Abstract: A lens tube includes a standard member, a lens, a guide, and a pushing member. The standard member has a standard surface via which the standard member is to be mounted to a camera main body. The lens retainer retains at least one lens and is connected to the standard member movably along an optical axis of the at least one lens. The guide is provided facing the lens retainer in a radial direction of the at least one lens to guide the lens retainer along the optical axis. The pushing member pushes the lens retainer and the guide in opposite directions.

Abstract: The present invention relates in particular to the field of lasers and in particular to a laser source having a neodymium-doped crystal (2; 23) or fiber and pumpable by pumping means (3; 25) and a non-linear Raman effect converter stimulated in methane (4; 32), characterized in that the crystal (2; 23) or fiber pumped by said pumping means (3; 25) is able to emit a laser radiation at a wavelength between 1.31 and 1.36 ?m and in that the Raman converter (4; 32) is able to convert the radiation generated by the crystal (2; 23) or by the fiber into at least one second radiation (7; 36) with a wavelength between 2 and 2.3 ?m.

Abstract: An intraocular lens selection apparatus and an intraocular lens selection method for selecting an intraocular lens to be implanted into an examinee's eye. The apparatus has an input unit which inputs corneal wavefront aberration of the eye, a memory which stores wavefront aberrations of a plurality of intraocular lens models, an unit which sets, as a target value, desired post-operative residual wavefront aberration of the eye after the lens is implanted, an unit which calculates, as an estimated value, post-operative residual wavefront aberration of the eye to be obtained when each lens model is implanted, based on the inputted corneal wavefront aberration and the stored wavefront aberration of each lens model, and specifies one of the lens models which renders the estimated value close to the set target value, a monitor, and a display control unit which controls the monitor to display information of the specified lens model.

Abstract: A medical laser device is described that generates a laser beam controllable with presets as to pulse duration, pulse repetition rate, power and energy per pulse. The device also provides presets with respect to water and air outputs. Parametric values for power, pulse duration, pulse repetition rate, and energy per pulse as well as for water and air settings may be programmed by an end user and stored as presets.

Abstract: The present invention is related to a system for obtaining a fundus image, constituted by optical means implemented in an equipment to observe and photograph the image of the wall fundus (16), comprising a capturing optical means composed by high sensibility digital camera, constituted by an image sensor (2) and focal optical system (3), said digital camera being used to register a captured image by an afocal optical system, composed by a capturing lens (13) and its afocal complement (6); a lighting optical means provided from a arrangement conformed with optical fiber bundle (7), (8), (9) and (10), halogen light source (23) or light emitting diode source (LED); wherein said light beam from the halogen light (23) or light emitting diodes has an annular form when it pass in the anterior part of eyeball (14) and focus in the pupil plan (15); both the means having the optical path partially common over the optical axle (1) from the optical fibers arrangement (7), (8), (9) and (10) to the fundus (16), region in t

Abstract: It is intended to carry out a focusing operation suitably in each case of automatic focusing and manual focus adjustment. Therefore, in the present invention, there is provided a first focus ring 1 movable between a first position and a second position on an optical axis. Further, a first rotation-angle detection unit detecting a rotation amount of the first focus ring 1 at the first position, a second focus ring 2 coupled to the first focus ring 1 when the first focus ring 1 is at the first position, and a second rotation-angle detection unit detecting a rotation amount of the second focus ring 2 are provided. When the first focus ring 1 is at the first position, a focus lens is driven based on the rotation amount detected by the first rotation-angle detection unit, and when the first focus ring 1 is at the second position, the focus lens is driven based on the rotation amount detected by the second rotation-angle detection unit.

Abstract: Provided is a lens driving module including a housing that has a lens barrel housing portion provided therein; a lens barrel that has a bearing contact portion and a guide portion formed on the outer circumferential surface thereof and is mounted in the lens barrel housing portion of the housing; a piezoelectric motor that is mounted in one outer corner of the housing, which corresponds to the guide portion of the lens barrel, among the outer corners of the housing, and provides a driving force to the lens barrel; and a power connection member that is bent so as to cover the piezoelectric motor and the outer circumferential surface of the housing and is coupled to the housing.

Abstract: A method for controlling wavelengths of a multi-path laser is provided. The method includes: obtaining a difference between an actual output wavelength and a target output wavelength of each laser (S601); obtaining a corrected control amount of a temperature controller of each laser by decoupling calculation according to the difference (S602); and determining a die temperature of each laser according to the corrected control amount of the temperature controller (S603). A system for controlling wavelengths of a multi-path laser includes a multi-path laser (10), a difference module (12), a decoupling module (14), and a temperature control module (16).

Abstract: The light beam generator 1 is provided with a laser light source 10, an optical phase modulation element 15 and others. The optical phase modulation element 15 receives coherent light output from the laser light source 10 and passed through a beam splitter 14 to modulate a phase of the light depending on a position on the beam cross section of the light, and outputs the light after the phase modulation to the beam splitter 14.

Abstract: Generally, the present invention relates to medical devices and a method of vision screening, and more particularly to a pediatric vision screening system and method thereof that identifies a risk factor for amblyopia or diagnoses amblyopia by measurement of microstrabismus. An embodiment of the invention is directed to a method of patient screening for risk factors for amblyopia which includes the steps of illuminating the eye with polarized light, scanning the polarized light about the eye, capturing the retro-reflected light emanating back from the eye, analyzing the retro-reflected light to determine ocular misalignment; and calculating a metric to determine if the patient passes or fails the screening test thereby providing an indication that the patient may have a risk of amblyopia based on either strabismus or anisometropia. The method is effective at detecting amblyopia related to focusing problems without the measuring the focus of the eye directly.

Abstract: A collapsible lens barrel having a low-profile size and a camera applied with the collapsible lens barrel. The lens barrel includes a first retractable lens-retaining frame and a second retractable lens-retaining frame for retaining at least one of a plurality of lens groups and being retracted to a position outer than an inner radius of a movable lens cone in the collapsed state, respectively; and a first retractable lens-moving member and a second retractable lens-moving member. At least one of the first and second retractable lens-retaining frames is retained movable relative to the respective retractable lens-moving member along an optical axis direction in the collapsed state.

Abstract: A laser device that includes a dual pulse-width laser-pumping circuit generates long and short laser pulses. The laser-pumping circuit employs a single power supply with dual high voltage outputs that are selectable under control of a user. The laser device conveniently generates long and short laser pulses or a mix of the two for performing specialized surgical procedures.

Abstract: An optical device is provided. The optical device including an optical member having a first main surface and a second main surface, which respectively serve as an entrance surface and an exit surface for light from a directional light source, and made of a material having a refractive index greater than 1; and a support member at least including swing means for the optical member, wherein the first and second main surfaces of the optical member swingable by the support member are able to be inclined with respect to an optical path of the light from the directional light source.

Abstract: A lens activating device includes at least one elastic piece, at least one stationary piece and a movable piece. At least one elastic piece has at least four sheet portions and four sets of elastic portions. Each set of the elastic portions are serpentine and connected between two sheet portions in order to make the at least one elastic piece form a closed ring. The stationary piece is connected to two sheet portions, and the movable portion is connected to the other two sheet portions. The elastic force generated by the four sets of elastic portions exerts a restoring force on the movable piece. Via this arrangement, the slight rotation of the movable piece within the lens activating device can be reduced. Further, the problem that the elastic piece may scrape the neighboring elements can be prevented.

Abstract: The present invention provides an ophthalmic lens comprised of two lens materials with a gap between them of less than about 5 mm. The gap is formed and maintained by particles on the perimeter of the surfaces of both lens materials. Methods are also provided for creating a gap between two lens materials and for producing an ophthalmic lens with a gap between two lens materials.

Abstract: An optical element is moved in six-degrees-of-freedom. Three first displacement sensors are disposed on a base plate and measure respective displacement amounts of three mutually different points on the optical element in a first direction. A second displacement sensor measures a displacement amount of one point on the optical element in a second direction. Two third displacement sensors measure respective displacement amounts of two mutually different points on the optical element in a third direction. A transformation processor transforms the six measured displacement amounts. A calibration processor calibrates the transformed displacement amounts with a calibration matrix of which coefficients are previously obtained to calibrate the displacement amounts in the six-degrees-of-freedom, which have errors due to measurement errors of the displacement sensors. A controller outputs command values based on differences between the calibrated displacement amounts and target displacement amounts.

Abstract: An optical element unit is provided comprising an optical element group for projecting light along an optical axis of the optical element group and a housing having an inner housing part partly defining a first space and a light passageway between the inner housing part and a second space. The inner housing part receives the optical element group. The optical element group comprises an ultimate optical element located in the region of the light passageway. A load-relieving device is provided adjacent to the ultimate optical element, the load relieving device partly defining the first space and the second space and at least partly relieving the ultimate optical element from loads resulting from pressure differences between the first space.

Abstract: A support structure for a light quantity control unit of a lens barrel includes a holding frame which holds a light quantity control member; front and rear support members positioned in front and behind the holding frame, respectively; a front guide pin and a front pin support hole formed on one and the other of the holding frame and the front support member, the front guide pin being slidably inserted into the front pin support hole; and a rear guide pin and a rear pin support hole formed on one and the other of the holding frame and the rear support member, the rear guide pin being slidably inserted into the rear pin support hole. The holding frame is supported by the front and rear guide pins and the front and rear pin support holes to be movable between the front and rear support members.

Abstract: Described herein is a method for optimization of the conditions of execution of the vision contrast test and the corresponding system with which to implement said method so as to be able to guarantee optimal conditions throughout the test session even when not it is not possible to respect the standards. Furthermore, the method comprises a self-calibration procedure, which definitively eliminates the operations of calibration of the system by specialized centers.

Abstract: An optical modulator comprising a spacing-controllable etalon having at least one sprung micro-mirror suspended above a substrate. At least one electrically insulating stop is provided between the micro-mirror and the substrate to avoid short-circuit when the micro-mirror is drawn towards the substrate by an applied voltage. An optical detector detects the time of arrival of a first laser pulse. A control circuit predicts from this an arrival time of the next incident laser pulse and, responsive to a control signal, either retains the micro-mirror in its pulled-down state held against the insulating stops or releases the micro-mirror at a time predicted to maximise or minimise the light transmitted through the modulator. After a time interval calculated to permit a predetermined number of mechanical oscillations, the micro-mirror is pulled back down onto the stops.