331 results about "Optical correction" patented technology

A method for treating presbyopia by performing ablative photodecomposition of the corneal surface. The offset image of a variable aperture, such as a variable width slit and variable diameter iris diaphragm, is scanned in a preselected pattern to perform ablative sculpting of predetermined portions of a corneal surface. The scanning is performed to ablate an optical zone sized to match the patient pupil with a peripheral transition zone outside the pupil. The shape of the ablated optical zone is different from the shape of the final optical correction on the anterior surface of the cornea. The optical zone corrects for near-vision centrally and far-vision peripherally. A movable image displacement mechanism enables radial displacement and angular rotation of the profiled beam exiting from the variable aperture. The method enables wide area treatment with a laser having a narrower beam than the treatment area, and can be used in the treatment of many conditions in conjunction with presbyopia such as hyperopia, hyperopic astigmatism and irregular refractive aberrations.

A purely refractive projection objective suitable for immersion micro-lithography is designed as a single-waist system with five lens groups, in the case of which a first lens group with a negative refracting power, a second lens group with a positive refracting power, a third lens group with a negative refracting power, a fourth lens group with a positive refracting power and a fifth lens group with a positive refracting power are provided. The system aperture is in the region of maximum beam diameter between the fourth and the fifth lens group. Embodiments of projection objectives according to the invention achieve a very high numerical aperture of NA>1 in conjunction with a large image field, and are distinguished by a good optical correction state and moderate overall size. Pattern widths substantially below 100 nm can be resolved when immersion fluids are used between the projection objective and substrate in the case of operating wavelengths below 200 nm.

A modular IOL system including intraocular primary and secondary components, which, when combined, form an intraocular optical correction device, wherein the secondary component is placed on the primary component within the perimeter of the capsulorhexis, thus avoiding the need to touch or otherwise manipulate the capsular bag. The secondary component may be manipulated, removed, and/or exchanged for a different secondary component for correction or modification of the optical result, on an intra-operative or post-operative basis, without the need to remove the primary component and without the need to manipulate the capsular bag. The primary component may have haptics extending therefrom for centration in the capsular bag, and the secondary component may exclude haptics, relying instead on attachment to the primary lens for stability. Such attachment may reside radially inside the perimeter of the capsulorhexis and radially outside the field of view to avoid interference with light transmission.

A method of predicting clinical performance of an ophthalmic optical correction using simulation by imaging a series of objects of different sizes by each of a plurality of eye optical systems, each of the eye optical systems including the ophthalmic optical correction, the method providing an output value representing the resolution and contrast performance of the optical design at that vergence for the eye optical systems.

A method for enhancing vision of an eye includes a laser delivery system having a laser beam for ablating corneal material from the cornea of the eye. Measurements are made to determine an optical path difference between a plane wave and a wavefront emanating from the retina of the eye for a location at a surface of the cornea. An optical correction is provided to the laser delivery system for the location based on the optical path difference and refractive indices of media through which the wavefront passes. The optical correction includes dividing the optical path difference by a difference between an index of refraction of corneal material and an index of refraction of air. The laser beam is directed to the location on the surface of the cornea and corneal material ablated at the location in response to the optical correction to cause the wavefront to approximate the shape of the plane wave at that location.

Devices, systems, and methods that facilitate optical analysis, particularly for the diagnosis and treatment of refractive errors of the eye. An optical diagnostic method for an eye includes obtaining a sequence of aberration measurements of the eye, identifying an outlier aberration measurement of the sequence of aberration measurements, and excluding the outlier aberration measurement from the sequence of aberration measurements to produce a qualified sequence of aberration measurements. The sequence of aberrations measurements can be obtained by using a wavefront sensor. An optical correction for the eye can be formulated in response to the qualified sequence of aberration measurements.

An ophthalmic lens element (100) for correcting myopia in a wearer's eye is disclosed. The lens element (100) includes a central zone (102) and a peripheral zone (104). The central zone (102) provides a first optical correction for substantially correcting myopia associated with the foveal region of the wearer's eye. The peripheral zone (104) surrounds the central zone (102) and provides a second optical correction for substantially correcting myopia or hyperopia associated with a peripheral region of the retina of the wearer's eye. A system and method for dispensing or designing an ophthalmic lens element for correcting myopia in a wearer's eye is also disclosed.

The invention provides a method and a system for correcting a distorted projector image and a projector. The method comprises the following steps of: acquiring position data of the projector relative to a triaxial space from a locating device of the triaxial space arranged on the projector after the projector is switched on; comparing the detected position data with reference position data and acquiring position offset of the projector; calculating an adjustment position and an adjustment angle of a trapezoid optical correction device of the projector according to the position offset; and regulating the trapezoid optical correction device according to results. By the method and the system for correcting the distorted projector image and the projector, the distorted image caused by the position offset of the projector can be automatically, conveniently and accurately corrected.

A catadioptric projection objective for imaging a pattern arranged in the object plane (102) of the projection objective into the image plane (104) of the projection objective has a catadioptric first objective part (105) having at least one concave mirror (106), and a dioptric second objective part (108) in which there is situated a pupil surface (111) near the image. At least one concave lens (140, 145) with a concave surface (140′, 145′) directed towards the pupil surface (111) is arranged in a near zone (160) of the pupil surface. There are no lenses with a strongly curved concave surface directed towards the image plane between the pupil surface and the image plane. Such projection objectives can be produced in a way which saves material in conjunction with good optical correction, and are relatively insensitive to production-induced deviations from the ideal design.

Image data is processed to facilitate focusing and/or optical correction. According to an example embodiment of the present invention, an imaging arrangement collects light data corresponding to light passing through a particular focal plane. The light data is collected using an approach that facilitates the determination of the direction from which various portions of the light incident upon a portion of the focal plane emanate from. Using this directional information in connection with value of the light as detected by photosensors, an image represented by the light is selectively focused and/or corrected.

When an object image is to be recorded, a blur of the object image is optically corrected. When an object image is to be displayed without being recorded, a blur of the object image is corrected not optically but by image signal processing.

Optical correction methods, devices, and systems reduce optical aberrations or inhibit refractive surgery induced aberrations. Error source control and adjustment or optimization of ablation profiles or other optical data address high order aberrations. A simulation approach identifies and characterizes system factors that can contribute to, or that can be adjusted to inhibit, optical aberrations. Modeling effects of system components facilitates adjustment of the system parameters.

The present invention discloses an ophthalmic device with micro-acoustic electromechanical elements and associated methods. In some embodiments, the micro-acoustic electromechanical elements may be useful for the purpose of providing audible warnings and/or messages to a user. The audible warnings and/or messages can include, for example, messages transmitted wirelessly through a communication element of the ophthalmic device and/or generated within the ophthalmic device. In addition, in some embodiments the ophthalmic device can be an energized contact lens that is used both for optical correction and the transmission of sound through bone resonance to the inner ear of a user.

Optical correction methods, devices, and systems reduce optical aberrations or inhibit refractive surgery induced aberrations. Error source control and adjustment or optimization of ablation profiles or other optical data address high order aberrations. A simulation approach identifies and characterizes system factors that can contribute to, or that can be adjusted to inhibit, optical aberrations. Modeling effects of system components facilitates adjustment of the system parameters.

The invention discloses a self-adaptive optical correction method based on a convolutional neural network. The method comprises the following steps of S1, based on the convolutional neural network, training a convolutional neural network model of a distorted far-field light intensity image and a wavefront corrector driving signal; and S2, after the convolutional neural network model is built, dividing a to-be-corrected distorted wavefront into two parts after reflection by a wavefront corrector and beam splitting of a light path, and performing imaging on a focus plane CCD and an out-of-focusplane CCD. The method has the beneficial effects that the wavefront corrector driving signal is obtained directly according to the input light intensity by utilizing the convolutional neural network model; the driving signal is used for controlling the wavefront corrector to generate a deformation amount which is conjugated with the to-be-corrected wavefront so as to correct an aberration of an incident wavefront; the wavefront detection and the corresponding reconstruction calculation do not need to be carried out, and the iteration optimization does not need to be carried out; and a system is simple in structure, easy to implement, low in cost and wide in bandwidth.

An image capture apparatus has an image sensor and an optical anti-shake mechanism that reduces a shake of a captured image by driving an optical correction element in a different direction from an optical axis of an imaging optical system in accordance with a detected shake. Reference coordinates for geometric deformation processing applied to the captured image are determined based on an amount and direction of a movement of the optical correction element. The geometric deformation processing is applied to the captured image using these reference coordinates and an amount of geometric deformation based on the detected shake. Coordinates of the captured image corresponding to an intersection of the optical axis and the image sensor before the optical correction element is moved through the driving are determined as the reference coordinates.

The invention discloses a three-dimensional laser alignment positioner for a particle image velocimetry and belongs to the technical field of fluid dynamic experiments. The positioner comprises a three-dimensional coordinate adjusting frame and a laser sheet optical correction system. The three-dimensional coordinate adjusting frame comprises a Z-direction coordinate frame, a Y-direction coordinate frame, an X-direction coordinate frame, a front positioning cross ruler, a rear positioning cross ruler, a rotating substrate and a base; and the laser sheet optical correction system comprises two upper and lower laser sheet optical correction boards with the same structure, a focusing ruler, a photoelectric detection board and a photoelectric indicator. By using the three-dimensional coordinate adjusting frame, the positioner can accurately determine the position of a testing plane, realizes the overlap of three surfaces of a flow field testing plane, a laser sheet light surface and a camera shooting surface through the laser sheet optical correction system, automatically detects the overlap ratio through a photoelectric detection device, and avoids human errors brought by the conventional visual inspection and other experimental calibration methods. Therefore, the calibration process of the particle image velocimetry is simpler and more standard and accurate.