311 results about "Light cone" patented technology

A light fixture for lighting a wall, including a supporting base and at least one light emitting diode (LED) on the base emitting light in a cone having a central axis. A first reflector is curved between a first lip secured to the base adjacent the LED and a second lip spaced from the base, with the central axis of the cone intersecting the first reflector between the first and second lips. A second reflector defines a reflecting enclosure for and includes first and second generally flat surfaces on opposite sides of the LED and substantially symmetrical about a plane which includes the light cone central axis, and a third generally flat surface intersecting both of the first and second surfaces, whereby the first reflector is oriented to reflect light from both the LED and the second reflector in a beam having a selected shape.

The radiation device has an array (11) of light-emitting diodes (12) providing light beams which are directed onto a focus region (20) at the input end of a light conductor (18), used for directing a focused light beam onto the radiation point. The light-emitting diodes are supported in a planar holder (19) at different inclination angles, for providing a light cone illuminating the light conductor input end from their output beams.

The invention relates to an LED illumination module having an LED (23) and a rotationally symmetrical, integral, light-transparent auxiliary optic (10) having an inner converging lens part (14) and an outer reflector part (16). The auxiliary optic (10) has an opening (11) in the form of a blind hole which is arranged at the rear and in which the LED (23) can be displaced longitudinally and axially along the optical axis (20) such that, owing to the displacement, a change in the cone of light from a cone of light having a cone angle < 12° to a cone angle >20° can be produced and, in at least one LED position with respect to the opening (11) of the auxiliary optic (10), an inner region of the cone of light is illuminated homogeneously over a cross-sectional area at right angles to the optical axis (20).

A laryngoscope has a laryngoscope spatula, a handle, and an illumination device for illuminating the oral and pharyngeal cavity, the illumination device having at least a first light-radiating element, which is arranged on the laryngoscope spatula and, when operating, radiates a cone of light with an angle of beam spread. The illumination device has at least a second light-radiating element, which is likewise arranged on the laryngoscope spatula, and the at least one second light-emitting element radiates a second cone of light with a second angle of beam spread which is greater than the angle of beam spread of the cone of light of the first light-radiating element.

The invention discloses an optical detection device for corona discharge. An atmospheric ultraviolet window band imaging detection optical path thereof comprises a stray light shield, an atmospheric ultraviolet window band ultraviolet lens, an atmospheric ultraviolet window band band-pass ultraviolet filter, an ultraviolet image intensifier, a light cone, a CCD or CMOS area array image sensor, an image processing circuit and a first liquid crystal display which are arranged in sequence. A solar blind ultraviolet band non-imaging detection optical path thereof comprises a total emission mirror, a spectroscope, a solar blind ultraviolet band-pass filter, a solar blind ultraviolet lens, a multiplier phototube, a signal processing circuit module and a second liquid crystal display. The device has the main advantages that the corona detection data is more complete and reliable, and the failure level of corona discharge and discharge degree are convenient to be analyzed.

Provided is a lighting glasses. In one form, an edge supporting arm component is provided with all luminous components which consists of light source used in every edge supporting arm component, power source used for the light source and an electrical connection used for supplying power from the power source to the light source. In the other form, a horizontal supporting rack component comprises an eyeshade part which is integratedly formed at any ends, and the eyeshade is constructed in that diffused light and the problem of flash are prevented. The eyeshade part is obliquely and preferably disposed on the light cone extending surface of the LED light source along the front end part of each edge supporting arm component. In the other form, each edge supporting arm component is provided with a concave cavity disposed on the inner surface of the edge supporting arm component, and a power supply and a switch component are contained in the concave cavity. A switch actuator is disposed on the inner surface part, thereby the switch actuator can be hided to improve the appearance of the glasses.

The invention relates to a coherent three-dimensional display device based on optical wave-front reconstruction, comprising an optical wave-front generator and a first micro lens array plate. The optical wave-front generator is used for generating high-precision conjugate light waves in a small range so that the conjugate light waves are reversibly spread to the first micro lens array plate based on a light path and three-dimensional images are reconstructed in a big range in the sky after the conjugate light waves are focused and scattered by the first micro lens array plate. The first micro lens array plate is used for receiving the conjugate light waves generated by the optical wave-front generator; each micro lens focuses to generate a light cone to increase an observation angle of the three-dimensional images reconstructed based on a light path reversibility principle so that large-size and large-viewing angle three-dimensional display is realized.

The invention belongs to the technical field of optical precision measurement, relating to a method and a device for measuring the thickness of the center of a confocal lens. The method comprises the following steps of: first respectively determining the positions of the front surface vertex and the back surface vertex of a lens according to the confocal focusing principle; obtaining first two position coordinates of locations by confocal measurement; and calculating the thickness of the center of the lens by utilizing the ray tracing formula. Meanwhile, an annular pupil is introduced to a measurement optical path to block paraxial rays and form a hollow measuring light cone, thereby reducing the effect of aberration on measurement results. The device comprises a light dividing system, an objective lens, a confocal system, a length measurement system and a movable guideway, wherein the light dividing system, the objective lens and the measured lens are sequentially arranged in the direction of emergent ray of a collimation light source; and the confocal system is arranged in the reflection direction of the light dividing system. The surface of the measured lens and the light dividing system reflect light to the confocal system and cooperate with the confocal system to realize accurate positioning of the front surface vertex and the back surface vertex of the measured lens, so that non-contact precision measurement of the thickness of the center of the lens is realized.

The invention discloses a large field-of-view bionic compound eye visual system adopting a dome light cone. The system comprises a curved surface compound eye lens, an aperture diaphragm, the light cone and an image detector, which are connected with one another in sequence; the curved surface compound eye lens comprises sub eyes and a substrate, the sub eyes are hermetically bonded in the hexagonal array mode, the surface type of the sub eyes are non-spherical, the substrate is a curved surface substrate, the aperture diaphragm is a stepped type aperture diaphragm, and the light cone is a dome light cone. According to the invention, the dome light cone coupling strategy is used as the light path conduction mode, on one hand, a curved image formed by the compound eye lens is converted into a planar image, so as to be received by a plane detector, on the other hand, the large field of view image formed by the compound eye lens is compressed into a smaller image according to an equal ratio, so that the large field of view image can be completely imaged in a small-sized detector in a lossless mode, the coupling is realized, and the technical requirements on the size of detectors are accordingly reduced.

The invention is characterised by the provision that in a slit lamp or a slit lamp projector an oblique thin glass flat with a partial reflection of the light is disposed at a defined angle relative to the optical path above the filter assembly between the latter and the "slit projector" lens (4), and in the configuration with an achromatic doublet lens between the lens assemblies in the parallel optical path, in such a way that as a result one part of the incident rays is incident as deflected light cone on a detector assembly which is arranged laterally in the housing at an angle dependent on the angle of the thin glass flat in the housing, which detector assembly measures the respectively existing luminous intensity, transmits the detected values to an evaluation and control means which compares the values so received against a predetermined maximum value, calculates the irradiation dose for the phakic or aphakic eye and, when the value is exceeded, signals this situation on an indicating alarm means and/or reduces the luminous intensity automatically to the predetermined maximum value in a controlled manner.

The invention, which belongs to the photoelectric imaging technology field, relates to a multispectral stripe tube three-dimensional lidar imaging apparatus. The apparatus comprises: a multi-wavelength laser, a beam expanding prism, a reception telescope, a diffraction grating spectroscope, a convex lens, optical filters, a stripe tube, a coupling light cone, and a CCD camera. A mixing multi-wavelength laser beam that is emitted by the multi-wavelength laser passes through the beam expanding prism and then is shot at an object and is reflected; the reflected laser beam is received by the reception telescope and is gathered to the diffraction grating spectroscope; and then the gathered laser beam passes through the convex lens and is focused on the optical filters; the focused laser beam bombards a photoelectric cathode of the stripe tube to generate a plurality of electron beams though a slit and the plurality of electron beams bombard a fluorescent screen in the stripe tube; and then a multispectral strip image is coupled through the coupling light cone and is imaged on the CCD camera. According to the invention, a multi-spectral detection technology is integrated into a stripe tube lidar imaging apparatus, so that accuracy of object imaging and richness of information are improved; and a specific wavelength can detect a weak signal; therefore, an application arrange of the stripe tube lidar imaging detection apparatus is expanded.

A display system is disclosed that includes a light source, an integrator rod receiving a light beam from the light source and producing an integrated light beam, a beam splitting device splitting the integrated light beam into at least a first cone of light and a second cone of light, the cones of light having complementary intensity distributions, and at least a first spatial light modulator and a second spatial light modulator, wherein the first spatial light modulator is capable of selectively reflecting portions of the first cone of light in an ON direction and the second spatial light modulator is capable of selectively reflecting portions of the second cone of light in an ON direction. The display system further includes a combining device for combining the selectively reflected portions of the cones of light in the ON direction and projection optics for projecting the combined reflected cones of light.

The invention belongs to the technical field of optical precision measurement, relating to a method and a device for measuring the central thickness of a differential confocal lens. The method comprises the steps of: firstly, respectively determining the positions of a vertex at the front surface and a vertex at the rear surface of a lens to be measured through a differential confocal and fixed-focal principle and obtaining position coordinates positioned two times by a differential confocal measuring head; and then calculating the central thickness of the lens by utilizing a ray tracing formula. Meanwhile, an annular pupil is introduced into a measuring optical path to shade a paraxial ray and form a hollow measuring light cone, which lightens the influence of aberration on a measuring result. The device comprises a beam splitting system, an objective lens, a differential confocal system, a length measuring system and a mobile guide rail; wherein the beam splitting system, the objective lens and the lens to be measured are sequentially placed in an emergent ray direction of a collimation light source and the differential confocal system is placed in the reflecting direction of the beam splitting system. By utilizing the differential confocal light cone to accurately position the surface of the lens, the invention realizes the non-contact high precision measurement of the central thickness of the lens.

The invention relates to method and device for measuring an optical axis and a gap of a lens group by a differential confocal internal focusing method, belonging to the technical field of optical precision measurement. The method comprises the following steps of: firstly accurately regulating the optical axis of the measured lens group by combining an internal focusing objective with an autocollimation method; then realizing the high-accuracy positioning of each surface of the measured lens group by utilizing a differential confocal focus-fixing principle, and acquiring a numerical aperture angle of a differential confocal light cone positioned on each positioning point; finally sequentially calculating each gap of the measured lens group by utilizing a ray tracing recursion formula, and also leading an annular optical pupil into a measuring optical path to form a hollow measuring light cone so as to reduce the influence of astigmation on a measurement result. The invention combines a differential confocal technology with an internal focusing technology, has high measurement accuracy, high speed, simple system structure, long working distance, no need for disassembling the measured lens group in a measuring process, and the like and can be used for the non-contact high-accuracy measurement of the optical axis and the gap of the lens group.

The invention relates to a receiving device for three-dimensional (3D) multispectral detection of a stripe tube laser radar and belongs to the technical field of photoelectric imaging. The receiving device comprises a receiving telescope, an optical splitting grating, a multi-wavelength transformation system, a collimating micro lens array, a strip tube, a coupling light cone, a charge coupled device (CCD) camera and a computer, wherein the multi-wavelength transition system is formed by a photoelectric detector array, a transresistance amplifier array, a transconductance amplifier array and a vertical cavity surface laser emitter array. The receiving device solves the problem caused by multi-wavelength transformation of a stripe tube laser radar 3D multispectral detection system, transforms multi-wavelength laser containing target multiple spectra and 3D information into laser with wavelengths which a photoelectric cathode of the strip tube corresponds to, has the advantages of being high in transformation efficiency and wide in transformation band, and can be widely applied to the 3D multispectral detection of the stripe tube laser radar.

The invention, which belongs to the field of laser radar detection, proposes a two-dimensional MEMS scanning galvanometer laser radar system, thereby extending a receiving field of view and increasinga signal-to-noise ratio. A two-dimensional MEMS scanning galvanometer is a scanning mechanism. A control system controls the laser to emit high-frequency pulsed laser; the returned laser signal lightpasses through a filter and a large relative aperture optical lens successively and then is imaged on the incident end face of an image transmission fiber light cone; the image transmission fiber light cone transmits to the surface of an APD array detector. The image transmission fiber light cone is formed by arranging a cone-shaped optical fiber bundle. The APD array detector selects a corresponding APD detector unit to collect signals according to scanning angle of the two-dimensional MEMS scanning galvanometer and the position of a light spot outputted by corresponding echo light at the image transmission fiber light cone. Therefore, , when the caliber, focal length, and detector area of the receiving optical system are certain, the field of view of the MEMS laser radar can be extended, the interference of the ambient background light on the system can be reduced, and the signal-to-noise ratio of the signal receiving can be improved.

The invention belongs to the technical field of optical precision measurement and relates to an optical axis and thickness measurement method and a device of a differential confocal internal-focusing lens. By means of an internal-focusing objective lens, the method utilizes an auto-collimation method to adjust the optical axis of the lens precisely; utilizes the characteristic that when a differential confocal response curve passes the absolute zero point, the vertex of a differential confocal light cone and the surface vertex of the lens to be measured can coincide to achieve the precise positioning of the surface vertex of the lens and to obtain a numerical aperture angle of emergent lights in two-time positioning of the vertex of the differential confocal light cone; and utilizes a ray tracing formula to calculate the central thickness of the lens. Meanwhile, an annular pupil is introduced during the light path measurement, the influence of aberration on a measurement result is reduced. By combining differential confocalization with internal focusing for the first time, and providing optical axis and thickness measurement principle of the differential confocal internal-focusing lens, the lens optical axis and thickness measurement method and device of the differential confocal internal-focusing lens has the advantages of being high in measurement speed, high in precision, high in sensitivity, simple in structure and long in working distance, and is applicable to non-contact high-precision measurement of the light axis and the central thickness of lens.

The invention discloses a laser source device. The laser source device comprises a laser device emitting lasers of at least one color, a wavelength conversion part used for being excited to generate fluorescence of at least one color, a light beam convergence part, a light cone part and a light uniformizing part. The light beam convergence part is used for converging the lasers emitted by the laser device to the wavelength conversion part. Use of multiple lenses in the light beam compression process is reduced. The light beam convergence part comprises a light reflection hook face. The laser device and the wavelength conversion part are both located on the same side of the light reflection hook face. The space of the light path along which the lasers are emitted to the wavelength conversion device is compressed. The light cone part is used for conducting divergence angle compression on combined light beams of the lasers of at least one color and fluorescence of at least one color, use of collimation and convergent lenses is reduced, compression light routes of the combined light of the lasers and the fluorescence are simplified. The light uniformizing part is used for outputting light beams output by the light cone part in a uniformized mode. By means of the laser source device, light path elements can be reduced, the space of the light path is compressed, the structure is simplified, and miniaturization requirements are met.

A lighting device with variable angle of emission includes a light source, and a lens system comprising two lenses, a primary lens and a secondary lens. The two lenses and the light source are arranged along an optical axis and the distance between the primary lens and the secondary lens is variable, in order to vary the angle of emission of the cone of light rays generated by the lighting device. In one example, the primary lens has a numerical aperture of at least 0.7, the primary lens is an aplanat, and the secondary lens is designed so as to image to infinity, at a certain distance of the secondary lens from the primary lens, a virtual image of the light source generated by the primary lens. According to a second aspect, the illumination factors are distinguished by the fact that the primary lens has a numerical aperture of at least 0.7, and that the secondary lens may be moved by a distance extending in a range in which the secondary lens does not capture the whole of the cone of light rays generated by the primary lens.