Abstract: Disclosed is an electronic device including a display module and a camera module. The display module includes a first substrate and a second substrate stacked with each other, and a routing structure arranged on a surface of one side of the second substrate facing towards the first substrate, and provided with a first light-passing hole. The camera module includes a camera body and a light-shielding layer arranged on a surface of one side of the first substrate away from the second substrate and provided with a light inlet hole and a second light-passing hole. The first light-passing hole, the second light-passing hole, and the light inlet hole are arranged in an optical axis direction of the camera module. An orthographic projection of the first light-passing hole and the second light-passing hole on a surface perpendicular to the optical axis direction fall within an orthographic projection of the light inlet hole.

Abstract: A liquid-crystal display (LCD) device includes: an array substrate on which a sub-pixel is disposed; a color filter substrate on which a color filter corresponding to the sub-pixel is disposed; and a liquid-crystal layer between the array substrate and the color filter substrate. The array substrate comprises a lens hole, the color filter substrate comprises a lens hole guide, and a diameter of the lens hole is smaller than an inner diameter of the lens hole guide.

Abstract: A display device is provided. The display device includes a display panel including a substrate and a plurality of scan lines disposed on the substrate and extending in a first direction, a backlight module disposed under the display panel, and an optical film disposed above the backlight module and including a plurality of light-blocking portions and a plurality of light-transmission portions which are arranged alternately. The light blocking portions extend in a second direction, and the first direction and the second direction are not parallel.

Abstract: Disclosed are a head-up display device and a motor vehicle. The head-up display device includes an image source, a transflective device and a light control device. The image source is configured to emit light for forming an image. The transflective device is configured to reflect light that is incident on the transflective device and allow the light that is incident on the transflective device to be transmitted. The light control device includes a retroreflection element and a dispersion element arranged above the retroreflection element; the retroreflection element is configured to reflect the light that is incident on the retroreflection element in a direction opposite the incident direction of the light that is incident on the retroreflection element; and the dispersion element is configured to diffuse the light that is incident on the dispersion element.

Abstract: An accessible card can provide access to an account. The account card can include sides and a curved tactile feature. The sides can be connected to form a shape that includes a central point. The curved tactile feature can provide access to an account and can be associated with a side. The side can include a first size that is different than a second size associated with other sides, a first distance to the central point of the shape that is different than a second distance to the central point of the shape associated with the other sides, and a first arc length that is different than a second arc length associated with the other sides.

Abstract: A polarizing plate and an optical display apparatus including the same are provided. The polarizing plate includes: a polarizer; and a first retardation layer and a second retardation layer sequentially stacked on a lower surface of the polarizer. The first retardation layer has an in-plane retardation (Re) of 200 nm to 250 nm at a wavelength of 550 nm; the second retardation layer has an in-plane retardation (Re) of 80 nm to 140 nm at a wavelength of 550 nm; and the polarizing plate has a total transmittance difference of 2% or more between total transmittance at a wavelength of 450 nm and total transmittance at a wavelength of 420 nm.

Abstract: A polarizing plate and an optical display apparatus are provided. A polarizing plate includes: a polarizer; and a first retardation layer and a second retardation layer sequentially stacked on a lower surface of the polarizer, and the first retardation layer has a short wavelength dispersion of about 1 to about 1.03, a long wavelength dispersion of about 0.98 to about 1, and an in-plane retardation of about 180 nm to about 220 nm at a wavelength of 550 nm, the second retardation layer has a short wavelength dispersion of about 1 to about 1.1, a long wavelength dispersion of about 0.96 to about 1, and an in-plane retardation Re of about 70 nm to about 120 nm at a wavelength of 550 nm, and a ratio of out-of-plane retardation of the second retardation layer at a wavelength of 550 nm to thickness thereof is about ?33 nm/?m to about ?15 nm/?m.

Abstract: A head-mounted display includes an image display device including a panel unit serving as a display element configured to display an image, a colored optical member disposed on a light path of imaging light emitted from the panel unit and having a yellowness of a predetermined value or greater, and a coloring correction optical member configured to correct a degree of coloring of the imaging light of the entire light path in accordance with the yellowness of the colored optical member.

Abstract: Provided is a liquid crystal display device and a polarizing plate capable of improving the contrast ratio in the front direction. The polarizing plate includes a pair of polarizers including a first polarizer and a second polarizer whose transmission axes are parallel to each other; a retarder between the paired polarizers; and a diffusion layer in at least one of a region between the paired polarizers or a region on a side without the retarder of the first polarizer.

Abstract: Provided is a light shielding film for head-up display (HUD), the light shielding film including a plurality of light shielding materials configured to transmit a first directional light propagating from a view in front of a vehicle in a first direction and block at least a portion of a second directional light propagating from an external light source in a second direction that is opposite to a third direction in which light is output from a display panel for HUD included in the vehicle, at least one gradient of the plurality of light shielding materials corresponding to the first direction, and a transparent material that fills a space between the plurality of light shielding materials.

Abstract: Provided are an augmented reality optical module, including a first lens, a second lens, a third lens group, a first polarization modulation unit provided on a side of the third lens group and configured to modulate the light emitted by the image source into first circularly polarized light, an angle selection film provided on a first surface of one side of the first lens and configured to reflect light having an incidence angle greater than or equal to a first angle and transmit light having an incidence angle smaller than or equal to a second angle, and a second polarization modulation unit provided on the other side of the first lens and configured to modulate incident circularly polarized light into linearly polarized light.

Abstract: A heat-resistant, bio-based polycarbonate ester prepared by melt polycondensation of 1,4:3,6-dianhydrohexitol and a carbonate, 1,4-cyclohexanedicarboxylate, or a terephthalate is disclosed. The heat-resistant, bio-based polycarbonate ester includes a repeat unit 1 of Formula 1, a repeat unit 2 of Formula 2, and a repeat unit 3 of Formula 3: The polycarbonate ester has excellent heat resistance, transparency, and processability. A method of producing the polycarbonate includes a step of melt polycondensation of 1,4:3,6-dianhydrohexitol and a carbonate, 1,4-cyclohexanedicarboxylate, or a terephthalate.

Abstract: The present application relates to a circularly polarizing plate and a use thereof. The present application can provide a circularly polarizing plate, which can be applied to a display device such as an organic light emitting display device to minimize blocking of light in the visible light region affecting image quality while blocking harmful ultraviolet rays appropriately and also has excellent durability. In addition, the present application can provide a circularly polarizing plate having excellent compensation characteristics at a viewing angle while ensuring process simplification and cost competitiveness.

Abstract: Method for producing a thin optical laminated body. This method is a method for producing a laminated body including a polarization layer, a ?/2 layer, a ?/4 layer, a positive C layer, and a transfer adhesive layer, the laminated body including the polarization layer, the ?/2 layer and the ?/4 layer in this member-described order; including the positive C layer between the polarization layer and the ?/4 layer, or at the side of the ?/4 layer that is opposite to the ?/2-layer-arranged side of the ?/4 layer; and including the transfer adhesive layer between the polarization layer and the ?/4 layer or positive C layer, the method including the step of bonding a bonding body including a substrate and the transfer adhesive layer to an adherend through the transfer adhesive layer, and peeling the substrate from the resultant.

Abstract: An opto-magnetic device includes an integrated optical circuit having an input for an input optical radiation and at least one output for an output optical radiation. The optical circuit defines an area sensible to the variations of a local refraction index probed by the optical radiation, destined to come in contact with the sample. A plurality of probe molecules are included to anchor to the sensible area, and a plurality of magnetic particles are included to anchor to molecules of the analyte, bound to the probe molecules upon a molecular recognition. A magnetic actuator is configured to generate a variable magnetic field and oscillate the magnetic particles to cause variation of the refraction index probed by the optical radiation in the sensible area, and a variation of at least one characteristic parameter of the output optical radiation correlated to a concentration of the molecules of the analyte.

Abstract: A segmented birefringent chromatic beam shaping device comprises at least three birefringent chromatic segments arranged side by side in a pupil of the beam shaping device. The birefringent chromatic segments are essentially n? waveplates at a first design wavelength. At a second design wavelength, the birefringent chromatic segments are essentially (m+1/2)? waveplates. Each of the birefringent chromatic segments comprises a stack of birefringent elements including at least three chromatic birefringent elements. Orientations of fast axes of each pair of directly consecutive chromatic birefringent elements of each of the birefringent chromatic segments differ by at least 5 deg. The at least three birefringent chromatic segments comprise same sequences of materials, thicknesses and orientations of their birefringent elements so that they only differ is their orientations in the pupil.

Abstract: An optical sensing device adopted to use structured light to detect an object is provided. The optical sensing device includes a structured light projector and a sensor. The structured light projector includes a light source and at least one beam multiplication film. The light source is configured to emit a light beam. The at least one beam multiplication film is disposed on a transmission path of the light beam and is made of anisotropic refractive index material, wherein a plurality of separated light beams are produced after the light beam from the light source passes through the at least one beam multiplication film, so as to form the structured light. The sensor is configured to sense the structured light reflected from the object. Besides, a structured light projector is also provided.

Abstract: A laser surgery system includes a light source, an eye interface device, a scanning assembly, a confocal detection assembly and preferably a confocal bypass assembly. The light source generates an electromagnetic beam. The scanning assembly scans a focal point of the electromagnetic beam to different locations within the eye. An optical path propagates the electromagnetic beam from a light source to the focal point, and also propagates a portion of the electromagnetic beam reflected from the focal point location back along at least a portion of the optical path. The optical path includes an optical element associated with a confocal detection assembly that diverts a portion of the reflected electromagnetic radiation to a sensor. The sensor generates an intensity signal indicative of intensity the electromagnetic beam reflected from the focal point location. The confocal bypass assembly reversibly diverts the electromagnetic beam along a diversion optical path around the optical element.

Abstract: An optical device may comprise an array of sensor elements that includes a plurality of pixels and a multispectral filter disposed on the array of sensor elements. The multispectral filter may be configured to pass a first transmission percentage of light of a particular spectral range to a first set of pixels of the plurality of pixels and pass a second transmission percentage of light of the particular spectral range to a second set of pixels of the plurality of pixels.

Abstract: An electronic apparatus includes a first adhesive member having a first modulus, a second adhesive member having a second modulus, and a flexible member between, and contacting, the first adhesive member and the second adhesive member, wherein a stress relaxation of the first adhesive member is about 70% or less, and wherein an absolute value of a difference between the first modulus and the second modulus is about 0.01 MPa or less.

Abstract: Provided is an organic EL display device in which blue brightness is improved, and an antireflection function in an oblique direction is enhanced. The problem is solved by ensuring that a polarizer, a phase difference layer, a circularly polarized light separating layer, and a light emitting element are provided from a viewing side, an in-plane retardation Re(550) of the phase difference layer is set to 100 to 160 nm, the circularly polarized light separating layer is a cholesteric liquid crystal layer having a selective reflection center wavelength in a range of 425 to 475 nm, and a sum of retardations Rth(550) in a thickness direction of members arranged between the polarizer and the light emitting element is set to ?50 to 50 nm.

Abstract: An illumination system is provided that includes a light source configured to emit a first handedness polarization of light onto a body, the first handedness polarization of light having at least one of a circular and an elliptical polarization. The body reflects a second handedness polarization of light. An optical filter is configured to at least one of absorb and reflect the second handedness polarization of light and transmit the first handedness polarization of light.

Abstract: An optical film for improving contrast ratio, a polarizing plate including the same, and a liquid crystal display including the same are disclosed. The optical film for improving contrast ratio includes: a base layer and a contrast ratio improvement layer formed on the base layer, wherein the contrast ratio improvement layer includes a high refractive index resin layer including a patterned portion composed of one or more engraved patterns and a flat portion formed between the engraved patterns and a low refractive index resin layer directly formed on the patterned portion, the engraved patterns have a base angle of 75° to about 90°, and the patterned portion has a P/W value of greater than about 1 to about 10 or less (P is the cycle of the patterned portion (unit: ?m) and W is the maximum width of the engraved pattern (unit: ?m)).

Abstract: The disclosure is directed to a method and apparatus for performing patterned microscopy. The method includes obtaining a microscopy image of an object based on optical signal from the object in response to a first incoming optical beam; and obtaining a contrast-enhancing image based on optical signal from the object in response to a second incoming optical beam. The method also includes generating a patterned mask based on the contrast-enhancing image. The method further includes applying the patterned mask on the microscopy image to obtain a patterned microscopy image. The microscopy image includes a polarization-analyzed reflection confocal microscopy image. The contrast-enhancing image includes a second-harmonic generation microscopy image. The patterned microscopy image includes a second-harmonic patterned polarization-analyzed reflection confocal microscopy image.

Abstract: A wearable device that aids vision of a person is disclosed that includes a display system including a display device, a first polarizer parallel to the display device, a quarter waveplate, and a mirror. The display device, the first polarizer, the quarter waveplate, and the mirror are arranged sequentially such that the display device is disposed at a first end of the display system and the mirror is disposed at a second, opposite end of the display system. The display system has a length corresponding to a focal length of the mirror. A camera system includes a camera and an image stabilization system with a zoom magnification configured to provide up to at or about 60 times zoom. The display system and the camera system are secured to a mount and are movable relative to each other about the mount. The mount is secured to a frame.

Abstract: Provided are a thin stereoscopic image display device that can also deal with a requirement for flexibility and a wearable display device including this stereoscopic image display device. The stereoscopic image display device includes a display panel, an optical element, and a circularly polarizing plate, in which the optical element includes an optically-anisotropic layer that is formed of a liquid crystal compound, the optically-anisotropic layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating along at least one in-plane direction of the optically-anisotropic layer, and circularly polarized light emitted from the display panel is caused to advance in a direction different from a direction in which the circularly polarized light component is incident.

Abstract: In one embodiment, a method of rendering images includes providing eyewear having at least one lens capable of mutual occlusion for optical see-through HMD applications. A display module routes image from an ambient real world environment first through a spatial light modulator so that selective portions of the real world scene can be pixel-wise occluded. The resultant modulated image is then combined with another computer generated virtual image and then routed to the viewer. In another embodiment an electrically actuated switchable occlusion mechanism is provided within the display module that allows the ability to provide the occlusion capability only when needed.

Abstract: An example block assembly for optical signal filtering is provided herein. The block assembly includes a base with at least one aperture to receive a mandrel in a plurality of adjustable positions and orientations relative to an axis of the base. The block assembly also includes a first member and a second member extending from the base.

Abstract: There is provided a polarizing plate with optical compensation layers having the following features: the polarizing plate is excellent in antireflection characteristic in an oblique direction while maintaining an excellent antireflection characteristic in a front direction; the polarizing plate can achieve such excellent antireflection characteristics over a wide wavelength band; and the polarizing plate has a neutral hue in the oblique direction. A polarizing plate with optical compensation layers according to the present invention is used for an organic EL panel. The polarizing plate with optical compensation layers includes: a polarizer; a first optical compensation layer; a second optical compensation layer; a third optical compensation layer; and a fourth optical compensation layer. Each of the first optical compensation layer, the second optical compensation layer, the third optical compensation layer, and the fourth optical compensation layer shows a refractive index characteristic of nx>nz>ny.

Abstract: An optical film includes: a protective layer; and a contrast ratio improvement layer including a first resin layer and a second resin layer facing the first resin layer, the second resin layer and the first resin layer being sequentially stacked from a lower surface of the protective layer, wherein the second resin layer has a refractive index greater than that of the first resin layer. The first resin layer has a patterned portion with at least two embossed optical patterns and flat sections immediately adjacent to and between the embossed optical patterns. The patterned section is in at least a portion thereof facing the second resin layer. A polarizing plate including the optical film and a liquid crystal display apparatus including the polarizing plate are also provided.

Abstract: Optical filters that enhance image quality by exploiting differences in the wavelength dependence of the spectral power distribution (SPD) and the degree of polarization between elements in a scene in order to preserve, and more preferably enhance, color-contrast between one or more salient objects in the scene and/or a salient object and a background. The higher degree of polarization may be associated with the background or the one or more salient objects. Color contrast is associated with one or more of a difference in saturation, a difference in hue, and a difference in lightness.

Abstract: A near-eye display assembly includes an electronic display for providing image light, a circular polarizer disposed downstream of the electronic display for circularly polarizing the image light, and a pancake lens disposed downstream of the circular polarizer for conveying the image light to an eyebox of the near-eye display. The circular polarizer includes a quarter-wave waveplate disposed between the electronic display and the pancake lens, and spaced apart from the electronic display and the pancake lens, to additionally defocus ghost image artifacts at the eyebox.

Abstract: An object of the invention is to provide an optical laminate which has excellent workability in the production of a polarizing plate and is capable of suppressing the occurrence of cracks in the polarizing plate, a polarizing plate, a method of manufacturing the polarizing plate using the optical laminate, and an image display device having the polarizing plate. An optical laminate according to the invention has a polarizer, an optical anisotropic layer, and a masking layer in this order, and hardness HB of the masking layer and hardness HA of a layer adjacent to the optical anisotropic layer side of the masking layer satisfy Expression (1): HA×0.5?HB?HA×2??(1).

Abstract: An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein in-plane retardations Re(H450), Re(H550), Re(H590), and Re(H650) of the first optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, and in-plane retardations Re(Q450), Re(Q550), Re(Q590), and Re(Q650) of the second optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, satisfy specific requirements.

Abstract: An optical device includes a first polarizer which has an absorption axis in a thickness direction; a second polarizer which has an absorption axis in a thickness direction; and a functional layer which is disposed between the first polarizer and the second polarizer and is capable of switching between a state in which an in-plane retardation is 0 and a state in which an in-plane retardation is greater than 0. A display device includes a display element; and the optical device.

Abstract: A circularly polarizing plate includes: a first retardation layer having negative refractive index anisotropy; a second retardation layer having positive refractive index anisotropy; and a linear polarizer, the first retardation layer and the second retardation layer being disposed such that their optical axes are parallel to each other, the first retardation layer providing an in-plane retardation whose absolute value is |R1(?)| to light having a wavelength of ? nm, the second retardation layer providing an in-plane retardation whose absolute value is |R2(?)| to light having a wavelength of ? nm, the first retardation layer and the second retardation layer satisfying the following formulas (1) to (4): |R1(450)|>|R1(550)|>|R1(650)|??(1) |R2(550)|>|R1(550)|??(2) |R2(550)|?|R1(550)|>|R2(450)|?|R1(450)|??(3) |R2(650)|?|R1(650)|>|R2(550)|?|R1(550)|??(4).

Abstract: A laser beam combining system, including at least one beam combining unit. The beam combining unit includes reflective device, polarization conversion element and beam combining device. The reflective device includes two reflective surfaces configured to divide a high-polarization laser into a first beam and a second beam. The first beam is incident on the beam combining device. The polarization conversion element is provided on a propagation path of the second beam to convert the second beam into a light having a polarization direction perpendicular to an original polarization direction of the second beam. The converted light is guided to the beam combining device which is configured to combine the first beam and the converted light into one beam for outputting.

Abstract: A head-worn image display apparatus that comprises a non-immersive image display assembly that receives images from a stereoscopic video camera module. The image display assembly comprises a miniature display component for generating the images for display. The image display assembly may work by an optical relay system. The head-worn image display apparatus could be used in a variety of different settings. One particular application is for performing medical procedures such as microsurgery. The stereoscopic video camera module may have optical magnification capability (e.g. such as in a surgical microscope) to provide a magnified view of the surgical field.

Abstract: A polarizing plate includes: a polarizing film; and an optical film on a surface of the polarizing film, the optical film including a first resin layer and a second resin layer sequentially stacked on the polarizing film, wherein the second resin layer has a higher index of refraction than the first resin layer, a plurality of pattern groups is at an interface between the first resin layer and the second resin layer, each of the pattern groups including at least two embossed optical patterns protruding from the second resin layer and a flat section between adjacent embossed optical patterns, each of the first surfaces being a bottom portion of each of the embossed optical patterns, and, in each pattern group, shortest distances between the first surfaces of the embossed optical patterns and the flat sections immediately adjacent to the embossed optical patterns are sequentially increased, or sequentially decreased.

Abstract: An electronic device may be provided with a display mounted in a housing. The display may have an array of pixels that form an active area and may have an inactive area that runs along an edge of the active area. An opaque layer may be formed on an inner surface of a display cover layer in the inactive area of the display or may be formed on another transparent layer in the electronic device. An optical component window may be formed from the opening and may be aligned with an optical component such as a proximity sensor, ambient light sensor, image sensor, or light source. The optical component window may have a quarter wave plate, a linear polarizer interposed between the transparent layer and the quarter wave plate, and a partially reflective mirror interposed between the optical component and the quarter wave plate.

Abstract: An optical waveguide device and a head-mounted display apparatus using the same are provided. The optical waveguide device used for transmitting an image light includes a light entering surface, a first side surface, a second side surface, and at least one planar reflective structure. The image light enters the optical waveguide device through the light entering surface. The first side surface is parallel to the second side surface. The at least one planar reflective structure is disposed between the first side surface and the second side surface, and the planar reflective structure is parallel to the first side surface. The planar reflective structure and the light entering surface have a distance therebetween.

Abstract: A waveguide display is used for presenting media to a user. The waveguide display includes a light source assembly, an output waveguide, and a controller. The light source assembly projects an image light at least along one dimension. The output waveguide includes a waveguide body with two opposite surfaces. The output waveguide includes an input area, an output area, a first diffractive element on the first side, and a second diffractive element on the second side of the output waveguide. The output area is located between the input area and the first and second diffractive elements. The first and second diffractive elements reflect a second portion of the expanded image light back toward the output area for outcoupling to the eyebox. The controller controls the scanning of the light source assembly to form a two-dimensional image.

Abstract: The present invention provides an optical laminate in which cissing occurring when an optically anisotropic layer is formed and film thickness unevenness are suppressed, and a polarizing plate and an organic EL display device using the same. The optical laminate includes an optically anisotropic layer A, and an optically anisotropic layer B, where layer A and layer B come into direct contact, either or both of layer A and layer B are formed of a composition containing a liquid crystal compound, surface energy A of a surface of layer A on a side in contact with layer B is 30 to 40 mN/m, surface energy B1 of a surface of layer B on a side in contact with layer A is 35 mN/m or more, and surface energy B2 of a surface of layer B opposite to the side in contact with layer A is 25 mN/m or less.

Abstract: The effective focal length of an optical system can be electronically controlled using switchable wave plates in conjunction with polarized light.

Abstract: The device includes a spatial light modulation section having a phase modulation plane to which laser light L1 in a wavelength region longer than an ultraviolet region is input, and on which a phase of the laser light L1 is modulated at each of a plurality of two-dimensionally arrayed regions, to generate modulated laser light L2, a wavelength conversion section having a light incident plane which receives the modulated laser light L2 output from the spatial light modulation section, and converting a wavelength of the modulated laser light L2 into a wavelength in the ultraviolet region, and an image transfer optical system coupling the phase modulation plane of the spatial light modulation section and the light incident plane of the wavelength conversion section, so as to be optically conjugate systems to each other.

Abstract: An optical phase difference component includes: a transparent base with a concave-convex pattern; gaps defined between convex portions of the concave-convex pattern; and a closing layer provided on the concave-convex pattern to connect the convex portions of the concave-convex pattern and to close the gaps. The phase difference property of the optical phase difference component is not reduced, even when the optical phase difference component is joined to another component with adhesive or when load is applied to the optical phase difference component.

Abstract: Disclosed is an organic EL panel translucent substrate that can prevent or reduce the color gap/coloring of an organic EL panel. In order to achieve the above object, organic EL panel translucent substrate 201 is formed of resins 203 and 204 and is substantially optically isotropic in its in-plane direction and thickness direction.

Abstract: According to one embodiment, a pressure sensor includes a film part, and a sensing unit. A circumscribing rectangle circumscribing a configuration of a film surface of the film part has a first side, a second side, a third side connected to one end of the first side and one end of the second side, a fourth side connected to one other end of the first side and one other end of the second side, and a centroid of the circumscribing rectangle. The circumscribing rectangle includes a first region enclosed by the first side, line segments connecting the centroid to the one end of the first side, and to the one other end of the first side. The sensing unit includes sensing elements provided on a portion of the film surface overlapping the first region. Each sensing element includes a first, second magnetic layers, and a spacer layer.

Abstract: A light control device of the present invention includes a first patterning polarizing plate 21 containing a plurality of polarization regions having different absorption axis directions, a second patterning polarizing plate 22 containing the same polarization regions as those of the first patterning polarizing plate 21, and a retardation plate 3, wherein at least any one of the first and the second patterning polarizing plates 21, 22 is disposed slidably in a plane direction. Such a light control device hardly causes color irregularities and hardly causes a pattern.

Abstract: A pulse multiplier includes a polarizing beam splitter, a wave plate, and a set of multi-surface reflecting components (e.g., one or more etalons and one or more mirrors). The polarizing beam splitter passes input laser pulses through the wave plate to the multi-surface reflecting components, which reflect portions of each input laser pulse back through the wave plate to the polarizing beam splitter. The polarizing beam splitter reflects each reflected portion to form an output of the pulse multiplier. The multi-surface reflecting components are configured such that the output pulses exiting the pulse multiplier have an output repetition pulse frequency rate that is at least double the input repetition pulse frequency.