150 results about "Ophthalmoscopes" patented technology

An adapter system connects a smart-phone or other camera to an ophthalmoscope or other viewing instrument at multiple locations with a single bracket. A fitting attached to the bracket connects the adapter to the viewing instrument in the region near its view port, close to the optical axis. A brace attached to the bracket connects the adapter to the viewing instrument in the region of the instrument's handle or other support structure, located away from the optical axis. The brace has a frame that holds the camera in place and aligns the camera lens with the optical axis of the instrument. The processor of the smart-phone or other mobile communications device can provide specific information related to the particular viewing instrument and can also be used in the operation and control of smart-scope instruments through a communications link.

Real time, high-speed image stabilization with a retinal tracking scanning laser ophthalmoscope (TSLO) enables new approaches to established diagnostics. Large frequency range (DC to 19 kHz), wide-field (40-deg) stabilized Doppler flowmetry imaging is described for human subjects. The fundus imaging method is a quasi-confocal line-scanning laser ophthalmoscope (LSLO). The retinal tracking system uses a confocal reflectometer with a closed loop optical servo system to lock onto features in the ocular fundus and automatically re-lock after blinks. By performing a slow scan with the laser line imager, frequency-resolved retinal perfusion and vascular flow images can be obtained free of eye motion artifacts.

The invention is an eye viewing device having an eyepiece at an observer end thereof and an imaging element at an observation port thereof. Light that is reflected from an imaged eye of a patient is provided to either or both of the eyepiece and the imaging element. A practitioner can view the imaged eye, and can sequentially image the same region of the imaged eye for recording, documentation, and/or analysis.

A first optical module scans a portion of an eye with a line of light, descans reflected light from the scanned portion of the eye and confocally provides output light in a line focus configuration. A detection device detects the output light and images the portion of the eye. A second optical module detects an optical distortion and corrects the optical distortion in the line of light scanned on the portion of the eye.

The present invention is an ophthalmological diagnostic system adapted for use in urgent care facilities, physicians' offices, hospitals, mobile treatment facilities, and in remote areas. The ophthalmological diagnostic system includes a component for securely holding a digital camera in optical communication with an ophthalmoscope and in various embodiments may include hardware and software for analysis and storage of images or video captured using the ophthalmological diagnostic system. The ophthalmological diagnostic system facilitates viewing of images and video by a single diagnostician or multiple diagnosticians.

The invention relates to a system and method for a line scan confocal ophthalmoscope. The system comprises a linear light beam generation module, a splitting module, a scanning module, an imaging module and an output module. A linear light beam is subject to one-dimensional space scanning by the line scan confocal ophthalmoscope to illuminate fundus oculi retina, simultaneously a linear detector is used for image non-scan light beams reflected from the fundus oculi retina, the system only uses one scanning galvanometer and one linear detector, and the number of active members is small; and simultaneously, a confocal slit is conjugated with the plane of the fundus oculi retina, thereby eliminating the influence of eliminate stray light of a non-retina plane on imaging quality and obtaining high resolution by using the confocal imaging principle. The invention has the advantages of simple structure, short light path, good stability and high imaging frame frequency, is easy for manufacture and suitable for adjustment, and is small and exquisite.

An ophthalmoscope includes an illumination assembly having a light source disposed along an illumination axis and an imaging assembly configured for delivering an image to an imaging device. Each of the imaging and illumination assemblies are disposed in an instrument housing, the ophthalmoscope being configured for attachment to an electronic imaging device and in which the imaging assembly produces a field of view of about 40 degrees to permit more comprehensive eye examinations to be reliably conducted. In at least one version, a portable electronic device, such as a smart device, can be coupled to the instrument or configured to wirelessly receive images therefrom.

The invention relates to a line-scanning confocal ophthalmoscope system based on laser diffraction and a method. The system comprises a linear beam generation module, a beam-splitting module, a scanning module, an imaging module and an output module. The invention is characterized in that: the intensity of the linear beam generated by the line-scanning confocal ophthalmoscope system is uniformly distributed in a non-Gaussian form, a scanning galvanometer is adopted to scan the linear beam in a one-dimensional space to illuminate an ocular fundus retina, meanwhile, a linear detector is used for imaging the non-scanning linear beam reflected by the ocular fundus retina, and since the system only uses one scanning galvanometer and one linear detector, the number of the moving parts is less; meanwhile, a confocal slit is conjugated with the ocular fundus retina plane, consequently, the affection of the stay light of the non-retina plane on the imaging quality is eliminated, and thereby the high resolution of the confocal imaging principle. The system has the advantages of good linear beam quality, simple system structure, easy manufacturing, short light path, easy adjustment, small size, applicability, high stability and high imaging frame frequency.

An opthalmoscope for examining a patient's eye includes an illumination device for generating an illumination beam Illumination imaging optics image the illumination beam onto the eye, and a scanning device scans the illumination beam over the eye. The opthalmoscope also includes an observation device and observation imaging optics for imaging an observation beam generated by reflection of the illumination beam from the eye onto the observation device. An electronic shutter excludes stray light from the observation beam. The observation device comprises an electronic sensor with an array of photosensitive pixels that can respectively be activated and/or read out in rows, and the scanning device includes an electronic drive circuit for reading out at least one pixel row of the sensor.

The invention provides a diabetic retinopathy grade classification method based on deep learning. The diabetic retinopathy grade classification method comprises the steps of: constructing a sample library; removing backgrounds and noise of ophthalmoscope photographs in the sample library; normalizing the images of different brightness and different intensity to the same range by adopting a local mean value subtracting method; adopting random stretching and rotating methods for different samples for data augmentation, and constructing a training set and a test set; training an initial deep learning network model by establishing an input portion architecture, a multi-branch feature transformation portion architecture and an output portion architecture separately; and inputting samples to betested into the trained initial deep learning network model for diabetic retinopathy grade classification. Compared with the traditional processing method, the diabetic retinopathy grade classification method gets rid of the dependence on prior knowledge, and has good generalization ability; and by adopting the designed multiple grades, a small-sized convolution kernel can be used for extracting very tiny lesion features, thereby making the classification results more reliable.

An ophthalmologic apparatus and a method for the contactless observation, examination, treatment, and/or diagnosis of an eye. The apparatus is structurally based on a fundus camera or an ophthalmoscope. An illumination beam path extends from a first illumination source to the eye and is fitted with a perforated mirror and imaging optics, and an observation beam path extends from the eye to a detector via the imaging optics and through the perforated mirror. The arrangement additionally comprises a beam path for scanning illumination which extends from a second illumination source to the eye and is fitted with a scanning unit, a lens, and a beam splitter in addition to the imaging optics. The scanning unit that is arranged in the beam path for scanning illumination is designed as (an) electrostatically or/and galvanometrically driven bidirectional or unidirectional tilting mirror(s).

The invention relates to a novel measurement method and the device thereof, which combines the time-resolved self-fluorescence lifetime imaging technology and a laser scanning confocal ophthalmoscopeand realizes the early diagnosis of the ocular fundus diseases by obtaining and analyzing the self-fluorescence intensity and the service life information of the ocular fundus. The light which is emitted by a pulse laser is sent to the scanning head of the laser scanning confocal ophthalmoscope to excite the ocular fundus inner-source flgorgen, and the fluorescence which is emitted from the ocularfundus is collected by a time-correlated single photon counter or a high-repetition-rate synchronous scanning camera, so as to realize the service life measurement and the imaging of the self-fluorescence. As the service life of the self-fluorescence of the ocular fundus is very sensitive to the micro-environment and the cell metabolism state of flgorgen molecule and is not affected by the difference of the intensity of the flgorgen of the ocular fundus, the measurement of the fluorescence service life provides a brand new route for the detection of ocular fundus diseases and the obtainment of the function information of ocular fundus. The invention can become the solution and the basis of the early diagnosis of various ocular fundus diseases, which plays an important role in pathogeny research, clinical diagnosis, staging and typing, prognosis judgement, real-time observation and the analysis of the development of ocular fundus diseases, therefore the invention can be widely appliedin the field of medical research and clinical medical diagnosis.

A system, method, medium, controller, or ophthalmoscope for imaging a fundus of a subject. Estimating a first illumination center position for an illumination beam relative to a center position of a pupil of the subject. The first illumination center position may be offset from the center position of the pupil. Sending instructions to an ophthalmoscope to shift a center position of the illumination beam to the first illumination center position.

The invention provides a laser scanning confocal ophthalmoscope device based on two wave-front correctors. The laser scanning confocal ophthalmoscope device is a non-contact type retinal imaging system and mainly comprises a light source collimation system, a beam shrinking and expanding system, a wave-front detection and correction system, a photomultiplier tube, a two-dimensional scanning galvanometer, a synchronous circuit and a data collecting computer. In an optical system, a wave-front sensor detects eye aberration, two wave-front correctors correct the eye aberration obtained through detection while collecting real-time images of retinas. Compared with a laser scanning confocal ophthalmoscope device based on one wave-front corrector, the laser scanning confocal ophthalmoscope device based on two wave-front correctors is good in correction quality of wave-front aberration and large in correction range of the wave-front aberration.

The present invention is directed to an optical device for the observation and documentation of the ocular fundus and is preferably provided for fundus cameras. In order to generate a uniform illumination of the fundus by transillumination of the sclera in the illumination unit, according to the invention, for fundus cameras and/or ophthalmoscopes, the light emitted by the illumination source is coupled into individual light-conducting fibers or bundles of light-conducting fibers which extend into the area of the front lens of the fundus camera and ophthalmoscope and whose fiber ends are formed in such a way that the exiting light is projected on and transilluminates the sclera. The discomfort caused to the patient by pupil-dilating means is avoided as are the risks associated with the placement of contact lenses. Another substantial advantage of the illumination unit according to the invention is the extremely uniform, large-area illumination of the fundus, so that a correspondingly large visual field of the fundus can be observed and also documented.

An ophthalmoscope having a laser device for laser irradiation of an eye, in particular for performing a photocoagulation on fundus of the eye of the eye, includes an illuminator for illuminating the eye as well as a camera for acquiring an image of the eye. The illuminator is adapted to generate visible and infrared lights. The ophthalmoscope further includes a control unit adapted to trigger the illuminator for generating a light pulse of visible light and to read out from the camera a control image of the eye acquired by the camera during the light pulse. The ophthalmoscope is configurable to acquire an image of an eye and perform a laser treatment of an eye.

A confocal color opthalmoscope having a line-shaped, incoherent light source. The light emitted from the linear light source is focused and scanned to illuminate a region of a retina of an eye with a line oriented perpendicular to the direction of scan. Light reflected from the retina of eye is collected, descanned and focused onto a line shaped detector. A dispersive element may be used to illuminate a multi-slit plate with different spectral components. The retina may then be scanned with multiple slits, each having a different spectral makeup. Light reflected from the retina may be descanned and imaged back to a multiple linear array photo-detector. One of said slits may be illuminated with infra-red radiation, and the others with visible light. A filter may allow only the infra-red light to reach the retina during an initial alignment mode, allowing non-mydriatic alignment of the opthalmoscope.