Lighting device for an optical device

 

(57) Abstract:

Usage: optical devices operating in the reflected light from the object. The essence of the invention: lighting device containing a light source, a beam splitter, a reflector and a light trap entered a focusing element, interfacing optical light source with the inlet of the light traps. 1 Il.

The invention relates to the instrument and can be used to create lighting devices of various optical devices operating in the reflected studied or observed by light objects, such as microscopes, interferometers, autocollimators and so on.

Known lighting device containing a light source, a beam splitter and a reflector, the role played by the surface of the observed object [1]

The lack of such illuminators presence in the field of view of the device of a significant amount of diffused light reduces the contrast of the image.

Known lighting device, which body is made the holes for the output of the device the light transmitted from the source through a beam splitter [2]

The disadvantage of this illuminator having multiple spritename the technical essence is a lighting device [3] incorporates, in addition to housing, light source, beam splitter and reflector light trap, absorbing the light passing through the beam splitter, and preventing the entry device of light from external sources.

The disadvantage of this device back to the device from the trap part of the world is forced through a large inlet of the trap, which reduces image contrast.

This goal is achieved by the fact that in the known illumination device for an optical device operating in reflected light, comprising a housing, a light source, a beam splitter, a reflector and a light trap entered a focusing element mounted between the beam splitter and the light trap is made in the form of hollow spherical shape with a light absorbing coating, the inlet of which is optically connected with the light source.

The drawing shows a schematic diagram of the autocollimator, which includes the lighting device.

The autocollimator includes a housing 1 of the lighting device, the light source 2, mark 3, a beam splitter 4, the grid 5, the eyepiece 6, a lens 7, the reflector 8, the focusing element 9, the light trap 10, made in the form of hollow spherical shape with a light absorbing coating. is shiroudi element 9 reflects the light source in the plane of the drilled hole.

Does the lighting device as follows: light from a source 2 illuminates the mark 3, falls on the beam splitter 4 and is partially reflected them in the direction of the lens 7, which converts the divergent light beam in parallel and sends it to the reflector 8. The reflected light hits them again on the lens 7 and focuses them in the grid plane 5, which is observed through the eyepiece 6. Part of the light that passes from source 2 through a beam splitter 4, falls on the focusing element 9, going in the plane of the inlet light trap 10, gets into it, and the result of multiple meetings with the spherical surface of the trap is absorbed by its cover. Due to this, the proportion of light scattered parts of the device, in the field of view is sharply reduced and the contrast of the image increases.

Lighting device for an optical device operating in reflected light, comprising a housing, a light source, a beam splitter, a reflector and a light trap, characterized in that the input of the focusing element mounted between the beam splitter and the light trap is made in the form of hollow spherical shape with a light absorbing coating, the inlet of which is optically connected with the light source

 

Same patents:

FIELD: electricity.

SUBSTANCE: invention relates to the field of lighting equipment. Technical result is improvement of lighting efficiency for portable lighting devices. The claimed lighting device has a scrolling function that provides lighting of the observed area at which the user is concentrated at present and the lighted area is scrolled forward and backward during reading. The lighting device contains two varieties of light-emitting units, an illuminating substrate, a controller and a selector. The selector controls one variety of the light-emitting units which illuminate a part of the illuminating substrate capable to deflect light to a part of the observed surface.

EFFECT: selector is intended to select an operating mode for the lighting device in manual control mode and preset scrolling mode.

10 cl, 6 dwg

FIELD: optics.

SUBSTANCE: device has circular metallic plate, in which a periodic matrix of rectangular slits is cut. Plate is positioned in such a way, that a falling beam of millimeter-long waves falls at an angle of 45° relatively to plate surface. Polarization of falling beam is parallel to plate surface. When direction of plate is such, that electric field is perpendicular to slits (i.e. electric field is directed transversely to lesser dimension of slits), plate transfers almost 100% of falling power. If the plate rotates around its axis for 90° (while keeping angle between falling beam and plate equal to 45°) in such a way, that falling electric field is parallel to slits, then plate transfers 0% and reflects almost 100% of falling power at an angle of 90° relatively to falling beam. By changing rotation angle between 0° and 90° both reflected and passed power can be continuously varied between values 0% and 100% from falling power. Light divider has cooling device for taking heat, absorbed from magnetic waves, away from edge of metallic plate.

EFFECT: continuous variation of reflected and passed power.

11 cl, 15 dwg

Display // 2321036

FIELD: image generation devices - displays.

SUBSTANCE: claimed device contains a light source, liquid-crystalline panel, and also redirecting film and stack of optical wave conductors positioned between the first two parts, where optical wave conductors are made in form of films, first ends of which are oriented towards the light source, and second ends are extended relatively to one another with creation of toothed surface, which is connected to first toothed surface of redirecting film, second surface of which is connected to liquid-crystalline panel, where the teeth of both connected surfaces have to faces.

EFFECT: increased brightness of image.

6 cl, 2 dwg

FIELD: optics.

SUBSTANCE: light conducting optical element, which includes at least one light supplying base, which is equipped with at least two surfaces located parallel to each other; optical means that are used for entering light beams into the base by total internal reflection so that the light would strike one of the above surfaces, set of one or more partially reflecting surfaces located inside of the base, the surfaces of which are not parallel to the above base surfaces; the partially reflecting surfaces being flat surfaces selectively reflecting at an angle, which are crossed by part of beams several times before exiting the base in the required direction.

EFFECT: provision of wide field of view and increase of eye movement area with device fixed.

44 cl, 36 dwg

FIELD: physics.

SUBSTANCE: optical substrate contains three-dimensional surface preset by the first function of surface pattern, modulated second function of surface pattern. The first function of surface pattern can be described by length, width and vertex angle with optical characteristics for formation of, at least, one output mirror component. The second function of surface pattern can be described by geometry with, at least, pseudorandom characteristic for modulation of the first function of surface pattern, at least, by phase along length of the first function of surface pattern. At that the phase presents horizontal position of peak along width. The surface of optical substrate creates mirror and scattered light from input light beam. The three-dimensional surface can have value of correlation function which is less than approximately 37 percent of initial throughout the length of correlation about 1 cm or less.

EFFECT: brightness increase is provided.

46 cl, 41 dwg

FIELD: physics.

SUBSTANCE: method for separation of combined surface and volume electromagnet waves of terahertz range, which includes preliminary shaping of groove with smoothened edges on sample surface, at that groove axis is perpendicular to plane of incidence that crosses track of surface electromagnet wave (SEW) rays bundle and having size along track that is less that SEW spread length, and further direction of combined waves to groove, differs by the fact that groove is shaped in the form of regular cone half, axis of which lies in the plane of sample surface, at that angle of SEW deviation from incidence plane that contains volume wave, is equal to the following: γ=arcsin[tg(α)-(π-2)-k'], where α is angle between generatrix and cone axis, k' is actual part of SEW refraction index.

EFFECT: provision of spatial separation of SEW and volume wave by means of SEW direction variation.

3 dwg

FIELD: physics.

SUBSTANCE: optical system of spectrum divider for IR-area of spectrum comprising flat-parallel plate with spectrum-dividing coat installed at the angle of 45 degrees to optical axis differs by the fact that plate is located in convergent bundle of beams in space for objective image, downstream compensator of aberrations is installed comprising two lenses: the first one located along with beams travel is positive with convex first surface and cylindrical second surface, the second one is plano-concave that it inverted with its concavity to image and displaced in meridional plane along with direction perpendicular to optical axis.

EFFECT: creation of optical system of spectrum divider for instruments that operate simultaneously in two different ranges of spectrum IR-area with simultaneous increase of aberrations correction quality and reduction of instrument dimensions.

3 dwg, 4 tbl

FIELD: technological processes, metal working.

SUBSTANCE: invention is related to the field of laser processing of materials, in particular, to device of multiway laser processing and may be used in production of large number of products at single laser complex, also in process of laser cutting, welding, pad welding and selective sintering. Device comprises N+1 lasers of initial beam division system and system of beam convergence, which is arranged in the form of set of N+1 telescopes, every of which is optically connected to laser. Telescopes are arranged with the possibility of independent rotation and displacement in two mutually perpendicular planes.

EFFECT: provision of multiple rise of efficiency of laser technological complexes, reduced power inputs at high quality of product.

1 dwg

FIELD: physics.

SUBSTANCE: device has a laser and, optically connected to the laser, a system for dividing the initial beam, a beam convergence system, galvano scanner with a focus lens and a telescope-radiation homogeniser, fitted on the beam path in front of the system for dividing the initial beam. The system for dividing the initial beam and the beam convergence system are in form of mirror matrices. The mirrors in the matrices have equal surface area and can independently rotate and move in two mutually perpendicular planes. Mirrors in the matrix of the beam convergence system can additionally move in the plane of the matrix.

EFFECT: multiple increase in efficiency of laser beam machines and reduced power consumption at high quality of the product.

1 dwg

FIELD: physics.

SUBSTANCE: method involves image preprocessing using a video processor 13 to eliminate geometric distortions, resulting from the geometry of the optical system; formation of an image of the cabin space on a monitor screen 1 and projection using a reproduction lens 2 onto a holographic diffuser 3, which is an assembly of two diffusers (4, 6), turned about each other and joined by a layer of immersion transparent substance 5, and which forms a scattering indicatrix so as to provide a given viewing area with the required image contrast. Principal beams are directed near the optical axis of the system using a collective lens 7, placed in front of the holographic diffuser. The image is then directed to the viewing area of the driver 12 using a holographic beam splitter 9, placed on the windscreen 10.

EFFECT: increased reliability and provision for safe driving conditions.

2 cl, 4 dwg

FIELD: physics.

SUBSTANCE: mirrors/filters are placed in space so as to create a collinear matrix group of rectangular beams through successive reflections and/or transmissions from several optical frequencies emitted by a defined number of radiation sources. The top step consists of matrix of mirrors/filters with size m x n in p items superimposed with each other. The bottom step is a matrix from m mirrors/filters built into p rows with possibility of addressing outgoing beams to columns of matrices of the top step. The mirrors/filters of the matrices have characteristics which enable transmission of spectra of optical frequencies of the incoming beam or part of it and/or transmission of the spectra of optical frequencies of the incoming beam or part of it to the next mirror/filter.

EFFECT: optimisation of the process of frequency-address light beam routing.

5 cl, 11 dwg

Up!