A medical diagnostic instrument or a plurality of disparate medical diagnostic instruments are configured with a common optical architecture that functionally creates a virtual eye to create closer proximity to a patient and therefore increase the field of view in regard to a target of interest. The optical system includes a distal optical element, at least one relay lens and an eyepiece lens in which the optical system can be integrated within at least one instrument or be provided using a releasable module. Additionally, at least one of a viewing assembly and illumination assembly of at least one medical diagnostic instrument can be assembled using a series of components that are connected by interlocking features.

A subjective optometry apparatus includes an optometry unit having an optical member, being located in front of a subject eye, and changing optical characteristics of a target light flus with using the optical member, and a measurement optical system that has a light projecting optical system for applying measurement light emitted from a measurement light source to a fundus of the subject eye through the optometry unit, and a light receiving optical system in which a detector receives reflected light of the measurement light reflected on the fundus of the subject eye through the optometry unit, and that objectively measures the optical characteristics of the subject eye. An optical axis of the measurement optical system is set to be off-axis from an optical axis of the optical member in the optometry unit.

The present disclosure relates to sensor systems for electronic ophthalmic devices. In certain embodiments, the sensor systems may comprise a selection layer configured to reject light from the eye within a first range of incident angles and allow light from the eye within a second range of incident angles to pass through the selection layer. The sensor system may comprise a plurality of photodiodes disposed below the selection layer and configured to detect the light from the eye within the second range of incident angles that is allowed to pass through the selection layer. The sensor system may comprise an output circuit electrically coupled to the plurality of photodiodes and configured to output a signal indicative of which photodiode of the plurality of photodiodes detected the light.

Methods and apparatuses for fundus imaging are presented that use sequential selective illumination patterns to suppress unwanted reflections, scattering and haze from various optical components of a fundus-viewing instrument. This is particularly the case with those unwanted reflections produced by the objective lens contained within said instrument.

A confocal laser fundus angiographic device, comprises: an objective lens, a scanning lens, a scanning galvanometer, a mirror, a filtering module, an imaging detection assembly and an excitation light source. The illumination light emitted by the excitation light source enters the fundus passing through the scanning galvanometer, the scanning lens and the objective lens. Fluorescent substances in fundus vessels are excited by the illumination light and emit light with a specific wavelength. The light with a specific wavelength enters the imaging detection assembly by passing through the objective lens, the scanning lens, the scanning galvanometer, the mirror and the filtering module. The filtering module comprises a base, a motor mounted on the base, a rotary block mounted on the motor and at least one filter mounted on the rotary block. The base is provided with a light-through hole. Compared with the prior art, the confocal laser fundus angiographic device is capable of automatically switching the filter, thereby avoiding the problem of forgetting to switch the filter due to the operator's mistake or switching the filter by mistake.

A medical diagnostic instrument or a plurality of disparate medical diagnostic instruments are configured with a common optical architecture that functionally creates a virtual eye to create closer proximity to a patient and therefore increase the field of view in regard to a target of interest. The optical system includes a distal optical element, at least one relay lens and an eyepiece lens in which the optical system can be integrated within at least one instrument or be provided using a releasable module. Additionally, at least one of a viewing assembly and illumination assembly of at least one medical diagnostic instrument can be assembled using a series of components that are connected by interlocking features.

A retinal imaging system includes an image sensor for acquiring a retinal image and a dynamic illuminator for illuminating a retina to acquire the retinal image. The dynamic illuminator includes a center baffle along with first and second illumination arrays. The center baffle extends from and surrounds an aperture through which an image path for the retinal image passes before reaching the image sensor. The first illumination array extends out from first opposing sides of the aperture along a first linear axis. The second illumination array extends out from second opposing sides of the aperture along a second linear axis that is substantially orthogonal to the first linear axis.

An imaging device may include first and second optical channels, where each of the first and second optical channels include a discrete optical imaging pathway. The first and second optical channels may be aimed at different angles relative to each other, and each may be directed towards corresponding partially overlapping zones of an object for imaging. Each of the optical channels may include an illuminating source configured to be turned on or off, where illumination from the illuminating sources follow respective illumination paths to the object. Each of the optical channels may additionally include lenses shared by both the respective optical imaging pathways and the respective illumination paths, and each may include an image sensor. The imaging device may also include a computing device configured to turn on the illuminating source of the first optical channel while capturing an image using the image sensor of the second optical channel.

An imaging system (10) includes: iris imaging means (1) for photographing an iris of a subject; first irradiation means (2a) for applying light to the subject; and second irradiation means (2b) for applying light to the subject in such a manner that an angle between an optical axis of the light emitted from the second irradiation means (2b) and an optical axis of the iris imaging means (1) is larger than an angle between an optical axis of the light emitted from the first irradiation means (2a) and the optical axis of the iris imaging means (1).

A medical ophthalmic system uses a patient-specific face mask to establish a predefined alignment between the ophthalmic system and an eye of a patient. The patient-specific face mask may optionally provide a light proof enclosure for the eye. The face mask may be coupled directly to an ophthalmic device, or its housing/enclosure, of the ophthalmic system. The face mask may be 3D printed based on a 3D model of the patient's face.