13 results about "Fundus camera" patented technology

The application provides an ophthalmic image diagnosis method and system based on multi-modal imaging cooperation, and relates to the technical field of medical image diagnosis. First, the OCT, fundus camera and ultrasonic original image data of an ophthalmic examination object are acquired, and multi-modal dynamic correlation mapping results are obtained through dynamic correlation and trend correlation processing. Cross-modal lesion feature progressive mining and interactive verification are performed to obtain a cross-modal lesion correlation feature set. Multi-modal cooperative diagnosis reasoning and weight feedback optimization are used to generate an ophthalmic disease reasoning result containing disease types, lesion dynamic distribution and reasoning confidence. Finally, an ophthalmic diagnosis report with dynamic labeling and confidence explanation is generated. The application comprehensively utilizes the advantages of various image technologies to improve the accuracy of ophthalmic image diagnosis.

This application discloses a driving device, belonging to the field of fundus camera technology. The coupling and drive motor of the driving device can be integrated into two mounting positions of a bracket, respectively. Therefore, during bracket manufacturing, the preset positional accuracy of the two mounting positions can be easily controlled. After the drive motor is fixed to the bracket, the output shaft is inserted into the second connecting hole of the coupling. Simultaneously, during bracket manufacturing, the preset positional accuracy of the drive screw's mounting position relative to the first and second mounting positions can also be controlled. Furthermore, while leaving an assembly gap between the first end of the drive screw and the first connecting hole of the coupling, the two sets of snap-fit ​​surfaces are engaged. Thus, after the drive motor and coupling are assembled, the first end of the drive screw can be inserted into the first connecting hole, eliminating the need for repeated adjustments to the assembly accuracy between the coupling and the screw, reducing the number of assembly parts and lowering assembly costs.

The application relates to the technical field of contrast auxiliary devices, and discloses an eye fundus imaging device positioning auxiliary device which comprises a supporting base, a guide rod is fixedly installed at the top of the supporting base, a rotating shaft three is driven to rotate through a rotating knob, the rotating shaft three drives an umbrella-shaped tooth two to mesh with a conical tooth two to rotate, the rotating shaft two, the conical tooth one and the umbrella-shaped tooth one are matched with synchronous transmission, power is transmitted to a rotating shaft one, a convex connecting pin is lapped through electromagnetic coil magnetization iron core adsorption, then the double worm gears synchronously mesh with the worm wheel to drive the transmission screw rod, so that the different patient height adaptation requirements are realized, secondly, the rotating knob is matched with another group of electromagnetic coil magnetization iron core adsorption convex connecting pin lapping, the fixed shaft and the gear are driven to rotate, the gear meshes with the rack to drive the inclined block two to slide, the arc-shaped supporting plate is pushed to adjust the posture, then the eye fundus imaging eye position is matched, so that the cumbersome process of multiple operation piece switching is avoided, and the demand of multiple eye position examination is met.

The application provides an eye fundus image acquisition method and device based on an eye fundus camera. A first eye position shooting request is received, and an internal fixation light mark is set to move a preset distance in a nasal direction in a center area of a display interface. A preview image of an eye of a detected person is acquired by a preview image acquisition unit, and a macula, a disc, and an artifact of the preview image are identified. When the artifact does not block a macula position and a disc position, an eye fundus image of the eye of the detected person is acquired by an eye fundus image capture unit. When the artifact blocks the macula position and / or the disc position, the internal fixation light mark is moved between the macula and the disc. This method can change the response position of the internal fixation light by adjusting the internal fixation light mark, so that the artifact in the finally acquired eye fundus image does not block the macula position and the disc position, thereby effectively avoiding information loss and helping doctors diagnose diseases.

The application discloses an optical system for fundus imaging and a fundus camera thereof. The optical system for fundus imaging comprises an illumination assembly, an imaging assembly, an objective lens assembly and a diaphragm structure. The illumination assembly comprises a light source, and an illumination light path is formed between the light source and an examination position to provide an illumination beam to irradiate a pupil. The imaging assembly comprises an imaging element to form a fundus image, and an imaging light path is formed between the imaging element and the examination position. The objective lens assembly is arranged in the illumination light path and the imaging light path, and an objective lens optical axis is formed between the objective lens assembly and the examination position. The illumination light path and the imaging light path are arranged at an angle and are separately arranged on two sides of the objective lens optical axis. The diaphragm structure comprises a first light-transmitting part arranged in front of the imaging element to allow a fundus-reflected light beam to pass through. In the case of allowing the fundus-reflected light beam to pass through the imaging light path, optical ghost images caused by stray light reflected by the objective lens assembly are eliminated.

The application provides an optical system of a fundus camera, which comprises an ocular lens, an aperture diaphragm, an aberration-correcting lens group, a field lens group, a half-transmission half-reflection mirror and an imaging lens group, light of a light source is irradiated to a pupil through the ocular lens, the light goes out from the pupil and sequentially passes through the ocular lens, the aperture diaphragm, the aberration-correcting lens group and the field lens group to reach the half-transmission half-reflection mirror, 50% of the light transmits through the half-transmission half-reflection mirror to the imaging lens group and is imaged on a CCD, and the other 50% of the light is reflected by the half-transmission half-reflection mirror and is used for connection with a wavefront sensor, and the field lens group comprises a deformable mirror.The application realizes synchronous and efficient collection of high-resolution fundus imaging and high-precision wavefront sensing by optimizing the structure of the aberration-correcting lens group, integrating the field lens group and the deformable mirror and adopting the half-transmission half-reflection mirror light splitting design, and the imaging quality, light energy utilization rate and functional integration degree of the system are improved, and the high-performance requirement of the fundus camera in modern ophthalmic diagnosis and treatment is met.

A portable remote fundus camera comprises an ear-hung frame, an automatic zoom lens for fundus photography, a control box, the control box is provided with a lens mounting through hole, a plurality of first contact points are arranged in the lens mounting through hole, the first contact points are electrically connected with a control circuit board arranged in the control box, the control circuit board is provided with a wireless control module for receiving remote control commands; one end of the automatic zoom lens is provided with a plurality of second contact points, the automatic zoom lens is mounted in the lens mounting through hole, so that each second contact point is in contact with the corresponding first contact point; the frame of the ear-hung frame is a rectangular frame, the control box is movably arranged in the rectangular frame, so that the automatic zoom lens can be aligned with the left eye or the right eye, a supporting bracket is arranged at the back of the rectangular frame, the edge of the supporting bracket in contact with the forehead of the patient is a concave arc edge, and a first positioning groove is arranged at the position of the supporting bracket in contact with the bridge of the nose of the patient.

The present disclosure relates to an apparatus for eye detection. The apparatus comprises: a fundus camera comprising at least a front lens barrel assembly and a rear lens barrel assembly, and configured to perform a photographing operation on a fundus of an eye, wherein the front lens barrel assembly comprises at least an objective lens; an optometry instrument sharing the objective lens with the fundus camera, and configured to perform an optometry operation on an eye; and a mirror assembly arranged between the front lens barrel assembly and the rear lens barrel assembly, and configured to switch an internal light path of the apparatus so that the apparatus is correspondingly in a fundus camera mode for performing the photographing operation or in an optometry instrument mode for performing the optometry operation. With the solution of the present disclosure, the fundus camera and the optometry instrument can be implemented in one device, and the detection efficiency is improved.

This invention relates to the field of binocular lens calibration technology and discloses an automatic height difference calibration system for a portable fundus camera's binocular lens. The system includes an adjustment base, a binocular lens assembly, and a standard circular feature calibration target. A bracket is fixedly connected to the bottom inner side of the adjustment base, and a moving platform is mounted on the top of the bracket. An image acquisition module is fixedly connected to one side of the binocular lens assembly, and this module is used to acquire images of the standard circular feature calibration target. A calculation compensation module is fixedly connected to the top left side of the adjustment base. This invention utilizes a stacked three-axis moving platform, employing motors one, two, and three to drive the binocular lens assembly to precisely displace along the Y, X, and Z axes respectively. Combined with the collaborative work of the image acquisition module and the calculation compensation module, this achieves automated acquisition and processing of calibration data.

Introduced here are approaches to generating an image with a fundus camera based on parameters determined through modeling of eye motion. The method captures a series of images to generate pupil position data over time. Using this data, the method determines a model for estimating pupil positions and predicts a time associated with a minimum pupil velocity. The method can estimate the pupil position at this time and generate a fundus camera configuration based on the position. The method can transmit a command to capture an image of the eye using the fundus camera configuration. By implementing these approaches, an imaging system can improve the quality of retinal imaging for patients with eye motion.

A fully-automatic photography method for a fundus image includes moving a lens of the fundus camera to align with the pupil, controlling the lens to approach the eyeball and capturing an image, the image being formed by an illuminating beam reflected by the cornea, determining a working distance by using the image, adjusting the focal length, capturing a fundus image, and determining a photography focal length by using the fundus image, and photographing a fundus image by using the photography focal length on the working distance.

The application provides a retinal image sequence registration method based on longitudinal three-dimensional fundus examination scene modeling, and belongs to the field of retinal image registration. The method develops a more comprehensive and more universal transformation model, which is used for global registration of retinal image sequences in longitudinal research. Specifically, according to the process of imaging the retina by a fundus camera and the change of the shape of the eyeball in the natural growth or disease progression process, a 3D space-time model simulating the longitudinal fundus examination scene is constructed. The patent uses a joint registration strategy of frame-to-reference and frame-to-frame, realizes a retinal image sequence registration framework (RISeR) based on the 3D space-time model, and aligns all images in the sequence to the same longitudinal 3D fundus examination scene by using a matching key point between the retinal images as a medium and adopting a pose estimation and optimization algorithm.

1. Name of the designed product: fundus photographing device. 2. Use of the designed product: used for the construction of the optical path of the fundus imaging system. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.