Narrow-band selector on the basis of the reflective phase of the three-dimensional hologram |
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IPC classes for russian patent Narrow-band selector on the basis of the reflective phase of the three-dimensional hologram (RU 2035766):
          
 The recording medium for recording the phase of the three-dimensional holograms and a method of manufacturing a three-dimensional phase holograms / 2035764
The invention relates to holography
 The method of registration dvuhantennoy holographic interferogram / 2024821
The invention relates to instrumentation, in particular, to techniques for thermoplastic recording information
 A method of manufacturing a holographic material / 2008716
The invention relates to holography, namely the technology of holographic material
 The processing method of the reflective holograms / 2006894
The invention relates to optical holography
 Diffraction display, diffraction device, method for forming of display and method for forming different diffracted beams / 2256202
Device is used for displaying graphic images. One of variants of its realization includes holographic diffraction picture 100, positioned on constant magnet 120 or element connected to it, and coil or wire 160, through which current is let for moving the magnet. Rotation of holographic diffraction picture relatively to axis 10 forms an image using light, diffracting on holographic diffraction grid. Other variant of realization of display includes faceted rotary element, including facets matrix, each of which contains diffraction grid, and drive, meant for rotation of faceted rotary element from idle position to observation position. Rotation of faceted rotary element leads to forming of image by diffracted light.
 Directing optical signals by means of mobile optical diffraction component / 2256203
Source 70, 72, 74, 76 of optical signals 10 is directed toward mobile optical diffraction component 32. Each optical signal is characterized by its respective wavelength. Mobile optical diffraction component generates output optical signals 92, 94 and distributes them between output devices 88, 90.
 Photopolymer recording media for three-dimensional optical memory for very-large-scale information capacity / 2325680
Invention pertains to organic light sensitive recording media and can be used for making archival three-dimensional holographic optical memory with large scale information capacity. The photopolymer recording medium is described. It consists of solid triplexed polymer films or glass plates and light-sensitive layer between them, including unsaturated compounds, which are capable of ion-radical photopolymerisation; a system providing for photoactivation through radiation in the 400-600nm range and consisting of photochromic compounds and co-initiator. The light sensitive layer contains photochromic compounds with a long mean life of the photo-induced state or thermal irreversible photochromic bonds, and not necessarily, polymer binder, plasticizer and non-polymerisation organic liquid with a large refractive index. There is also proposed usage of such a recording medium in devices for three-dimensional holographic memory of large scale capacity.
 Hologram filter (versions) / 2376617
Hologram filter relates to devices for filtering optical radiation. The filter consists of a transparent substrate, coated with a transparent polymer film which contains a reflection hologram, and a protective layer adjacent to the polymer film. In the first version, the protective layer is in form of an optical wedge, the working surface of which, except the radiation inlet window in the thin part of the wedge, is coated with a reflecting layer. In the second version the filter additionally contains a mirror, placed opposite the reflecting hologram with possibility of varying the angle between the mirror and the hologram. Upon double passage of radiation through the reflecting hologram at different angles of incidence, a narrow spectral peak of the passing radiation is obtained at the output.
 Multipoint ophthalmological laser probe / 2435544
Group of inventions relates to medical equipment, namely, to laser probes and their combinations, applied in ophthalmology. Probe contains irradiating optic fibre for light beam irradiation, optic system, located on the irradiation side of irradiating optic fibre, and two or more receiving optic fibres, located opposite to irradiating optic fibre. Optic system contains diffractive surface. Light beam, irradiated by irradiating optic fibre, is diffracted into two or more diffracted light beams, focused in plane, parallel to diffraction surface. Receiving ends of each of two or more receiving optic fibres, are intended for reception of light beam, diffracted by optic system, are located in plane, parallel to diffraction surface. Another version of implementation is ophthalmologic laser probe, containing irradiating optic fibre and optic system, located on irradiation side of irradiating optic fibre. Optic system is made in the same way as in the previous version. Connection for laser probe contains case, optic system, located in case, first connecting link, located on one side of optic system; and second connecting link, located on the other side of optic system. Optic system contains diffraction surface, each of two or more diffracted light beams is focused in plane, parallel to said surface.
 Devices and methods for data storage / 2459284
Storage device comprises a plastic substrate, having multiple volumes arranged in the form of paths along multiple vertically packaged layers. The substrate demonstrates a non-linear optically sensitive functional characteristic, which is a threshold functional characteristic. The device comprises multiple micro-holograms, every of which is contained in the appropriate one of the volumes. Availability or absence of a microhologram in each of volumes characterises a stored data area.
 Plastic apochromatic lens / 2464600
Lens consists of five components, the first of which is in form of a biconvex lens, the second consists of a negative meniscus whose convex surface faces the object, on which a holographic optical element with optical power equal to 0.005-0.015 times the optical power of the lens is deposited, and a biconvex lens whose larger convex surface faces the object; the third and fourth components are aspherical positive menisci whose convex surfaces face the object; the fifth component is a plane-parallel plate.
 Optical system for holographic video camera / 2464608
Optical system for a holographic video camera includes an optical waveguide with an input holographic element on its surface, a lens, a visible radiation detector, an infrared radiation detector and a photoelectric converter connected to said detectors. The input holographic element is configured to split input radiation into visible and infrared parts. The optical waveguide is configured to transfer the visible part of radiation towards the visible radiation detector and the infrared part towards the infrared radiation detector. The lens is configured to form an image of an object through the optical waveguide and the holographic element on the detector. The photoelectric converter is configured to determine the phase difference between output signals, which are radiation intensity distribution in images obtained from visible and infrared radiation detectors.
 Method of making high radiation brightness laser diode / 2477915
Wide-emitter laser medium which is capable of generating multimode optical radiation is formed, having an active waveguide emitting layer, a first end and a second end. A partially transparent mirror is formed at the second end of the wide-emitter laser medium. The wide-emitter laser medium with a partially transparent mirror is placed on a high thermal conductivity substrate. A device is formed for adjusting the mode structure, which is based on a digital planar hologram, having an input end, said device being formed by forming a digital planar hologram at the first end of the wide-emitter laser medium in optical interaction with said hologram; the digital planar hologram is used as an opaque mirror by placing it on the same substrate as the laser medium, as a result of which an optical cavity is formed, and modes of optical radiation of the laser diode are selected, adjusted and amplified according to a give function.
Recording medium for hologram construction / 2410739
Invention relates to holography. In a recording medium consisting of a polymeric film which is activated by a methylene blue organic dye, the polymeric film used is a biopolymeric film of deoxyribonucleic acid (DNA).
 Device for recording microholograms / 2498380
Device for recording microholograms has the following components: laser source of coherent radiation configured for time modulation of the flux; a source of non-coherent radiation configured for time modulation of radiation flux and operating synchronously with the laser source of coherent radiation; an optical system for dividing the initial beam into a signal beam and a reference beam; an optical system for forming a signal beam and modulation thereof with a calculated image; a spatial light modulator for modulating the signal beam with the recorded image; a Fourier lens configured to focus the incident modulated signal beam coming out of the spatial light modulator in the plane of light-sensitive material; an optical system for forming a reference beam, which performs the function of a reference beam optical delay line, giving the reference beam a shape in the plane of photosensitive material and forming a uniformly bright light field at a given point of the photosensitive material; an optical system for forming radiation from the source of non-coherent radiation, which is configured to convert and direct radiation from the source of non-coherent radiation to a given point; light-sensitive material configured to store the interference pattern of the focused modulated signal and reference beams; a mechanical positioning system which controls mutual arrangement of the light-sensitive material and the rest of the components of the device.
 Sheet of volume hologram for embedding, paper for forgery prevention and map / 2517177
Invention relates to a sheet of volume hologram for embedding, as well as paper and map for forgery prevention, comprising such sheet. The sheet of volume hologram for embedding comprising: a layer of a volume hologram; and a substrate located on only one side surface of the volume hologram layer by using an adhesive agent. Resistance to delamination of the volume hologram layer and the substrate is 25 g.wt./25 mm or more. Paper for forgery prevention comprises the said sheet of volume hologram. The map is a volume hologram sheet located between two sheets.
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(57) Abstract: The invention relates to holography. The inventive band selector on the basis of the reflective phase of the three-dimensional hologram is recorded on the medium with post-exposure increased due to the diffusion movement of molecules, which allows extending the range of spectral selectivity and increase in spectral reflectance. 2 C.p. f-crystals, 1 tab., 4 Il. The invention relates to three-dimensional holography with a deep record, methods of producing high-performance phase holograms and practical implementation of the ideas of holography. The invention can be used for the development of devices for detection and separation of weak laser threads on the broadband background radiation, devices, multi-demuxing in fiber-optic communication lines and create high-resolution spectral devices. Known narrowband holographic spectral selector representing a volume phase hologram recorded in colliding beams [1] on the environment, the basis of which lies reaction sensitized photooxidation of anthracene compounds in the polymer [stacionarnogo energy exchange thick reflective grating is formed with a variable thickness spatial period, resulting in the maximum reflectance selector distant from units not more than 0.7 at a wavelength of recording directly after exposure. The need for impregnation of the recording medium with oxygen prior to recording of the hologram and degassing in the process of fixing impose restrictions on the thickness range selectors, and therefore the range of spectral selectively. The increase in thickness leads to a quadratic increase processing time, which becomes unacceptably high when the thickness is more than 2-3 mm (Fig 1 A). Thin (less than 0.5 mm) samples too quickly lose sensitivity due to release of oxygen. When degassing in the process of fixing due to uneven shrinkage of the polymer is reduced reflectivity of the selector and the broadening of the contour of the spectral and angular selectivity. The real value of the reflection coefficient of such selectors in the process of operation is not more than 0.3 at a wavelength of 532 nm (second harmonic of the Nd-laser) when recording at 514 nm. The drop in reflectivity is also due to the diffusion of paramashiva the compared signal to noise, that is a consequence of the nonlinear amplification of noise recording layer and forming optics in the recording process. There is a method of reducing the intensity of the side maxima in the contour of the angular and spectral selectivity of narrow-band holographic spectral selector, which consists in the fact that the reflective hologram recording in salinopolis layers of the recording medium. Thus it is possible to reduce the intensity of the side maxima in several times. This method has the following disadvantages. Use salinopolis layers reduces the range of application of selectors, in particular because of the large loss absorption it cannot be used at the wavelength of recording. Unable to completely suppress the intensity of the side maxima. The purpose of the invention is to increase the spectral reflectance, the expansion of the range of spectral selectivity and the stability of narrow-band selectors, the total removal of the side maxima in the contours of the spectral and angular selectivity of selectors, increasing the signal-to-noise spectral selectors. In Fig. 1 shows the contours of the spectral selectives is. the contours of the hub selectivity of the holographic selectors recorded on the medium with uniform (3) and diffusion (4) distribution of photochemically active molecules; Fig. 3 presents the increase in the diffraction efficiency of (5) and noise (6) in the process of writing a reflective hologram, and Fig. 4 shows curves of the kinetics of amplification holographic gratings with spatial frequencies of 4500 l/mm (7, 8) and 300 l/mm (9, 10) at a temperature of 50about(8, 10) and 75about(7, 9). The aim is achieved by a holographic spectral selector is recorded on the medium, allowing for post-exposure stress due to diffusive mixing of molecules. In the recording medium on which is recorded a selector, photochemically active molecules are distributed unevenly in thickness due to their diffusion. The record selector is conducted in real time to the effectiveness of not higher than 20% and then by choosing the temperature-time regime, is the selective amplification of the main (high) spatial frequency. P R I m e R 1. Holographic selector, taken as a prototype, made in real time, i.e., direct - ment during exposure of coherent light. The consequence of this mode AOR spatial period). Hence, in turn, stems broadening of the contour of the spectral selectivity (Fig. 1, curve 1) and the fact that the reflection coefficient selector does not exceed the value of 0.7. As the release of oxygen from the polymer in the post-exposure period of the deformation patterns of the selector, which leads to a drop in reflectivity and distortion circuit selectivity [3]In the post-exposure period due to diffusion processes in polymers, which are low molecular organic compounds anthracene and its photoacid forming a reflective hologram, there is a further decrease in the reflectivity of the selector. P R I m m e R 2. Made the selectors on the recording media, representing a solution of quinone compounds in glassy polymer (table). Initial efficiency of the selector also does not exceed 60-70%, However, in the post-exposure period, there is not a drop in the reflectivity, and its growth to values close to unity (Fig. 1, curve 2). The broadening of the circuit occurs when writing to high initial efficiencies. A significant narrowing of the contour of the spectral selectivity of the proposed is shiny. So, for a layer thickness of 30 μm, the half width of the contour of the spectral selectivity was 80 , for 0.5 to 5 mm , 2 mm, 1 to 7 mm to 0.4 . Theoretically limiting restrictions on the possibility of narrowing contour selectivity does not exist, however, in practice, the limitations of the physical parameters of the recording laser technology, namely the coherence length of the recording radiation and divergence of the laser beam. The maximum thickness of the selectors is determined by the solubility of the photoactive components in the polymer, which does not exceed 20 wt. that corresponds to the minimum thickness of 30 μm, which can be obtained reflectance not less than 90% Further reduction in the thickness leads to a decrease of the reflection coefficient of the selector. P R I m e R 3. The selectors made on the recording layer with a uniform distribution of concentration of photoactive compounds (examples 1 and 2), was filmed angular dependence of the reflection coefficient. A characteristic feature of these dependencies is the presence of side maxima (Fig. 2, curve 3 for example 2). A similar pattern holds for the spectral dependence [4] the Presence of side maxima leads to broadening of the real contour of the receiving of the invention, taken as a prototype, was made the selector on the environment phenanthridinone, in which due to the large absorption at the wavelength of recording (transmission layer is less than 20%) the intensity of the side maxima decreased 6 times. P R I m e R 4. Holographic selectors were made on the recording layers, in which the distribution concentration of the photoactive substance substituted or unsubstituted phenanthridinone has the following form. C(x,t) erf+erf where C(x, t) is the current concentration of phenanthrenequinone; WITHaboutits initial concentration; l the original thickness of the recording layer. This distribution is obtained at elevated temperatures due to the diffusion of the working substance from a sample of thickness l with a uniform distribution of the concentration in the adjacent layers of pure polymer. The angular dependence of the reflection coefficient data selectors shown in Fig. 2 (curve 4). The side peaks are practically absent, at least their intensity is reduced by more than three orders of magnitude and does not exceed the noise recording equipment. P R I m e R 5. Recording holograms in real-time to a high diffraction efficiency causes lavinoobraznaya 20%, this effect is negligible (Fig. 3). The diffusion amplification allows obtaining highly efficient selectors to improve the signal-to-noise ratio due to the difference in the rates of growth of gratings of different spatial frequencies (actually selector correspond to frequencies of a few thousand lines per millimeter, and the noise of hundreds of lines). The family kinetics, corresponding to a specific mode of amplification (Fig. 4), it is necessary to choose the time at which the selector managed to strengthen and noise grid no. The reality expressed confirmed by the following considerations: two reflective holograms recorded before the initial efficiency of 15-17% more was spent strengthening the first for 4 days at 50aboutWith, and the second for 20 days at 70aboutC. Efficiency obtained selectors was 91 and 87% and signal-to-noise ratio, respectively, 180 and 30 during the initial 150. The recording of the hologram to the efficiency of 30%, followed by amplification at 50aboutWith (4 days) gave an efficiency of 92% with respect to the signal/noise ratio of 100. 1. NARROW-band SELECTOR ON the basis of the REFLECTIVE PHASE of the three-DIMENSIONAL HOLOGRAM representing a volume reflective phase grating, wherein the selector is performed on the recording medium, extra photoactive compounds. 2. The selector under item 1, characterized in that the selector is performed on the recording layer with diffusion distributed along the thickness of the photoactive compound. 3. The selector under item 1, characterized in that the record selector to the effectiveness of no more than 20% and then by selecting the temperature-time regime produce selective amplification of the lattice core (high) spatial frequency.
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