Abstract: An illumination module includes a light emitting unit, an optical lens with positive refractive power, and a concave mirror. At least one of an object-side surface and an image-side surface of the optical lens is an asymmetrical surface, and the light emitting unit is provided at an object side of the optical lens. The concave mirror is provided at an image side of the optical lens, and the concave mirror acts as an optical path folding element. Light emitted by the light emitting unit passes through the optical lens and is reflected by the concave mirror to be a parallel light ray.

Abstract: A lens, wherein a first profile in a first direction intersecting an optical axis and a second profile in a second direction intersecting the optical axis are different from each other, and a length of the first profile in the first direction is different from a length of the second profile in the second direction.

Abstract: An image projector includes an illumination arrangement with a number of illumination sources and a tilt-mirror assembly, all operating under control of a controller. An optical arrangement directs illumination from the illumination sources towards the mirror and on to an image plane. A collimating arrangement collimates the illumination from the image plane to generate a collimated image directed to an exit stop. The controller (830) modulates an intensity of each of the illumination sources (808) synchronously with tilt motion of the mirror (814) according to the content of the digital image. In certain implementations, the illumination sources (808) are spaced apart. Although the tilt motion brings each illumination source to scans across only part of a dimension of the field of view, all of the illumination sources together scans across the entirety of the one dimension.

Abstract: Systems and methods are described that relate to a scanning laser system configured to emit laser light and an interlock circuit communicatively coupled to the scanning laser system. The interlock circuit may carry out certain operations. The operations include, as the scanning laser system emits laser light into one or more regions of an environment around the scanning laser system, determining a respective predicted dosage amount for each region based on the emitted laser light. The operations further include detecting an interlock condition. The interlock condition includes a predicted dosage amount for at least one region being greater than a threshold dose. In response to detecting the interlock condition, the operations include controlling the scanning laser system to reduce a subsequent dosage amount in the at least one region.

Abstract: An optical element driving mechanism includes a fixed portion, a movable portion, a driving assembly, and a circuit assembly. The movable portion is connected to the optical element and is movable relative to the fixed portion. The driving assembly drives the movable portion to move relative to the fixed portion. The circuit assembly is connected to the driving assembly. The driving assembly is electrically connected to an external circuit via the circuit assembly.

Abstract: An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly, a driving assembly and a circuit assembly. The movable assembly is configured to connect an optical element, the movable assembly is movable relative to the fixed assembly, and the optical element has an optical axis. The driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The circuit assembly includes a plurality of circuits and is affixed to the fixed assembly.

Abstract: A method for designing an optical system for providing reliable, robust and successful realization of a distortion variation function is presented. In a preferred embodiment, the proposed distortion variation optical system includes at least two non-symmetrical elements, which are moving in the transverse direction. The proposed freeform lens contains two transmissive refractive surfaces. The freeform elements designed with this method have preferably a flat surface and a non-symmetrical freeform surface. The two plano-surfaces are preferably made to face each other, so that a miniature camera can be offered. The value of the non-symmetrical freeform surface is used to produce variable optical power when the two freeform elements undergo a relative movement in the vertical direction. Using this method, an optical system with an active distortion, smaller form factor, and better imaging quality can be obtained.

Abstract: The disclosed subject matter relates to a method of projecting an image by means of a light source emitting light pulses and an oscillating micro-electro-mechanical system (MEMS) mirror deflecting the emitted light pulses, comprising: providing a matrix of durations for each pixel, and incrementing or decrementing a pixel index whenever a respective duration indexed by the respective pixel indices in the playout matrix has lapsed; for each light pulse: retrieving the respective intensity and durations indexed by the current pixel indices, calculating an interval from at least one of said durations, emitting said light pulse with said retrieved intensity, and waiting said calculated interval before emitting the next light pulse. The disclosed subject matter further relates to a projector carrying out said method.

Abstract: A test fixture (10) for HUD windshields (12) wherein aspherical devices (26) compensate for complex curvatures and optical aberrations in a heads-up display surface (16) of the windshield. Tunable lenses cooperate with a movable test matrix to improve image resolution and enhance ghost image reduction.

Abstract: A method and system are disclosed for using circular symmetry to eliminate the angle limitations of an optical axis in a scanned aperture holography system. A Room-sized Holography System may be a scanned aperture holographic video display and may comprise a rotating platform, a telescope comprising a first lens and a second lens, and scanners at the Fourier plane where the focal length of the first lens and the second lens meet. The platform may rotate around an axis aligned with a spatial light modulator. When the platform rotates, the scanners rotate, thereby de-rotating a SAW image. The second lens may be a spherical reflective surface for redirecting light from the spatial light modulator, having passed through the first lens and reflected off a mirror-scanner, toward a user's eyes. The user may be on a chair above the spatial light modulator, wherein the chair is configured to rotate with the spatial light modulator.

Abstract: Provided is a light source device including a plurality of light emitting points arranged in matrix within a first cross section parallel to a first direction and a second direction. When light emitting points are projected within a second cross section parallel to first direction and a third direction perpendicular to first cross section, light emitting points have equal intervals between projections adjacent to each other. When light emitting points are projected within a third cross section parallel to second and third directions, light emitting points have equal intervals between projections adjacent to each other. An interval between light emitting points adjacent to each other in a row of matrix, an interval between light emitting points adjacent to each other in a column of matrix, an angle between row and column, an angle between column and first direction, and an angle between row and second direction are appropriately set.

Abstract: The disclosure relates to a method for setting and visualizing parameters of an objective lens of a camera, in particular for focusing on a moving object, and to a system for per-forming the method. The camera is, for example, embodied as a film camera, in particular as a film camera used in cinematography. The method includes the following steps: calcu-lating a relative position and an alignment of a depth of field of the objective lens in the 3D space, observing the 3D space and/or the object with an AR display and observation de-vice, displaying the relative position and the alignment of the depth of field of the objective lens as an image in the AR display and observation device and/or displaying a focal plane as an image in the AR display and observation device, and setting the objective lens to ob-tain a desired depth of field of the objective lens.

Abstract: A near-eye display assembly presented herein includes an electronic display, an optical assembly, and scanning assembly. The electronic display has a first resolution. The optical assembly controls a field of view at an eye box and directs a plurality of light rays emitting from the electronic display toward the eye box. The scanning assembly shifts a direction of at least one of the light rays in accordance with emission instructions such that a virtual display is presented to the eye box, the virtual display having a second resolution greater than the first resolution. The display assembly can be implemented as a component of a head-mounted display of an artificial reality system.

Abstract: A three-dimensional (3D) object printer includes a surface treatment system configured to treat layers of an object being formed by the printer with a moving ultraviolet (UV) laser. The movement of the laser is controlled with a scanning mirror system and the spot size of the laser is reduced with a focus lens having a numerical aperture in a range of about 0.5 to about 1.0.

Abstract: An image display device includes a lens array, and a scanner to two-dimensionally scan the lens array with a light beam for image display, in which each of lenses of the lens array includes a convex surface with different curvatures in two directions orthogonal to the optical axis of the lens and to each other.

Abstract: A display device includes a light source unit, a light deflector configured to deflect light from the light source unit, an optical element array configured to be two-dimensionally scanned in a main-scanning direction and in a sub-scanning direction with light via the light deflector 15, the optical element array having a plurality of optical elements, and a light projecting unit configured to project light received via the optical element array. In the display device, each of a beam spot diameter in the sub-scanning direction on the optical element array and an arrangement pitch of the optical elements in the sub-scanning direction on the optical element array is equal to or greater than a scanning line pitch on the optical element array.

Abstract: An optical scanning device of an electrophotographic printer is provided. The optical scanning device includes an optical source portion to emit an optical beam inclined in a sub-scanning direction with respect to a reference plane, an optical deflector to deflect and scan the optical beam in a main scanning direction, and an imaging lens to image the deflected optical beam onto a light-exposed object and having an optical axis which is parallel to the reference plane. In order to correct a scanning line curvature, a location of a vertex of a curved surface of the imaging lens in the sub-scanning direction is varied based on a location in the main scanning direction.

Abstract: The disclosure provides a collimating lens. In order from a laser transmitter side to a to-be-measured object side, the collimating lens includes a first lens, a second lens, a third lens, a fourth lens and an aperture stop. The aperture stop is on the to-be-measured object side, and optical centers of each lens being on a same line. The collimating lens satisfying the following conditions: (dn/dt)1<?50×10?6/° C., (dn/dt)2<?50×10?6/° C., (dn/dt)3<?50×10?6/° C., (dn/dt)4>?10×10?6/° C. A refractive index of each lens is usually distributed reasonably with temperature, the focal length can be stabilized and applied to different temperature occasion. Under the same size laser emitter, the focal length of the system is larger, and the field of view angle is smaller.

Abstract: A speckle reduction device includes: a beam-shaping lens to shape at least one laser beam emitted from at least one light source, and to transmit the shaped laser beam to a panel; and a vibration unit to vibrate the beam-shaping lens in directions of two or more vibration axes such that a direction of the laser beam to be transmitted to the panel is changed to forms a plurality of different patterns.

Abstract: Light Sheet Theta (LS-?) Microscopy achieves large sample imaging capabilities without affecting the imaging depth or the image quality. An optical layout places a detection objective normal to the sample surface, while placing the illumination objectives that generate light sheets at an angle (theta) significantly smaller than 90 degrees. In this configuration, the light sheets enter from same side of the sample as the detection objective. The intersection of the light-sheet and the detection focal plane results in a line illumination-detection profile that is discriminated by a camera.

Abstract: A display device includes a light source, a first optical system, a first mirror, a changing element, and a second optical system. The light source emits a light beam. The first optical system converts the light beam emitted from the light source into a collimated light beam. The first mirror reflects the light beam coming through the first optical system while rotating around a first axis. The changing element changes a traveling direction of the light beam reflected by the first mirror. The second optical system deflects the light beam coming through the changing element. The changing element changes the traveling direction of the light beam such that an angle of the light beam in the traveling direction which has been reflected by the first mirror is changed more greatly in a peripheral section than in a central section.

Abstract: An optical apparatus is provided. The apparatus comprises a rotatable reflecting member including a first reflecting surface and a second reflecting surface, an optical system configured to sequentially reflect, by a plurality of reflecting surfaces included therein, light reflected by the first reflecting surface and cause the light to be incident on the second reflecting surface, and an adjusting device configured to change a rotation angle of the reflecting member to adjust an optical path of light that is reflected by the second reflecting surface and exits the second reflecting surface.

Abstract: An image projection device includes: a first mirror oscillating to scan an image light beam forming an image projected onto a retina of a user; a light source emitting the image light beam and a detection light beam to the first mirror at different timings; a second mirror having a first region reflecting the image light beam reflected by the first mirror to the retina and a second region reflecting the detection light beam reflected by the first mirror in a direction different from a direction in which the image light beam is reflected, and scanning neither the image light beam nor the detection light beam reflected by the first mirror; a detector detecting the detection light beam reflected by the second region; and a controller adjusting oscillation of the first mirror and an emission timing of the image light beam based on a detection result by the detector.

Abstract: An LED lamp light distribution system and illumination system, the illumination system comprises an LED lamp light distribution system, and at least one illuminated surface. The LED lamp light distribution system comprises an LED chip, a lens, and a light reflecting device. The lens comprises a lens optical axis, a light source setting groove, and an exit surface. The light source setting groove comprises a first contour line, and the exit surface comprises a first exit surface contour line. The first contour line and the first exit surface contour line complete the convergence of the emergent light of the LED chip toward the lens optical axis. The light source setting groove comprises a second contour line, the exit surface comprises a second exit surface contour line, and the second contour line and the second exit surface contour line complete the diffusion of the emergent light of the LED chip away from the lens optical axis.

Abstract: A method of delivering a beam of laser-radiation to a workpiece for processing the workpiece comprises transmitting the beam twice through an inactive acousto-optic modulator (AOM) crystal in opposite zero-order directions of the AOM at separate locations on the AOM crystal, before delivering the beam to the workpiece. When laser-radiation is to be blocked from reaching the workpiece, the AOM is activated.

Abstract: A projector comprises an arc lamp (110) with a parabolic reflector (111) in front of this a double concave lens (114) and then a pair of convex concave lenses (170, 172) to enable the projector to emit a highly collimated beam.

Abstract: The present disclosure describes Augmented Reality (AR) methods and systems allowing one or more user to observe a virtual image (e.g., computer generated image) overlaid on a physical scene (e.g., actual real life surroundings). Embodiments herein allow components of the AR methods and systems to be decoupled from each other, such that a user is able to view a virtual image overlaid on a physical scene while simply wearing thin, lightweight holographic spectacles.

Abstract: The present invention relates to an illumination apparatus (100) comprising a light engine (3) and a first lampshade (1) for accommodating the light engine (3), wherein the first lampshade (1) has a first expansion coefficient, wherein the illumination apparatus (100) further comprises a second lampshade (2) for accommodating the first lampshade (1), wherein the second lampshade (2) has a second expansion coefficient smaller than the first expansion coefficient, and is configured such that the changes in size or shape of the first lampshade (1) can be restrained under a high temperature.

Abstract: The present disclosure relates to optical systems, specifically light detection and ranging (LIDAR) systems. An example optical system includes a laser light source operable to emit laser light along a first axis and a mirror element with a plurality of reflective surfaces. The mirror element is configured to rotate about a second axis. The plurality of reflective surfaces is disposed about the second axis. The mirror element and the laser light source are coupled to a base structure, which is configured to rotate about a third axis. While the rotational angle of the mirror element is within an angular range, the emitted laser light interacts with both a first reflective surface and a second reflective surface of the plurality of reflective surfaces and is reflected into the environment by the first and second reflective surfaces.

Abstract: There is a demand for an inexpensive optical scanning apparatus. An optical scanning apparatus includes a light source configured to emit a laser light flux, a deflection unit configured to deflect the laser light flux emitted from the light source, and a light reception member configured in such a manner that the laser light flux reflected by the deflection unit is incident thereon. The light source emits the laser light flux tilted by a predetermined angle with respect to a horizontal direction toward the deflection unit. The light reception member is disposed above or below the light source, and the laser light flux reflected by the deflection unit and tilted by the predetermined angle with respect to the horizontal direction is incident on the light reception member.

Abstract: The invention is directed at an exposure head for use in an exposure apparatus for illuminating a surface, the exposure head comprising one or more radiative sources for providing one or more beams, an optical scanning unit arranged for receiving the one or more beams and for directing the beams towards the surface for impinging each of the beams on an impingement spot, a rotation actuating unit connected to the optical scanning unit for at least partially rotating the optical scanning unit, wherein the impingement spots of the one or more beams are scanned across the surface by said at least partial rotation of the optical scanning unit, wherein the optical scanning unit comprises a transmissive element including one or more facets for receiving the one or more beams and for outputting the beams after conveying thereof through the transmissive element, for displacing the beams upon said rotation of the transmissive element for enabling the scanning of the impingement spots.

Abstract: The embodiments described herein provide scanning laser devices that include an output optic configured to reduce image distortion. Specifically, the output optic is configured to reduce the distortions that could otherwise occur at relatively short projection distances, while also providing good image quality at relatively long projection distances. In general, the output optic includes a prism having a first surface, a second surface, and a third surface. The prism is configured such that the laser light interacts with each of these three surfaces while being transmitted through the prism and outputted to the display surface. The first, second, and third surfaces are each formed to have a freeform rotationally asymmetric shape, and these freeform rotationally asymmetric shapes are configured to work together to correct distortion in projected images.

Abstract: Disclosed herein a light projection device and a head lamp for vehicle capable of highly increasing and decreasing the illuminance of a plurality of specific regions in a light distribution designed in advance with high degree of freedom. The light projection device includes: a first optical system that forms a second light radiation region; a dynamic light deflection unit configured to deflect a light beam involved in forming the second light radiation region; a second optical system configured to project the deflected light beam to form a third light radiation region; and a deflection pattern generation unit configured to deflect and output each ray of the light beam such that a direction of deflection to be imparted is dependent on a position at which each ray is incident on the light incident portion.

Abstract: Optical coherence tomography systems for imaging a whole eye are provided including a sample arm including focal optics that are configured to rapidly switch between at least two scanning modes in less than about 1.0 second.

Abstract: A retinal display projection device comprising a micro-projection component (2) arranged for projecting an image directly onto the retina of a user wearing the device, characterized in that said micro-projection component is arranged for projecting an image outside of the normal field of view of said user.

Abstract: The image display device (100) provides images perceivable from the area of the eye box (E), and includes a light source unit (110), a screen (140), a scanning unit (130) and an optical system (155). The screen (140) has a single micro lens array (1) on which multiple micro lenses (3) are arranged. The scanning unit (130) includes a mirror (130a) to reflect beams emitted from the light source unit (110), and swings the mirror (130a) around a pivot center (130c) to scan the beams thereover, thereby generating images. The optical system (155) brings the images formed on the screen (140) to the eye box (E). An angle (?out) formed between a zero-order diffracted beam and a first-order diffracted beam, which are among a luminous flux of beams diffracted by the screen (140) and pass through the center of the eye box (E), is smaller than a minimum visual angle (Vmin).

Abstract: An optical scanning device includes a light source that emits light, a deflector that deflects and scans the light emitted from the light source in a main scanning direction, a housing, a synchronization detection sensor, and a sensor board. The synchronization detection sensor is mounted in the housing, detects scanning light from the deflector, and outputs a write timing reference signal of image data. The sensor board is mounted with the synchronization detection sensor. The aforementioned sensor board is formed with a light transmitting hole for allowing a part of the scanning light to pass therethrough when an incident position of the scanning light for a light receiving surface coincides with a center position of the aforementioned light receiving surface in a sub-scanning direction on an extension line of a center line of the light receiving surface of the aforementioned synchronization detection sensor in the sub-scanning direction.

Abstract: A lighting apparatus for film, television, video capture, motion picture and photography which includes a Fresnel lens fixed in a housing which contains a tight array of high power LEDs. The LED panel or board is mated to a heat dissipating apparatus to provide active cooling and together forming an LED engine. The LED engine is mounted to a slider allowing the LED engine to be adjusted within the housing with respect to the lens. Light shaping diffusion may be included on the housing. A power supply unit may also be included in the housing. When in electrical communication, the LED engine and power supply unit function as an integrated self-contained lighting apparatus. Optionally, the power supply may have an integrated dimmer switch, and may be capable of receiving PFC power or have an integrated battery unit.

Abstract: A Z-axis focusing mechanism having a scanner and a prism whose front and rear faces are not normal to the direction of travel of a light beam prior to the light beam impinging upon the front face of the scanner. The scanner and the prism are oriented with respect to one another such that when a light beam is scanned onto the front face of the prism, a scanned beam having varying Z-axis focus points at distinct lateral locations exits the rear face of the scanner. Alternatively, the rear face of the prism may be normal to the light beam as it passes through the prism, which generates a retro-reflected, scanned light beam that exits the front of the prism.

Abstract: Optical coherence tomography systems for imaging a whole eye are provided including a sample arm including focal optics that are configured to rapidly switch between at least two scanning modes in less than about 1.0 second.

Abstract: A head mounted image display device includes: a frame including a front section having a nose pad; a light transmitter supported by the front section and allowing visible light to pass therethrough; an optical scanner that receives signal light modulated according to an image signal and made incident thereon and that two-dimensionally scans the incident signal light toward the light transmitter; a half mirror on a surface on which the signal light from the optical scanner is incident and having a curved surface that reflects the signal light; and a condensing lens on an optical axis between the optical scanner and the half mirror and condensing the signal light from the optical scanner between the optical scanner and the half mirror to convert the signal light reflected by the half mirror into parallel light.

Abstract: A light scanning device include a housing and an f? lens. The housing includes a bottom plate and a sidewall disposed upright at the bottom plate. The rotating polyhedron and the f? lens are each installed at the bottom plate of the housing. The rotating polyhedron is configured to deflect and scan light beam. Light beam deflected and scanned by the rotating polyhedron transmits the f? lens. The bottom plate of the housing includes a stepped portion at a part corresponding to a peripheral area of the f? lens. The stepped portion is formed lower than a top surface of the bottom plate. The stepped portion has a ridge line in a concavo-convex shape.

Abstract: A light scanning device of the invention includes a scan deflection range of each of the light fluxes deflected by the deflecting part in a scan period of the scan object with the respective light fluxes is divided into a first deflection range where a reflection angle of each of the light fluxes with respect to the deflecting part is small and a second deflection range where the reflection angle is large. A polarization direction of each of the light fluxes is set such that a reflectivity of the reflective mirror when each of the light fluxes deflected in the second deflection range is reflected becomes larger than a reflectivity of the reflective mirror when each of the light fluxes deflected in the first deflection range is reflected.

Abstract: The method includes the steps of: obtaining lateral magnification of an optical scanning system; obtaining the maximum value of thickness in the optical axis direction of an scanner lens; obtaining allowance b on one side and beam diameter a in the vertical scanning direction in the lens; and obtaining width h in the vertical scanning direction of the lens by the following expression h=a+2b. The allowance b is a product of the maximum value of thickness in the optical axis direction of the lens and a coefficient, and the coefficient is determined according to the lateral magnification of the system in such a way that the maximum value of movement of the focal point of the lens due to moisture absorption is made smaller than or equal to a predetermined value.

Abstract: A varifocal-type optical scanning probe including an optical fiber scanner and a varifocal lens is provided. The varifocal lens includes: a first membrane lens comprising a first lens surface with a variable curvature and a first pressure surface configured to induce a curvature variation of the first lens surface; a second membrane lens including a second lens surface with a variable curvature and a second pressure surface configured to induce a curvature variation of the second lens surface; a first pressure member disposed to apply a pressure to the first pressure surface; a second pressure member disposed to apply a pressure to the second pressure surface; and a motor configured to transmit a driving force to at least one of the first pressure member and the second pressure member.

Abstract: Apparatus and methods for optical scanning, including an optical probe capable of motion for optical scanning with respect to both the interior and the exterior of a scanned object, the optical probe also including light conducting apparatus disposed so as to conduct scan illumination from a source of scan illumination through the probe; light reflecting apparatus disposed so as to project scan illumination radially away from a longitudinal axis of the probe with at least some of the scan illumination projected onto the scanned object; optical line forming apparatus disposed so as to project scan illumination as a line of scan illumination with at least some of the scan illumination projected onto the scanned object; and a lens disposed so as to conduct, through the probe to an optical sensor, scan illumination reflected from the scanned object.

Abstract: An optical scanning apparatus capable of fixing an optical member using a plate spring without forming a die cut hole and thus having high dust-proof performance includes a mirror supporting portion supporting a reflection mirror, and a projecting portion configured to form a gap between the reflection mirror supported on the mirror supporting portion and itself, and to deform the plate spring with the reflection mirror, and the projecting portion is provided with a cut hole for engaging the plate spring.

Abstract: A light scanning apparatus includes a light source, a deflector configured to deflect a light flux from the light source, and an imaging optical system configured to guide the light flux deflected at the deflector onto a scanned surface. The imaging optical system consists of a single imaging optical element, wherein, on the optical axis of the imaging optical system, the conditions 0.15?T2/Sk?0.3 and 0.03?d/K?0.08 are satisfied. A condition 0.3?B?0.6 is satisfied at a condensing position Y where a scanning angle ? is greatest, when the condensing position Y in the main scanning direction on the scanned surface of the light flux deflected at the scanning angle ? by the deflector is expressed by Y=(K/B)×tan(B×?).

Abstract: An image display apparatus includes a light source unit, a scanning mirror unit that reflects and raster scans a light beam from the light source unit, a light source drive unit that drives the light source unit based on input image data, a microlens array that is arranged on an optical path between the light source unit and an eye of a user, and an optical sensor configured to detect the presence or absence of the microlens array. When the optical sensor fails to detect the presence of the microlens array, drive of the optical source is stopped.

Abstract: A light scanning apparatus, including: a light source; a deflector configured to deflect the light beam from the light source to scan a photosensitive member; an optical member configured to guide the light beam; a housing including a housing engaging portion and a supporting portion configured to support the optical member; a leaf spring including a pressing portion and a leaf spring engaging portion; and an abutment portion, wherein, in a process in which the housing engaging portion and the leaf spring engaging portion are moved from a second state in which the leaf spring engaging portion is not engaged with the housing engaging portion to a first state in which the leaf spring engaging portion is engaged with the housing engaging portion, the pressing portion is moved from the abutment portion to the optical member.