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

Abstract: A method for fluorescence microscopic imaging of an object may be performed by means of a fluorescence microscopic imaging system with light sheet illumination. The method includes generating a line of light and scanning the line of light to generate a light sheet and further includes performing a wavefront analysis on an analysis field of the object. The method further includes applying spatial filtering of the fluorescence light, where the spatial filtering includes scanning a filtering element with respect to a fluorescence image of the line of light formed in a filtering plane of the filtering element. The scanning of the filtering element may be synchronized with the scanning of the line of light such as to obtain a superposition, at each instant, of the filtering element and the fluorescence image of the line of light.

Abstract: A method for analyzing the surface quality of a substrate may include emitting a first light beam incident on a first face of said substrate, receiving a first reflected beam resulting from the reflection of the first beam by the first face and a second reflected beam resulting from a reflection by a second face of the substrate in order to generate at least a first measurement signal characteristic of a combination of the wavefronts of the first and second reflected beams, receiving a transmission beam resulting from transmission of the substrate by a second light beam in order to generate a second measurement signal, and calculating, from the first and second measurement signals, a first signal and a second signal representative of a deformation of the first face and the second face respectively.

Abstract: According to one aspect, the present description relates to a device for analysing a wavefront, configured to be connected to a fluorescence microscopy imaging system with optical sectioning, equipped with a microscope objective comprising a pupil in a pupil plane, the analysis device comprising a two-dimensional detector comprising a detection plane; a two-dimensional arrangement of microlenses, arranged in an analysis plane, each microlens being configured to form, on the detection plane, when the analysis device is connected to the microscopic imaging system, an image of an object situated in a focal plane of the microscope objective, with a given analysis field; an optical relay system configured to optically conjugate the analysis plane and the pupil plane; a field diaphragm positioned in a plane optically conjugated with the plane of detection, and configured to define said analysis field; a processing unit configured to determine, based on the set of images formed by the microlenses, a two-dimensional

Abstract: A device for analysing a wavefront may be connected to a fluorescence microscopy imaging system with optical sectioning, equipped with a microscope objective including a pupil in a pupil plane, the analysis device including a two-dimensional detector including a detection plane; a two-dimensional arrangement of microlenses, arranged in an analysis plane, each microlens forming, on the detection plane, when the analysis device is connected to the microscopic imaging system, an image of an object situated in a focal plane of the microscope objective, with a given analysis field; an optical relay system optically conjugating the analysis plane and the pupil plane; a field diaphragm positioned in a plane optically conjugated with the plane of detection, and defining said analysis field; a processing unit that determines, based on the set of images formed by the microlenses, a two-dimensional map of a characteristic parameter of the wavefront in said analysis plane.

Abstract: According to one aspect, the present description relates to a device for analysing a wavefront, configured to be connected to a fluorescence microscopy imaging system with optical sectioning, equipped with a microscope objective comprising a pupil in a pupil plane, the analysis device comprising a two-dimensional detector comprising a detection plane; a two-dimensional arrangement of microlenses, arranged in an analysis plane, each microlens being configured to form, on the detection plane, when the analysis device is connected to the microscopic imaging system, an image of an object situated in a focal plane of the microscope objective, with a given analysis field; an optical relay system configured to optically conjugate the analysis plane and the pupil plane; a field diaphragm positioned in a plane optically conjugated with the plane of detection, and configured to define said analysis field; a processing unit configured to determine, based on the set of images formed by the microlenses, a two-dimensional

Abstract: The aim of the present description is a system for generating high peak power laser pulses including a light source for emitting initial nanosecond laser pulses, a fiber-based device for conveying laser pulses, including at least one first multimode fiber with a single core, a diffractive optical element and an optical system that generates, from each of said initial laser pulses, a laser pulse, the spatial intensity distribution of which on an input face of said first multimode fiber includes a “top hat” component summed with a speckle pattern. The system further includes a spatial shaping module that transforms a first electric field into a second electric field formed by a sum of N components that are at least partially spatially incoherent with one another, N?2, such that the contrast of said speckle pattern is limited compared to an initial contrast defined without a spatial shaping module.

Abstract: The present description relates, according to one aspect, to a high-peak-power laser pulse generation system (10), comprising at least one first light source (101) for emitting first laser pulses (IL), a fiber device (110) for transporting said first laser pulses, comprising at least one first multimode fiber with a single core designed to receive said first laser pulses, and a module (102) for temporally shaping said first laser pulses, arranged upstream of the fiber device, configured so as to reduce the power spectral density of said pulses by reducing the temporal coherence.

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: A device for analysing a wavefront may be connected to a fluorescence microscopy imaging system with optical sectioning, equipped with a microscope objective including a pupil in a pupil plane, the analysis device including a two-dimensional detector including a detection plane; a two-dimensional arrangement of microlenses, arranged in an analysis plane, each microlens forming, on the detection plane, when the analysis device is connected to the microscopic imaging system, an image of an object situated in a focal plane of the microscope objective, with a given analysis field; an optical relay system optically conjugating the analysis plane and the pupil plane; a field diaphragm positioned in a plane optically conjugated with the plane of detection, and defining said analysis field; a processing unit that determines, based on the set of images formed by the microlenses, a two-dimensional map of a characteristic parameter of the wavefront in said analysis plane.

Abstract: The present description relates, according to one aspect, to a high-peak-power laser pulse generation system (10) comprising at least one first light source (101) for emitting first nanosecond laser pulses (IL), a fiber device (110) for transporting said first laser pulses, comprising at least one first multimode fiber with a single core designed to receive said first laser pulses, and at least one first optical amplifier (120) arranged at the output of said fiber device for optically amplifying said first laser pulses in order to form said high-peak-power laser pulses.

Abstract: The present description relates, according to one aspect, to a high-peak-power laser pulse generation system (10), comprising at least one first light source (101) for emitting first laser pulses (IL), a fiber device (110) for transporting said first laser pulses, comprising at least one first multimode fiber with a single core designed to receive said first laser pulses, and a module (102) for temporally shaping said first laser pulses, arranged upstream of the fiber device, configured so as to reduce the power spectral density of said pulses by reducing the temporal coherence.

Abstract: A method for evaluating the quality of the measurement of an optical wavefront, said measurement being obtained by means of a wavefront analyzer by direct measurement, the method comprising: the acquisition (10) of an optoelectronic signal for the measurement of the wavefront by means of a wavefront sensor, said sensor comprising a two-dimensional detector; the determination (11) on the basis of said optoelectronic signal of at least one parameter characteristic of a parasitic component of the optoelectronic signal; the evaluation (12) of a quality factor of the measurement of the wavefront as a function of said at least one parameter characteristic of the parasitic component of the signal; the display (13) to a user of a level of quality of the measurement as a function of said quality factor.

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 for evaluating the quality of the measurement of an optical wavefront, said measurement being obtained by means of a wavefront analyzer by direct measurement, the method comprising: the acquisition (10) of an optoelectronic signal for the measurement of the wavefront by means of a wavefront sensor, said sensor comprising a two-dimensional detector; the determination (11) on the basis of said optoelectronic signal of at least one parameter characteristic of a parasitic component of the optoelectronic signal; the evaluation (12) of a quality factor of the measurement of the wavefront as a function of said at least one parameter characteristic of the parasitic component of the signal; the display (13) to a user of a level of quality of the measurement as a function of said quality factor.

Abstract: The invention concerns, in one aspect, an actuator for generating a bidirectional force intended for being integrated into a deformable mirror comprising a deformable reflective substrate. Said actuator comprises a stationary body (10); a drive device; a drive rod (20) able to be driven in a translatory movement with respect to the stationary body (10), along an axis of translation (xx?), by means of the drive device; a floating head (30) designed to be attached to the deformable reflective substrate, and mounted in floating manner with respect to the drive rod via first and second elastic means (33, 35). The first and second elastic means (33, 35) are each mounted between the drive rod (20) and the floating head (30) and are designed to apply forces to the floating head, whose projections on the translation axis (xx?) are of opposite directions.

Abstract: According to one aspect, the invention concerns a method for microscopy of a thick sample arranged on a sample support, with edge-illumination of the sample. The method comprises, in particular, emitting at least one illumination beam (1), forming, from the illumination beam, an illumination surface, focusing the illumination surface in the sample by means of a microscope lens (120) and deflecting the illumination surface originating from the microscope lens, in order to form a transverse illumination surface, located in a plane substantially perpendicular to the optical axis of the microscope lens.

Abstract: The invention concerns, in one aspect, an actuator for generating a bidirectional force intended for being integrated into a deformable mirror comprising a deformable reflective substrate. Said actuator comprises a stationary body (10); a drive device; a drive rod (20) able to be driven in a translatory movement with respect to the stationary body (10), along an axis of translation (xx?), by means of the drive device; a floating head (30) designed to be attached to the deformable reflective substrate, and mounted in floating manner with respect to the drive rod via first and second elastic means (33, 35). The first and second elastic means (33, 35) are each mounted between the drive rod (20) and the floating head (30) and are designed to apply forces to the floating head, whose projections on the translation axis (xx?) are of opposite directions.