Plastic apochromatic lens |
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IPC classes for russian patent Plastic apochromatic lens (RU 2464600):
       
 Objective lens with variable focal distance for operation in two infrared spectral regions / 2463633
Objective lens consists of a first fixed positive component, a second movable negative component, a third movable positive component, a fourth fixed positive component and a fifth fixed negative component. The first, third, fourth and fifth components are in form of menisci whose concave surfaces face the image plane. The second component is in form of a single biconcave lens. The first and fifth components are made from optical germanium with refraction index n=4. The second and fourth components are made from material with refraction index n2=n4=2.44 and the third component is made from material with refraction index n=2.78. The concave outer surfaces of the first and fourth components are aspherical. Radii of curvature of the surfaces of the objective lens and thickness of the first and fifth components satisfy relationships given in the claim.
 High-aperture wide-angle objective lens for infrared spectrum / 2434256
Objective lens comprises five meniscus lenses with spherical surfaces and an aperture diaphragm between the fifth meniscus lens and the focal plane. The first and third meniscus lenses face the object space with their convex surface. The second, fourth and fifth meniscus lenses face the object space with their concave surface. The first and fourth meniscus lenses are made from germanium, while the second, third and fifth are made from monocrystalline silicon. The second meniscus lens has the longest diameter. Optical power values φ1-φ5 of the first-fifth meniscus lenses satisfy the following conditions: (0.62<φ1<0.66), (0.16<φ2<0.20), (0.18<φ3<0.22), (0.35<φ4<0.39), (0.30<φ5<0.34). The distance between the meniscus lenses is equal to D·f, where D is a coefficient, f is the focal distance of the objective lens. The coefficients satisfy the following conditions: (5.0<D1-2<6.0), (0.15<D2-3<0.25), (0.85<D3-4<0.95), (1.3<D5-AD<1.5). The conditions (3.5γ<⌀2<4.0γ) and ⌀1<⌀2 are satisfied, where ⌀1 and ⌀2 are the diameter of the input and output meniscus lenses, γ is the dimension of the diagonal of the photodetector matrix. The position of the aperture diaphragm coincides with the exit pupil of the objective lens.
 Projection lens / 2433433
Projection lens has an entrance pupil and five components placed in series on the path of optical radiation from the object to the image. The first component is divergent, faces the object with its concave surface and consists of glued diverging- and converging-meniscus lenses. The second component is a converging-meniscus lens whose concave surface faces the object. The third is a biconvex lens. The fourth component is a converging-meniscus lens whose concave surface faces the image. The fifth component is divergent, faces the image with its concave surface and consists of glued biconvex and biconcave lenses.
 Objective lens for visible and near infrared spectrum / 2421764
First component has on the beam path a biconvex lens 1 whose more convex surface faces the object space, a positive meniscus 2 whose convex surface faces the object space, and a biconcave lens 3 whose more gentle surface faces the object space. The second component is in form of biconvex lens 4 whose more gentle surface faces the image space. The third component is in form of a plane-concave lens 5 whose flat surface faces the image space. The refraction index of lenses 1, 2 and 4 is greater than 1.65, and that of lens 3 is not less than 1.8 and that of lens 5 is equal to approximately 1.5. The aperture diaphragm lies on the concave surface of the third lens of the second component. The second component can be displaced along an optical axis.
 Large-aperture lens / 2396581
Lens consists of four components. The first component is made from separate biconvex and concave-plane lenses. The second component is a separate convex-plane lens whose flat side faces the image. The third component is a positive lens made from a biconvex and a biconcave lens. The fourth component is a positive meniscus whose concave side faces the image and whose radius of curvature of the convex surface is greater than the radius of curvature of the concave surface. In the first component, the modulus of the radius of curvature of the second surface of biconvex lens is greater than the radius of curvature of the first surface of the concave-plane lens. Each biconvex lens is symmetrical. The refraction index of the fourth component is greater than 1.64 and less than 1.9 for line e. The refraction index of the biconvex lens of the fourth component is greater than 1.56 and less than 1.63 for line e and is less than the refraction index of the biconvex lens of the first component. The following condition is satisfied: 0.5f' <d4<f', where: f' is focal distance of the lens; d4 is distance between the first and second components.
 Optical system with remote apertures for infrared spectrum / 2386156
Optical system has an objective lens which constructs real intermediate image, a projection objective lens which inverts the image, and an aperture diaphragm lying between the projection objective lens and the image plane. The objective lens has a positive meniscus whose convex surface faces the object space and a biconcave lens. The projection objective lens has three menisci lying close to each other. The first and third menisci are positive and their convex surfaces face each other. The second meniscus is negative and its concave surface faces the image plane. All refracting surfaces are spherical. Relationships given in the formula of invention hold in the system.
 High-aperture wide-angle lens for infrared spectrum (versions) / 2385475
Objective has a first negative meniscus whose convex surface faces the object space, a second positive lens, a third negative meniscus whose concave surfaces faces the object space, a fourth positive lens and a fifth positive meniscus whose concave surface faces the image plane, and an aperture diaphragm. In the first version the aperture diaphragm lies between the fifth meniscus and the image plane, the second lens is a meniscus whose concave surface faces the image plane, and the fourth lens is biconvex. The lenses have relative optical power of (0.20-0.26), (0.16-0.26), -(0.12-0.15), (0.12-0.15), (0.15-0.20) respectively. The distance between the first and second lenses is not greater than 12 times the focal distance of the objective. In the second version the aperture diaphragm lies between the second and third lenses, the second lens is biconvex and the fourth is a meniscus whose convex surface faces the fifth lens. The lenses have relative optical power of -(0.24-0.28), (0.24-0.28), -(0.12-0.15), (0.12-0.15), (0.15-0.20) respectively. The distance between the first and second lenses is not greater than 9 times the focal distance of the objective.
 Large-aperture lens / 2384869
Large-aperture lens can be used in night vision devices. The large-aperture lens has a positive and a negative meniscus along the beam path whose convex sides face the object side, an aperture diaphragm, a negative component made from a biconcave and a biconvex lens glued together, a biconvex lens and a positive meniscus whose concave side faces the image. The focal distance of the lens, radii of certain surfaces, thickness of the second meniscus, the Abbe number and refraction indices of the last three elements are related through expressions given in the formula of invention.
 High-aperture lens with offset pupils for infrared area of spectrum / 2379723
Lens may be used in optical systems of infrared imagers. Lens comprises the first, second and third positive components arranged along travel of beams and including five lenses, and aperture diaphragm between the third component and plane of image. Between the first and second components there is cavity of intermediate image arranged. The first component comprises one meniscus, the second and third ones comprise two menisci each. Refracting surfaces of all menisci are arranged as spherical. Positive meniscus of the first component and the second positive meniscus of the third component are inverted with their concavity to plane of images. In the second component the first positive meniscus is inverted with its concavity to space of objects, and the second negative meniscus inverted by its concavity to space of images is tightly adjacent to it. Between optical forces of components and menisci, ratios given in formula of invention are realised between components and focus distance of lens.
 High-aperture lens / 2377619
Lens can be used for forming an image on a CCD matrix. The lens includes power and correction components. The power component contains a positive double-glued lens, a negative meniscus, whose concave surface faces the object space and a lens made from a biconcave and a biconvex lens stuck together, and a single positive meniscus, whose concave surface faces the image space. The correction component contains a single positive meniscus, whose concave surface faces the image space, and a biconcave lens. The distance between the negative and positive meniscuses of the power component is not less than 0.3 of the focal distance of the lens. The single positive meniscus of the power component is made from material with Abbe number greater than 81. The sum of optical power of the power and correction components does not exceed 0.004 mm-1.
 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.
 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.
 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.
 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.
 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.
 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.
 The method of recording a holographic diffraction grating in the volume of a photosensitive material (options) / 2199769
The invention relates to optics and can be used to create optical filters
 A method of manufacturing a holographic diffraction gratings / 2165637
The invention relates to holography and can be used for holographic protection of industrial goods and securities, optical instrumentation, laser technology, optoelectronics
Objective lens with variable focal distance for operation in two infrared spectral regions / 2463633
Objective lens consists of a first fixed positive component, a second movable negative component, a third movable positive component, a fourth fixed positive component and a fifth fixed negative component. The first, third, fourth and fifth components are in form of menisci whose concave surfaces face the image plane. The second component is in form of a single biconcave lens. The first and fifth components are made from optical germanium with refraction index n=4. The second and fourth components are made from material with refraction index n2=n4=2.44 and the third component is made from material with refraction index n=2.78. The concave outer surfaces of the first and fourth components are aspherical. Radii of curvature of the surfaces of the objective lens and thickness of the first and fifth components satisfy relationships given in the claim.
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FIELD: physics. SUBSTANCE: 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. EFFECT: significant improvement in image quality, higher aperture ratio and reduced total length of the lens. 3 cl, 4 dwg, 2 tbl
The invention relates to the optical instrument and can be used as a lens digital cameras mobile phones or mass of cameras operating in the mode "day-night", i.e. in the spectral range covering the visible and near infrared ranges. In several patents, for example SU 1151905 (A1) (USSR, publ. 23.04.1985), EN 2244330 (C2) (Russian Federation, publ. 10.01.2005), with the purpose of correcting chromatic aberrations and improve image quality on one of the surfaces of the lens caused hologram optical element, but its parameters and correlation with other parameters of the lens elements is unacceptable for the case of lenses of this class. Known pathcomponent lenses are described, for example, in patents JP 2000193884 (A) (Japan, publ. 14.07.2000), JP 2001100092 (A) (Japan, publ. 13.04.2001)US 2006024038 (A1) (USA, publ. 2.02.2006). The disadvantages of these lenses can be attributed to a narrow spectral range, a small relative aperture, quite long and the poor quality of the image. The closest analogue to the claimed technical solution is the lens patent US 2006056068 (A1) (USA, publ. 16.03.2006), adopted by the authors for the prototype. This pathcomponents lens, operating in the visible spectral range (λF=0,486 μm to λC=0, 656 μm), all e the elements of which are made of plastic and have an aspherical surface, when the relative aperture of 1:2.8, focal length f'=5,98 mm, angular field in space objects 2ω=55,99° provides a resolution of 100 mm-1in contrast T≥0,4. The total length of the system (from the first component to the image plane) is l=8,0 mm The objective of the invention is to provide a lens operating in the extended spectral range from λmin=0,4 μm to λmax=0.9 µm and forming a high-quality image across the field, with a larger relative aperture 1:2,4, angular field in space of the objects to 2ω=60° and reduced total length l≤5 mm To solve this problem is proposed plastic lenses lens apochromat, containing five components (Figure 1), the first of them is made in the form of a lenticular lens facing less convex to the object, the second component consists of a negative meniscus facing convex surface to the object, which is applied to a hologram optical element of the optical power 0,005-0,015 optical power of the lens and the lenticular lens facing more convex to the object, the third and fourth positive components represent aspherical meniscus which is convex to the object, the fifth component is a plane-parallel plate. The first, third and fourth components the options lens made of polymethyl methacrylate, a negative meniscus second component is made of polycarbonate, and a biconvex lens made of polymethyl methacrylate. The essence of the invention is that a significant improvement in image quality is achieved by replacing the second component of the prototype, made in the form of a biconcave lens component consisting of a negative meniscus facing convex surface to the object, which is applied to a hologram optical element, and a lenticular lens facing more bulge to the subject. This component as a component of the prototype, has a negative optical power. Thus the characteristic equation of the hologram element has the form
where Ai- coefficients; r is the height on the surface of the hologram optical element, and the coefficient And1proportional to the optical power of hologram optical element, and the coefficients And2And3... , And6proportion to the respective coefficients of spherical aberration of the lens components. Thus, in the inventive plastic lenses the lens apochromat achieved the above technical result is obtained comprehensive correcting the monochromatic and chromatic aberrations of axial and off-axis beams, h is about leading to significant improvements in image quality across the field. The invention is illustrated by drawings: - Fig 1. Principal optical scheme of the plastic lenses of the lens - Fig 2. Longitudinal chromatism - Fig 3. Distortion - Fig 4. Polychromatic frequency-contrast characteristics of the lens And tables 1-2, which presents the design parameters of the example of a specific implementation. The data tables presented in the format of optical ZEMAX simulation. As an example of specific performance features plastic lenses lens apochromat with the rear focal length f≈3.7 mm; relative aperture 1:2,4; angular field in space objects 2ω=60°. Technical specifications: Focal length f≈3,7 mm Relative aperture 1:2,4. Angular field in space objects 2ω=60°. The back focal segment The total length of the system l=4,84 mm Does the lens as follows: light beams emanating from the object located at infinity, consistently pass the components 1-5 optical system to form an image in the plane of best installation, coinciding with the paraxial image plane. Received distribuye plan-apochromat with the relative aperture 1:2,4 provides resolution 115 mm-1if to the trust not less than 0,5 within the field angle 2ω≤60°. The residual chromatism in the range of λmin=0,4 μm to λmax=0,9 μm does not exceed of 5.2 μm and a modulus of distortion - less than 1%.
1. The lens contains five components, the first of them is made in the form of a biconvex lens, the second negative component, the third and fourth positive components, which represents an aspherical meniscus which is convex to the object, the fifth component is a plane-parallel plate, wherein the second component consists of a negative meniscus facing convex surface to the object, which is applied to a hologram optical element of the optical power 0,005-0,015 optical power of the lens and the lenticular lens facing more convex to the object, while the characteristic equation of the hologram element is 2. The lens according to claim 1, characterized in that the first, third, and fourth to mponent made of polymethylmethacrylate. 3. The lens according to claim 1 or 2, characterized in that a negative meniscus second component is made of polycarbonate, and a biconvex lens made of polymethyl methacrylate.
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