Method for centering lens in rim and rim therefor

FIELD: physics.

SUBSTANCE: method involves installing the lens on a flat support flange of a cylindrical hole in the intermediate portion of the rim, which is placed by the flange on the support flange of the cylindrical hole in the main rim. The rim is rotated around its base axis, the runout of the center of curvature of the first lens surface is measured relative to the center of curvature of the second lens surface, the lens is moved radially on the flat support flange of the intermediate part of the rim to align the centers of curvature of the first and the second working surfaces of the lens, and the lens is fixed in the intermediate part of the rim. The runout of the centers of curvature of the first and the second surfaces with the axis of rotation is measured, the intermediate part of the rim is shifted to the support flange of the main rim for combining the centers of curvature of the first and the second surfaces with the axis of rotation and the position of the intermediate part of the rim is fixed in the main rim. The rim has an external cylindrical base surface and a flat external base flange which form the reference axis of the rim, an internal cylindrical opening with a flat support flange in which the intermediate cylindrical part is inserted with an increased seating clearance, the said intermediate cylindrical part having a flat support flange for mounting the lens.

EFFECT: increasing the accuracy of centring the lens while maintaining centring on both working surfaces of the lens and simplifying the manufacturing of the main rim.

6 cl, 5 dwg

 



 

Same patents:

FIELD: instrument making.

SUBSTANCE: in a device for fixation and adjusting displacements of an optical part, consisting of a unit of optical part fixation, mechanisms of linear displacement and mechanisms of angular rotations of the optical part fixation unit, mechanisms of angular rotations are installed so that axes of angular rotations are perpendicular and cross in one point, at the same time the unit of the optical part fixation is installed in the device with the possibility of displacement, providing for combination of the optical part top with the point of angular rotations mechanisms axes crossing.

EFFECT: improved efficiency and accuracy of alignment, which is provided due to the fact that displacement units in process of the optical part alignment have independent angular and linear displacements.

5 dwg

FIELD: electricity.

SUBSTANCE: fixing device of the first instrument (E1) in relation to the second instrument (E2) has the design containing rigid central body (CC) and two essentially identical end bodies (CTi), continued ends of the above central body (CC), each of which contains rigid inner part (PIi) representing the first expansion symmetrical relative to symmetry element, rigidly attached to one of the ends of central body (CC), constriction continuing the above inner part (PIi) and forming flexible intermediate part (PDi) symmetrical relative to the above symmetry element, rigid external part (PEi) continuing the above constriction and representing the second expansion symmetrical relative to the above symmetry element and intended for rigid connection to the first (E1) or the second (E2) instrument. At least two piezoelectric transducers (Tij) installed in free spaces (Si) restricted with inner (PIi) and outer (PEi) parts of two end bodies (CTi), each of which is designed for transducing either axial dimensional change to measuring current characterising the amplitude of the above change, or control current to the appropriate axial dimensional change; and control means (MC) having the possibility of determining at least one axial dimensional change at least for one of the above transducers (Tij), for arrangement of the above first instrument (E1) in the chosen position in relation to the above second instrument (E2).

EFFECT: improving fixing accuracy.

14 cl, 5 dwg

FIELD: physics.

SUBSTANCE: method of making an optical-mechanical module involves making a dimensional workpiece from optical material and a proportional rim from metal, preparation of joining surfaces, putting solder between joining surfaces of the workpiece and rim, positioning the workpiece and the rim using tools and subsequent indium soldering. Material of the optical element and the rim is selected from a list of materials with adhesion to indium. Joining surfaces of the workpiece and rim are prepared by polishing to a roughness value RZ≤0.1 mcm. The joining surfaces of the workpiece and rim are heated to temperature higher than melting point of indium. Solder is smeared onto the surfaces and then cooled. The soldering process is carried out under pressure which facilitates compensation for reduction in volume of the solder during phase transition.

EFFECT: making optical devices based on permanent joints of optical materials with a metal rim with high strength, are resistant to vibration effects and work in a wide temperature range.

2 ex

FIELD: physics, measurement.

SUBSTANCE: invention is related to facilities for alignment of optical elements. One pair is installed with the possibility of longitudinal displacement of single base in pair relative to the second one along two support balls, which are placed in guide slot arranged near edge of internal side on each base in this pair and created by two surfaces arranged at the angle below 90°, besides one surface of slot is parallel to plane of base. As the third point of support between bases on the edge opposite from support balls, thrust is installed, being fixed only on one of bases, or made in the form of single thrust ball. For longitudinal displacement of single base, pusher is installed relative to the second one. Two other pairs of bases are arranged with the possibility of declination from parallelism of single base in pair relative to the second one due to rotation of base around axis passing through centers of two support balls and parallel axis of longitudinal displacement of the first pair, besides bases in each pair contact between each other in three points of support, two of which are made by two support balls arranged on single edge of internal sides of bases pair, and the third point of support is made by pusher arranged on edge of bases pair internal sides opposite from support balls. Pusher may be arranged in the form of aligning screw or in the form of lever with two adjusting screws. Bases are spring-loaded relative to each other so that gaps are cleared between contact surfaces.

EFFECT: reduced dimensions and higher rigidity of structure, increase of sensitivity and accuracy of motions, simplified technology of manufacturing and assembly, which is provided by the fact that three-dimensional precision table comprises three pairs of parallel-arranged bases.

8 cl, 7 dwg

FIELD: physics.

SUBSTANCE: invention concerns area of optical instrument making and is intended for alignment of optical elements in optical systems where it is important to turn optical elements precisely with the minimum deflexion of their axis of rotation. The invention is directed on increase of optical element rotation accuracy. This technical result is provided because the device of precision rotation of optical elements has the basic rings with preload setting located between the underplate and the platform, forming surfaces of the contact electrode for the rolling elements in the basic assembly. According to the invention, position of the basic rings is corrected at the expense of additional adjustment that allows achieving moving of the rolling elements in one plane.

EFFECT: use of such adjustment allows reducing angular deflexion of a platform rotation axis and, accordingly, an axis of the optical element located on it to size less than 2 seconds of angle.

8 cl, 6 dwg

FIELD: physics; optics.

SUBSTANCE: proposed invention relates to optical instrument making and can be used in optical systems with high requirements for their regulation. The regulated optical module consists of an outer casing and optical element, fitted along an optical axis and joined to each other through a displacement mechanism. The optical element is fitted with possibility of moving along the optical axis. The displacement mechanism is a micro-adjustable jack and consists of a monolithic case and a differential. There are spring elements on the side walls of the case. The bottom part of the case is rigidly fixed on the outer casing. The inner casing of the optical element is fixed on the upper part of the casing. The differential consists of a bolt and two nuts, with different pitch of thread P. One of the nuts is rigidly fixed on opposite inner walls of the case of the micro-adjustable jack. The other nut can be moved on the threads of the bolt. The actuator of the regulated optical module consists of a manipulator and an electric motor. Also the optical element can be made either in form of a lens or mirror or prism.

EFFECT: increased accuracy and reliability of operation of the regulated optical module for moving an optical element with subsequent locking in a given position with considerable simplification of the design.

5 cl, 1 dwg

FIELD: physics, optics.

SUBSTANCE: invention concerns field of optical instrument making and is intended for an alignment of optical devices in optical systems where it is needed to translocate linearly optical device precisely to itself with diversions no more than 4 angular seconds. This technical effect is provided because four basic laths are mounted with a prestress negative allowance on the basis and the mobile part of the device and forming surfaces of contact for rolling devices in two basic units are anchored. Thus one basic lath is regulated at the expense of introduction of additional devices of adjustment and provides combination of axes of rolling devices travel two basic units in one plane. The angular diversion of the mobile part of the made device at travel on 20 mm has made 3.5 angular seconds.

EFFECT: increase of accuracy of travel of optical devices at the expense of neutralisation of inexactness of manufacturing and the making up of details of the device.

8 cl, 10 dwg

FIELD: instrument engineering.

SUBSTANCE: unit has motionless base, spherical base with device mounted for turn at motionless position, and rod which has one end tightly connected with spherical base. Spring flange, first adjusting disc which has flat and parallel edge surfaces, second adjusting disc which has one of end surfaces to be flat and the other one - spherical, self-setting washer and fast is introduced into the unit additionally according to invention. Central openings in first and second adjusting discs are made with eccentricity. Rod goes through opening in spring flange. Central openings of first and second adjusting discs pass through opening of self-setting washer. Other end of rod is fixed by fastening screw. Moreover, first and second adjusting discs and spring flange are connected together by means of leads. Some ends of leads are tightly mounted in openings of first adjusting disc at one radius, and the other ends are placed for rotation in opening of spring flange and in opening of second adjusting disc correspondingly. Spring flange interacts with motionless base by means of fixative member.

EFFECT: widened area of application; better functional abilities; simplified design.

3 cl, 7 dwg

FIELD: optical-mechanical instrument engineering.

SUBSTANCE: device for adjusting optical devices has internal and external cases, adjusting screws with heads mounted in external case and springs which have one ends attached to internal case and with other ends fixed in external case. Front side of internal case is connected along vertical line with front side of external case by means of flat spring made in form of plate. Plane of spring is perpendicular to longitudinal horizontal axis of optical device. Back sides of side surfaces of internal case have to flat and adjusting and they are disposed at angle to each other in such a manner that vertex of angle turns to internal case and is disposed at vertical line. Adjusting screws rest with their ends against adjusting surfaces through flat washers and are mounted in perpendicular to adjusting surfaces. Any end of any adjusting screw is made in form of spherical journal which has diameter to be bigger than diameter of washer's hole. Adjusting surfaces relate to friction coefficient as sin α<2k, where k is dry friction coefficient between washer of adjusting screw and adjusting screw and α is angle between adjusting surfaces. Springs are made tightening with total strength of F directed along bisector of α angle. Springs are fixed at back sides of internal and external cases. Strength of springs should meet the relation of F ≥a sin α/k - (M/2)g·cosθ, where C is coefficient of elasticity of plate at the direction of axis of case, M is weight of internal case, g is free fall acceleration, a is maximal amplitude of oscillation of the device and θ is angle between gravity vector applied to center of mass of internal case and bisector of α angle.

EFFECT: improved precision; higher resistance to influence of mechanical and climatic factors.

5 dwg

FIELD: optical instrument engineering.

SUBSTANCE: carrying cylindrical rods of the device are disposed longitudinal along light beams paths. Rods are connected with support plates made in form of polygonal prisms; support plates are mounted in perpendicular to rods. Rods are mounted in grooves disposed along the perimeter of side prismatic surface. Grooves are formed by two crossing surfaces being parallel to axis of rods. Clamp of prisms transmits the clamping force to both surfaces through rods. Grooves can be formed by side faces of prism and removable planks connected with side faces of prism. Support plates can be made of at least two lateral parts connected by ties. Two-point contact of rod/support plates joint allows increasing stability of rods and plates as well as mounting and dismounting support plates without dismounting the whole assembly.

EFFECT: simplified technique of production of materials with required properties.

25 cl, 3 dwg

FIELD: physics.

SUBSTANCE: method includes mounting a lens with its spherical working surface on the supporting shoulder of the cylindrical opening of an intermediate cylindrical part, placed on the supporting shoulder of the cylindrical opening of a main holder. The method includes measuring the beat of the centre of curvature of the first working surface relative to the axis of rotation; rotating the intermediate part of the holder to align the centre of curvature of the first working surface with the axis of rotation and fixing its position; tilting the lens to align the centre of curvature of the second working surface with the axis of rotation or placing the lens perpendicular to the axis of rotation and fixing the position of the lens in the intermediate part of the holder. The holder has an external cylindrical base surface and a flat external base flange which form the reference axis of the holder, an internal cylindrical opening with a supporting shoulder in which the intermediate cylindrical part with a supporting shoulder for mounting the lens is inserted. The internal cylindrical opening of the intermediate cylindrical part is offset relative to its external cylinder, and the internal cylindrical opening of the main holder has the same offset relative to the reference axis of the main holder.

EFFECT: high accuracy of centring a lens in a holder owing to centring on both surfaces of the lens.

2 cl, 1 dwg

FIELD: physics.

SUBSTANCE: method includes mounting a lens on the flat shoulder of the intermediate part of a holder, placed on the shoulder of the cylindrical opening of the main holder and capable of tilting. The method includes rotating the main holder about its reference axis, measuring the beat of the centre of curvature of the first working surface of the lens relative to the axis of rotation thereof, tilting the intermediate part to align the centre of curvature of the first working surface of the lens with the axis of rotation and fixing the position of the intermediate part; measuring the beat of the beat of the centre of curvature of the second working surface of the lens relative to the axis of rotation; shifting the lens on the flat surface of the supporting shoulder to align the centre of curvature of the second working surface of the lens with the axis of rotation and fixing the position of the lens in the intermediate part of the holder. The holder has an external cylindrical base surface and a flat external base flange which form the reference axis of the holder, an internal cylindrical opening with a supporting shoulder in which the intermediate cylindrical part is inserted with an increased seating clearance, said intermediate cylindrical part having a flat supporting shoulder for mounting the lens. The intermediate cylindrical part is mated with the supporting shoulder of the internal cylindrical opening on a spherical surface.

EFFECT: high centring accuracy owing to centring on both surfaces of the lens.

3 cl, 2 dwg

Telescopic sight // 2532605

FIELD: physics, optics.

SUBSTANCE: invention relates to optical instrument-making and can be used to fire from small arms. The telescopic sight with variable magnification comprises, mounted in a housing, a lens, an eyepiece, a magnification changing system in a movable holder and kinematically linked to a magnification changing mechanism, and controls. The telescopic sight further includes: an erecting system, a tube with a longitudinal groove in which the erection system is placed and a magnification changing system in a holder. The magnification changing mechanism consists of a pusher, a lever and a handle.

EFFECT: simple design of a magnification changing mechanism, providing control of the magnification changing mechanism with one control, improved performance of the sight.

3 cl, 2 dwg

FIELD: physics.

SUBSTANCE: method involves preliminary measurement of instrument errors of lens units and calculating therefrom variation value of one of the air spaces and turning angles of each of lens unit about the axis of the external cylinder of the lens unit. Axial shift and turning of all lens units is carried out. The optical and mechanical axes of the lens are superposed via radial shifting of all lens units. The lens has, inside the cylindrical opening of the housing with a supporting end plane and an outer threaded base cylinder, lens units in a common cylindrical holder capable of axial displacement relative the supporting end plane, and a spacer adjustment ring and a spring for elastic axial closing of the common cylindrical holder. The lens is provided with a cylinder bushing with a recess directed along the axis of the cylindrical opening of the housing; the bushing is rigidly connected to the common cylindrical holder of the lens units in a radial direction and elastic closing in the axial direction by a spring. The bushing can move along the axis of the cylindrical opening of the housing and turn about that axis. The cylindrical opening of the housing has an eccentricity Δk relative the outer threaded base cylinder of the lens, and the inner opening of the common cylindrical holder of the lens units has an eccentricity Δo relative the outer cylinder of the common cylindrical holder.

EFFECT: high quality of adjustment while enabling automation thereof.

2 cl, 1 dwg

Camera module // 2496128

FIELD: physics.

SUBSTANCE: device has a shutter unit mounted on the front surface of the front lens carrier. The shutter unit has a shutter blade which opens and closes the optical path of the image capturing system through a shutter blade drive. An opening is made for the optical path in the casing holding the shutter blade with a drive. The shutter unit is mounted on the front surface of the front lens carrier by engaging sections for fixing the cover and sections for fixing the casing with each other.

EFFECT: fewer components and simpler shape thereof.

7 cl, 50 dwg

Lens module // 2427014

FIELD: physics.

SUBSTANCE: lens module has at least two mountings, each having at least one lens-type optical element. The mountings are pivotally connected to each other in form of a chain and can turn about the swivelling joints. The chain of mountings lies between two mirrors and can change its configuration from transporting to working state. In the transporting state, the chain is flattened and optical elements in different mountings have differently directed optical axes which form with each other angles close to zero degrees. In the working state, the configuration of the chain changes such that optical elements together with two mirrors form the optical system of the lens, having one common optical axis formed due to reflection from the mirrors.

EFFECT: less restrictions on cameral thickness.

4 cl, 1 dwg

Objective lens // 2406101

FIELD: physics.

SUBSTANCE: objective lens has at least two holders in each of which there is at least one lens. The holders are mated and pivotally joined to each other in form of a chain and form moveable chain links. The holders can turn about axes passing through the mating sides of neighbouring holders. The chain of holders can change its configuration from a transportation state in which the holder is flattened and lenses of different holders have different optical axes, to a working state, in which the chain of holders is folded by a pack, and all lenses have a common optical axis.

EFFECT: reduced size in transportation position.

4 cl, 1 dwg

FIELD: physics; optics.

SUBSTANCE: proposed method involves fitting an imitation of each lens, made from material which is transparent in the visible spectrum, into its frame and fixing the imitation lens into a "floating" chuck such that, the centre of curvature of the base surface of the imitation lens coincides with centre of oscillation of the cup of the "floating" chuck. Through adjustment of the frame in the "floating" chuck while monitoring using an autocollimating microscope, autocollimation images of the centres of curvature of two optical surfaces of the imitation lens are displayed on the axis of rotation the main spindle. After that, the lens imitation is removed from the frame and replaced by an objective lens. Self-centring of the hidden surface of the lens takes place. By turning the cup of the "floating" chuck, while monitoring with an autocollimating microscope, an autocolliamation image of the centre of curvature of the visible surface of the lens is displayed on the axis of rotation of the main spindle. After that, the butt end and cylindrical surfaces of the frame are processed.

EFFECT: more accurate assembly of objectives with lenses, transparent in the visible spectrum, and more functional capabilities.

FIELD: physics, optics.

SUBSTANCE: invention is related to optical instrument-making and may be used in devices for reception and focusing of optical radiation in conditions of signification changes of ambient temperature. In optical system containing at least one lens with frame installed with the possibility of shift along optical axis in relation to casing, and unit of temperature compensation that is fixed between frame and casing and comprises compensation element made from material with linear expansion coefficient that differs from casing material and is installed parallel to optical axis, unit of temperature compensation is arranged in the form of pivot mechanism that contains yoke, elastic element and clamp, at that compensation element is rigidly fixed to casing with its one end, and with the other end it is pivotally connected to the first arm of yoke, which is installed with the possibility of rolling in relation to the first cam provided on casing, the second arm of yoke is joined by means of clamp to the second cam made on frame and installed diametrically opposite to the first one, and is connected through elastic element to casing.

EFFECT: provision of temperature compensation at high defocusing of optical system.

4 cl, 1 dwg

Dual-mode display // 2343510

FIELD: physics; processing of images.

SUBSTANCE: invention is related to the field of portable Dual-mode display comprises monochromatic mirror display of direct vision and full-colour virtual display, which is installed behind monochromatic mirror display of direct vision. Monochromatic mirror display of direct vision comprises reflecting panel that has the first circuit of pixels location, and narrow-band reflector installed behind reflecting panel. Virtual display has the second circuit of pixels location, at that every pixel radiates light in one of three main colour band through monochromatic reflecting display of direct vision, and light radiated by every pixel, in combination with light radiated by other pixels of virtual display, forms full-colour virtual image from dual-mode display.

EFFECT: higher convenience of portable displays application.

9 cl, 4 dwg

FIELD: instrumentation.

SUBSTANCE: invention relates to the field of control of items tightness. The method of mass-spectrometry based control of tightness of monoblock gas lasers includes development of closed volumes at both sides of the controlled laser shell, pumping of the inner volume together with a sample gas analyser to high vacuum, accumulation in the controlled shell, connected with the analyser of sample gas by stopping of pumping of sample gas during pumping of other gases and registration of variation of background value of sample gas peak for the control time Tc, selected when reaching the linear section of sample peak value growth, which is determined until dependence of intensity of background flow of sample gas on time during adjacent measurements will not match in curvature and intensity with accuracy of up to 10%, but at least 3 times. They resume pumping of controlled volume together with the gas analyser, supply of sample gas into the external closed volume, wait for at least establishment of the stationary flow of the sample gas via defects of surfaces, connected by vacuum-tight method of optical contact, accumulation of sample gas in the controlled volume, registration of variation of summary peak of pressure of sample gas for the control time Tc by stopping of pumping from the sample gas analyser during pumping of other gases. Product tightness is assessed by difference of total and background values of the sample gas peak at the moment of time Tc. Accumulation of sample gas in the inner volume of the controlled shell is carried out with a pumping gas analyser disconnected from the controlled volume. Registration of the accumulated sample gas is carried out after time Tr, determined by laser design, sample gas and being higher than time of establishment of the stationary flow of the sample gas via defects of surfaces, at least four times.

EFFECT: technical result consists in increased percentage of leak detection, and also in increased accuracy of detection of their location.

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