as retina and cornea of human eyes through an imaging device with an interchangeable optical lens and an image sensor.
Background
The eyes are one of the most important organs in the human body, and have indispensable roles in life. Eye disease and vision loss are therefore the most serious problems. Eye diseases and vision problems have profound effects on children, especially newborns. Early examination of the eye early diagnosis is the best opportunity to provide treatment and prevent vision loss.
Eye imaging devices are increasingly important in ophthalmic examinations of the fundus, ocular surface, etc. Although fundus cameras and slit-lamp microscopes have been widely used in the field of retinal and corneal examinations, they are mainly used for adults. For children, especially newborns, the lack of cooperation of the examination process makes it difficult to accurately perform ophthalmic examination, especially for the fundus retina, and the common non-contact fundus camera is completely inapplicable to infants.
The traditional fundus camera and the traditional electronic slit lamp microscope are fixedly connected with the image sensor, so that the optical lens is not replaceable, and the imaging device is required to be replaced when the retina and the cornea are inspected respectively.
Patent CN1226143 implements an image capturing system for imaging an eye, illuminating and photographing the fundus retina in such a manner that the front surface of the optical lens of the camera device is in close proximity to the cornea. The invention adopts the front and rear two-section shell to realize the replacement of the optical lens, but the structure form also causes the illumination optical fiber light guide plate to be divided into front and rear two halves, and two refraction surfaces are generated at the joint to cause the light energy loss. The invention adopts a special light guide plate and the front surface of the combined optical lens to generate larger divergence angle in illumination, but increases the refraction surface on the illumination light path, and further increases the light energy loss. Although this invention also proposes that the light source can be installed in the camera device so that the optical fiber with the light source is not externally supplied to reduce the light loss, it does not explain how to solve the problems of the size of the halogen light source bulb, the lighting control scheme, and the matching with the whole set of imaging systems.
Patent CN104398236a proposes to use an annular light guide plate at the illumination portion of the image pickup device and fix 14 LED lamps at the bottom thereof, which shortens the distance from the light source to the light emitting port of the image pickup device, reduces two refractive surfaces, and reduces the light energy loss, but the light energy loss still exists due to the fact that the illumination light always passes through the front surface of the optical lens. The LED lamps are numerous, the requirements on the size and the performance of the driving circuit are high, the brightness of each lamp is difficult to maintain stable and consistent, if a small number of LED lamps are difficult to detect by a user, but the illumination is uneven. The halogen light source and the LED light source have different penetrability to human eye contents, can not necessarily image retina clearly under the same brightness, and the invention does not describe the standard of selecting the LED lamp.
The CN204293129U, CN101966076a and CN202211674U patents describe a method of illuminating fundus with divergent light generated by optical fiber groups each containing 100 optical fibers, which are arranged in a circle after the first lens at the front end of the optical lens of the image pickup device. However, even the metal structure proposed by CN204293129U is difficult to fix due to the easy crush of the optical fibers, and there is always a small gap to allow the inserted optical fiber group to swing left and right, so that it is impossible to ensure that the whole optical fiber group illuminates the fundus at the same angle. In addition, each optical fiber group consists of more than 100 optical fibers, and is extremely easy to damage in the installation process; when the lens is used for a long time, the optical fiber group cannot be completely fixed on the lens, and the optical fiber group is broken due to pulling, so that the imaging effect is affected.
Besides the effect of illumination and imaging performance of the camera device on the inspection effect, the whole set of imaging system matched with the camera device is also of great importance. The camera device is only used for illuminating and imaging the eyeground or the surface of the eye, and other devices and systems comprising the camera device are also needed, including but not limited to a system combining a whole set of hardware and software such as an illumination light source, a power supply, a controller, image processing, image storage, image output, electromagnetic shielding, patient information management and the like.
Patent CN105451637a proposes a solution comprising a memory, a calculation and communication module, an image calculation module comprising an image processing unit. However, the scheme is also limited to the image pickup device, and is similar to the scheme of a common camera, and is only used for acquiring, simply processing and storing image data; the light source control, power supply schemes, and schemes for connecting to a computer for patient information management of the complete imaging system are not described in detail.
Patent CN105662333a proposes a portable system scheme, a wireless transmission module is installed on a camera device and is used for wireless transmission of an acquired fundus image to an Android mobile terminal device, and illumination light is directly sent to the front end of the camera device through an optical fiber by adopting a medical cold light source. However, in order to meet the fundus camera industry standard, the resolution of the image is required to be 60lp/mm, and the storage space of each shot image is 10-50 MB due to the fact that the angle of view is larger than 130 degrees, the imaging result cannot be displayed in real time on the mobile terminal device through wifi wireless transmission, and large delay is caused; the patent does not explicitly describe whether the medical cold light source is on the camera device or in the mobile terminal device, if the medical cold light source is on the camera device, the camera device is too large to operate, and if the medical cold light source is on the mobile terminal device, an optical fiber is needed for light guiding, so that the design of wireless transmission is meaningless.
Patent CN106488738A proposes an imaging system comprising an image pickup device, an illumination unit, a computing system, a networking unit and a display. However, the light source is singly controlled, and the light source is only used for simple shooting, so that the brightness cannot be adjusted; the wireless part of the networking unit is difficult to display on a computer and a display in real time due to the large storage space of the photographed image, and the wired connection part does not explicitly describe the connection scheme. Another scheme for realizing multi-terminal display like a camera control unit without using a computer is that patient information management is not realized although control is simplified.
Patent CN205903241U proposes a fundus imaging system, which uses a computer and a controller as a core to uniformly control the light source, the image pickup, and the image storage and output. The medical cold light source adopting the halogen lamp is positioned in the host, and an optical fiber is required to be connected with the camera device; because the opening and brightness adjustment of the light source are controlled uniformly, the computer, the cold light source, the controller and the isolation power supply are connected by adopting the solid state relay and the DB9 serial port line respectively, the scheme is complex, and portability is difficult to realize. In addition, the control pedal is also connected to the focusing motor of the image pickup device through the controller, and the controller is stored in the host, so that the image pickup device works more dependently on the host and is difficult to independently use, the host is required to be provided with a medical cold light source, a control computer, an isolated power supply and a display, and is connected with the control pedal, and the host is too large in size and can only be in a floor type or a table type and cannot be portable.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a portable special imaging system for eye diagnosis.
The invention solves the problems in the prior art by adopting various embodiments: the portable imaging system special for eye diagnosis comprises a camera device, a main machine box body and a bearing device, wherein the camera device is connected with the main machine box body, and the main machine box body is positioned on the bearing device; wherein the camera device comprises a housing, an optical imaging system and an illumination system in the housing,
the optical imaging system includes an optical lens and an image sensor.
The optical lens is composed of a plurality of optical lenses having a contact lens, a front lens group, a rear lens group, a focus lens group, and a color filter, the optical lens groups having a common optical axis. Wherein, the front surface of the cornea contact lens is a concave surface with the curvature radius of-7.7 mm, just accommodates the bulge of the examined eye and clings to the cornea surface.
The front lens group can be composed of three lenses and double lenses, and also can be a lens group composed of 5-6 single lenses, the equivalent focal length is positive, and light rays passing through the cornea contact lens at a large angle can be polymerized, so that the overall diameter size of the optical imaging system is narrowed, and the light rays are converted into straighter light rays to be projected to the rear lens group.
The rear lens group has smaller overall diameter and can be composed of a double lens and two other plano-convex lenses or a plurality of single lenses. The equivalent focal length of the rear lens group is negative, the rear lens group and the focusing lens group are combined to image the light rays projected by the front lens group on an image sensor behind the focusing lens group, the image sensor is perpendicular to the optical axis of the optical imaging system, and the center point of the image sensor is penetrated by the optical axis of the optical imaging system.
The focusing lens group consists of a series of lenses with smaller diameters, the equivalent focal length is positive, and the light projected by the lens group is optimized and corrected, so that the divergent light is converged on the image sensor. The focusing lens group can move forwards and backwards along the optical axis of the optical imaging system relative to the rear lens group, light is imaged in front of the image sensor when moving forwards, light is imaged behind the image sensor when moving backwards, and the front-back position deviation is used for compensating the deviation of imaging positions of the eye to be inspected caused by far vision or near vision, namely, conjugation of the fundus of the eye to the image sensor is ensured. The focusing lens group can be driven by a motor to move back and forth along the optical axis of the optical imaging system relative to the rear lens group, and the operation of the motor is manually or automatically controlled by a control device outside the image pickup device.
A color filter is disposed at the rearmost end of the optical lens, perpendicular to the optical axis of the optical lens, for filtering light of wavelengths that are not useful or detrimental to imaging, such as infrared light.
The image sensor is positioned behind the optical lens, perpendicular to the optical axis of the optical lens and positioned on the imaging plane of the optical lens. The optical axis of the optical lens passes through the center of the image sensor. The image sensor may be a three-plate charge coupled device or a three-plate complementary metal oxide semiconductor to ensure that the imaging color is closest to reality. The image sensor preferably adopts four-to-three specifications, and the total number of pixels is more than 800MP, so as to ensure that the central imaging resolution of the optical imaging system is higher than 60lp/mm, and the edge imaging resolution is not lower than 25lp/mm.
The optical lens barrel is composed of integral or split aluminum alloy, and the end of the barrel is provided with a group of screw holes which are fixed with a circuit board of the image sensor through screws or connected with a standard C interface of a camera. Screw holes and positioning pins for fixing the outer shell are arranged on two sides of the lens cone.
The lighting system consists of a light source, a light guide lens and a luminous ring. The light source and the light guide lens are arranged on the periphery of the optical lens, and the light guide lens is cup-shaped and connected with the luminous ring. The precisely processed light guide lens is tightly attached to the front ends of the lens barrel and the shell for fixing. The light source and the heat dissipation plate carrying the light source are fixed with the optical lens barrel through screws and positioning pins. The luminous ring is connected with the cornea contact lens of the optical lens, surrounds the rear side of the outer ring of the cornea contact lens, and is in seamless fit with the cornea contact lens by optical glue.
The light source adopts flat-head LED lamps imitating halogen light sources, the number is 2-4, the diameter is about 3.5mm, the color temperature is about 3000K, the color rendering index Ra is more than 95%, the peak value of the wavelength energy curve is between 620nm and 700nm, the secondary peak value cannot appear in the blue light wavelength section, and the temperature rise is lower than 8 ℃ when the continuous illumination is carried out for 1 hour under the maximum rated power.
The straight part of the front end of the LED lamp is connected with the tail end of the light guide lens, and the light guide lens is in seamless joint with optical glue to reduce unnecessary refraction caused by a refraction surface. The light guide lens is made of internal total reflection optical organic glass, and is designed to totally reflect light rays of the LED lamp and transmit the light rays to the luminous ring with extremely low loss.
The luminous ring is annular or cup-shaped internal total reflection optical organic glass, the rear part of the luminous ring is connected with the light guide lens, and the luminous ring is in seamless joint with optical glue so as to reduce unnecessary refraction caused by a refraction surface. The refractive index of the luminous ring is higher than that of the cornea contact lens so as to ensure that the internal total-emission light cannot be transmitted into the cornea contact lens through the side surface bonding surface, and the appearance of the light guide lens is optically designed so that the internal-conduction light is transmitted through the front bonding surface of the luminous ring and the cornea contact lens while the luminous ring and the side bonding surface of the cornea contact lens are totally reflected. The edge of the cornea contact lens is concave, and the focal length is negative, so that the light transmitted by the luminous ring is further dispersed. The final illumination divergence angle is greater than 150 degrees.
Because the flat-head LED lamp of the halogen-like light source is very high in efficiency, the clinical requirement is met at 20% rated power, and the loss of the light energy of the whole lighting system by the edge of the cornea contact lens can be easily compensated.
The image sensor and the necessary camera shooting control unit are connected with the main machine box body in a wired mode.
The motor of the focusing lens group is connected with a controller in the image pickup device. The illumination system light source is connected with a controller in the camera device.
The controller in the camera device is connected with the main machine box body in a wired mode.
The 2 cables connected with the main machine box body can be shaped into a multi-core cable. The multi-core cable is divided into 2 ports at the end of the main machine box body and is connected with the main machine box body.
Main machine box:
the host box body comprises a box body structure, a miniature industrial personal computer, a display screen, a mobile power supply and a control console. The box body structure is a metal sealing box, and the turnover cover can be opened. And one side of the box body structure is provided with a data converter which is used for butt joint of a connecting cable between the camera device and the main machine box body and data conversion between the camera device and the micro industrial personal computer.
The main machine box body is internally provided with a multi-layer stable structure, wherein one preferable scheme is that a mobile power supply, a micro industrial personal computer and a control console are arranged in layers from bottom to top; the miniature industrial personal computer is connected with the display screen through a video cable. The display screen is located on the box structure flip, and the video line passes through flip junction.
The console can be a fixed platform arranged at the topmost layer of the main machine box body, can also be a wireless mouse and a wireless keyboard, and is a touch screen control panel which can be moved at will and is connected with the micro industrial personal computer in a wireless way. The optional foot switch with the same function as the console can be connected with the micro industrial personal computer in a wired or wireless mode.
The mobile power supply supplies power to electric equipment in the main machine box body. The power supply interface of the mobile power supply extends to the rear side interface board of the box body structure, and the interface board is fixed on the box body. The miniature industrial personal computer is provided with another video output interface besides a video cable connected with the display screen, and also extends to the interface board. The main machine box body can work independently and can also be connected with a network power supply and an external display through a box body structure rear side interface board.
A storage grid is reserved at a spare position in the main machine box body and used for placing the camera shooting handle and the foot switch; and the bottom of the main machine box body is provided with a pulley and a pull rod, and can move in the form of a pull rod box. The desired portability is achieved because the main housing can contain all the necessary components of the present invention and can be moved easily around.
Carrying device:
the carrier means may comprise a stand or trolley, which may be a stand fixed to a wall or floor, or a trolley with casters and movements. Either one of them has the following structure: host chassis slot, console, printer, display and isolated power supply.
Taking a trolley as an example: the main case body can be directly transversely pushed into the main case groove, sliding rails or similar components are arranged in the main case groove to enable the main case body to be smoothly pushed, and a speed reduction anti-collision device is arranged at the end. After the main machine box body is completely installed in the main machine box groove, the power supply and the video signal output of the main machine box body are connected with the trolley. The connection can be selectively connected with a power cable to isolate a power output port of the trolley from a power input port of the main box body interface board, and connected with a display of the trolley and a video output port of the main box body interface board by a video cable. More preferably, the interface on the interface board of the main machine box body is a pin type, the other end of the pin is the inside of the main machine box groove of the trolley, and when the main machine box body is completely pushed into the main machine box groove, the pin device is connected with the pin type interface board, and the electric and video signals of the main machine box body are interacted with the trolley. The inside contact pin of the main case groove is arranged in the trolley and is connected with the trolley isolated power supply and the display.
Therefore, the trolley is essentially a power supply and a video output of the main box.
Meanwhile, the control console of the trolley is in wireless butt joint with the control console of the main cabinet body, and the control console has the same function. If the console of the main machine box is a wireless mouse or a keyboard or a more preferable touch screen control panel which can be moved at will and is in wireless connection with the micro industrial personal computer, the console can be directly taken out from the main machine box and directly placed on the trolley for use.
Drawings
Fig. 1 is a schematic side sectional view of an optical imaging system of an image pickup apparatus of the present invention.
Fig. 2 is a side sectional view of fig. 1 at the time of actual production.
Fig. 3 is a side sectional view of an optical imaging system barrel of the image pickup apparatus of the present invention.
Fig. 4 is a schematic diagram of a connection relationship between an imaging device and a main casing of the present invention.
Fig. 4A is a diagram showing a connection relationship between an imaging device and a main body of the present invention.
Fig. 4B is a diagram illustrating a connection relationship between the camera device and the main casing in another embodiment.
Fig. 4C is a diagram illustrating a connection relationship between the camera device and the main casing in another embodiment.
Fig. 5 is a schematic diagram of a main chassis layout of the present invention.
Fig. 6A is a diagram showing a connection relationship between a main body and a carriage according to the present invention.
Fig. 6B is a diagram showing a connection relationship between the main casing and the cart in other embodiments.
Fig. 7A is a schematic view of the main body of the present invention before loading onto the dolly.
Fig. 7B is a schematic view of the main chassis of the present invention loaded into a dolly.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. The present invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.
Embodiments of the present invention describe a portable eye diagnosis specific imaging system, which in some embodiments may primarily include one camera device 10, a main housing 40, a cradle or trolley 50.
The image pickup device 10 has a large imaging field angle. In some embodiments 130 degrees, and in other embodiments 150 degrees. The image pickup apparatus 10 mainly includes a housing 11, an optical imaging system 20, and an illumination system 30. The optical imaging system 20 includes an optical lens 21 and an image sensor 22.
The optical lens 21 is composed of a plurality of optical lenses having a contact lens 211, a front lens group 212, a rear lens group 213, a focus lens group 214, and a color filter 215, the optical lens groups having a common optical axis 201. The front surface of the contact lens 211 is a concave surface 211a with a curvature radius of-7.7 mm, just accommodating the convex part of the eye 60 to be inspected and closely cling to the surface of the cornea 61. The front lens group 212 has a positive equivalent focal length, the rear lens group 213 has a negative equivalent focal length, and the rear lens group 213 and the focusing lens group 214 combine to image the light beam projected from the front lens group 212 onto the image sensor 22, the image sensor 22 is perpendicular to the optical axis 201, and the center point is penetrated by the optical axis 201. The equivalent focal length of the focusing lens assembly 214 is positive, and the light projected from the rear lens assembly 213 is optimized and corrected to converge the diverging light onto the image sensor 22. The focus lens group 214 moves back and forth along the optical axis 201 with respect to the rear lens group 213, and the eye fundus 602 is conjugated with the pattern sensor 22 in order to compensate for the hyperopia or myopia of the eye 60. The focus lens group 214 is driven by a motor 214a, and the operation of the motor 214a is controlled by the controller 12 in the image pickup apparatus 10. A color filter 215 perpendicular to the optical axis 201 is disposed at the rearmost end of the optical lens 21 to filter infrared light.
The image sensor 22 is located behind the optical lens 20, perpendicular to the optical axis 201, and on the imaging plane 202 of the optical lens 20. The optical axis 201 passes through the center of the image sensor 22. The image sensor 22 is a three-plate charge coupled device or a three-plate complementary metal oxide semiconductor. The image sensor 22 uses four-to-three specifications of 1/2.3 inch and has a pixel count of about 1.6MP, so that the optical imaging system 20 has a center imaging resolution of more than 80lp/mm and an edge imaging resolution of not less than 25lp/mm.
The optical lens barrel 23 is composed of a multi-stage aluminum 6061 barrel, and the end of the barrel 23 has a set of screw holes fixed with the circuit board 221 of the image sensor 22 by screws 231.
In some embodiments, the optical lens barrel 23 is composed of a multi-stage aluminum 6061 barrel, and the end of the barrel 23 has a standard C-interface, not shown, fixed to the circuit board 221 of the image sensor 22.
The illumination system 30 is composed of a light source 31, a light guiding lens 32, and a light emitting ring 33. The light source 31 and the light guiding lens 32 are disposed on the periphery of the optical lens 21, and the light guiding lens 32 is cup-shaped and connected to the light emitting ring 33. The light source 31 and the heat dissipation plate 311 mounted thereon are fixed to the lens barrel 23 by screws and positioning pins. The light source 31 is connected to the controller 12 in the image pickup apparatus 10. The light emitting ring 33 is connected to the contact lens 211 of the optical lens 21 and surrounds the rear side of the outer ring of the contact lens 211, and is attached to the contact lens 211 by optical glue in a seamless manner.
The light source 31 is an LED lamp employing a halogen-like light source, in some embodiments 2 CREE domes XPH50, and in other embodiments 3 CREE flat spots XHP 35. The LED light front end 312 is connected to the distal end 321 of the light guide lens 32. The light guide lens 32 is made of an optical organic glass with total internal reflection, and is designed to totally reflect the light of the LED lamp to the light emitting ring 33. The light emitting ring 33 is annular total internal reflection optical organic glass, and the rear part is connected with the light guide lens 32, so that the unnecessary refraction caused by the refraction surface is reduced by seamless bonding of optical glue. The refractive index of the light emitting ring 33 is higher than the refractive index of the contact lens 211 to ensure that the total internal light is not transmitted into the contact lens 211 through the side contact surface 331, while the light is transmitted through the front contact surface 332 of the contact lens 211 and the light emitting ring 33. The edge 211a of the contact lens 211 is concave and the focal length is negative, so that the light 333 transmitted through the light emitting ring 33 is further dispersed. The final illumination divergence angle is greater than 150 degrees.
The image sensor 22 and the necessary image pickup control unit 221 are connected to the main body 40 via a standard USB3.0 cable 222. The controller 12 in the image pickup apparatus 10 is connected to the main casing 40 via the 2-wire cable 223, and this embodiment does not support a control platform other than the image pickup apparatus 10 to control focusing and illumination brightness.
In some embodiments, the standard USB3.0 cable 222 and the 2-core cable 223 are combined into a 12-core, specialty, plug-in cable 224.
In some embodiments, controller 12 within camera device 10 is connected to main housing 40 with a 9-conductor cable 225. This embodiment supports a control stage other than the image pickup apparatus 10 to control focusing and illumination brightness.
Various embodiments of the present invention have a main housing 40. The main case 40 includes a case structure 41, a micro industrial personal computer 42, a display screen 43, a mobile power supply 44, and a console 45.
The case structure 41 is configured as a specially-made aluminum alloy sealed safety case, and the case cover 411 can be opened by being turned up transversely. One side of the box structure 41 houses a data converter 412. In some embodiments, the data converter 412 includes a standard USB3.0 interface 412a and a 2-core aviation plug interface 412b. In some embodiments, the data converter 412 has 1 12-core aviation interface 412c thereon. In some embodiments, the data converter 412 has 1 9-core aviation interface 412d thereon.
The mobile power supply 44, the micro industrial personal computer 42 and the console 45 are arranged in the main machine box 40 from bottom to top in a layered mode, and the console 45 is a wireless keyboard and mouse combination. The display 43 is located inside the case lid 411. The mobile power supply 44 has a plurality of electrical outlets and 1 electrical inlet. Power is supplied to the microcomputer 42, the display screen 43, and the controller 12 of the image pickup apparatus 10, respectively. The rear side of the box structure 41 is provided with an interface board 413 which is provided with a power socket 413a for inputting electricity to the mobile power supply 44 and a video socket 413b for outputting additional video signals of the micro industrial personal computer 42, and is connected with related equipment or components of the trolley 50 by cables.
In some embodiments, a pin device 413c is employed on the interface board 413, in lieu of a power socket and video socket. The pin device 413c is connected to the pin device 511 of the carriage 50.
The main housing 40 has a storage compartment 46 therein for storing the camera device 10 and a console 45 when not in operation. In some embodiments, the main housing 40 also has casters and ties, not shown, for movement.
In the portable embodiment, the main housing 40 is configured to be used alone when the power of the portable power source 44 is sufficient after being matched with the image capturing apparatus 10.
In the carriage type embodiment, the main body 40 and the imaging device 10 are used in combination with the carriage 50. The main box 40 is placed in the main box groove 51 of the trolley 50, and the main box groove 51 reserves a cable hole for connecting the cable 521 and the cable 531 of the isolated power supply 52 and the display 53 of the trolley 50 to the power supply jack 413a and the video jack 413b of the main box 40, respectively. In some embodiments, pin device 511 is directly connected to isolated power source 52 and display 53 in mainframe box 51, and pin device 413c and pin device 511 are fully engaged when mainframe box 40 is fully pushed into mainframe box 51. In some embodiments, at least 1 of the slide rails 512 assembled with dampers are mounted on the bottom of the main chassis slot 51 so that the main chassis 40 is pushed into the main chassis slot 51 at a uniform speed without collision.
In some embodiments, the cart 50 has a fixed console thereon, not shown, that is connected to the micro industrial personal computer 42 in the main housing 40 by wireless signals. When the main body 40 is pushed into the main body groove 51 and connected, the console is used for replacing the console 45 of the main body 40 to operate. In other embodiments, the fixed console is not disposed on the carriage 50, and the console 45 of the main body casing 40 is taken out and placed on the carriage 50 for operation. The above-described embodiments are both trolley and portable.
In some embodiments, such as a rack, the main housing 40 and the camera device 10 are used with a rack, not shown. The main case 40 is placed in the main case groove 51 of the bracket, and the main case groove 51 reserves a cable hole for connecting the cable 521 and the cable 531 of the isolated power supply 52 and the display 53 of the bracket 501 to the power outlet 413a and the video outlet 413b of the main case 40, respectively. In some embodiments, pin device 511 is directly connected to isolated power source 52 and display 53 in mainframe box 51, and pin device 413c and pin device 511 are fully engaged when mainframe box 40 is fully pushed into mainframe box 51. In some embodiments, at least 1 of the slide rails 512 assembled with dampers are mounted on the bottom of the main chassis slot 51 so that the main chassis 40 is pushed into the main chassis slot 51 at a uniform speed without collision.
In some embodiments, a stationary console, not shown, is provided on a support, not shown, that is connected to the micro industrial personal computer 42 within the main housing 40 with wireless signals. When the main body 40 is pushed into the main body groove 51 and connected, the console is used for replacing the console 45 of the main body 40 to operate. In other embodiments, the fixed console is not disposed on the stand, but rather the console 45 of the main housing 40 is removed from the stand for placement thereon. The above-described embodiments are bracket-type and portable integrated.
Although the invention has been disclosed in terms of exemplary embodiments, those skilled in the art will recognize and appreciate that additions, deletions, modifications, and variations may be made to the disclosed embodiments without departing from the scope of the invention. The foregoing detailed description is provided to illustrate the invention, not to limit the invention. Any modifications and changes made to the present invention fall within the spirit of the invention and the scope of the appended claims.
Claims (7)
1. The portable imaging system special for eye diagnosis comprises a camera device, a main machine box body and a bearing device, wherein the camera device is connected with the main machine box body in a wired mode, and the main machine box body is positioned on the bearing device; the camera device comprises a shell, an optical imaging system and an illumination system, wherein the optical imaging system and the illumination system are arranged in the shell, the optical imaging system comprises an optical lens and an image sensor, and the image sensor is positioned behind the optical lens; the lighting system consists of a light source, a light guide lens and a light-emitting ring, wherein the light source and the light guide lens are positioned on the periphery of the optical lens, the precisely-machined light guide lens is tightly attached to the front end of the optical lens barrel and the front end of the shell for fixation, and the light source and a heat dissipation plate carrying the light source are fixed with the optical lens barrel through screws and positioning pins; the host box comprises a box structure, a micro industrial personal computer, a display screen, a mobile power supply and a console; the carrying device comprises a main case groove, a console, a printer, a display and an isolated power supply;
the optical lens consists of a cornea contact lens, a front lens group, a rear lens group, a focusing lens group and a color filter, wherein the cornea contact lens, the front lens group, the rear lens group, the focusing lens group and the color filter are sequentially arranged and have a common optical axis, the front surface of the cornea contact lens is a concave surface with the curvature radius of-7.7 mm, the front lens group consists of three lenses and two lenses or consists of 5-6 single lenses, the diameter of the rear lens group is smaller than that of the front lens group, the rear lens group consists of two lenses and two other plano-convex lenses or consists of a plurality of single lenses, the focusing lens group consists of lenses with the diameter smaller than that of the rear lens, and the color filter perpendicular to the optical axis of the optical lens is arranged at the rearmost end of the optical lens; the image sensor is positioned behind the optical lens, is perpendicular to the optical axis of the optical lens and is positioned on the imaging plane of the optical lens; the optical axis of the optical lens passes through the center of the image sensor; the image sensor can be a three-piece charge coupled device or a three-piece complementary metal oxide semiconductor, the image sensor adopts four-to-three specifications, and the total number of pixels is more than 800MP, so that the central imaging resolution of the optical imaging system is ensured to be higher than 60lp/mm, and the edge imaging resolution is ensured to be not lower than 25lp/mm;
in the lighting system:
the light source adopts a flat-head LED lamp imitating a halogen light source, the straight part at the front end of the LED lamp is connected with the tail end of a light guide lens, the light guide lens is made of internal total reflection optical organic glass, and the shape is designed to totally reflect the light of the LED lamp and transmit the light to the luminous ring with extremely low loss;
the luminous ring is annular or cup-shaped internal total reflection optical organic glass, the rear part of the luminous ring is connected with the light guide lens, and the luminous ring is in seamless joint with the light guide lens through optical glue so as to reduce unnecessary refraction caused by a refraction surface;
the light guide lens is connected with the light emitting ring in a cup shape, the light emitting ring is connected with the cornea contact lens of the optical lens and surrounds the rear side of the outer ring of the cornea contact lens, the light emitting ring and the cornea contact lens are in seamless joint with each other by optical glue, a side joint surface and a front joint surface are formed between the light emitting ring and the cornea contact lens, the refractive index of the light emitting ring is higher than that of the cornea contact lens, so that internal total emitted light cannot be transmitted into the cornea contact lens through the side joint surface, the light is transmitted through the front joint surface, the edge of the cornea contact lens is concave, the focal length is negative, and the light transmitted from the light emitting ring is further diffused.
2. The portable eye-diagnosis specific imaging system of claim 1, wherein: the motor of the focusing lens group is connected with the controller in the image pickup device, the light source of the lighting system is connected with the controller in the image pickup device, the controller in the image pickup device is connected with the main machine box body in a wired mode, the 2 wired modes connected with the main machine box body adopt cables, and the form of the cable can be made into a multi-core cable which is divided into 2 ports at the end of the main machine box body and is connected with the main machine box body.
3. The portable eye-diagnosis specific imaging system of claim 1, wherein: the number of the LED lamps is 2-4, the diameter is about 3.5mm, the color temperature is about 3000K, the color rendering index Ra is greater than 95%, the peak value of the wavelength energy curve is between 620nm and 700nm, the secondary peak value cannot appear in the blue light wavelength section, and the temperature rise is lower than 8 ℃ when the LED lamps are continuously illuminated for 1 hour under the maximum rated power.
4. The portable eye-diagnosis specific imaging system of claim 1, wherein: the host box comprises a box structure, a micro industrial personal computer, a display screen, a mobile power supply and a console; the box body structure is a metal seal box, the flip cover can be opened, a data converter is arranged on one side of the box body structure, a multi-layer stable structure is arranged in the main machine box body, and a mobile power supply, a micro industrial computer and a control console are arranged in the multi-layer stable structure and are layered from bottom to top; the miniature industrial personal computer is connected with the display screen through a video cable, the display screen is positioned on the turnover cover of the box body structure, the video cable passes through the joint of the turnover cover, the console is arranged on a fixed platform at the topmost layer of the box body of the host computer, and the miniature industrial personal computer can also be a wireless mouse and a keyboard, and the preferable scheme is a touch screen control panel which can be moved at will and is connected with the miniature industrial personal computer in a wireless way; the optional foot switch with the same function as the console can be connected with the micro industrial personal computer in a wired or wireless mode;
the power supply interface of the mobile power supply extends to the rear side interface board of the box body structure, the interface board is fixed on the box body, the micro industrial personal computer is provided with another video output interface besides a video cable connected with the display screen, the micro industrial personal computer also extends to the interface board, the box body of the main machine can work independently, and the micro industrial personal computer can also be connected with the network power supply and the external display through the rear side interface board of the box body structure; a storage grid is reserved at a spare position in the main machine box body and used for placing the camera shooting handle and the foot switch; and the bottom of the main machine box body is provided with a pulley and a pull rod, and can move in the form of a pull rod box.
5. The portable eye-diagnosis specific imaging system of claim 1, wherein: the carrying device comprises a main case groove, a control console, a printer, a display and an isolation power supply, wherein the main case body can be directly transversely pushed into the main case groove, a sliding rail or a similar component is arranged in the main case groove to enable the main case body to be smoothly pushed in, a speed reduction anti-collision device is arranged at the end, after the main case body is completely arranged in the main case groove, the power supply of the main case body is connected with a trolley through a video signal output, the connection can be selectively realized through a power cable to connect a trolley isolation power supply output port with a power supply input port of a main case body interface board, and the video cable to connect the display of the trolley with a video output port of the main case body interface board.
6. The portable eye-diagnosis specific imaging system of claim 1, wherein: the carrying device is a bracket or a trolley, an interface on the interface board of the main machine box body is a pin type, the other end of the pin is arranged in the main machine box groove of the trolley, and after the main machine box body is completely pushed into the main machine box groove, the pin device is connected, and the electric and video signals of the main machine box body are interacted with the trolley; the inside contact pin of the main case groove is arranged in the trolley and is connected with the trolley isolated power supply and the display.
7. The portable eye-diagnosis specific imaging system of claim 1, wherein: the lens barrel of the optical lens is composed of integral or split aluminum alloy, the tail end of the lens barrel is provided with a group of screw holes which are fixed with a circuit board of the image sensor through screws, or is connected with the circuit board through a standard C interface of a camera, and two sides of the lens barrel are provided with screw holes and positioning pins which are used for fixing with a shell.
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| CN201710809161.9A CN107468208B (en) | 2017-09-10 | 2017-09-10 | Portable special imaging system for eye diagnosis |
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| CN201710809161.9A CN107468208B (en) | 2017-09-10 | 2017-09-10 | Portable special imaging system for eye diagnosis |
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| CN109259737A (en) * | 2018-10-30 | 2019-01-25 | 安徽维视阅医疗技术有限公司 | A kind of contact Systems for optical inspection and the detection device using the system |
| CN109259736A (en) * | 2018-10-30 | 2019-01-25 | 安徽维视阅医疗技术有限公司 | A kind of optical lens system and the detection device using the system |
| CN110251077A (en) * | 2019-01-30 | 2019-09-20 | 北京大学第三医院（北京大学第三临床医学院） | A kind of ophthalmology camera arrangement and ophthalmology photographic method |
| CN109998475A (en) * | 2019-05-07 | 2019-07-12 | 杭州智诠科技有限公司 | A kind of ophthalmoscopic image check device |
| CN113648094B (en) * | 2021-08-11 | 2023-10-27 | 苏州喆安医疗科技有限公司 | Split type oral cavity digital impression instrument |
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