Patent Publication Number: US-2022218200-A1

Title: Additional floodlight projection device based on ophthalmic slit lamp and image analysis system

Description:
TECHNICAL FIELD 
     The present invention relates to the technical field of ophthalmic medical equipment, specifically to an additional pan-light projection device and an image analysis system based on an ophthalmic slit lamp. 
     BACKGROUND TECHNOLOGY 
     As the most widely used pathological examination equipment in ophthalmic medicine, the eye is based on the following two basic equipment structural devices, namely the slit light projection device and binocular microscopy observation device (or digital imaging recording device), irradiation the depth of the eye with slit strong light at the appropriate angle and width, to achieve binocular high times microdetailed observation and obtain pathological images. 
     However, the pathological observation of the surface body condition of the eyeball cornea is a function that this kind of ophthalmic special medical equipment does not have. Therefore, the eye slit lamp microscopy instrument, as a platform with microobservation ability, still has the space to expand and utilize its function. 
     Clinical requirements for special pathological observation of the cornea based on ophthalmology, The invention develops a special additional device for the principle of mesh imaging required for the surface shape and condition of the eye, Without affecting the function of the original equipment, Can be based on the desktop eye slit lamp microscope instrument as a platform, A variety of mesh mapping maps with special purpose design, The realization lies in the comprehensive functional expansion of the pathological observation of both the internal depth state and the surface shape of the eye slit lamp microscope detector; and, A higher-resolution corneal surface mesh mapping image can be obtained with the binocular microscope observation device and the digital image acquisition function, Can use its independent and unique system professional digital image analysis process, Intelligent enhancement for the pathological observation means and judgment method under the principle of corneal surface deformation. 
     CONTENT OF INVENTION 
     In view of this, the object of the present invention is to provide an ophthalmic image analysis system based on an ophthalmic slit lamp and an additional optical projection device to improve and expand the professional technical means of this type of ophthalmic pathology examination device, and a variety of special purposes can be projected on the corneal surface of the eye, thus directly using the binocular microscope device of the ophthalmic slit lamp microscope detector and corresponding pathological analysis. 
     To achieve the above purpose, the technical schemes adopted in the present invention are as follows: 
     An additional pan-light projection apparatus and an image analysis system based on ophthalmic slit lamp, including a slit lamp microscope detector, key to further comprising a pan-light projection apparatus, an image acquisition apparatus, and an image analysis apparatus, wherein: 
     The removable rotation of the pan projection device is attached to the slit lamp microscope detector for forming a pan map pattern with a special mesh pattern on the surface of the cornea to be detected; 
     The image acquisition apparatus is used for optical image acquisition of a optical map graph formed on the detected corneal surface through the optical aperture, forming an inspection data packet, and transmitting to the image analysis apparatus; 
     The image analysis apparatus is used to process the obtained inspection data package, data filtering contrast measurement, pathological analysis to obtain the pathological examination results. 
     Further, the floodlight projection device comprises a flood projection structure and a projection light source attached to the slit lamp microscope detector object with an arm attached at a free end rotated attached to the slit lamp microscope detector, which may image the desired projection pattern with a special mesh on the surface of the cornea to be detected. 
     Further, the center of the projection structure opens an optical aperture along its axis, 
     Further, the projection pattern may be quickly replaced by the positioned slide pattern insert. 
     Further, the projection light source adopts a reflective color filter universal light source in an annular arrangement and collinear with the centerline of the projection structure. 
     Further, a result printing device which can print the results of computer software assisted analysis obtained from the independent digital image acquisition processing analysis system. 
     The remarkable effect of the present invention are: 
     1, The present invention is based on a desktop eye slit lamp microscope, and the original function of the eye slit lamp microscope is not changed and limited, realizing the pathological function of the internal depth and surface shape; 
     The 2, flood projection device is designed to swing completely in the front area of the ocular binocular microscope objective to be moved to a non-working position without use, without hindering the normal use of the ophthalmic slit lamp microscope projector with high convenience of use; 
     3, can not only directly observe a variety of optical mesh mapping graphs with special purpose designs on the corneal surface. 
    
    
     
       APPENDIX DESCRIPTION 
         FIG. 1  is a principle block diagram of the present invention; 
         FIG. 2  is a schematic structural diagram of the floodlight projection device; 
         FIG. 3  is a schematic diagram of the use status of the flood light projection device; 
         FIG. 4  is a working flow chart of the present invention. 
     
    
    
     SPECIFIC IMPLEMENTATION MODE 
     The specific embodiment of the working principles and the present invention are further explained in detail in combination with the drawings. 
     As shown in  FIG. 1 , an eye image analysis system based on an eye slit lamp and an additional flood light projection apparatus includes a slit lamp microscope detector  20 , an image acquisition apparatus  30 , an independent image analysis apparatus  40 , and a result printing apparatus  50 , wherein: 
     The removable rotation of the pan projection device  10  is connected to the slit lamp microscope detector  20  for forming a pan map pattern with a special mesh on the surface of the cornea to be detected; 
     The image acquisition apparatus  30  is used for optical image acquisition of detecting an optical map graph formed on the surface of the cornea through an optical aperture, forming an inspection data packet, and transmitting it to the image analysis apparatus  40 ; 
     The image analysis device  40  is used to perform process processing, data filtering comparison measurement, pathological analysis to obtain pathological examination results; wherein the process processing includes filtering and strengthening the graphical data in the inspection package; the data filtering comparison measurement function refers to graphic alignment screening and data measurement with the graphics stored in the standard graphics library within the image analysis device  40  to extract the drawing with pathological changes and then provide a basis for pathological analysis; 
     The result printing apparatus  50  is used to print the pathological examination results obtained from the image analysis apparatus  40 . 
     In this example, the slit lamp microscope detector  20 , the image acquisition device  30 , and the result printing device  50  may all be devices in the prior art, and the specific structure may not be described here. 
     The image combination analysis system of the present invention is based on an optical microscope structure of a slit lamp, Project the images, figures, and lines projected from the internal light source of the flood projection device  10  on the corneal surface of the eye, Image images, figures, line shape projections on the corneal surface, Observation of different magnification (6×, 10×, 15×, 25.6×, 40×) was performed using the optical microscope of the eye slit lamp microscope  20  itself, The image acquisition apparatus  30  then digitally takes an optical mapping pattern detecting the formation of the corneal surface, Realize the optical image acquisition, After forming the inspection packet, it is sent to the image analysis device  40  for process processing, data filtering contrast determination, and pathological analysis, Pathological examination results are obtained and printed by the result printing device  50 . 
     Refer to Supplementary  FIG. 2  and Supplementary  FIG. 3 , The floodlight projection device is located between the eye and the slit lamp microscope detector  20  when use, It includes an outer cover  11 , and a projection structure  12  and a projection light source  13  disposed within the outer cover  11 ; Arms  14  are fixed to the side wall of the outer cover  11 , The free end of the arm  14  is used for rotational connection to the slit lamp microscope detector  20 , A mounting chamber  15  is provided at the center of the outer cover  11 , The projection light source  13  is embedded in the inner wall of the mounting chamber  15 , The projection structure  12  is provided in the mounting cavity  15  and is provided close to the projection light source  13 , The projection structure  12  is disposed close to the slit lamp microscope detector  20 , The projection light source  13  forms a pan-optical projection channel with the projection structure  12  along the axis of the through hole  15 . 
     In  FIG. 2 , the center of the projection structure  12  is axially provided with an optical channel  16 , the projection pattern of which can be rapidly replaced by a positioned slide pattern insert. 
     In this example, the projection light source  13  adopts a reflective color filter universal light source, which is arranged annular and collinear with the centerline of the projection structure. Moreover, the projection light source  13  is a flexible replacement structure. 
     The projection light source has a hole in the middle of the projection light source  13  to facilitate the optical microscope of the eye slit lamp microscope  20  to observe the projection to the corneal surface of the eye. Through digital image acquisition of the eye optical mapping graph, an independent intelligent procedural professional pathological analysis can be performed. 
     The floodlight projection device  10  acts only as an additional device and does not affect the main function and other additional functions of the slit lamp, except the increased function of the slit lamp microscope detector  20 , according to  FIG. 2  designed to swing in the front area of the binocular microscope objective  20  which is moved to a non-working position without hindering the normal use of the slit source projection device of the ophthalmic slit lamp microscope detector  20 . The specific connection mode is between the floodprojection device  10  and the slit lamp microscope detector  20 , that is, the floodlight projection device  10  to the optical microscope of the eye slit lamp microscope  20  through the arm  14 , and can be rotated left and right, and back and forth. 
     In  FIG. 3 , The slit lamp microscope detector  20  includes a platform moving assembly  21 , a control handle  22 , a bracket  23 , a cheek bracket  24 , a viewing assembly  25 , a lighting assembly  26 , and a digital assembly  27 , The control handle  22  is provided on the right side of the platform mobile assembly  21 , The bracket  23  is connected to the middle of the platform mobile assembly  21 , The cheek support  24  is connected to the left side of the platform mobile assembly  21 , The observation assembly  25  is attached to the illumination assembly  26  on the bracket  22 , The optical projection device  10  is rotary connected to the rotating shaft on the bracket, The digital assembly  27  is connected below the observation assembly  25 . 
     As shown in  FIG. 4 , the workflow of the system of the present invention is as follows: 
     Step  1 : A floodlight map pattern with a special mesh is formed on the corneal surface to be detected by the floodlight projection device  10 , and conventional detection of the detected cornea by the slit lamp microscope detector  20 ; 
     Step  2 : The image acquisition apparatus  30  performs optical image acquisition with the detected corneal surface formation, realizes the graph acquisition and forms the inspection data packet, and transmits the inspection data packet to the image analysis apparatus  40 ; 
     Step  3 : The image analysis device  40  filters and strengthens the graphics data in the inspection data packet and compares the standard graphics stored in the standard graphics library of the image analysis device  40 , so as to extract the graphics with pathological changes, and then obtain the pathological examination results after the pathological analysis; 
     Step  4 : The pathological examination result is printed using the result printing device  50 . 
     The present invention is a platform according to a desktop eye slit lamp microscope  20 , If the original function of the eye slit lamp microscope  20  is not altered and restricted, The pathological shape that change on the surface of the cornea can be directly observed, And through the digital imaging acquisition function can obtain a higher resolution corneal surface mesh mapping image for independent intelligent procedural professional pathology analysis, Intelligent pathological observation means and judgment method under the principle of corneal surface deformation are realized, Thus, the professional technical means of pathological examination using the ophthalmic slit lamp microscope instrument  20  were improved and expanded. 
     The technical scheme provided by the present invention is described in detail above. The principles and embodiment of the embodiments are only used to help understand the method of the invention and its core ideas. It should be noted that for those generally skilled in the art, several improvements and modifications of the invention may be made without departing from the principles of the invention, which also fall within the protection of the invention. 
     The invention disclosed an additional pan-optical projection device and an eye image analysis system based on an eye slit lamp, Including a crack lamp microscope detector, a flood projection device, an image acquisition device, an image analysis device, The removable rotation of the floodlight projection device is attached to the slit lamp microscope detector, Used to form a optical map pattern with special mesh lines on the surface of the cornea to be detected; The image acquisition apparatus is used to acquire optical images by an optical aperture for the corneal surface, Form the check packet, And sent to the image analysis device; The image analysis apparatus is used for flow processing, data filtering and comparative analysis of the acquired inspection packet, and pathological analysis, Results of the pathological examination were obtained. Its remarkable effect is: improve and expand the professional technical means of using the eye slit lamp microscope instrument for pathological examination.