Abstract: A method for activating a drive unit of a deflection unit of a two-dimensional microscanner device. First and second control signals for activating the drive unit of the deflection unit are initially generated using a processing unit. The first and second control signals are subsequently transferred to the drive unit. A sinusoidal first movement of the deflection unit about a first axis and a sinusoidal second movement of the deflection unit about a second axis are carried out at a first point in time based on the transferred control signals. The first control signals are then adapted so that a periodic third movement is superimposed on the first movement at a second point in time following the first point in time. Alternatively, the second control signals are adapted so that a periodic fourth movement is superimposed on the second movement at the second point in time following the first.

Abstract: Disclosed is a method and a device for in situ process monitoring and control down to a single pulse measurement during laser processing, like ablation, laser printing additive manufacturing and modification of refractive index. The disclosure relates to laser material processing and to an integrated process monitoring using interference effects of a laser beam or laser pulse.

Abstract: A scanner provided with a plurality of elementary scanners, especially two elementary scanners, referred to as a first and second scanner respectively. In particular, the first scanner and the second scanner are arranged to scan, each with an optical beam, respectively, a first surface and a second surface included in the first surface and of a smaller extent than the latter.

Abstract: An optical scanning device includes a light source, a photodetector, an optical element group, and a polygon mirror. The light source is configured to emit laser light. The photodetector is configured to detect a beam formed with the laser light. The optical element group is configured to guide the beam to the photodetector. The polygon mirror is configured to perform deflection scanning on the beam, which deflects the beam from a first end in one direction of a main scanning direction to a second end on a side opposite to the first end of the main scanning direction. The beam is incident on the same side of the photodetector when the beam is deflected toward the first end and the second end by the polygon mirror.

Abstract: Described herein is a fibre positioning system (100) for positioning a tip (102) of an optical fibre (104). The system (100) includes a piezoelectric tube scanner (106) disposed along an optical axis (107). The piezoelectric tube scanner (106) has a first end (114) fixedly mounted with respect to a mounting structure (116), a hollow interior (118) for receiving the length of the optical fibre (104) and a second end (120) being freely able to bend in a lateral direction perpendicular to the optical axis (107) in response to one or more first actuation signals from a controller (122). A glass end cap (124) is fixedly mounted at the second end (120) of the piezoelectric tube scanner (106) and optically spliced to the tip (102) of the optical fibre (104) such that bending of the piezoelectric tube scanner (106) results in lateral movement of the tip (102) of the optical fibre (104) with respect to the optical axis (107).

Abstract: A lens assembly for display includes a display, a lens assembly, and a prism assembly. The display emits a first light beam. The lens assembly includes a first, second, and third lenses. The prism assembly includes a first, second prisms, and an optical multilayer film, wherein the first prism includes a first, second, and third surfaces and the second prism includes a fourth, fifth, sixth, seventh, and eighth surfaces. The lens assembly for display satisfies at least one of following conditions: 0.60?Din/TTL?0.75; 0.28?Din/f123?0.35; 4.56 mm?Din?5.02 mm; wherein Din is an effective optical diameter of the light incident surface, TTL is an interval from the light incident surface to the light emitting surface along the optical axis, and f123 is an effective focal length of a combination of the first lens, the second lens, and the third lens.

Abstract: A light deflecting device includes a first optical element, a vibration applying part at an incident end portion of the first optical element and vibrating an emissive end portion of the first optical element along a first direction, and a second optical element moving along a second direction different from the first direction with a speed lower than a speed of the first optical element.

Abstract: A method for determining a contour of a frame groove in a rim of a spectacle frame includes illuminating the rim, capturing a plurality of images of the illuminated rim from different predetermined perspectives, evaluating the captured images, and determining a spatial curve of the frame groove based on the evaluated images. The rim is illuminated along the entire circumference of the rim by directed illumination. Moreover, the evaluation of the captured images includes assigning each portion contained in the captured images to a respective surface element of the frame groove on the basis of at least one of the following properties: shadowing of the respective portion, brightness of the respective portion and phase angle of the illumination of the respective portion. Moreover, an apparatus, a computer program, a method for grinding a spectacle lens, and a computer-implemented method for determining a geometry of a spectacle lens are disclosed.

Abstract: Systems and methods of the present disclosure provide a compact camera device that utilizes one or more spatially varying polarizers, such as one or more multi-twist retarders, to provide compact designs with improved performance. The spatially varying polarizers may be used to multiplex light received by a camera, which allows optics to modify (e.g., focus) incident light in a polarization specific manner to provide better resolution, reduced form factor, or other advantages.

Abstract: A laser processing apparatus includes a laser source which generates a laser beam; a scanner unit disposed in an optical path of the laser beam from the laser source and which adjusts the optical path of the laser beam from the laser source in a first direction or in a second direction different from the first direction; and a reflector unit disposed in an optical path of the laser beam adjusted by the scanner unit and which reflects the laser beam adjusted by the scanner unit, where the reflector unit includes a first sub-reflector unit which shifts an optical path of the laser adjusted by the scanner unit in the first direction, and a second sub-reflector unit which shifts an optical path of the laser beam adjusted by the scanner unit in a third direction opposite to the first direction.

Abstract: A hybrid solid-state lidar and a scanning method thereof. The hybrid solid-state lidar includes a rotating polygon mirror, reflecting mirrors, a wedge prism, and laser emitting and receiving systems. The laser emitting and receiving systems have projections distributed on a same circumference on a horizontal plane and are arranged under the wedge prism in a way that the circumference is circumferentially equally divided by the projections, to allow the wedge prism to refract detection laser emitted by the laser emitting and receiving systems to form one-dimensional scanning light; and the reflecting mirror is disposed above the wedge prism at a position corresponding to the laser emitting and receiving system, and the rotating polygon mirror is disposed at a center axis position above the wedge prism, whereby the reflecting mirror reflects the one-dimensional scanning light to the rotating polygon mirror which reflects the one-dimensional scanning light to form two-dimensional scanning light.

Abstract: A method for determining a contour of a frame groove in a rim of a spectacle frame includes illuminating the rim, capturing a plurality of images of the illuminated rim from different predetermined perspectives, evaluating the captured images, and determining a spatial curve of the frame groove based on the evaluated images. The rim is illuminated along the entire circumference of the rim by directed illumination. Moreover, the evaluation of the captured images includes assigning each portion contained in the captured images to a respective surface element of the frame groove on the basis of at least one of the following properties: shadowing of the respective portion, brightness of the respective portion and phase angle of the illumination of the respective portion. Moreover, an apparatus, a computer program, a method for grinding a spectacle lens, and a computer-implemented method for determining a geometry of a spectacle lens are disclosed.

Abstract: An illumination device includes a light source, a pair of wedge prisms, and a driving portion. The pair of wedge prisms deflect incident light. The driving portion includes a gear and a gear, and causes the pair of wedge prisms to rotate about a rotation axis by using the gear and the gear. The pair of wedge prisms include a wedge prism held by a barrel and a wedge prism held by a barrel. The barrel is disposed inside the barrel. A gear whose center axis is the rotation axis is provided on an outer periphery of the barrel. A gear whose center axis is the rotation axis is provided on an inner periphery of the barrel. The gear is disposed on an outer peripheral side of the gear and meshes with the gear. The gear is disposed on an inner peripheral side of the gear and meshes with the gear.

Abstract: Disclosed is a configuration to control automatic return of an aerial vehicle. The configuration stores a return location in a storage device of the aerial vehicle. The return location may correspond to a location where the aerial vehicle is to return. One or more sensors of the aerial vehicle are monitored during flight for detection of a predefined condition. When a predetermined condition is met a return path program may be loaded for execution to provide a return flight path for the aerial vehicle to automatically navigate to the return location.

Abstract: A laser irradiation method includes a first scanning wherein a laser beam is scanned in a first region having a width in the X direction and a length in the Y direction by moving a laser irradiation area on the surface of the substrate along the Y direction using a spot laser beam, and a second scanning wherein laser beam is scanned in a second region having a width in the X direction and a length in the Y direction by moving a laser irradiation area on the surface of the substrate along the Y direction using the spot laser beam. A center of the second region is spaced apart from a center of the first region in the X direction.

Abstract: An inspection system having a light source, a mirror sensor, and an image sensor. The mirror assembly is aligned with the camera; the light is reflected from the container to the camera, and the camera creates multiple images of the container at a viewing angle. The multiple images are analyzed to detect defects.

Abstract: A helicopter search light includes a movable light head comprising: at least one light source and at least one optical element, which are configured for emitting a search light beam; at least two radiation sensors arranged in a preset distance (d) from each other. The radiation sensors are configured for detecting electromagnetic radiation and providing corresponding sensor signals. The system also includes an image processing module configured for receiving the sensor signals provided by the at least two radiation sensors and generating enhanced image data from said sensor signals and a controller configured for controlling movement of the movable light head depending on said enhanced image data.

Abstract: A light detection and ranging transmitter includes an optical scanner assembly and an extending arm for positioning a light source and a light beam collimator in a coaxial configuration. The optical scanner assembly include a scanner board for installing an optical scanner, a mechanical mount, a first set of adjustable connectors coupling the scanner board to the mechanical mount, and a first set of elastic members between the mechanical mount and the scanner board and sleeved on the first set of adjustable connectors. The LiDAR transmitter includes a second set of adjustable connectors coupling the mechanical mount to the extending arm such that the optical scanner can receive a light beam emitted by the light source and collimated by the light beam collimator. The LiDAR transmitter includes a second set of elastic members between the mechanical mount and the extending arm and sleeved on the second set of adjustable connectors.

Abstract: A sensor system can comprise a detector with a plurality of units, wherein the detector is configured to generate a first set of electrical signals based on received photon energy of a light beam that is reflected back from a first plurality of points on one or more objects, in a first configuration. Additionally, the detector is configured to generate a second set of electrical signals based on received photon energy of a light beam that is reflected back from a second plurality of points on one or more objects in a second configuration, wherein the first configuration and the second configuration are with a predetermined correlation. Furthermore, the detector can determine distance to each of the first plurality of points and the second plurality of points on the one or more objects based on the first set of electrical signals and the second set of electrical signals.

Abstract: An angle-of-view testing method for a projection display device, including setting a reference viewpoint at a same side as a reflective surface associated with the projection display device, setting a metrical marker plate with a metrical marker at another side opposite to the reflective surface at a first distance from the reference viewpoint, projecting a testing picture onto the reflective surface by the projection display device, where light of the testing picture is reflected by the reflective surface toward the reference viewpoint, such that a projected image as a virtual image of the testing picture is observed at the reference viewpoint as being projected onto the metrical marker plate, determining the coverage of the projected image with respect to the metrical marker of the metrical marker plate, and determining an angle of view of the projection display device based on the determined coverage.

Abstract: A display device for projecting light to a viewer may include (1) a plurality of subpixels, in which subpixels may emit light of differing spectral distributions, (2) at least one light deviator disposed optically downstream from the plurality of subpixels, and (3) and a controller. The light emitted from each of the plurality of subpixels may be transmitted through and laterally shifted by the least one light deviator towards a viewer and the at least one light deviator may be mechanically rotatable by a force applied to an outer circumferential region of the at least one light deviator. The controller may control illumination of at least a subset of the plurality of subpixels in synchronization with rotation of the at least one light deviator. Various other apparatus, systems, and methods are also disclosed.

Abstract: A device for inspecting containers which have an opening includes a transport device which transports the objects along a configured transport path. The device includes a monitoring device which is configured to monitor at least one region of an inner wall of the container through the opening. The monitoring device is configured to capture spatially resolved images, and has a lighting device configured to illuminate at least one region of the inner wall, is arranged between the monitoring device and the container.

Abstract: A lens assembly for display includes a display, a lens assembly, and a prism assembly. The display emits a first light beam. The prism assembly includes a first, second prisms, and an optical multilayer film, wherein the first prism includes a first, second, and third surfaces; the second prism includes a fourth, fifth, sixth, seventh, and eighth surfaces; and the optical multilayer film is disposed between the third and fifth surfaces. A second light beam enters the first prism through the first surface and exits by the second surface. The first light beam exits the lens assembly and enters the second prism through the eighth surface, and exits the first prism by the second surface. The lens assembly and the prism assembly satisfy: 0.80%?E1/E0?0.95%; wherein E0 is an energy of the first light beam emitted from the display and E1 is an energy of the first light beam passes through the lens assembly.

Abstract: A system includes: a light source; first and second gratings; and at least one reflective component that in a first position forms a first light path originating at the light source and extending to the first grating and thereafter to a subsequent component in the system, and that in a second position forms a second light path originating at the light source and extending to the second grating and thereafter to the subsequent component.

Abstract: In the image processing device, the image processing method, the program, and the recording medium according to an embodiment of the present invention, a processor connected to a memory, the processor configured to receive an input of an image set owned by a user, analyze each image included in the image set, determine a plurality of tag information of an imaging content in the image set based on an analyzing result of each image, set one or more objectives to be achieved by the user based on the plurality of tag information, and set one or more items to be executed by the user for each of the one or more objectives based on the analyzing result of each image, and perform control such that at least one of the one or more objectives or the one or more items is displayed on a display.

Abstract: In some embodiments, a stereoscopic imaging apparatus includes a tubular housing having a bore extending longitudinally through the housing. First and second image sensors are disposed proximate a distal end of the bore, each including a light sensitive elements on a face and mounted facing laterally outward. The apparatus further includes a first beam steering element associated with the first image sensor and a second beam steering element associated with the second image sensor. The beam steering elements receive light from first and second perspective viewpoints and direct the received light onto the faces of the image sensors forming first and second images. Either the first and second beam steering elements or the first and second image sensors are moveable to cause a change a spacing between or an orientation of the perspective viewpoints to cause sufficient disparity between the first and second images to provide image data including three-dimensional information.

Abstract: Some embodiments may include a method assessing whether a dynamic focus module in a three axis galvanometric scanning system (three-axis GSS) is associated with a focus calibration error. The method may include identifying a reference layer associated with a surface of the work piece and positive and negative offset distances each a difference distance above or below the reference layer, respectively, and selecting a target pattern based on the offset distances, wherein the pattern includes an individual line for each offset distance. The method may include commanding the three-axis GSS to draw the target pattern on the work piece, and then assessing whether the dynamic focus module is associated with the focus calibration error by correlating laser marking artifacts on the work piece to ones of the individual lines of the selected pattern. Other embodiments may be disclosed and/or claimed.

Abstract: A laser scanning unit includes a light source portion, a scanning portion, a first correction portion, and a second correction portion. The light source portion outputs a plurality of light beams. The scanning portion scans the plurality of light beams to form a plurality of electrostatic latent images, respectively corresponding to a plurality of colors including at least one reference color and at least one non-reference color, in an image forming portion. The first correction portion applies an external mechanical force to an optical element located in a path of a reference beam, corresponding to the reference color, among the plurality of light beams to correct distortion of a scan line of the reference beam. The second correction portion controls the light source portion to correct distortion of a scan line of a non-reference beam, corresponding to the non-reference color, among the plurality of light beams.

Abstract: A method of fabricating a composite integrated optical device includes providing a substrate comprising a silicon layer, forming a waveguide in the silicon layer, and forming a layer comprising a metal material coupled to the silicon layer. The method also includes providing an optical detector, forming a metal-assisted bond between the metal material and a first portion of the optical detector, forming a direct semiconductor-semiconductor bond between the waveguide, and a second portion of the optical detector.

Abstract: An apparatus includes a detector, a light source configured to emit light, a reflecting apparatus having multiple reflective facets, and a mirror. The reflecting apparatus is configured to rotate around an axis and arranged to reflect the emitted light from the light source and reflect backscattered light. The mirror is arranged to reflect the backscattered light from the reflecting apparatus towards the detector.

Abstract: Various arrangements and methods are disclosed for forming one or more perforations on a substrate surface using a laser system, at least one rotating polygon mirror, and at least one other movable mirror. A rotating polygon mirror may be used to define a plurality of perforations in a row set or band on a substrate surface by incrementing (e.g., moving) a first mirror between a plurality of fixed (e.g., pointing) positions. A rotating polygon mirror may be used to define a plurality of perforations in a row set or band on a substrate using a first mirror that is maintained in a fixed (e.g., pointing) position. A first rotating polygon mirror and a second rotating polygon mirror may be used to define a plurality of perforations in a row set or band on a substrate surface, where the first and second polygon mirrors are used to define an extent of a given perforation in two dimensions on the substrate.

Abstract: A scanner arrangement, suitable for use in laser scanning microscopes, for scanning a scanning field (42) by means of optical radiation (5). It is equipped with at least one scanner (1), which comprises a scanning mirror (2) that is tiltable about one or two scanning axes (3, 4) and means for rotating the scanning field, for scanning a size-variable scanning field and for centring the scanning field centre (43) when panning. The arrangement includes a mechanical pivot device (7) for rotating the scanning field (42). The pivot device is arranged to pivot the scanner (1) about a pivot axis (8). Pivoting is implemented through angular dimensions that correspond to an intended rotation of the scanning field.

Abstract: Embodiments of the disclosure provide a micromachined mirror assembly having a mirror-base layer, a first reflective layer on a top surface of the mirror-base layer, and a second reflective layer on a bottom surface of the mirror-base layer. In an example, the first reflective layer is reflective to incident light of the micromachined mirror assembly, and the first reflective layer and the second reflective layer are made of a same material and have same dimensions.

Abstract: A method of forming one or more structures by additive manufacturing comprises introducing a first layer of a powder mixture comprising graphite and a fuel on a surface of a substrate. The first layer is at least partially compacted and then exposed to laser radiation to form a first layer of material comprising the fuel dispersed within a graphite matrix material. At least a second layer of the powder mixture is provided over the first layer of material and exposed to laser radiation to form inter-granular bonds between the second layer and the first layer. Related structures and methods of forming one or more structures are also disclosed.

Abstract: A laser 3D printing method with orthopedic function, comprising the following steps: step one, measuring a projection characteristic of each spot within a scanning plane, to obtain a deformation quantity of a focused light spot at the each spot within the scanning plane before rectifying; step two, setting compensation quantities of the each spot within the scanning plane of a light spot orthopedic device according to the measuring result of the step one, so that the size of the focused light spot at the each spot within the scanning plane is consistent; step three, turning on the laser, and dynamically matching the light spot orthopedic device and a scanning device to perform the laser 3D printing. The laser 3D printing method and system thereof with orthopedic function could ensure the size of the focused light spot is consistent within the scanning plane, thereby ensuring the quality of 3D printing.

Abstract: A direct retinal projector system that provides dynamic focusing for virtual reality (VR) and/or augmented reality (AR) is described. A direct retinal projector system scans images, pixel by pixel, directly onto the subject's retinas. This allows individual pixels to be optically affected dynamically as the images are scanned to the subject's retinas. Dynamic focusing components and techniques are described that may be used in a direct retinal projector system to dynamically and correctly focus each pixel in VR images as the images are being scanned to a subject's eyes. This allows objects, surfaces, etc. that are intended to appear at different distances in a scene to be projected to the subject's eyes at the correct depths.

Abstract: Embodiments of the disclosure provide a Light Detection and Ranging system. The system may include a light source configured to emit a light beam, a first apparatus configured to adjust the light beam and a second apparatus configured to adjust the light beam and receive the reflected light beam from a first rotatable mirror. The first apparatus may include the first rotatable mirror configured to receive and reflect the light beam, and a first actuator configured to rotate the first rotatable mirror. The second apparatus may include a second adjustable mirror configured to receive and propagate the light beam, a second actuator configured to adjust the second adjustable mirror, and a detector configured to receive the light beam reflected by the object. The first rotatable mirror is further configured to receive and reflect the light beam reflected by the object to the detector.

Abstract: Various embodiments described herein provide multi-projector (i.e., two or more) imaging apparatuses utilizing integrated illumination-aimer optics. Embodiments of the present disclosure minimize irreparable component offset to improve overall accuracy associated with the functioning of the apparatuses. Additionally, the integrated illumination-aimer optics enables embodiments disclosed herein to be provided in a significantly smaller form factor than conventional multi-projector imaging apparatuses.

Abstract: An optical array includes a plurality of optical elements arrayed in a longitudinal direction of the optical array, each of the optical elements comprises a convex portion, a part of which is surrounded by a first groove, and a pair of flange sections between which the optical elements are arrayed. A second groove that communicates with the first groove of each optical element is formed on at least one of the flange sections.

Abstract: A system includes: a light source; first and second gratings; and at least one reflective component that in a first position forms a first light path originating at the light source and extending to the first grating and thereafter to a subsequent component in the system, and that in a second position forms a second light path originating at the light source and extending to the second grating and thereafter to the subsequent component.

Abstract: An optical cavity includes: a first elliptical mirror, having a first focal axis A1, and designed to reflect a light beam emitted by a light source; a second elliptical mirror, having a second focal axis A2; a third elliptical mirror, having a third focal axis A3, the light beam exiting from the third elliptical mirror being designed to be received by a detector; a first reflector, arranged to reflect the light beam exiting from first elliptical mirror in the direction of the second elliptical mirror, and arranged to reflect the light beam exiting from second elliptical mirror in the direction of the third elliptical mirror; the first, second and third elliptical mirrors being arranged so that A1, A2 and A3 have a point of intersection F, corresponding to a focus common to the first, second and third elliptical mirrors.

Abstract: An adaptive beam scanning headlamp for a vehicle includes a plurality of light sources arranged linearly, with each of the plurality of light sources having a linear array of LEDs. A plurality of primary projection lenses shape light from the plurality of light sources. An oscillating mirror obliquely angled between the plurality of primary projection lenses and a secondary projection lens receives light from the plurality of primary projection lenses and redirects the light to the secondary projection lens. The secondary projection lens is adapted to further shape the light for projecting a beam pattern from the vehicle. A controller is adapted for controlling each of the plurality of light sources and the oscillating mirror to actively dim or turn off portions of the beam pattern for reducing glare perceived outside the vehicle.

Abstract: A scanning assembly for scanning at least one object appearing in a field of view includes a circuit board, a shock assembly adjacent to the circuit board, a scanning module defining a scanning axis defined along a first side of the module, a shielding assembly at least partially surrounding the scanning module, and a frame assembly including at least one opening to accommodate at least a portion of the shielding assembly. The scanning module is operably coupled to the shock assembly such that the shock assembly is disposed between the scanning module and the circuit board. The frame restricts movement of the scanning module and the shielding assembly. The scanning module and the shock assembly are movable in a direction parallel to the scanning axis, and the shock assembly is adapted to dampen a force exerted by the scanning module on the circuit board.

Abstract: A vehicular vision system includes a camera disposed at a vehicle having a field of view at least forward, rearward and/or exterior of the equipped vehicle. An image projection device is disposed in the vehicle and includes a biaxial microelectromechanical scanner and at least one light source operable to emit light. Light emitted by the at least one light source, when operated, is projected by the biaxial microelectromechanical scanner towards a windshield of the vehicle so as to form video images that are viewable by a driver of the vehicle viewing the windshield when driving the vehicle. The video images viewed by the driver viewing the windshield include video images derived from image data captured by the camera.

Abstract: Methods for manufacturing MEMS structures are provided. The method for manufacturing a microelectromechanical system (MEMS) structure includes etching a MEMS substrate to form a first trench and a second trench and etching the MEMS substrate through the first trench and the second trench to form a first through hole and an extended second trench. The method for manufacturing a MEMS structure further includes etching the MEMS substrate through the extended second trench to form a second through hole. In addition, a height of the first trench is greater than ¾ of a height of the MEMS substrate, and a height of the second trench is smaller than ? of the height of the MEMS substrate.

Abstract: A backlight unit includes a light source; a condensing unit that condenses light emitted from the light source; and a diverging unit that diverges the light entering from the condensing unit and that emits the light toward an image display unit of a light transmission type in a head-up display device. For example, the diverging unit is a lens in which both surfaces of an incident surface into which the light from the condensing unit enters as well as an emission surface from which the light is emitted toward the image display unit, are concave surfaces.

Abstract: Disclosed are a microaspiration-based lung window apparatus for obtaining a microscopic image of in vivo lung tissue and a method for using the window apparatus to obtain cell-level and molecular level microscopic images of in vivo lung tissue while maintaining physiological respiration and circulation of an animal without interference. In one embodiment, a lung window apparatus comprises an open window having the upper and lower parts open, a cover glass placed over the upper part and lung tissue coming in contact with the lower part; an aspiration tube extending from one side of the open window to an aspiration apparatus enabling the inside of the open window to be in a vacuum state; and a tilting mount placing unit extending from one side of the open window having a tilting mount to enable the cover glass and an object lens of a confocal microscope system to stay parallel to each other.

Abstract: An image forming apparatus includes a light scanning device, a light detection unit, and a positional-deviation-amount calculation unit. The light detection unit includes a slit-shaped first light detection region and a slit-shaped second light detection region arranged to have mutually different angles with respect to a scanning direction of the light beam, and outputs a detection signal when the light beam passes through each of the light detection regions. The positional-deviation-amount calculation unit calculates a time period until when the light beam passes through the second light detection region from when the light beam has passed through the first light detection region for each scan of the light beam based on the detection signal output from the light detection unit, and calculates a variation characteristic of a positional deviation amount in a sub-scanning direction of the light beam associated with rotation of the polygon mirror.

Abstract: A mirror for an ophthalmic laser treatment device that is movable on an axis from a position in a treatment laser beam path to a position out of the treatment laser beam path. The mirror reflects light from a light source into the eye of a patient. The mirror is biased towards a position in the path and is moved out of the path by an actuator just long enough for the laser treatment to be applied and without noticeable interruption to viewing by a user.

Abstract: Mirror control circuitry described herein is for controlling a first micro-mirror of a micro-mirror apparatus that scans across a target area in a scan pattern. The mirror control circuitry includes a processor that determines a mechanical angle of the first micro-mirror for a given instant in time during scanning of the first micro-mirror between upper and lower rotational limits, the mechanical angle being such to maintain the scan pattern as being uniform while the micro-mirror apparatus scans across the target area between the upper and lower rotational limits. The processor also generates a driving signal for the first micro-mirror as a function of the determined mechanical angle for the first micro-mirror at the given instant in time.