241 results about "Holographic optical element" patented technology

The invention discloses a concept for improved position and orientation determination of a plurality of objects each marked with at least one optoelectronically detectable marker, in which holographic optical elements are introduced into two-dimensional flat markers, at which ambient light is reflected back with sufficiently high intensity even at high scattering angles relative to the surface normal of the two-dimensional flat markers.For this purpose, it is proposed to detect light reflected by holographic optical elements (HOE; 21, 22, 23) applied to the markers (20) in an optoelectronic sensor (32) and to generate a two-dimensional reflection image, and to detect, in an image processing device (34), on the basis of the spectrally resolved local intensity distribution of the two-dimensional reflection image detected by the optoelectronic sensor (32), differences between the reflection behavior of the optoelectronically detectable markers (20) of the current position and orientation of the plurality of objects (100; 200) and the reflection behavior of the optoelectronically detectable markers (20) in a reference configuration of the plurality of objects (100; 200), and to detect deviations in the overall configuration of the plurality of objects (100; 200) relative to the optoelectronic detection device (30) by evaluating the detected differences. determine.

The invention discloses a thiophene monomer, a holographic recording medium, a preparation method and a related device, the structural general formula of the thiophene monomer is shown in the specification, the refractive index of the monomer is larger than 1.8 and smaller than 1.9, the diffraction efficiency can be remarkably improved, the thiophene monomer is applied to preparation of a photopolymer type holographic recording medium, and the photopolymer type holographic recording medium with the sensitivity larger than 100 cm / mJ can be obtained. According to the holographic recording medium, the diffraction efficiency of the recording grating is larger than 95%, the refractive index modulation degree is larger than 0.1, and the shrinkage rate is lower than 1%, and further, the holographic recording medium can be used for preparing a volume holographic grating, a holographic optical element and an optical device.

The invention discloses a (methyl) acrylate monomer, a holographic recording medium, a preparation method and a related device.The structural formula of the (methyl) acrylate monomer is as shown in G1-G19. The preparation method is easy to operate and high in synthesis yield, and further, the holographic recording medium can be applied to holographic recording. According to the photopolymer holographic recording medium, the (methyl) acrylate monomer with the structure is introduced into the photopolymer holographic recording medium, so that the holographic recording medium with high sensitivity, high diffraction efficiency and no yellowing is obtained, and the invention further provides a preparation method of the holographic recording medium. The invention also provides a volume holographic grating, a holographic optical element and an optical device comprising the holographic recording medium.

The invention discloses a thianthrene monomer, a holographic recording medium, a preparation method and a related device, the structural formula of the thianthrene monomer is shown as G1-G6, the refractive index of the thianthrene monomer is larger than 1.7 and smaller than 1.8, the diffraction efficiency can be remarkably improved, and further, the holographic recording medium can be applied to holographic recording. The thianthrene monomer with the structure is introduced into the photopolymer type holographic recording medium, so that the holographic recording medium with high sensitivity, high diffraction efficiency and high refractive index is obtained, and the invention further provides a preparation method of the holographic recording medium. The invention also provides a volume holographic grating, a holographic optical element and an optical device comprising the holographic recording medium.

The invention discloses a (methyl) acrylate monomer, a holographic recording medium, a preparation method and a related device.The structural formula of the (methyl) acrylate monomer is as shown in G1-G5. The preparation method is easy to operate and high in synthesis yield, and further, the holographic recording medium can be applied to holographic recording. The (methyl) acrylate monomer with the structure is introduced into the photopolymer type holographic recording medium, reverse migration of a short polymer chain can be effectively inhibited, and therefore the holographic recording medium with high sensitivity and high diffraction efficiency is obtained, and the invention further provides a preparation method of the holographic recording medium. The invention also provides a volume holographic grating, a holographic optical element and an optical device comprising the holographic recording medium.

The utility model provides a light and small laser wind-finding radar device for an aerostat platform, and the device comprises a laser light source which is used for generating a pulse light beam with preset energy and preset frequency; the transmitting-receiving optical system comprises a step-shaped wedge mirror or a holographic optical element, is arranged on an emergent path of the pulse light beam and is used for transmitting the pulse light beam according to a forward conical scanning mode and receiving an echo signal of the pulse light beam; and the laser detector is arranged on an incident path after the echo signal passes through the transceiving optical system, and is used for detecting the echo signal to obtain the frequency shift of the echo signal.

The invention discloses an ARHUD and holographic instrument fused man-machine interaction system and an automobile, and relates to the field of automobiles, in the imaging process of an imaging system, a first light beam and a second light beam carrying different projection information are generated through an image generation unit, and then the second light beam is diffused through a diffusion element; then the first light beam and the second light beam are projected to a first position and a second position through a reflector assembly, the first light beam projected to the first position forms a real image under the action of a holographic optical element, and projection information carried by the first light beam is displayed through the real image. And the second light beam projected at the second position forms a long-range virtual image in front of the windshield, and projection information carried by the second light beam is displayed through the long-range image. According to the scheme, display of two paths of projection information can be completed only by adopting one holographic optical element and one set of optical transmission system, and the ARHUD and holographic instrument fused man-machine interaction system is simple in structure and smaller in size.

The invention discloses a dendritic (methyl) acrylate monomer, a holographic recording medium, a preparation method and a related device. Wherein the structural formula of the dendritic (methyl) acrylate monomer is shown as G1-G12, the preparation method of the dendritic (methyl) acrylate monomer is simple and easy to operate, and further, the dendritic (methyl) acrylate monomer with the structure is introduced into the photopolymer type holographic recording medium, so that the photopolymer type holographic recording medium is prepared. The invention further provides a preparation method of the holographic recording medium, a volume holographic grating containing the holographic recording medium, a holographic optical element containing the holographic recording medium and an optical device containing the holographic recording medium.

The invention discloses a 4, 4 '-bis (omega-alkenyl thioether) diphenyl sulfide monomer and a preparation method, the structural general formula of the 4, 4'-bis (omega-alkenyl thioether) diphenyl sulfide monomer is shown in the specification, n represents the number of methylene and is a positive integer, n = 1-10, the refractive index of a polymer obtained after the monomer and 4 '4-dimercapto diphenyl sulfide are polymerized is larger than 1.65 and smaller than 1.8, diffraction efficiency is remarkably improved, the preparation method is easy to operate, and the preparation method is suitable for industrial production. The invention further provides a photopolymer type holographic recording medium containing the monomer and a preparation method of the photopolymer type holographic recording medium, the sensitivity of the holographic recording medium is larger than 100 cm / mJ, the diffraction efficiency of a recording grating is larger than 95%, the refractive index modulation degree is larger than 0.1, the shrinkage rate is lower than 1%, and the preparation method is simple, controllable and suitable for industrial production. The invention also provides a volume holographic grating containing the holographic recording medium, a holographic optical element and an optical device.

The purpose of the present invention is to provide an image projection device that makes it possible to project a plurality of images while suppressing an increase in the number of components of a projection optical member and achieving a reduction in the size of the optical member.　This image projection device (100) projects a projection image onto a display part (WS) for displaying virtual images (P1, P2), and comprises: an image emitting unit (10) that emits first image light, which is circularly polarized light of a first rotation direction, and second image light, which is circularly polarized light rotating in a reverse direction to the first rotation direction; a first polarization holographic optical element (50) that has a refractive index distribution which varies with the polarization direction; a projection optical unit (30) on which the first image light and the second image light are incident via the first polarization holographic optical element (50), and that projects the first image light and the second image light onto the display part (WS); and a multiplexing member (20) that multiplexes the first image light and the second image light at the position of the first polarization holographic optical element (50).

The invention discloses a dithiocarbamate monomer, a holographic recording medium, a preparation method and a related device, the structural general formula of the monomer is as shown in G1 and G2, R1 represents any one of hydrogen, halogen and C1-C4 alkyl, R3 represents any one of hydrogen, halogen and C1-C4 alkyl, A1 represents C1-C4 alkyl, A2 represents hydrogen or methyl, n is a positive integer, and n = 1-10. The dithiocarbamate monomer provided by the invention has high refractive index, and the holographic recording medium with high sensitivity, high diffraction efficiency and high refractive index modulation degree can be obtained by applying the dithiocarbamate monomer to preparation of the photopolymer holographic recording medium; holographic recording media can be used to prepare volume holographic gratings, holographic optical elements, and optical devices.

The utility model provides a double head-up display fusion imaging system, which relates to the field of automobiles, and generates a first light beam and a second light beam carrying different projection information through an image generation unit, and adopts a diffusion element to carry out uniform light diffusion on the first light beam and the second light beam. The diffused first light beam is projected to a first position of the windshield by adopting the reflector assembly, the diffused second light beam is projected to a second position of the windshield, the light beam projected to the first position generates a diffraction effect under the action of the holographic optical element, and a close-shot image is formed in front of the windshield; the light beam projected at the second position forms a long-shot image in front of the windshield so as to display the long-shot image information carried by the second light beam. In the imaging system, only one holographic optical element and one set of optical transmission system are needed to complete display of two paths of projection information, and the system is simple in structure and smaller in size.

The invention discloses a multi-focal near-to-eye display holographic optical element and a preparation method and device thereof. The element adopts a composite structure of a substrate, a multi-focal correction layer and a holographic recording layer, a holographic grating accurately matched with each optical partition of the correction layer is formed in the recording layer through a partition exposure technology, and multi-depth virtual image display and user refraction correction functions can be realized at the same time. The preparation device comprises a coherent light source, a beam splitter, a diffusion plate, a focal plane displacement system, a mask component and a master controller, and partition exposure is realized through cooperative control. The problem that traditional near-to-eye display cannot meet multi-focus display and refraction correction at the same time is solved, a user can clearly perceive fused multi-depth virtual information and a real environment without additionally wearing glasses, the visual comfort and experience are remarkably improved, and the method is suitable for AR / VR and other head-mounted display devices.

To provide a photosensitive composition capable of further improving diffraction characteristics.The present technology provides a photosensitive composition including: at least a compound represented by the following general formula (1); a binder resin; and a photoinitiator.In the general formula (1), X1 represents an oxygen atom, a nitrogen atom, a phosphorus atom, a caron atom, or a silicon atom.Y1 and Y2 each represent a benzene ring or a naphthalene ring, and both Y1 and Y2 do not represent benzene rings.R1 to R3 each represent a hydrogen or a substituent group represented by *—Z1(R4)d (* represents a bonding site).Z1 represents a single bond, a saturated hydrocarbon group having a valence of 2 or higher, or an unsaturated hydrocarbon group having a valence of 2 or higher, and the saturated hydrocarbon group or the unsaturated hydrocarbon group may have an ether bond and / or a thioether bond.R4 represents a hydrogen or a polymerizable substituent group.

The invention relates to the field of eye movement tracking, and provides an eye movement tracking device and method and near-eye display equipment, and the eye movement tracking device comprises a light source assembly which is used for providing a reproduction light beam; the holographic optical element is used for reproducing an illumination light beam under the irradiation of the reproduction light beam; and the camera shooting assembly is used for acquiring a target image formed by a first reflection light beam obtained by reflecting the illumination light beam through human eyes so as to realize eye movement tracking according to the target image. The holographic optical element is irradiated through the reproduction light beam provided by the light source assembly, so that the holographic optical element reproduces the illumination light beam, and the target image formed by the first reflection light beam obtained by reflecting the illumination light beam through the human eye is obtained through the camera shooting assembly, so that the illumination light source or the camera shooting assembly is prevented from being arranged at the position opposite to the human eye; the eye movement tracking device is prevented from blocking the human eyes, and the visual area of the human eyes is increased.

The invention relates to a display device (10) for providing a dual display and a motor vehicle (36) with such a display device (10).The display device comprises first pixel units (12) for providing a first display signal (20); second pixel units (14) for providing a second display signal (14); and first and second holographic optical elements (28, 30); wherein the first and second pixel units (12, 14) are arranged in a predetermined pattern on a display layer (24); wherein the holographic optical elements (28, 30) are arranged in a deflection layer (26) in front of the display layer (24); wherein the first holographic-optical elements (28) are assigned to the respective first pixel units (12), which are designed to deflect the first display signal (20) into a first spatial region (32), and the second holographic-optical elements (30) are assigned to the respective second pixel units (14), which are designed to deflect the second display signal (22) into a second spatial region (34) which is different from the first spatial region (32).

Interlayers that exhibit superior properties and that provide desirable optical properties when incorporated into laminates, such as windshields, windows or other glazings containing a holographic optical element (HOE) are disclosed. The interlayers, when used in a laminate in conjunction with the HOE film, maintain and do not detract from the HOE film properties.

Different examples relate to techniques in order to actively or passively stabilize the temperature of a holographic optical element. To this end, heat-conducting elements, e.g. silver nanowires or carbon nanotubes, are provided.

In some implementations, a method for authenticating and classifying a set of materials comprises: transmitting a visible range light from a light source toward a vessel containing a material sample; wherein the visible range light passes through the vessel containing the material sample, passes through the material sample, and bounces off a HOE located at a bottom of the vessel toward a camera implemented in a smartphone; receiving, by the camera of the smartphone, the visible range light that bounced off the HOE; based on a mapping of each of the visible range light onto an area of an image sensor, generating a holographic optical element that has a plurality of regions, that receives input light reflected or transmitted through a new material, and that filters the input light to a filtered light by each characteristic light spectra, and mapping the filtered light onto the image sensor's area.

The present disclosure relates to an ophthalmic lens for a wearable head-up display, the ophthalmic lens comprising: an optical center, a primary gaze axis, and a holographic optical element having an apex wherein the holographic optical element is integrated with the ophthalmic lens such that the apex coincides with an image viewing axis to allow viewing of digital content, and wherein the optical center of the lens is positioned relative to the primary gaze axis and the apex is positioned relative to the optical center. Also disclosed is a wearable display comprising an eyeglass lens mounted in the frame, an eyeglass frame, and an image source mounted on an arm of the frame adjacent to the eyeglass lens to project light onto a holographic optical element of the eyeglass lens to generate one or more image eyespots.

The invention discloses a dielectric computer-generated holographic optical element based on electrochemical nanoimprint and a preparation method thereof, and the method comprises the steps: carrying out the optimization design of the parameters of a unit structure of the dielectric computer-generated holographic optical element through numerical simulation, and obtaining an optimal parameter combination; obtaining a target hologram and a phase distribution diagram corresponding to the target hologram, determining an optimal parameter corresponding to the phase distribution diagram, and obtaining an arrangement diagram of a unit structure of the corresponding dielectric computer-generated holographic optical element; preparing a metalized template; providing a dielectric material substrate; based on a metalized template and a dielectric material substrate, a nano cavity structure complementary with the structure of a nano column in the metalized template is generated in the dielectric material substrate by adopting an electrochemical nano imprinting technology, and a three-dimensional micro-nano structure with a periodic unit structure array is formed. And obtaining the dielectric computer-generated holographic optical element corresponding to the target hologram. According to the invention, high-fidelity copying of the three-dimensional nanostructure can be realized.

The invention discloses an optical monomer, a holographic recording medium, a preparation method and a related device, the structural general formula of the optical monomer is as shown in G1-G6, the monomer is high in refractive index, the preparation method is simple, and further, the optical monomer with the structure is introduced into the photopolymer type holographic recording medium, so that the photopolymer type holographic recording medium is prepared. The invention further provides a preparation method of the holographic recording medium, a volume holographic grating containing the holographic recording medium, a holographic optical element containing the holographic recording medium and an optical device containing the holographic recording medium.

The invention discloses a near-infrared photosensitive initiation system, a photopolymer type holographic recording medium, a holographic optical element and display equipment, and the photopolymer type holographic recording medium comprises film-forming resin, a writing monomer, the near-infrared photosensitive initiation system, a chain transfer agent, a catalyst and an additive, the film-forming resin comprises a compound with a plurality of isocyanate reactive functional groups and a polyisocyanate group compound, and the near-infrared light-sensitive initiation system comprises a near-infrared light-sensitive dye and a co-initiator. In this way, monomer polymerization can be efficiently initiated, the material cost is low, and the holographic recording performance of the photopolymer is effectively improved.

A holographic photopolymer material, a holographic photosensitive film, a holographic optical element, and a display device, wherein the holographic photopolymer material includes a polymer matrix, photopolymerizable monomers, and a photosensitizer. An index of refraction of the photopolymerizable monomer is greater than an index of refraction of the polymer matrix. A molecular structure of the polymer matrix includes a linear structure, and branch chains of the polymer matrix include activation groups; and / or the molecular structure of the polymer matrix includes a crosslinked structure.

This application discloses a holographic material and its preparation method, a holographic optical element, a holographic device, and a method for preparing a volume holographic grating. The method for preparing the holographic material includes: providing a blocked polyisocyanate, a first compound, a polymerizable monomer, a photoinitiator, and other additives; and mixing the blocked polyisocyanate, the first compound, the polymerizable monomer, the photoinitiator, and the other additives uniformly under light-protected conditions to obtain the holographic material. This method allows for the pre-mixing and long-term storage of second-order holographic materials, control of first-order reactions, and improvement of the overall volume holographic grating preparation process.

The invention discloses a concept for improved time-resolved location and / or position determination of an object marked with several optoelectronically detectable markers, in which holographic optical elements are introduced into two-dimensionally planar markers, at which ambient light is reflected back with sufficiently high intensity even at high scattering angles relative to the surface normal of the two-dimensionally planar markers.For this purpose, it is proposed to detect light reflected by holographic optical elements (HOE; 21, 22, 23) applied to the marker (20) in an optoelectronic sensor (32) and to generate a temporal sequence of two-dimensional reflection images, and to determine in an image processing device (34) a time-resolved position and / or orientation of the object relative to the optoelectronic detection device (30) or the environment marked with detectable markers (20) by evaluating the spectral and local intensity distributions in the two-dimensional reflection images detected by the optoelectronic sensor (32).

Holographic photopolymer materials, holographic photosensitive films, holographic optical elements, and display devices are provided. The holographic photopolymer material comprises a polymer matrix, a photopolymerizable monomer, and a photosensitizer. The refractive index of the photopolymerizable monomer is greater than that of the polymer matrix. The molecular structure of the polymer matrix includes a linear structure, the branched chains of the polymer matrix include activating groups, and / or the molecular structure of the polymer matrix includes a crosslinked structure. Because polymer matrices with a crosslinked molecular structure have a high glass transition temperature, holographic photopolymer materials have good heat resistance. Because holographic photopolymer materials with a linear molecular structure include activating groups that can form crosslinked structures, optical elements made from holographic photopolymer materials can have crosslinked structures, i.e., optical elements can have good heat resistance. Holographic photopolymer materials have good heat resistance, or optical elements made from holographic photopolymer materials can have good heat resistance.

Various examples relate to techniques for the synchronized controlling of a multicolor light source and a multipixel display device of a picture generating unit for a transparent screen unit, e.g. a head-up display system. This allows chromatic aberrations to be reduced, e.g. chromatic aberrations occurring due to the use of holographic optical elements.

The embodiment of the invention belongs to the technical field of holographic optical elements, and provides a preparation parameter determination method of a holographic optical element, and the method comprises the steps: obtaining a plurality of pieces of detection data of an optical holographic element in a target use scene, the detection data are detection data in a user eye box range obtained through simulation parameters in a target use scene, and Bragg grating periods of the holographic optical elements corresponding to any two simulation parameters in the plurality of simulation parameters are different; in the multiple pieces of detection data, multiple pieces of target detection data without rainbow patterns within the range of the eye box of the user are determined; and determining a plurality of preparation parameters of the holographic optical element according to the target simulation parameters corresponding to the plurality of target detection data. Therefore, the preparation parameters without the rainbow patterns in the target use scene can be determined, so that the holographic optical element obtained according to the preparation parameters does not have the rainbow patterns in the use process, and the user experience is improved.

The present application relates to a kind of color holographic optical elements and its manufacturing method, manufacturing system and correction method, which can solve the problem of focal shift caused by wavelength inconsistency, help to improve the quality of reproduced image.The correction method of the color holographic optical element includes the following steps: adjusting the central ray incidence angle of various color recording light according to the wavelength of color recording light and the wavelength of color reproduction light, to correct the lateral focal shift of color holographic optical element in the process of image reproduction;And adjusting the edge ray incidence angle of various color recording light according to the wavelength of color recording light and the wavelength of color reproduction light, to correct the axial defocus of color holographic optical element in the process of image reproduction.