Abstract: An image display apparatus including one or more virtual-image screens, a display section, and a display control unit. The one or more virtual-image screens are arranged to cover at least a part of a periphery of a predetermined axis, display a virtual image of a projected image by using the predetermined axis as a basis, and are transparent. The display section has one or more display surfaces that display a plurality of viewpoint images in mutually different directions and project the plurality of displayed viewpoint images onto the one or more virtual-image screens, respectively, the plurality of viewpoint images being images of a display target as viewed from mutually different directions. The display control unit displays, a virtual image of the display target that is visible from a second direction extending toward the predetermined axis from the observation point.

Abstract: An imaging optical system includes an optical component having a plurality of annular grooves formed to provide a phase to optical ray propagating an effective pupil, the phase causing the longitudinal aberration of the optical ray to alternate plural times to zigzag, and therefore, a focal-depth extended image being clear and having a large focal depth in a uniform image quality is achieved in a wide defocus range in front and back of a focal point.

Abstract: The present invention provides a method for producing a resin molded article through which air bubbles are not easily formed during imprint molding when a curable composition is applied to a mold having a pattern shaped section.

Abstract: The projection screen includes a reflective layer and a light-absorbing layer, where the reflective layer is configured to receive and reflect projection light, and the light-absorbing layer is arranged on the reflective layer; the light-absorbing layer includes a plurality of irregularly arranged light-absorbing members; and the light-absorbing members are configured to absorb at least a part of the projection light, so as to make a brightness of a projected image uniform.

Abstract: Proposed is a lens system capable of providing, to a user, a high-definition image in which generation of concentric circles is reduced. The lens system has one or more Fresnel lenses. A lens surface of each of the Fresnel lenses has a plurality of grooves that is concentrically formed. Both a pitch which is the distance between two adjacent grooves and the depth of each of the plurality of grooves vary with the distance from an optical axis that passes through the center of the lens system.

Abstract: An ocular optical system configured to allow imaging rays from a display image to enter an observer's eye through the ocular optical system so as to form an image is provided. A direction toward the eye is an eye side, and a direction toward the display image is a display side. The ocular optical system sequentially includes a first and a second lens elements having refracting power from the eye side to the display side along an optical axis. Each lens element includes an eye-side surface and a display-side surface. An optical axis region of the eye-side surface of the first lens element is concave. An optical axis region of the eye-side surface of the second lens element is concave.

Abstract: An electrically switchable optical modulator for modulating an optical wavefront transmitted therethrough, comprising a birefringent first optical element and a birefringent second optical element each having respective ordinary and extraordinary refractive indices. A birefringent liquid crystal material is sandwiched between the first and second optical elements. The extraordinary refractive index of the liquid crystal material is electrically switchable between: a first state in which it has a first value; and, a second state in which it has a second value different from the first value. One or both of the first value and the second value is un-matched to the extraordinary refractive index of the first optical element in respect of light polarised in a first direction of linear polarisation, and is un-matched to the extraordinary refractive index of the second optical element in respect of light polarised in a second direction of linear polarisation orthogonal to the first direction.

Abstract: A fluorescence imaging device includes a microplate that holds a plurality of samples generating fluorescence, a lens assembly, and an imaging unit that collectively images the plurality of samples through the lens assembly. The lens assembly includes a Fresnel lens made of a resin, a second protective plate that protects the surface of the Fresnel lens facing the microplate, a spacer that forms a gap between the Fresnel lens and the protective plate, and a frame by which the Fresnel lens, the second protective plate, and the spacer are sandwiched.

Abstract: Provided is a Fresnel lens and display device with such Fresnel lens, the Fresnel lens includes an entrance plane and an exit plane with multiple bump units. The bump units include a First Bump Unit, a Second Bump Unit, and a Third Bump Unit; on one side of the central axis of said lens, the First Bump Unit, Second Bump Unit and Third Bump Unit are placed successively along the radiation direction from the central axis toward the lens edge; on the other side of the central axis of said lens, the First Bump Unit, Second Bump Unit and Third Bump Unit are also placed successively along the radiation direction from the central axis toward the lens edge. The Bump Units on both sides of the central axis of the lens are symmetrical.

Abstract: A multifunctional case for cell phones, tablets, and other personal electronic devices with flip, sliding, and adjustable magnifying lens for viewing a screen is disclosed. The multifunctional case includes options with a detachable lens and a handle, allowing a user carrying a smartphone or similar personal electronic device mounted in the multifunctional case an immediately available means to magnify print on objects, giving the user various ways to eliminate many occasions where reading glassed are needed.

Abstract: A hybrid solar thermal and photovoltaic panel based cogeneration system and heat pump and non-tracking non-imaging solar concentrator based CSP stabilized power generation system comprises a hybrid solar thermal and photovoltaic panel based cogeneration subsystem to cogenerate electricity and heat, a heat pump subsystem to raise the temperature of the cogenerated heat, a non-tracking non-imaging solar concentrator based CSP subsystem to further upgrade the cogenerated thermal energy, a thermal storage to store the cogenerated heat, and a thermal power regeneration system, to take the stored cogenerated heat to regenerate power. The power output of the cogeneration subsystem supplemented with the power output from the thermal power regeneration system realizes stabilized power output.

Abstract: A lens for distribution of light predominantly toward a preferential side from a light emitter having an emitter axis. The lens has a faceted output region, a smooth output surface and at least one reflective surface which reflects light through total-internal-reflection (TIR) toward the faceted output region. The faceted output region is formed by pairs of transverse surfaces each surface of which redirects the received light to provide a composite illuminance pattern. The lens may further have faceted input surfaces at least partially defining a light-input cavity about the emitter axis. The faceted input region are formed by pairs of transverse surfaces each surface of which redirects the received light.

Abstract: A lighting fixture is provided. The lighting fixture includes a housing, a light source assembly, a lens cover, and an anti-deformation assembly, the housing and the lens cover are connected and form a mounting space; the light source assembly is mounted in the mounting space and includes a light source panel, and a connection through-hole is provided in the light source panel; the lens cover includes a cover body and a lens unit on the cover body; and a part of the anti-deformation assembly is in the connection through-hole, and the anti-deformation assembly is connected to the lens unit to apply an action force to the lens unit to cause the lens unit to fit the light source panel.

Abstract: In an illumination system, a lens can substantially collimate light that is emitted from a location on a light source. The emitted light can have a central light portion and a peripheral light portion. The lens can have a first surface that faces the light source and a second surface opposite the first surface. The first surface can include a first convex central portion and a first total internal reflection (TIR) portion. The second surface can include a second convex central portion and a second TIR portion. The first and second convex central portions can substantially collimate the central light portion via refraction at the first convex central portion and refraction at the second convex central portion. The first and second TIR portions can substantially collimate the peripheral light portion via total internal reflection at the first TIR portion and total internal reflection at the second TIR portion.

Abstract: A display device for virtual reality, a viewing device for virtual reality and a head-mounted display apparatus are provided. The display apparatus includes: a display panel; a first polarizer which is disposed on a first surface of the display panel and includes a plurality of first regions and a plurality of second regions, the plurality of first regions and the plurality of second regions being alternately distributed in a first direction, wherein a polarization direction of each of the plurality of first regions is perpendicular to a polarization direction of each of the plurality of second regions.

Abstract: An optical structure includes a refractive material having a refractive index and a multilayer dichroic reflective coating. The multilayer dichroic reflective coating is disposed on the refractive material. The average refractive index of the multilayer dichroic reflective coating is substantially the same as the refractive index of the refractive material.

Abstract: An optoelectronic sensor (10) according to the principle of triangulation for detecting an object (36) in a monitoring region (18) comprises a light transmitter (12) and a spatially resolving light receiver (26). A receiving optics (22) and an optical element (24) are arranged in front of the light receiver (26), wherein the optical element (24) comprises a converging partial region (24a) and a diverging partial region (24c) and is arranged such that a remitted light bundle (20) from an object (36) in a near range of the monitoring region (18) passes through the converging partial region (24) and a remitted light bundle (20) from an object (36) in a far range of the monitoring region (18) passes through the diverging partial region (24c).

Abstract: A Fresnel lens includes a Fresnel surface that includes effective Fresnel surfaces allowing imaging rays to pass through. Two adjacent effective Fresnel surfaces are connected through a non-effective Fresnel surface. On a cross-section including an optical axis of the Fresnel lens, a draft angle is between a reference line and a connecting straight line between one end of each non-effective Fresnel surface located at a tooth peak of the Fresnel lens and the other end of each non-effective Fresnel surface located at a tooth valley of the Fresnel lens. The optical axis coincides with the cross-section. The reference line is parallel to the optical axis and passes through the end of the effective Fresnel surface located at the tooth peak of the Fresnel lens. The draft angles each smaller than 90 degrees include first, second, third, fourth, and fifth draft angles which gradually increase radially outward from the optical axis.

Abstract: A cloaking device includes an object-side, an image-side, a cloaked region between the object-side and the image-side, and a reference optical axis extending from the object-side to the image-side. A plurality of object-side Fresnel mirrors, a plurality of image-side Fresnel mirrors and a planar reflection boundary positioned between the plurality of object-side Fresnel mirrors and the plurality of image-side Fresnel mirrors are included. Each of the Fresnel mirrors comprises an outward facing reflection surface. Light from an object positioned on the object-side of the cloaking device and obscured by the cloaked region is redirected around the cloaked region by the plurality of object-side Fresnel mirrors, the planar reflection boundary and the plurality of image-side Fresnel mirrors to form an image of the object on the image-side of the cloaking device such that the light from the object appears to pass through the cloaked region.

Abstract: An automobile lamp includes a lamp seat, a lighting unit, and a light guiding member. The lighting unit is positioned on the lamp sear. The light guiding member is disposed on the lamp seat and covers the lighting unit. The light guiding member is formed with a plurality of ribs thereon. The ribs form a corrugated structure along the radial direction of the light guiding member. When a plurality of light beams are emitted from the lighting unit into the light guiding member, part of the light beams travels along the corrugated structure.

Abstract: A method and device for selecting a word to be defined in a mobile communication terminal having an electronic dictionary function. The method includes selecting a word in a displayed text document in response to a first input, displaying the selected word in a search window, searching for the displayed word in response to a request to search for the displayed word, displaying information resulting from the search, and terminating display of the information and displaying the text document.

Abstract: An ultra thin lighting element including at least one light source (1b). A lightguide element (2c) includes one lightguide layer comprising a plurality of discrete fine optic surface relief structures (3e) on at least one portion of at least one surface. Each surface relief structure (3e) includes basic structural features on the order of about 10 microns or less in height, and on the order of about 10 microns or less in each lateral dimension. The number, arrangement and size of each surface relief structure (3e) and height and lateral dimensions of the structural features of the surface relief structures (3e) being varied to provide a desired degree of outcoupling modulation of light incoupled into the light guide element.

Abstract: Backlights are disclosed. More particularly, temporally multiplexed backlights utilizing asymmetric turning films are disclosed. The disclosed backlights are capable of displaying a primary image to on-axis viewers while simultaneously providing a secondary image to off-axis viewers.

Abstract: A lens configured for transmitting light in a first medium to a first reference pupil includes an optically transparent substrate having a plurality of Fresnel structures. A draft angle of a respective Fresnel structure is based on a distance of the respective Fresnel structure from a reference axis of the lens. The draft angle of the respective Fresnel structure is between a first angle and a second angle. The first angle corresponds to a direction of a ray, in the first medium, transmitted from a reference off-axis position through the respective Fresnel structure toward a second reference pupil located further away from the substrate than the first reference pupil. The second angle corresponds to a direction of the ray, in the optically transparent substrate, transmitted from the reference off-axis position through the respective Fresnel structure toward the second reference pupil.

Abstract: An eyepiece lens with protected Fresnel and diffractive surfaces. An eyepiece is provided with a first element having an optical axis and a diffractive structure comprising a plurality of diffraction facets formed on at least one surface of a first element, and a second element having a Fresnel structure comprising a plurality of Fresnel facets formed on at least one surface thereof, the respective draft angles of the Fresnel facets relative to the optical axis being proximate the respective incidence angles of their respective adjacent incident light rays of a nominal design so as to minimize light obscuration and scatter, the first element and the second element having essentially the same optical axis, the diffractive surface of the first element being adapted to compensate for chromatic dispersion introduced by the refractive properties of said first and second elements.

Abstract: A Fresnel lens system, comprising at least two tooth faces located on the same light path; each of the tooth faces comprises at least one Fresnel unit, each Fresnel unit being a Fresnel refraction surface formed by an original curved surface; at least one of the two tooth faces is a complex Fresnel refraction surface or a filled Fresnel refraction surface, or the two tooth faces are at a same physical interface and an element located thereon has a reflective back surface. The Fresnel lens system can adequately utilize the advantage of thinness of Fresnel lens, thus better adjusting the light path without a significant increase in the thickness of the system.

Abstract: The present invention relates to a Fresnel lens and a respective mold, the lens comprising a plurality of draft facets, wherein the draft angle of the draft facets has at least two different angular values for two different draft facets, in particular, wherein the draft angle is bigger for a draft facet closer to the edge of the lens or, respectively, of the mold, than for a draft facet closer to the center of the lens or, respectively, of the mold.

Abstract: A method of making a nanostructure and nanostructured articles by depositing a layer to a major surface of a substrate by plasma chemical vapor deposition from a gaseous mixture while substantially simultaneously etching the surface with a reactive species. The method includes providing a substrate; mixing a first gaseous species capable of depositing a layer onto the substrate when formed into a plasma, with a second gaseous species capable of etching the substrate when formed into a plasma, thereby forming a gaseous mixture; forming the gaseous mixture into a plasma; and exposing a surface of the substrate to the plasma, wherein the surface is etched and a layer is deposited on at least a portion of the etched surface substantially simultaneously, thereby forming the nanostructure. The substrate can be a (co)polymeric material, an inorganic material, an alloy, a solid solution, or a combination thereof.

Abstract: A lighting fixture projects light sideward and has no restriction in design. The lighting fixture can include an LED; a primary lens disposed in an optical axis of the LED, the primary lens being configured to form a main light distribution; an auxiliary lens disposed on an outer peripheral side of the primary lens around the optical axis of the LED; and a reflecting portion configured to reflect part of light emitted from the LED to substantially an entire area of the auxiliary lens on an inner peripheral surface side thereof. The reflecting portion can be formed integrally with the primary lens and include an incident surface on which part of light emitted from the LED can be incident, a reflecting surface configured to reflect light having entered through the incident surface, and a light-exiting surface configured to allow the light reflected by the reflecting surface to exit.

Abstract: A lens includes an optically transparent substrate having a first lens surface and a second lens surface opposite to the first lens surface. The first lens surface includes a plurality of Fresnel structures. A respective Fresnel structure of the plurality of Fresnel structures includes a slope facet and a draft facet. The draft facet is characterized by a draft angle. The draft angle of the respective Fresnel structure is based on a distance of the respective Fresnel structure from a center of the lens.

Abstract: Solar light redirecting glazing units include light redirecting and light diffusing constructions. The solar light redirecting glazing units may include a glazing substrate, a visible light diffusing layer, and a light redirecting layer oriented such that incoming solar light contacts the visible light diffusing layer before contacting the light redirecting layer. The solar light redirecting glazing units may include a glazing substrate, a patterned visible light diffusing layer, and a light redirecting layer. The solar light redirecting glazing units may include two glazing substrates separated by an intervening space with a solar light redirecting layer disposed on one glazing substrate, and a visible light diffusing layer disposed on the other glazing substrate.

Abstract: The invention relates to a surface structure and a Fresnel lens which has at least one such surface structure. Furthermore, the invention relates to a tool for production of a surface structure and a method for production of a surface structure or Fresnel lens. Furthermore, the invention relates to the use of a Fresnel lens.

Abstract: A multi-segment optical component applied to increase signal-to-noise ratio includes a base, a central lens portion, an isolating lens portion and a collecting lens portion. The central lens portion is disposed on center of the base. The isolating lens portion is disposed by a side of the central lens portion, and the collecting lens portion is disposed by the other side of the central lens portion opposite to the isolating lens portion. At least one of the isolating lens portion and the collecting lens portion has a curvature radius different from a curvature radius of the central lens portion, and the curvature radius of the isolating lens portion can be similar to or different from the curvature radius of the collecting lens portion. The central lens portion has a central axle which does not overlap a curvature center of one of the isolating lens portion and the collecting lens portion.

Abstract: Presented and described herein are faceplate borders and screen protectors for use on mobile electronic devices. Further presented is a method of attachment for the screen protector described herein and a method of minimizing separation of a screen protector from a mobile electronic device.

Abstract: An animated poster system including a simulation panel, an image server having appropriately processed media, and a projector enable a moving image to appear on a textured surface of the panel with no detectable projection devices. The simulation panel includes a portion that, when illuminated by the projector with the media, appears to be paper that is wrinkled, torn, and/or pasted to the wall, and includes graphics that also appear to be printed but include moving images. The animated poster system can produce a convincing illusion of an animated poster, even at close observing distances.

Abstract: The exemplary embodiments of the present invention include a driving substrate, a light source arranged on the driving substrate, a luminous flux control member arranged on the light source, and lug members arranged at a bottom surface of the luminous flux control member and extended to a direction of the light source.

Abstract: The present invention pertains to an ultraviolet-ray-curable organopolysiloxane composition containing: (A) (A-1) a straight-chain organopolysiloxane containing an alkenyl group, and (A-2) a three-dimensional-network-shaped organopolysiloxane resin containing an R12R2SiO1/2 unit, an R13SiO1/2 unit, an SiO2 unit, and an alkenyl group; (B) an organohydrogenpolysiloxane; (C) a photoactive platinum complex curing catalyst; and (D) an organopolysiloxane oligomer containing an R12R2SiO1/2 unit or the R12R2SiO1/2 unit and an R13R2SiO1/2 unit, also containing an R1SiO3/2 unit, not containing an SiO2 unit, and also containing an alkenyl group. As a result, this ultraviolet-ray-curable organopolysiloxane composition retains high strength and does extremely well suppressing heat-induced expansion or contraction; hence, it is possible to transfer a pattern and print with high dimensional accuracy.

Abstract: The invention relates to a multi-layer body (10) and a process for the production thereof. The multi-layer body has a first layer (23) with a first surface (231) and a second surface (232) opposite the first surface (231). The first surface (231) of the first layer (23) is defined by a base plane spanned by coordinate axes x and y, wherein a large number of facet faces (50) are molded into the second surface (232) of the first layer (23) in a first area (31). Each of the facet faces (50) is determined by one or more of the parameters F, S, H, P, Ax, Ay and Az, wherein the parameters of the facet faces (50) arranged in the first area (31) are varied pseudorandomly in the first area (31) within a variation range predefined in each case for the first area of surface and wherein a reflective second layer (24) is applied to each of the facet faces.

Abstract: There is provided a particle detector that can increase a detection sensitivity to fluorescence emitted from biogenic particles. A particle detector for detecting biogenic particles includes a substrate having a principal surface and configured to collect the biogenic particles on the principal surface, a light emitting element configured to irradiate particles collected on the principal surface with excitation light, and a light receiving element configured to receive fluorescence emitted from the particles when the particles are irradiated with the excitation light from the light emitting element. An optical axis of the Fresnel lens and a ray direction of the excitation light intersect with each other. The principal surface is a mirror surface.

Abstract: Bezel-concealing display covers and display devices are disclosed. In one example, a bezel-concealing display cover includes a bezel and a display panel includes a perimeter portion having a first surface and a second surface such that the perimeter portion is configured to be offset from the bezel of the display device by a gap GA. The bezel-concealing display cover further includes a first array of prisms on at least one of the first surface or the second surface of the perimeter portion that extend from an edge of the perimeter portion to a distance L. Each prism of the first array of prisms has a prism angle ?, and the first array of prisms is configured to shift a portion of an image proximate the bezel produced by the display panel such that the shifted portion of the image appears over the bezel to an observer.

Abstract: According to one aspect, an optical lens includes a substrate having a first side and a second side opposite the first side. The optical lens includes a first pattern of Fresnel features having a first focal length disposed on the first side and a second pattern of Fresnel features having a second focal length disposed on the second side. The first pattern of Fresnel features is disposed perpendicular to the second pattern of Fresnel features, and the first focal length is different from the second focal length.

Abstract: An image-capturing lens is disclosed in the disclosure. The image-capturing lens includes a central portion and a periphery portion. The central portion includes a plurality of optical elements arranged in a circular fashion, and each of the optical elements differs in thickness. The periphery portion extends peripherally from the central portion and has a constant thickness. The thickness of the periphery portion is smaller than a thickness of one of the plurality of optical elements that is approximate to the periphery portion.

Abstract: An optical lens assembly including a circular Fresnel lens having a plurality of contiguous radial lens sections where each lens section provides the same range of focal lengths and where each lens section includes a plurality of lens segments along a radial direction. Each of the lens segments is curved in both a radial direction and a rotational direction so that one radial edge of the section includes a relatively small curvature and large radius and an opposite radial edge of the lens section includes a relatively large curvature and small radius so that each lens segment separately provides the range of focal lengths. A light filter is positioned adjacent to the Fresnel lens and includes a plurality of radial control lines that are controlled to make the control lines opaque or transparent so that light propagates through parts of the lens sections having the same focal length.

Abstract: A linear Fresnel lens sheet (3) includes: a lens layer (10) having a first surface (11) in which a linear Fresnel lens portion (13), having a number of lens surfaces (14) arranged in a first direction d1, is formed, and a second surface (12) opposite the first surface (11); and a diffusion layer (20) disposed on the side of the second surface (12) of the lens layer (10).

Abstract: A guide lamp apparatus for a vehicle may include a light source, a light division lens that may be arranged on a front of the light source and divides a light emitted from the light source into a plurality of lights, and a front light collection lens that may be arranged on a front of the light division lens and forms predetermined patterned images on a road surface.

Abstract: A lens includes a light incident face, a light exit face opposite to the light incident face and a plurality of micro dot patterns formed on the light exit face. The light incident face is a concave face and the light exit face is a convex face. The plurality of micro dot patterns are positioned at a central portion of the light exit face. A light source module incorporating the lens is also provided. The light source module includes a light emitting diode emitting light into the lens through the light incident face. The micro dot patterns direct the light from the light emitting diode and through the central portion of the light exit face toward a peripheral side of the lens.

Abstract: A method of making a nozzle chip includes a step of reduction-projection-exposing a photosensitive resin material to exposure light through a mask by using a reduction-projection-exposure apparatus, the mask having a light-transmitting pattern formed thereon; and a step of forming an ejection orifice pattern corresponding to the light-transmitting pattern on the photosensitive resin material by performing a developing operation. The exposure light in the step of reduction-projection-exposing is passed through a correction mechanism before the exposure light reaches the photosensitive resin material, the correction mechanism being configured to suppress an inclination of a chief ray due to off-axis telecentricity that occurs in the reduction-projection-exposure apparatus.

Abstract: A display device includes a holding device that can be placed on the head of a user. An image-generating module and an imaging lens system can be secured on the holding device. The latter includes a spectacle lens with a curved front and a curved back. It projects the image generated when the holding device is placed on the head such that the user can perceive it superimposed on the surroundings. Light from the image-generating module is coupled into an optical channel in the spectacle lens. It is conducted in the optical channel to an exit section and coupled via the exit section out of the spectacle lens. The optical channel includes in the region of the front and back a Fresnel structure with a plurality of facets on which the light conducted in the optical channel is reflected, and which are aligned parallel to one another.

Abstract: A surgical lamp for illuminating an operating site includes a lamp body that includes first and second light sources that respectively generate first and second light fields of different diameter on the operating site. When a change in a distance between the lamp body and the operating site is detected, the first and second light intensities of the first and second light sources, respectively, can be controlled such that the predetermined diameter (dx) at which the preset relative central illuminance (Ecx) of the resultant light field is generated is maintained at a substantially constant value as the distance changes.

Abstract: The present invention relates to a Fresnel lens and a respective mold, the lens comprising a plurality of draft facets, wherein the draft angle of the draft facets has at least two different angular values for two different draft facets, in particular, wherein the draft angle is bigger for a draft facet closer to the edge of the lens or, respectively, of the mold, than for a draft facet closer to the center of the lens or, respectively, of the mold.