Abstract: The present invention provides a wavelength conversion board comprising a substrate; one or more fluorescence members each containing a fluorescence substance for converting excitation light into fluorescence, the fluorescence member being disposed on or above the substrate; and a flexible gel disposed around the fluorescence member. The present invention also provides a wavelength conversion board comprising a substrate; a fluorescence member containing fluorescence substance for converting excitation light into fluorescence, the fluorescence member being disposed on or above the substrate; a fluent material disposed around the fluorescence member; a light-transmissive plate parallel to the substrate; and a sealing member disposed around the fluent material in a cross section of the wavelength conversion board. The fluorescence member is interposed between the light-transmissive plate and the substrate in the cross section of the wavelength conversion board.

Abstract: A spectral image sensor device comprises a first optical system 47 and 48 including an objective lens, a luminous fluxes selecting member 55 for allowing a part of the luminous fluxes to pass via the first optical system selectively, an optical member 58 where the luminous fluxes selecting member is disposed so as to be at focal position on an object side or approximately at focal position on an object side, and an interference membrane is formed, and wavelength range of the luminous fluxes for passing through the luminous fluxes selecting member is selected, depending on position of the luminous fluxes selecting member, a second optical system 49 for guiding the luminous fluxes toward the optical member, and an image sensor 52 for receiving a light in wavelength range as selected by the optical member.

Abstract: Provided is an optical receiver including a first delay interferometer, a second delay interferometer, and an input light splitting portion for inputting modulated light. The first delay interferometer includes a first light splitting portion for splitting the input light into first light and second light, a first reflecting portion and a second reflecting portion for causing the first light and the second light to return to the first light splitting portion. The second delay interferometer includes a second light splitting portion for splitting the input light into third light and fourth light, a third reflecting portion and a fourth reflecting portion for causing the third light and the fourth light to return to the second light splitting portion. A region between the first light splitting portion and the second reflecting portion intersects with a region between the second light splitting portion and the fourth reflecting portion.

Abstract: An optical system and method for combining multiple beams along a single light path is disclosed. In a preferred embodiment, a plurality of bandpass filters are arranged about the sides of a regular pentagon, the band pass filters being reflective of light wavelengths outside of the bandpass range. A plurality of light sources are positioned such that light from a source passes through an associated bandpass filter, preferably at an angle of about 18°. Light from the first light source passes out of the pentagonal housing after passing through the filter. Light from the other light sources are reflected off of the interior surfaces filters so as to combine with the light from the first light source.

Abstract: A digital camera component is described that has a light splitter cube having an entrance face to receive incident light from a camera scene. The cube splits the incident light into first, second, and third color components that emerge from the cube through a first face, a second face, and a third face of the cube, respectively. First, second, and third image sensors are provided, each being positioned to receive a respective one of the color components that emerge from the first, second, and third faces of the cube. Other embodiments are also described and claimed.

Abstract: An identification film and pattern having high transparency and a reflectance spectrum with respect to a particular wavelength and including photonic crystals patterned into a particular shape and an anticounterfeiting product including the same are disclosed. A highly transparent colloidal photonic crystal film is easily manufactured using photocurable colloidal suspensions. Even though a plurality of patterns (including sub-patterns) is formed in plural films, there is no reduction in optical characteristics such as transparency, reflectance spectra, and the like. Thus, a film patterned into a desired shape is manufactured and thus usability thereof is enhanced, and a plurality of reflectance spectra with various wavelength ranges is provided and thus identification capability or security is enhanced.

Abstract: A diode laser module includes a laser diode (1), an anamorphic prism pair (5) consisting of a pair of prisms (3, 4) having mutually different apex angles and/or made of material having mutually different refractive indices, and a partial reflective mirror (6; 16) disposed on a side of the anamorphic prism pair away from the laser diode and having a planar or spherical surface facing the anamorphic prism pair and coated with partial reflective coating (6a; 16a). The wavelength of the laser output can be changed by adjusting the position of the partial reflective mirror.

Abstract: An optical body includes a first optical layer having a concave-convex surface, a wavelength-selective reflecting layer formed on the concave-convex surface, and a second optical layer formed on the wavelength-selective reflecting layer to embed the concave-convex surface, the wavelength-selective reflecting layer having a multilayer structure formed by successively stacking at least a first high refractive index layer, a metal layer, and a second high refractive index layer, wherein, given that optical film thicknesses of the first high refractive index layer and the second high refractive index layer are x and y, respectively, and a geometrical film thickness of the metal layer is z, x, y and z satisfy the following formula (1): z ? 12.1 ? exp ? { - 1 2 ? ( x - 120 145.17 ) 2 - 1 2 ? ( y - 120 123.

Abstract: A fluorescence endoscopy video system includes a multimode light source that produces light for color and fluorescence imaging modes. Light from the light source is transmitted through an endoscope to the tissue under observation. The system also includes a compact camera for color and fluorescence imaging. Images obtained through the endoscope are optically divided and projected onto one or more image sensors by a fixed beam splitter in the camera. The fixed beam splitter eliminates the need for inserting a movable mirror into the light path between the endoscope and the image sensors. Image signals from the camera are processed in the system processor/controller where a contrast enhancement function can be applied. The contrast enhancement function increases the color contrast between normal tissue and tissue suspicious for early cancer. Finally, the system also includes a calibration feature whereby the system performance can be maintained when used with different endoscopes.

Abstract: A method of aligning an upper substrate and a lower substrate is provided. The upper and lower substrates are oppositely arranged, and the aligning method includes the following steps: providing an optical image capturing module; emitting light rays to a third surface of a first prism; filtering the light rays, so that the light rays are divided into light rays at the first wavelength range and light rays at the second wavelength range, wherein the light rays at the first wavelength range irradiate a pattern on the upper substrate, and light rays at the second wavelength range irradiate a pattern on the lower substrate; reflecting a pattern image on the upper substrate to an image capturing apparatus; reflecting a pattern image on the lower substrate to the image capturing apparatus; and determining locations of the patterns of the upper and lower substrate that are on the image capturing apparatus.

Abstract: A method is provided that includes providing a light source having a light emitting diode (LED) that emits a light. A polarization conversion system (PCS) is located adjacent the LED and has both a linear polarizer and a wave plate. A polarizing beam splitter (PBS) is adjacent the light source and an imaging device is adjacent the PBS. The wave plate of the PCS is rotated to a first position, and a first light is emitted by the LED in the first light source. This first light is converted to circular polarization. This first light travels to the PBS where it is reflected onto the imaging device. The wave plate is then rotated to a second position, and a second light is emitted by the light source. This second light is converted to circular polarization and reflects from the PBS onto the imaging device.

Abstract: A system, apparatus, and method may provide laser beams of two or more wavelengths from diode pumped solid-state laser sources (220, 222, 224). The beam paths of these laser beams with different wavelengths, which are generated by the laser sources (220, 222, 224), may be aligned along a common optical axis 280 by an optical configuration, to treat at least one target area. Frequency-doubled laser beams, output from a plurality of diode pumped solid state laser cavities, may be passed through fold mirrors (M2, M5, M8), and combined on a common optical axis 280, using one or more combiner mirrors (M10, M11, M12), to unify the beam paths. Selected laser beams may be delivered to a target using one or more delivery systems.

Abstract: Embodiments of the present invention provide an optical splitting device, an optical multiplexing device and method, and an optical add-drop multiplexer, which relate to the technical field of communications, and are invented for improving the performance and decreasing the cost. The optical splitting device includes a substrate, where an anti-reflective coating is disposed on an upper surface of the substrate and a filter membrane is disposed at a lower surface of the substrate; and further includes a light redirecting portion disposed opposite to the filter membrane. An optical signal is incident to the filter membrane at a first specified angle, a light wave of a first wavelength in the optical signal penetrates the filter membrane, so that the light wave of the first wavelength is separated from the optical signal.

Abstract: A beam combining device for combining light from a first light source and light from a second light source of a light-source device for a medical apparatus includes a body made of a transparent material, a face which reflects in at least either a dichroic or polarization-dependent manner and is situated in or on the body, which face is transparent to light having a first spectrum or a first polarization and reflects light having a second spectrum or a second polarization, and a light-entrance face on the body, which light-entrance face is provided and arranged so that light enters the beam combining device through the light-entrance face. At least either the light-entrance face or the face reflecting in a dichroic or polarization-dependent manner is curved.

Abstract: A method for manufacturing an optical element includes forming a functional layer (half mirror layer) on a first face of a first translucency member that is made of cyclo olefin polymer or cyclo olefin copolymer, and forming an inorganic coating layer having translucency (silicon oxide layer) on a second face of a second translucency member that is made of cyclo olefin polymer or cyclo olefin copolymer. The method for manufacturing an optical element further includes bonding the first face side of the first translucency member to the second face side of the second translucency member by an adhesive layer.

Abstract: Technology is described for a projection optical system which optically couples image light from an image source to a near-eye display (NED) of a wearable near-eye display device. The projection optical system and the image source make up a projection light engine. Light from the image source is directed to a birdbath reflective optical element which is immersed in high index glass. The image light is reflected and collimated by the birdbath element and travels outside a housing of the projection light engine forming an external exit pupil, meaning the exit pupil is external to the projection light engine. A waveguide optically couples the image light of the external exit pupil. An example of a waveguide which can be used is a surface relief grating waveguide.

Abstract: An improved filter wheel is disclosed, through embodiments, that comprises a plurality of reflector support structures formed as a unitized structure with a circular base member. In some embodiments, the filter wheel further comprises a plurality of light sources mounted on the filter wheel.

Abstract: An optical body includes a first optical layer having a concave-convex surface, a wavelength selective reflecting layer formed on the concave-convex surface, and a second optical layer formed on the wavelength selective reflecting layer and embedding the concave-convex surface. The wavelength selective reflecting layer selectively directionally reflects light in a particular wavelength band while transmitting light other than the particular wavelength band therethrough. The concave-convex surface is made up of a plurality of triangular pillars arrayed in a one-dimensional pattern, and the triangular pillar has an apex angle ? and a slope angle ?, the apex angle ? and the slope angle ? satisfying a predetermined relationship.

Abstract: An optical element is provided with an optical layer in which a concavo-convex surface is formed on the surface thereof, and a wavelength-selective reflection layer formed on the concavo-convex surface. The wavelength-selective reflection layer directionally reflects light having a specific wavelength band selectively, while transmitting light having wavelength bands other than the specific wavelength band. The concavo-convex surface is provided with a plurality of first structural elements that are extended in a first direction within the surface of the optical layer and a plurality of second structural elements that are extended in a second direction within the surface of the optical layer, and placed to be spaced apart from each other, with the first direction and the second direction intersecting with each other.

Abstract: A projection system based on self emitting display panels is described, in which the projection technology involves organic/inorganic electroluminescent display panels with spatially separated color segments. The color pictures are shown in three spatially separate segments. A color combination mechanism, such as dichroic mirrors, are used to merge the three color pictures to a color picture. One of the advantages of the present invention is that only the on state pixel is driven to a bright state that uses energy. The off state pixel need not be driven to a bright state and therefore the energy consumption is virtually nothing. Another advantage is that the system does not require a separate light source and display panel. Therefore the projection system can be made very compact, which is extremely useful for portable projection systems.

Abstract: A light source apparatus includes: an excitation light source including a laser light source; a first wheel that is controlled to rotate, and includes, in a part of a surface thereof to be illuminated by excitation light emitted from the excitation light source, a phosphor layer to be excited by the excitation light; a dichroic mirror that guides fluorescence emitted from the phosphor layer of the first wheel and the excitation light to an illumination optical system; and a second wheel that is controlled to rotate, and includes a dichroic filter that transmits light having a desired wavelength component of each of the fluorescence and the excitation light output from the dichroic mirror.

Abstract: An apparatus for combining light from multiple laser sources has a first laser array to emit beams of a first wavelength in parallel and in a first plane and a second laser array to emit beams of a second wavelength in parallel with emitted beams in the first laser array. A beam combiner on a transparent body has a rear surface and an incident surface at an oblique angle to the first plane. Intersection of the incident surface with the first plane is oblique to the emitted beams. The beam combiner has a first coating on the incident surface that intersects the first plane and transmits the first wavelength. A rear reflective coating reflects first and second wavelengths. A second coating on the incident surface is coplanar with the first coating and transmits the second wavelength and reflects the first wavelength. A third coating reflects first and second wavelengths.

Abstract: An apparatus for providing pump light of a first wavelength ?1 to a laser that emits a second wavelength ?2 has first and second lasers of the wavelength ?1 to direct light along first and second axes in a first direction. The first and second axes define a first plane P1. To form a composite light beam of wavelength ?1, a filter apparatus has a first filter on a first surface at an oblique angle to the first and second axes and that transmits ?1 and reflects ?2. A second filter on a second surface parallel to the first surface, reflects ?1 and transmits ?2. A third filter formed on the first surface coplanar with the first filter reflects ?1 and transmits ?2. The filter apparatus re-aligns the first and second axes along a second plane P2, orthogonal to P1 and parallel to the first direction.

Abstract: A molded dichroic mirror and method of manufacture thereof. The dichroic minor may be molded from polysiloxane or lithia potash borosilicate and may be coated to reflect an infrared signal and configured to transmit a radio frequency signal between 33 GHz and 37 GHz.

Abstract: A multi-band refractive optical imaging system. In one example, the system includes a plurality of lenses configured to receive and propagate electromagnetic radiation in at least the visible spectral band and the longwave infrared (LWIR) spectral band, the plurality of lenses including a first group of lenses of a first crown material, at least one lens of a first flint material, and at least one lens of a second material different than the first crown material and the first flint material. The plurality of lenses includes at least one crown-flint pair configured as an achromat to provide color correction in the visible and/or LWIR spectral bands. The system also includes a first beamsplitter configured to separate the electromagnetic radiation into the visible spectral band and the LWIR spectral band, and a rear external aperture stop positioned between the plurality of lenses and the first beamsplitter.

Abstract: A system and method for stabilizing WBC systems utilizing retro reflectors.

Abstract: Waveguide array optical power splitters that provide compact, low-cost implementation of optical power splitting for one and two dimensional optical waveguide arrays are disclosed. The optical power splitters do not introduce mode dependent loss and preserve polarization, enabling the optical power splitters to be used with multimode and single mode light sources. In one aspect, an optical power splitter includes a beamsplitter to receive a plurality of incident beams of light. The beamsplitter splits each incident beam of light into a plurality of output beams of light with each output beam output in a different direction from the beamsplitter. The optical power splitter includes a first set of lenses with each lens to approximately collimate one of the incident beams of light, and includes a second set of lenses with each lens to focus the output beams of light.

Abstract: An endoscope light source unit comprising: a first light source section emitting a first illumination light composed of white light; a second light source section emitting a second illumination light orthogonally to a direction in which the first illumination light travels; a light combining member transmitting the first illumination light through a transmission section and, at the same time, reflecting the second illumination light by means of a reflection section to form a combined light so that a beam of the second illumination light may be located in a central part of a beam of the first illumination light; a shaping lens for modifying the beam of the second illumination light emitted; and a condenser lens for converging the combined light.

Abstract: An optical system and method for combining multiple beams along a single light path is disclosed. In a preferred embodiment, a plurality of bandpass filters are arranged about the sides of a regular pentagon, the band pass filters being reflective of light wavelengths outside of the bandpass range. A plurality of light sources are positioned such that light from a source passes through an associated bandpass filter, preferably at an angle of about 18°. Light from the first light source passes out of the pentagonal housing after passing through the filter. Light from the other light sources are reflected off of the interior surfaces filters so as to combine with the light from the first light source.

Abstract: The disclosure is directed to a system and method of controlling spectral attributes of illumination. According to various embodiments, a portion of illumination including an excluded selection of illumination spectra is blocked, while another portion of the illumination including a transmitted selection of illumination spectra is directed along an illumination path. In some embodiments, optical metrology is performed utilizing the spectrally controlled illumination to enhance measurement capability. For instance, the spectral attributes of illumination utilized to analyze different portions of a sample, such as different semiconductor layers, may be selected according to certain measurement characteristics associated with the analyzed portions of the sample.

Abstract: A production system includes a structure configured to house a light-activated biological pathway. The production system further includes an optical filter attached to the structure. The optical filter is configured to receive light, to reflect a first portion of the received light, and to transmit a second portion of the received light, wherein the first portion has a different wavelength from the second portion. The production system is further configured to position the light-activated biological pathway to receive the second portion of the receive light.

Abstract: A wavelength selective switch for selectively switching optical wavelength components of an optical signal uses both LCoS and MEMs switching technologies to improve device performance. Specific performance improvements may include more ports, better spectral performance and isolation, improved dynamic crosstalk, more flexible attenuation options, integrated channel monitoring and compressed switch heights.

Abstract: A beam combiner includes a first lens and a second lens coated with specific optical films. The first color light beam enters the first lens via a first incidence surface with an incidence angle of Brewster's angle. The second color light beam enters the first lens via the second incidence surface with an incidence angle of zero degree. The third color light beam enters the second lens via the third incidence surface with an incidence angle of zero degree. The first, the second, and the third color light beams transmit in the same path after the splitting face to form the composite light beam and come out via an exit surface.

Abstract: In a projector which includes a light source unit 63, a light smoothing unit, a display device, a projection side optical system and a projector control unit, the light source unit 63 includes a light generating device for generating light of a specified wavelength band which includes a first light source 152 which is a light emitting diode or solid-state light emitting device for emitting light of a predetermined wavelength band, a second light source 153 which is a light emitting diode or a solid-state light emitting device for emitting excitation light, and a third light source 154 for emitting light of the same wavelength band as that of the first light source 152 using the light emitted from the second light source 153 as excitation energy, and the third light source 154 is formed by a phosphor which transmits light from the first light source 152 and absorbs light emitted from the second light source 153.

Abstract: An apparatus for combining light from multiple laser sources has a first laser array to emit beams of a first wavelength in parallel and in a first plane and a second laser array to emit beams of a second wavelength in parallel with emitted beams in the first laser array. A beam combiner on a transparent body has a rear surface and an incident surface at an oblique angle to the first plane. Intersection of the incident surface with the first plane is oblique to the emitted beams. The beam combiner has a first coating on the incident surface that intersects the first plane and transmits the first wavelength. A rear reflective coating reflects first and second wavelengths. A second coating on the incident surface is coplanar with the first coating and transmits the second wavelength and reflects the first wavelength. A third coating reflects first and second wavelengths.

Abstract: A head-up display system for a vehicle facilitating the use of night vision goggles for a person in the vehicle during night vision conditions. The system includes a light source for providing light to an image source. The image source is arranged to project an image on a semi-transparent combiner mirror. The combiner mirror is arranged to superimpose the projected image onto a view of the environment in front of the vehicle by transmitting light rays from the environment and at the same time reflecting the projected image towards the eyes of an observer. The system includes a first and a second light source for alternatively providing light to the image source. The first light source is arranged to emit light of a first color to be used during daylight conditions, and the second light source is arranged to emit light of a second color to be used during night vision conditions, wherein the second color is mainly yellow or mainly orange.

Abstract: In various embodiments, an optical element may include: a first planar base area; and a second planar base area; wherein the first base areas and second base areas do not lie in a same plane; wherein the first base area has a coating, which is designed to reflect or transmit an electromagnetic wave according to a predefined criterion; wherein the predefined criterion concerns a property of the electromagnetic wave which is different from an intensity; wherein a surface structure is arranged at the second base area of the optical element, said surface structure being formed integrally with the base area; and wherein the surface structure is designed to shape an intensity profile of a light beam impinging on the surface structure of the optical element.

Abstract: A projector has at least four primary color components controlled to produce a metameric effect image which is not perceptible to the human optical system and is perceptible to a video recording device.

Abstract: A laser source assembly for providing an assembly output beam includes a first MIR laser source, a second MIR laser source, and a beam combiner. The first MIR laser source emits a first MIR beam that is in the MIR range and the second MIR laser source emits a second MIR beam that is in the MIR range. Further, the beam combiner spatially combines the first MIR beam and the second MIR beam to provide the assembly output beam. With this design, a plurality MIR laser sources can be packaged in a portable, common module, each of the MIR laser sources generates a narrow linewidth, accurately settable MIR beam, and the MIR beams are combined to create a multiple watt assembly output beam having the desired power.

Abstract: A safe, highly bright projector is to be implemented. A projector directs a light beam from a light source (101) to an image modulating device (105), and magnifies and projects an image formed at the image modulating device (105) through a zoom lens (102). This projector has a light transmitting window (103) movably disposed in front of the surface of the light outgoing side of the zoom lens (102) along the optical axis. The projector further has a window position control unit (108) to control the position of the light transmitting window (103) so as not to change the light beam region that appears on the outer surface of the light transmitting window (103) as the focal length of the zoom lens (102) is varied.

Abstract: A dichroic beam splitter module is disclosed for separating a main pulse laser beam from a pre-pulse laser beam each traversing a common beam path. In one embodiment, two dichroic elements are physically aligned along the beam path and are configured to pass the pre-pulse, a laser light having a first wavelength, to target material located near an irradiation site yet reflect the main pulse, a laser light having a second wavelength. The reflected main pulse is then further reflected by two reflective elements or mirrors from the first dichroic element to the second dichroic element and then on to the irradiation site. In alternative embodiments, the first mirror is deformable to alter beam characteristics of the reflected main pulse beam and the second mirror is adjustable to align the main pulse beam to the irradiation site.

Abstract: A color separating optical system includes a first prism including a second surface for separating an beam into reflected and transmitted beams; and a second prism including a third surface disposed to have an air gap interposed between the third and second surfaces and a fourth surface for separating a beam from the third surface into reflected and transmitted beams. At least one of the second and third surfaces has a multi-layer film, and 0.70<nd×cos ?2A/(?/4)<1.2 is satisfied, where ?2A=sin?1 {(Ng/Nm)sin(?2)}, ? central wavelength in a wavelength range of the beam to be separated by the second prism, nd thickness of an outermost layer of the multi-layer film, Nm refractive index of the outermost layer for the central wavelength, Ng refractive index of a glass material of the second prism for the central wavelength in the wavelength range of color light to be separated, and ?2 apex angle of the second prism.

Abstract: In a particle analyzing apparatus including a capillary for passing through a fluid containing particles to be analyzed, an optical system is employed to collect fluorescent light emitted from particles or substances labeled to the particles with improved collection efficiency preserving resolution of the instrument. The optical system may include a first collection lens attached to the capillary and a first reflection element arranged adjacent to the first collection lens configured to reflect fluorescent light of one or more wavelengths. The optical system may include a second collection lens attached to the capillary and a second reflection element arranged adjacent to the second collection lens configured to reflect fluorescent light of one or more wavelengths.

Abstract: An optical image splitter disposed in the path of image-bearing light along an optical axis has a coated dichroic surface disposed at an angle of 15 degrees or less relative to incident light along the optical axis. The coated dichroic surface has a number of layers of material, the of layers including layers having a first refractive index, nL, and layers having a second refractive index, nH, greater than the first refractive index. The coated surface transmits light of at least a first wavelength range to form a first image at an image plane and reflects light of a second wavelength range to form a second image at the image plane.

Abstract: A metamaterial for separating an electromagnetic wave beam is disclosed. Two kinds of man-made microstructures are attached on a substrate of the metamaterial. The first man-made microstructures each have a principal optical axis parallel to a first electric field direction, and the second man-made microstructures each have a principal optical axis parallel to a second electric field direction. The metamaterial comprises a first region and a second region. The first man-made microstructures in the first region have the largest geometric size and the first man-made microstructures in other regions increase in geometric size continuously in a direction towards the first region; and the second man-made microstructures in the second region have the largest geometric size and the second man-made microstructures in other regions increase in geometric size continuously in a direction towards the second region.

Abstract: A regular pentagonal arrangement of multiple selectively transmitting interfaces provides a beam-splitter and beam combiner in a compact and cost-effective package. The selectively transmitting interfaces are either provided on transparent plates, or alternatively can be external surfaces of a solid transparent prism. One or more of the sides of the regular pentagonal arrangement includes a transparent or absent surface, so that for beam-splitter operation, the input light can be introduced, and for beam combiner operation, the combined light can be emitted. In beam-splitter operation, the input optical beam is introduced through the transparent side, and is sequentially reflected between the plurality of selectively transmitting interfaces, with beams containing the wavelengths corresponding to each of the selectively transmitting interfaces being emitted from the corresponding surface to the outside of the beam-splitter.

Abstract: A system and method for reconfiguring a plurality of electromagnetic beams to take advantage of various wavelength beam combining techniques. The reconfiguring of beams includes individual rotation and selective repositioning of one or more beams with respect to beam's original input position.

Abstract: A method of spatially relaying a first radiation component (1) having a first wavelength and a second radiation component (2) having a second wavelength different from the first radiation component (1), using an optical relaying device (10) which comprises a transparent plate (11) having anti-reflection coatings (12, 13) on both side surfaces thereof, comprises transmitting the first radiation component (1) across the optical relaying device (10) with predetermined incident (a) and emergent angles (?), resp., wherein said anti-reflection coatings (12, 13) being effective for the first radiation component (1) at the incident and emergent angles (?, ?), resp., and reflecting the second radiation component (2) at the optical relaying device (10) with a predetermined reflection angle (a) being equal to at least one of said incident and emergent angles (?, ?), wherein the first and second radiation components (1, 2) are split from each other toward different directions or combined into a common beam path.

Abstract: A method of spatially splitting a primary radiation beam (1) with a first radiation component (2) including an optical wavelength and a second radiation component (3) having a wavelength shorter than the first radiation component wavelength, said second radiation component (3) having a second or higher harmonic wavelength relative to the optical wavelength, comprises directing the primary radiation beam (1) onto a deflection mirror (10) having a reflective mirror surface (12) and carrying a refractive plate element (20), reflecting the first radiation component (2) at the reflective mirror surface (12) and reflecting the second radiation component (3) at an exposed plate surface (22) of the refractive plate element (20), wherein the reflected radiation components (4, 5) travel along different beam paths.

Abstract: A head up display can use a catadioptric collimating system. The head up display includes an image source. The head up display also includes a collimating mirror, and a polarizing beam splitter. The light from the image source enters the beam splitter and is reflected toward the collimating mirror. The light striking the collimating mirror is reflected through the beam splitter toward a combiner. A corrective lens can be disposed after the beam splitter.