Large lightweight space telescope mirror
(57) Abstract:Lightweight mirror space telescope consists of a monolithic block having a T-shaped longitudinal section. With its back surface are connected by a thin plate. The system facilitates holes has a radial-ring structure, radial and annular rib which is continuous throughout. Attachment points are located on the rear surface of the monolithic block on the radius, providing the condition WHmax=WBHmaxwhere WHmax=WBHmaxdeformation of the outer and inner contours reflecting the working surface of the mirror supported on the mounting point. The mirror has a high degree of relief, while maintaining sufficient rigidity of the structure. 2 Il. The invention relates to the field of opto-electronic instrumentation, in particular for space telescopesthrough, and can be used in the development and manufacturing of large space-based optics.Known analogue of , in which in order to reduce the mass of the mirror its thickness decreases as the outer and inner edges. Dostoevsky telescopes.Known lightweight optical mirror , is a monolithic block with a reflective work and back surfaces, the latter of which performed regularly spaced holes, connected coaxially with him cylindrical cavities. But here is not achieved very high degree of relief, but also the lack of a solid back surface reduces the rigidity of the mirror.Closest to the proposed invention the technical essence is large lightweight mirror space telescope  was chosen for the prototype. The mirror is a monolithic block with a Central hole and a reflective work and back surfaces, the latter of which is made easier holes, the location of which has a radial-ring structure. While radial and annular ribs are continuous throughout. However, this solution has drawbacks, the main of which are: insufficient degree of relief, the lack of rigidity due to the lack of continuous back surface, and the extreme difficulty of processing the internal cellular structure and the impossibility of obtaining ravintolasalia of the invention is to increase the degree of relief of the large mirror space telescope maintain high stiffness characteristics.To perform the tasks proposed large lightweight mirror space telescope, made in the form of a monolithic block with a Central hole and a reflective work and back surfaces, the latter of which is made easier holes, the location of which has a radial-ring structure. While radial and annular ribs are continuous throughout. A feature of this mirror is the implementation of a monolithic block, the meridional cross-section of which is T-shaped. Attachment points are located on the rear surface of the monolithic block on the radius of ensuring the fulfilment of the conditions: Wnmax= WNRmaxwhere Wnmax= WNRmaxdeformation of the outer and inner contours reflecting the working surface supported on the mounting point. In addition, the mirror is equipped with a thin plate, narashima connected with the back side of the monolithic block.High degree of relief proposed in the mirror is achieved by the following main factors. Of the mirror's mounting point transferred from external and internal contours for optimal from the point of view of deformation of lilo to burn off some of the material in the space, the limited diameter of the outer contour of the DNKand Dnand in space, the diameter of the internal circuit DKSSand DNRby performing the monolithic block is T-shaped.Manufacturer of lightweight mirrors are, as a rule, when the bearing of the mirror back on a special discharge (either hydraulic or pneumatic). In the proposed mirror for installation of unloading is the circular area bounded by diameters of Dnand DNR. The ratio between the diameter of the outer contour of the DNKand Dnand the ratio between the diameter of the internal circuit DKSSand DNRselected such that the condition: Wnmax= WNRmaxwhere Wnmax= WNRmaxdeformation of the outer and inner contours reflecting the working surface supported on the attachment point.Thin plate, narashima connected with the back side of the monolithic block, with low weight significantly increases the stiffness of the mirror.In Fig.1 shows the design of the proposed invention, Fig.2 - section A-A in Fig. 1.Depicted on ficou mirror surface 2 and the back 3. With the back side 3 narashima connected (for example anodic bonding method) thin plate 4. Location facilitates hole 5 has a radial-ring structure 6 (Fig. 2).On optimal from the point of view of deformation of the working surface 2 radius there are special holes 7 (Fig. 1) for attachment to the frame (in this example, for example, the number of holes is equal to three).Thus, the execution of the large mirror with a T-shaped longitudinal cross-section of a monolithic block, the back side which narashima connected with the thin plate, and the placement of the attachment points on the rear surface of the monolithic block on optimal from the point of view of deformation of the working surface radius allowed us to achieve a significant degree of relief while maintaining high rigidity of the mirror. Calculations and mathematical modeling of the proposed design of the mirror confirmed the high rigidity of the structure when reaching the degree of ease about 0,85.Literature
1. A. Hewitt "Opticheskie and Infrakrasnye telescopes 90s",M.: Mir, 1983, S. 76-80.2. Author's certificate N 617759, G 02 In 5/08.3. U.S. patent N 4678293, G 02 In 5/10, 1987 - protato block with a Central hole and a reflective work and back surfaces, in the last of which is made easier holes, the location of which has a radial-ring structure, and radial and annular ribs patterns continuous throughout, wherein the monolithic block has a T-shaped longitudinal section, and the attachment points are located on the rear surface of the monolithic block on the radius of ensuring the fulfilment of conditions
where Wnmax,WNRmaxdeformation of the outer and inner contours reflecting the working surface of the mirror supported on the attachment point, while the back side of the monolithic block narashima connected with a thin plate.
FIELD: optical engineering.
SUBSTANCE: at least two dielectric layers are produced with preset thickness. Layers are disposed one onto the other to form pack of layers. Thickness of layer packs is subject to reduction and thicknesses of separate layers are similarly reduced by means of deforming layer packs to keep relation of thicknesses or relation of thicknesses of layers. Layer pack is disposed between two carrying layers before subjecting the layers to deformation. At least one carrying layer is formed from several separate layers, which are supposed to be disposed subsequently at the end of process of partial deformation at any previous layer of carrying layer. Separate layers of carrying layer can be overlayed onto previous separate layers of carrying layer.
EFFECT: simplified process of manufacture; improved reflection factor.
FIELD: mirror systems of observation.
SUBSTANCE: coordinates of point of driver's eye and reference point at object to be observed in the driver mirror are measured by rule as well as reference point at mirror of transportation vehicle. Angles of inclination of mirror to coordinate planes are found from relations mentioned in formula of invention. Inclination of driving mirror to coordinate planes is determined. Random point at object of observation is preset and its coordinates are measured by means of measuring tape. Coordinates of point in mirror are calculated where the light beam reflects from the mirror and enters driver's eye. Procedure repeats many times for many random points at object of observation and coordinates of corresponding points of reflection at plane of mirror are found. Shape and sizes of mirror are determined by end points of reflection.
EFFECT: simplified determining of shape and sizes of mirror; improved precision of orientation.
2 cl, 2 dwg
FIELD: optical instrument engineering.
SUBSTANCE: invention can be used for wide-band light reflecting. Reflecting surface has dielectric layers A, B and C. A layer is made of material having low refractivity, B layer is made of material with average refractivity and C layer is made of material having high reflectivity. Optical thickness of layers equals to λr/4, where λr is wavelength of middle part of interval having high refractivity. Sequence of layer alternation looks like (CDCABA)KCBC, where K>=and has to be integer. Spectrum range with high reflectivity is widened due to shift in adjacent bandwidths at opposite sides along wavelength scale.
EFFECT: widened spectrum range with higher refractivity.
FIELD: optical industry.
SUBSTANCE: mirror can be used when producing optical reflecting systems in lasers and experimental physics. Mirror has transparent dielectric base. Metal coating is applied onto the base. Coating has to nanoparticles, for example, silver nanoparticles, which have plasma resonance at electromagnet radiation frequency. The mirror intends to reflect the radiation. Linear dimensions are far smaller than the radiation wavelength. Nanoparticles are applied uniformly onto surface of the base to cover 15% of its area. Thickness of mirror is reduced to minimal size; size of spot of reflected radiation in focus is reduced.
EFFECT: reduced thickness of mirror; improved precision.
FIELD: electric engineering.
SUBSTANCE: integral micromechanical mirror has substrate to place four electrodes onto it. Four additional electrodes of capacitive movement converters are disposed onto the substrate in such a manner to form flat capacitor with mirror element. One additional fixing plate is disposed under mirror element directly onto substrate. There are torsion beams placed in such a way that they connect mirror element with fixing plate. Mirror element, torsion beams, electrodes of electrostatic drives and capacitive converters as well as fixing plate are made of semiconductor material. Area of substrate used for placing integral mirror is reduced. Position of mirror element is subject to control relatively the substrate.
EFFECT: improved reliability of operation.
FIELD: ultra-violet radiation.
SUBSTANCE: the mirror-monochromator has a multi-layer structure positioned on a supporting structure and including a periodic sequence of two separate layers (A,B) of various materials forming a layer-separator and a layer-absorber with a period having thickness d, Bragg reflection of the second or higher order is used. Mentioned thickness d has a deviation from the nominal value not exceeding 3%. The following relation is satisfied: (nAdA + nBdB)cos(Θ) = m λ/2, where dA and dB - the thicknesses of the respective layers; nA and nB - the actual parts of the complex indices of reflection of materials of layers A and B; m - the integral number equal to the order of Bragg reflection, which is higher than or equal to 2, λ - the wave-length of incident radiation and Θ - the angle of incidence of incident radiation. For relative layer thickness Г=dA/d relation Г<0.8/m is satisfied.
EFFECT: provided production of a multi-layer mirror, which in the range hard ultra-violet radiation has a small width of the reflection curve by the level of a half of the maximum at a high reflection factor in a wide range of the angles of incidence.
6 cl, 1 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to optical observation devices for use on automobiles and other vehicles. proposed system of mirrors contains rear view mirror 7, outer side mirrors 8, 9 and inner side mirror 5, 6, additional mirrors 10, 11, 12 and front mirror 4. Front mirror 4 and inner side mirrors 5, 6 are arranged in driver's field of vision. Front mirror 4 consists of separate adjustable parts 4а, 4б, 4в and it reflects panorama of spaces behind and at both sides from driver from rear view mirror 7 and outer side mirrors 8, 9. Inner side mirrors 5, 6 reflect directly parts of spaces arranged at both sides from driver which are not seen in outer side mirrors 8, 9.
EFFECT: provision of safety on the road owing to panoramic reflection of rear and side spaces around vehicle.
5 cl, 25 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to optical devices of automobiles, particularly, to front view mirrors. Front view device for automobiles with steering wheel at right side contains two mirrors installed inside automobile at angle relative to each other with possibility of providing periscopic effect and reflecting front part of road. Like sizes of mirrors and distance between mirrors and between mirrors and driver are in following relationship: B1:B2=(L1+L2):L2 where B1, B2 are like sizes of reflecting surfaces of first and second mirrors, respectively; L1, L2 are distances from first mirror to second mirror and from second mirror to driver, respectively.
EFFECT: improved quality of picture and reliability of front view device.
4 cl, 3 dwg
FIELD: the group of inventions refer to laser technique and may be used in mirror elements of laser resonators and in arrangements for transmission of laser radiation.
SUBSTANCE: the laser mirror has two identical, not communicating between themselves, symmetrical priming contours of heat-carrying agents located between the front plate on whose exterior side a reflective surface is fulfilled, and the rear plate on both sides of the diagram located in the symmetry plane of the arrangement. Each of the priming contour of the heat-carrying agents is fulfilled in the shape of in-series located, beginning from the diagram, a driving collector, a draining collector, a heat exchanger whose exterior surface adjoins to the inner surface of the corresponding plate. The cavity of the driving collector is connected via channels passing through the draining collector with the heat-exchanger which is connected with the cavity of the draining collector. In the second variant of the arrangement the reflective surfaces of the laser mirror are fulfilled on the exterior sides of the front and the rear plates. The heat exchangers are fulfilled in the shape of identical infiltration elements of the same sizes and forms correspondingly to the front and the rear plates.
EFFECT: reduces thermal distortions of the reflective surface and also increases the service term of the laser mirror.
4 cl, 1 dwg
FIELD: controlled optics.
SUBSTANCE: semi-passive bimorph flexible multiplayer mirror can be used as corrector in adaptive systems for dynamic controlling of radiation wave front. Deformed controlled bimorph semi-passive mirror has passive substrate and at least two layers of control electrodes provided with piezo-ceramic discs, which discs are separated by "ground electrodes". Shape and disposition of electrodes of all layers are specified independently to compensate specific type of aberration.
EFFECT: improved sensitivity; reduced sizes; reduced applied voltages.