Device for protecting and inspecting state of optical surfaces in focal plane of lens of optical device
FIELD: physics, instrument-making.
SUBSTANCE: disclosed device relates to optical-electronic instrument-making, is intended for protecting optical surfaces of optical devices from contamination, mechanical damage and inspecting the state of optical surfaces in the focal plane of the lens of an optical device without removing the protective cover at all phases of testing the optical device and can be used in optical devices for spacecraft. The disclosed device comprises a protective cover with two openings, to one of which is mounted an illuminator and to the other - means of inspecting state of optical surfaces in the focal plane of the lens of the optical device. The inspection means is focused on the optical surface in the focal plane of the lens of the optical device, and the device is equipped with protective caps which are fitted in place of the illuminator and the inspection means and are fastened by locking members during storage of the optical device.
EFFECT: providing reliability of inspecting state of optical surfaces in the focal plane of the lens of an optical device during ground tests of optical devices installed on spacecraft without removing the protective cover.
SUBSTANCE: method includes turning the rotary support of a telescope using a vertical stud which is kinematically connected to the rotary drive on the azimuth. During rotation of the stud with creeping speed, the end bearing assembly of the stud is unloaded in the axial direction through an electromagnetic unloading device. While unloading, the value of the vertical unloading force of the support bearing of the latter is monitored using weight-measuring strain gauges. Measurement data are transmitted from said sensors to a computing device of the telescope control system and the latter is used to determine and establish the required value of the unloading force of the support bearing of the end bearing assembly of the stud.
EFFECT: high tracking reliability and accuracy of guiding a telescope while providing tracking with creeping speed.
2 cl, 3 dwg
FIELD: physics, optics.
SUBSTANCE: invention relates to devices for supporting an optical telescope tube and which enable to point the tube at an optical object and track said object. The telescope mount includes a support on which a frame is mounted with possibility of rotating around a horizontal axis and mounting in the polar axis plane P, said frame having a shaft on which a fork is mounted. After installing the telescope mount, the axis of rotation of the shaft is directed towards the elevated pole; said fork is capable of turning about said shaft using two linear drives mounted on both sides of the shaft between the frame and the fork. A telescope is suspended from the fork, said telescope having a mechanism for turning about the vertical axis A and a mechanism for turning about the horizontal axis Z. The base of the telescope has two semi-axes where the telescope is suspended from the fork, and said fork is rigidly connected to the base of the telescope by a third linear drive. For the horizontal position of the axis of rotation of the semi-axes of the fork, the vertical axis of the telescope A is directed towards the zenith of the point. The technical result of the disclosed solution is enabling use of a telescope at arbitrary geographic latitudes of the northern and southern hemispheres by turning about the horizontal axis and mounting the frame in a polar axis plane; providing smaller dynamic loads on the optical system and high stability of the image quality owing to that turning is carried out with two linear drives, the fork and the entire structure of the telescope are unloaded; providing smoothness and controlled accuracy of turning the fork of the mount and the telescope during operation in equatorial mode owing to that linear drives are used during turning. The compound telescope mount design combines the advantages of azimuthal and equatorial mounts.
EFFECT: switching from one mode to the other is fast, rate of switching depends only on inertia of the system and the observation object remains in the field of the telescope.
8 cl, 4 dwg
SUBSTANCE: invention relates to space telescopes and can be used for various girder and chassis structures with high requirements for geometric stability of dimensions under the effect of temperature. The space telescope supporting girder consists of longitudinal, transverse and diagonal cylindrical bars whose dimensions are stable under the effect of temperature and are joined with each other in intersection nodes. The longitudinal, transverse and diagonal bars are composite and are joined to each other by a toral basket shell on the larger axis. The toral basket shell is filled with thermometric fluid, wherein geometric dimensions of each of the composite cylindrical bars, the toral basket shell, characteristics of the used material and physical properties of the thermometer fluid are linked by the relationship:
EFFECT: eliminating said shortcomings, ie reducing weight, simplifying the technology of manufacture, reducing the cost of manufacture while providing stability of longitudinal and transverse linear dimensions of the space telescope supporting girder in a non-uniform temperature field without increasing defocusing of the space telescope.
SUBSTANCE: telescope has a supporting and turning arrangement with a base and an optical unit with a blind, placed on a conveyor platform with a frame, a protective cover and wheel assemblies. The frame is detachably connected to the wheel assemblies and allows to fit the frame and the base in a fixed position on embedded parts of a prepared platform when the wheel assemblies are disconnected. The cover has vertically detachable protective flaps which are movably connected to the frame by mechanisms for opening and closing the flaps. The base and the frame are detachable and the mechanisms for opening and closing the protective flaps are mounted on the frame in longitudinal directions outside the inner volume of the cover with possibility of turning the protective flaps outside by -180 degrees. The base and the frame can be mounted on the embedded parts which are embedded into the base support and the frame support, respectively, and the base support and the frame support are constructed with gaps and loose foundations.
EFFECT: high penetrating capacity, improved accuracy characteristics and avoiding blockage of the field of view during operation in a near-horizontal region.
3 cl, 5 dwg
SUBSTANCE: support rod with binoculars for conducting levelling works without using a level, characterised by that the binoculars are fitted with periscopes on the side of the lenses with a vertically movable mirror in one of the two parts of the binoculars with turning angle thereof twice less than the inclination angle of the binoculars relative the horizontal surface, having an extendable part for resting on a surface, wherein the extendable part is fitted with a scale with divisions for measuring the height of the periscopes over the surface.
EFFECT: simple process of levelling.
FIELD: instrument making.
SUBSTANCE: proposed frame consists of lengthwise, crosswise and diagonal rods interjointed at cross points. Said rods are composite and are jointed together be bimetal rings along their ODs and IDs. Note here that said rods, at their joint with bimetal rings, have lengthwise cutouts made for fringe effect length. Note here that geometrical sizes of composite cylindrical rods, bimetal wings as well as physical and mechanical properties of used material are interrelated by relationships specified in invention claim.
EFFECT: stability of frame linear sizes in irregular temperature field that allows reducing telescope defocusing.
SUBSTANCE: stable-size enclosure comprises metal cylindrical-shape enclosure, stringers oriented along enclosure lengthwise axis and face metal frames. Proposed enclosure has annular "П"-like flutes. Stringers are made from layers of fibrous material impregnated with polymer binder and arranged on outer surface of "П"-like flutes. Stringers feature negative thermal coefficient of linear expansion along enclosure lengthwise axis and are mechanically coupled with its skin in sections where it adjoins annular "П"-shape flutes.
EFFECT: higher axial size-stability under temperature and vacuum effects.
3 cl, 3 dwg
FIELD: astrophysics, possible use during building and operation of head structures of observatories for astronomical, geophysical and meteorological research.
SUBSTANCE: the structure for astronomical observations comprises a cover in form of a dome, positioned on a base which is moveable in azimuth direction and which has a hollow shelf in form of rotation body on the side of its supporting section, installed in a recess of supporting unit with a gap, into which liquid is injected, a motor for turning the base, connected to control block, and a tool, assembled on moveable base. Structure contains balancing mass for combining gravity center of rotary section of structure with its rotation axis and ballast masses for stabilizing weight of its moveable part, assembled on back side of base, oppositely to operator workplaces. Ballast masses are made in form of vessels with liquid, hydraulically connected to hydro-system provided in the structure. Also, a tool for observation of celestial bodies and methods for assembling and operating the structure are disclosed.
EFFECT: increased operational characteristics of product due to minimization of pressure of mobile part of structure on supports, reduced flow of energy during operation of structure and expanded weight characteristics of structure.
4 cl, 5 dwg
FIELD: engineering of optical-electronic devices, possible use as indicator device for provision of information safety of service rooms, offices, etc.
SUBSTANCE: device containing observation pipe including body, objective and ocular, emitting channel containing a source of visible radiation, lens, reflective prism glued to internal surface of objective. Reflective side of prism is mounted on optical axes of lens and objective at and angle thereto. Device also includes a cover made of upper and lower parts and having cross-section shape close to oval, first and second rings. Circular shelves are made on end surfaces of cover. In upper part of cover three recesses positioned serially are made and an aperture, and in lower part power block unit is positioned made in form of solid cylindrical aperture on frontal end surface and recess close to back end surface of cover. First and second rings are mounted on circular shelves of, respectively, frontal and back end surfaces of cover. Switch is mounted in aperture on upper part of body.
EFFECT: simplified construction, increased comfort of operation.
2 cl, 3 dwg
SUBSTANCE: method includes using a correcting holographic optical element in the form of a digital hologram; positioning a CCD array behind the paraxial image plane of the object; recording the defocused image constructed by the lens, said image being taken as the digital axial hologram of the image with which, using digital holography techniques, holographic fragments of the entire image are reconstructed numerically and layer-by-layer, after which the reconstructed image fragments are transferred to a single plane.
EFFECT: wider field of use, faster operation and quality of holographic correction of lens aberrations.
FIELD: measurement equipment.
SUBSTANCE: complex is designed to monitor and measure parameters of thermal imagers. The complex comprises a lens, a replaceable test object located in a focal plane of the lens, a background emitter, located behind the test object and equipped with an actuating element, a control device, the outlet of which is connected to the actuating element of the background emitter, a temperature processor, the outlet of which is connected to the inlet of the control device, a device to measure test object temperature, the outlet of which is connected to the first inlet of the temperature processor. The replaceable test object is arranged as mirror and is installed at the angle to the axis of the lens, providing for reflection along the axis of the lens of infrared radiation flow, arriving to the test object from the additionally introduced reference radiator, equipped with a device of temperature measurement of the reference radiator, the outlet of which is connected to the second inlet of the temperature processor. Additionally the first and second devices are introduced to measure temperature of the background radiator, the outlets of which are connected accordingly to the third and fourth inlets of the temperature processor.
EFFECT: increased accuracy of contrast radiation level maintenance.
2 cl, 1 dwg
SUBSTANCE: apparatus comprises input collecting and output collimating optical systems connected to each other by a fibre-optic delay line in the form of a light guide. The input and output ends of the light guide are located in the focal planes of the input and output optical systems, respectively. The input collecting and output collimating optical systems are formed by two coaxial menisci, whose concave side faces the end of the light guide and have a mirror coating on the convex surfaces. The mirror coating of the meniscus lying first from the end of the light guide is in the form of a peripheral annular area. At least one end of the light guide can be mated with a plane-parallel plate in an opaque area, having a diaphragm which is coaxial with the light guide, said diaphragm having a diameter smaller than the diameter of the light guide. At least one of the menisci can be glued.
EFFECT: producing a compact device with high manufacturability, high quality of forming laser beams and a simple design.
3 cl, 5 dwg, 7 tbl
SUBSTANCE: optical probing signal is entered into each fibre of the optical line. Each specified signal which passed through the respective fibre of the line is consistently read out and an optical fibre in the line is identified on the basis of the received signal. The probing signal for each fibre of the line has a unique sequence of optical impulses which characterizes the number of optical fibre in the line.
EFFECT: automation of the process of identification of optical fibres, improvement of reliability of identification of the ends of optical fibres irrespective of their number, arrangement and colour marking.
2 cl, 2 dwg, 1 tbl
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
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
FIELD: physics, optics.
SUBSTANCE: invention relates to fibre optics, particularly to distributed fibre-optic sensors which measure parameters of an optical fibre under the effect of external physical fields. The disclosed methods for distributed measurement of birefringence in optical fibres with polarisation preservation, in addition to known methods which employ three signals, employ a fourth signal. Detection and statistical processing of recorded signals is performed using means of processing and storing signals with a zero mean. The fourth signal in the form of a linearly polarised signal can be fed into the optical fibre towards a probing signal and in the polarisation of the probing signal. In another version of the method, the fourth signal is mixed with a scattered signal during detection thereof.
EFFECT: improved spatial resolution, measurement accuracy and/or range (length) of the investigated section.
8 cl, 13 dwg
SUBSTANCE: method includes using an autocollimating flat mirror mounted in front of an optical lens surface situated last on the beam path from the focal plane. A radiation detector array with an imaging device is mounted in the same plane, close to the focal plane, with a radiation source. The autocollimation image of the radiation source, which is reflected from the flat mirror, is transferred to the plane of the radiation detector array. The rigidly fastened source-detector array assembly is moved towards or away from the lens. The focal plane is found by observing an image of the source on the display device based on one of known criteria of the quality of the image of the source. The source-detector array assembly is moved to the external position across the viewing field on an optical rail mounted perpendicular to the optical axis of the lens. By turning the flat mirror, the autocollimation image of the source is transferred to the plane of the detector array. Linear shift of the assembly relative to the optical axis d and the turning angle of the autocollimating mirror A are measured, and the focal distance of the lens f'=d/tgA is determined.
EFFECT: easy measurement of focal distances of long-focus lenses.
FIELD: measurement equipment.
SUBSTANCE: installation comprises a collimator with a test-object, a monitored item and a measuring unit. The test-object is made as a cross hair and rigidly fixed in the focal plane of the collimator. The monitored item is made as television or thermal imaging one, its radiation detector is set in the focal plane of the lens of the monitored item. A flat mirror able of rotating around the vertical axis is installed between the collimator and the monitored item. The collimator output via the flat mirror is connected to the monitored item lens. The measuring unit comprises a panel for synchronisation and formation of line illumination pulse and two margin pulses, a double-beam oscillograph and a video monitor. The monitored item output is connected to the input of the first channel in the double-beam oscillograph and to the input of the panel for synchronisation and formation of line illumination pulse and two margin pulses, while the first output of the latter is connected to the video monitor input. The second output of the said panel is connected to the input of the second channel in the double-beam oscillograph.
EFFECT: improved reliability of the obtained results, increased information value and monitoring accuracy, possibility to monitor and define test-object parameters in the form of miras with vertical and horizontal lines.
SUBSTANCE: interferometer has a monochromatic light source and series-arranged afocal system for forming an expanded parallel light beam, a plane-parallel beam splitter oriented at an angle to the parallel light beam, a first plane mirror with a reflecting coating facing the plane-parallel beam splitter and configured to change the angle of inclination to the parallel light beam passing through the plane-parallel beam splitter, a second plane mirror configured to change the angle of inclination, and a recording unit placed in the beam of light reflected successively from the first plane mirror and the plane-parallel beam splitter, and having a focusing lens and a photodetector. The second plane mirror is placed between the afocal system and the plane-parallel beam splitter, and its reflecting coating has low transmission and faces the reflecting coating of the first plane mirror.
EFFECT: high accuracy of monitoring focusing and residual wave aberrations of telescopic systems and objective lenses due to interference of light waves passing through the monitored telescopic system or objective lens multiple times.
2 cl, 3 dwg
FIELD: optical engineering.
SUBSTANCE: device has receiving optical module placed in series with optic signal delay unit and radiation unit. Axes of receiving optical module and radiation module are aligned. Receiving optical module additionally has mesh with luminous radial lines and transparent diaphragm which is disposed in point of crossing of lines of mesh and mounted in focal plane of first objective. Device also has photoreceiver, measurement data control and registration unit, illuminator, optical unit, fiber-optic divider and fiber-optic adder.
EFFECT: improved precision of monitoring of non-parallelism of axes; widened range of application.
3 cl, 3 dwg