Abstract: The multi-scale scanning imaging system (200) of the retina comprises according to an example a lighting and detection module (210) configured for emitting a lighting beam and for detecting a beam reemitted by the retina, a first scanning module (231) of the lighting beam and the reemitted beam, a first optical path, referred to as a “wide field” path, and a second optical path, referred to as a “small field” path, for focusing the lighting beam on the retina and for receiving the beam reemitted by the retina. The “wide field” path comprises a first optical system (205, 201) configured to conjugate a plane located near a plane of rotation of the scanning module and the plane (17) of the entrance pupil of the eye (10).

Abstract: A method may include controlling alignment of the eye in an ophthalmological imaging device that includes an imaging system with a given optical axis. The method may include the formation, on a two-dimensional detection plane, of an image of an element located in a plane of the pupil of the eye. The method further includes the determination of a lateral position of the pupil of the eye with respect to a point of origin of a reference frame of the imaging system, on the basis of the position of the image. The method further includes the analysis of a state of focus of the image. The method further includes the determination of an axial position of the pupil of the eye with respect to the point of origin of the reference frame of the imaging system, on the basis of the analysis of the state of focus.

Abstract: The present description may include a retinal-imaging device, comprising a first module for acquiring tomographic images, with a first illumination and detection sub-module and a first scanning sub-module for scanning in two directions, said first module being configured to acquire a plurality of cross-sectional images of the retina; the device further comprises a second module for acquiring surface images of the retina, with a second illumination and detection sub-module, said second module being configured to acquire surface images of the retina; the device further comprises a control unit configured to determine an angular velocity of the movements of the retina in at least one of the two directions; and to determine, before the start of acquisition of each cross-sectional image of said plurality of cross-sectional images of the retina, a scanning velocity to be applied by said first scanning sub-module in said at least one direction.

Abstract: The multi-scale scanning imaging system (200) of the retina comprises according to an example a lighting and detection module (210) configured for emitting a lighting beam and for detecting a beam reemitted by the retina, a first scanning module (231) of the lighting beam and the reemitted beam, a first optical path, referred to as a “wide field” path, and a second optical path, referred to as a “small field” path, for focusing the lighting beam on the retina and for receiving the beam reemitted by the retina. The “wide field” path comprises a first optical system (205, 201) configured to conjugate a plane located near a plane of rotation of the scanning module and the plane (17) of the entrance pupil of the eye (10).

Abstract: The invention relates to a high-resolution retinal imaging method and device notably comprising an emission source (LSr) for emitting a light beam for the illumination of the retina of an eye (10) of a subject, a detection device (12) capable of detecting spatial-frequency structures of 250 cycles/mm measured in the plane of the retina, an optical imaging system (16) allowing for the formation of an image of at least a part of the retina on the detection device (12), a device (15) for measuring optical defects with an analysis plane of the optical defects, a correction device (14) comprising a correction plane and intended to correct, in said correction plane, the light rays from said emission source (LSr) and backscattered by the retina as a function of the optical defects measured by the measurement device (15).

Abstract: The invention relates, according to one aspect, to a retinal imaging device including at least one source (LSa, LSr) for emitting a light beam in order to illuminate the retina of an eye (10) of a subject, a retinal imaging path including a detection device (12) having a detection plane (121) and an optical imaging system (L1, L5, L6), an analysis path including a device (15) for measuring optical defects having an analysis plane (151) for receiving a set of light rays backscattered by the retina and optical means for adjoining said analysis plane and a predetermined plane in the input space of said imaging system of the imaging path, a correction device (14) shared by said analysis and imaging paths, which includes a correction plane (141) and which is intended to correct, in said correction plane, the light rays from said emission source and backscattered by the retina according to the optical defects measured by the device for measuring optical defects.

Abstract: The invention relates, according to one aspect, to a retinal imaging device including at least one source (LSa, LSr) for emitting a light beam in order to illuminate the retina of an eye (10) of a subject, a retinal imaging path including a detection device (12) having a detection plane (121) and an optical imaging system (L1, L5, L6), an analysis path including a device (15) for measuring optical defects having an analysis plane (151) for receiving a set of light rays backscattered by the retina and optical means for adjoining said analysis plane and a predetermined plane in the input space of said imaging system of the imaging path, a correction device (14) shared by said analysis and imaging paths, which includes a correction plane (141) and which is intended to correct, in said correction plane, the light rays from said emission source and backscattered by the retina according to the optical defects measured by the device for measuring optical defects.

Abstract: The invention relates to a high-resolution retinal imaging method and device notably comprising an emission source (LSr) for emitting a light beam for the illumination of the retina of an eye (10) of a subject, a detection device (12) capable of detecting spatial-frequency structures of 250 cycles/mm measured in the plane of the retina, an optical imaging system (16) allowing for the formation of an image of at least a part of the retina on the detection device (12), a device (15) for measuring optical defects with an analysis plane of the optical defects, a correction device (14) comprising a correction plane and intended to correct, in said correction plane, the light rays from said emission source (LSr) and backscattered by the retina as a function of the optical defects measured by the measurement device (15).

Abstract: A method for correcting aberrations of the eye applied to an ophthalmic instrument operating with an analysis light beam, including: measurement of aberrations of the eye capable of interfering with the analysis beam, correction of the phase of the wave front of the analysis beam as a function of the measured values of the aberrations, measurement of eye movements carried out independently of the measurement of aberrations, and modification of the correction of the phase of the wave front of the analysis beam as a function of the measurement of eye movements.

Abstract: A phase modulation device implemented in an ophthalmic instrument using a main light beam interacting with an eye, the device including: an apparatus for modulating the phase of the wave front of the main light beam, a controller for controlling the phase modulation apparatus following a modulation instruction, and an analyzer for analyzing the thus-performed modulation of the phase of the wave front of the main light beam, further including emitting a secondary light beam, an apparatus for directing the secondary light beam along an optical path to the modulation apparatus, then to the analyzer, and in that the optical path does not pass through the eye, and in that the controller and the analyzer receiving the modulated secondary light beam cooperate, during a stage called a learning stage, to supply data regarding the response of the phase modulation apparatus to a set of predetermined modulation instructions.

Abstract: A method for measuring, in a given plane, the scattering of an optical system, including: the illumination of the system by a point source emitting a light flux to be transmitted by the system, and including a direct flux component and a flux component scattered by the system; the interception of part of the transmitted flux by a sampler positioned in a plane, the intercepted flux including the direct flux component and a narrow angle of the scattered flux component; the measurement of the intercepted flux by an analyser including an array of microlenses and first image detector, each microlens forming the image of the sampler on the first image detector, the dimensions of the sampler being defined such that the images of the sampler formed by adjacent microlenses present an overlap zone smaller than the projection zone of a microlens on the image detector.

Abstract: Device for measuring aberrations in an eye includes, an illumination path with an illumination diaphragm and a test path, imaging member and elements for positioning the eye in relation to the imaging member, a stray reflection filter element, which is centered on the measurement axis of the imaging member, and elements for the optical conjugation of the pupil of the eye with the plane of the illumination diaphragm and the test plane. The illumination beam path converges at the center of the filtration element. The filtration element, the illumination path, the test path and the conjugation elements are all interdependent and positioned on a platform that can move in relation to the imaging member along the axis. The illumination diaphragm is off-center in relation to the axis such that stray light flux reflected by the imaging member is deflected from the test path by filtration element.