1513 results about "Divergence angle" patented technology

A displaying optical system is disclosed, which is capable of reducing a speckle noise. The displaying optical system comprises a light source emitting coherent light, a scanning device scanning the light, a first optical system causing the light from the scanning device to form an intermediate image, a second optical system causing the light from the intermediate image to form an image on a real display surface, and an optical element arranged between the first and second optical systems. The optical element widens the divergence angle of the light emerged from the optical element toward the second optical system more than the incident angle of the light on the optical element from the first optical system.

An object of the invention is to provide a laser illuminating device and an image display device that enable to remove speckle noises in a diffraction field and an image field, uniformly illuminate an illumination plane, and realize miniaturization. A laser illuminating device 100 includes a laser light source 3, a first lens 1 including a plurality of microlenses 10 each having a predetermined numerical aperture in an in-plane direction, each of the microlenses 10 being adapted to expand laser light emitted from the laser light source 3 to thereby superimpose the laser light transmitted through each of the microlenses 10; and a second lens 2 having an effective diameter larger than an effective diameter of the first lens 1, and for compensating for a divergence angle of the laser light expanded by each of the plurality of the microlenses 10.

An optical coupling apparatus for coupling a waveguide to a light source, when the light source emits light at a divergence angle that is larger than the critical angle of the waveguide. The optical coupler comprises a plurality of light-guides, preferably cut from the edge of the waveguide. The light-guides are arranged to connect the waveguide to the light source via a plurality of orientations so that the entire divergence angle is covered within the critical angle of the light-guides.

An LED tube lamp includes a heat sink, an LED substrate, a cover fixed to the heat sink. The cover includes a first cover and a second cover, the first cover is closer to the LED substrate than the second cover, and a plurality of lenses are arranged on the surface of the first cover to refract the light beams entering into the first cover. The light beams are scattered by the lenses to enlarge the light divergence angle of the LED tube lamp.

PCT No. PCT/JP96/02391 Sec. 371 Date Apr. 18, 1997 Sec. 102(e) Date Apr. 18, 1997 PCT Filed Aug. 27, 1996 PCT Pub. No. WO97/08463 PCT Pub. Date Mar. 6, 1997Specifications of the impeller and the scroll type casing of a multiblade radial fan comprising an impeller having numerous radially directed blades circumferentially spaced from each other and a scroll type casing accommodating the impeller are determined so as to make divergence angle of the scroll type casing substantially coincide with divergence angle of the free vortex formed by the air discharged from the impeller.

A differential phase-contrast X-ray imaging system is provided. Along the direction of X-ray propagation, the basic components are X-ray tube, filter, object platform, X-ray phase grating, and X-ray detector. The system provides: 1) X-ray beam from parallel-arranged source array with good coherence, high energy, and wider angles of divergence with 30-50 degree. 2) The novel X-ray detector adopted in present invention plays dual roles of conventional analyzer grating and conventional detector. The basic structure of the detector includes a set of parallel-arranged linear array X-ray scintillator screens, optical coupling system, an area array detector or parallel-arranged linear array X-ray photoconductive detector. In this case, relative parameters for scintillator screens or photoconductive detector correspond to phase grating and parallel-arranged line source array, which can provide the coherent X-rays with high energy.

The present invention relates to a beam reshaping device for a plane array semiconductor laser. The device includes a fast axis collimating lens, a slow axis collimating lens, a ladder lens, a first parallelepiped prism unit, and a second parallelepiped prism unit. The beam emitted by the plane array semiconductor laser passes through the fast axis collimating lens and the slow axis collimating lens, and lowers the divergence angle of the fast axis and the divergence angle of the slow axis. The irradiance interspace between bars can be eliminated by the ladder lens and can be compressed in the direction of the fast axis. Finally, part of beam can be moved parallel along the fast axis direction by the first parallelepiped prism unit and the second parallelepiped prism unit, and then be moved along the slow axis direction. Through the above process, the beam is realigned, and the purpose that the quality of the fast axis beam and the quality of the slow axis beam tend to be coincident is reached. The realigned beam can get high-power high-brightness facula after being focused. The optical apparatus used in the present invention is easy to be produced and convenient to be adjusted with simple structure.

The present disclosure illustrates an optical navigation chip. The optical navigation chip is disposed on an optical navigation module. The optical navigation module includes a light-emitting unit. The light-emitting unit provides a light beam to irradiate a surface of a displacement generating unit. The light beam has a low divergence angle to reduce scattering. The optical navigation chip includes a sensing array and a displacement calculating unit. The sensing array is disposed corresponding to the surface. The sensing array receives a reflected light beam which the surface reflects, and captures an image once every capturing interval based upon the reflected light beam. The displacement calculating unit calculates a relative displacement between the optical navigation chip and the surface according to the images.

An illumination system for illuminating an object includes a light source and a lens array system. The light source includes an illumination element emitting light rays and surrounded by a parabolic reflector. The lens array system includes a first lens array plate and a second lens array plate. The first lens array plate includes a matrix of lenslets where, in one embodiment, each lenslet has a shape matching the aspect ratio of the object to be illuminated. The second lens array plate includes a radial pattern of wedge shaped lenslets each corresponding to a lenslet in the first lens array plate. Each wedge shaped lenslet in the second lens array plate has dimensions that are selected to provide a radial and theta collection angles matching the maximum divergence angle of the light source and the maximum divergence angles of the corresponding lenslet in the first lens array plate.

The invention discloses a three-dimensional display device of a full-view visual field based on a high-speed projector. The device comprises a high-speed projector, a transmission type directional diffusing screen, a reflector system, a rotation device, a sensor, a rotation synchronous detection module and an upper computer. The high-speed projector projects combined images of the horizontal 360-degree full-view visual fields of three-dimensional objects on the reflector system rotating at high speed, and the images are projected on the fixed cylindrical transmission type directional diffusing screen after the images realize the turning of light paths by the reflector system. The transmission type directional diffusing screen can control the divergence angle of outgoing light, the left eye and the right eye of an observer see images with different visual angles, and the three-dimensional display of the three-dimensional objects on the full-view visual field is realized. The rotation synchronous detection module detects a rotation signal, is communicated with the upper computer and ensures that the positions of the combined images and the position of the rotating reflector system are synchronous. The invention can realize that both eyes of the observer see images with binocular parallaxes in different positions, thereby realizing the three-dimensional display.

A planar light source device includes a first light source for emitting a first light ray having a punctate spatial luminance distribution; a second light source for emitting a second light ray; a first spatial luminance distribution conversion portion for changing the first light ray to a linear spatial luminance distribution; a second spatial luminance distribution conversion portion for changing a spatial luminance distribution of the first and second light rays to a planar spatial luminance distribution; wherein the first light ray is a laser light; the second light ray has a divergence angle larger than the divergence angle of the first light ray when the first light ray is emitted from the first light source; and a slow-axis direction of the first light ray entering the second spatial luminance distribution conversion portion is parallel to an outgoing direction of the planar light.

The invention provides a multifunctional lighting module, which comprises a first light source for emitting a first light beam, a second light source for emitting a second light beam, and a diffractive optical element, wherein the wavelength of the first light beam is different from that of the second light beam; the diffractive optical element copies and extends the first light beam and the second light beam; a divergence angle of a first incident beam formed by the first light beam is not smaller than an included angle between adjacent diffraction beams formed after the first light beam passes through the diffractive optical element to achieve floodlighting; the divergence angle of a second incident beam formed by the second light beam is not smaller than an included angle between adjacent diffraction beams formed after the second light beam passes through the diffractive optical element to achieve structured lighting. According to the lighting module, two functions of floodlightingand structured light projection are integrated into one module, so that synchronous lighting of floodlighting and structured lighting is achieved; and meanwhile, the multifunctional lighting module has the characteristics of being small in volume and low in power consumption, and is beneficial to integration into intelligent equipment.

The invention provides a dodging special-shaped lens used for shaping semiconductor laser leams. The lens comprises an entrance face receiving laser injection and an exit face allowing laser ejection, the entrance face which is a half-cylindrical curved surface and the exit face which is an aspheric surface are arranged oppositely, and the distance between two ends of a generatrix of the aspheric surface is larger than that of the half-cylindrical surface, so that lasers injected through the entrance face are enabled to be wholly injected onto the exit face. The dodging special-shaped lens is simple in structure, easy for batch processing, low in cost and especially capable of well realizing adjusting of divergence angles of laser beams output by semiconductor lasers of various wavelengths and homogenized adjusting of Gaussian curve distribution of light energy output by lasers, and utilization rate of laser energy is improved while good dodging and aberration-eliminating performances are provided.

The invention provides a laser processing device and a method of the laser processing device. The laser processing device comprises a laser, a lens set, a Dove prism, a plane mirror, a focus lens and a workpiece to be processed which are all sequentially arranged in the direction of an optical axis, wherein the lens set is composed of two lenses, and the distance between the two lenses can be adjusted so that the spot sizes and the divergence angles of outgoing beams of the laser can be adjusted; the Dove lens is installed in a rotary motor and rotates with the optical axis as the center, and the beams going out from the Dove lens also rotate with the optical axis as the center; the plane mirror is used for deflecting the transmission direction of the beams; the position of the focus lens in the beam transmission direction can be adjusted, and the beams are focused on the surface of the workpiece to be processed after passing through the focus lens; the workpiece to be processed is placed on an electric displacement platform and can make two-dimensional movement in the plane perpendicular to the transmission direction of the beams.

A coupling element (14) for use in a touch-sensitive apparatus is arranged to transfer light between an electro-optical device (2) and a panel (4) for light transmission. The electro-optical device (2) is an emitter or a detector and has an operative solid angle given by orthogonal device divergence angles. The coupling element (14) is an optical component with a first light transmission surface (21) for facing the electro-optical device (2), and a second light transmission surface (22) for mounting on the panel (4). The coupling element (14) has an optical structure (23) that directs the light between the first and second light transmission surfaces (21, 22) by one or more reflections while expanding one device divergence angle (αx) into a component divergence angle at the second light transmission surface (22). Thereby, the component divergence angle defines a divergence (φp) in the plane of the panel (4) with respect to light propagating by internal reflections inside the light transmissive panel (4).

An optical coupling element for use in large numerical aperture collecting and condensing systems. The optical coupling element includes a curved surface such as a lens at the output of a tapered light pipe (TLP). The TLP in combination with the curved surface alters the divergence angle and the area of the light exiting the curved surface. Electromagnetic radiation emitted by a source is collected and focused onto a target by positioning the source of electromagnetic radiation substantially at a first focal point of a primary reflector so that the primary reflector produces rays of radiation reflected from the primary reflector that converge at a second focal point of the secondary reflector. The optical coupling element is positioned so that its input end is substantially proximate with the second focal point of the secondary reflector. The converging rays of radiation reflected from the secondary reflector pass through input end and are transmitted towards the curved surface, where their divergence angle and area are adjusted.

An illumination device has a plurality of sealing structures each including a light-emitting diode, sealed by a high refractive index transparent material member which is further sealed by a low refractive index transparent material member. To increase a divergence angle of light radiation, the portion of the high refractive index transparent material member which covers an upper surface of the light-emitting diode is structured so as to satisfy a relation H>(L/2)/tan { sin⁻¹(n₁/n₂)}, where H represents a thickness of the high refractive index transparent material member measured at the central portion of the upper surface of the light-emitting diode, L represents the length of one side of the upper surface of the light-emitting diode, n₁ represents the refractive index of the high refractive index transparent material member and n₂ represents the refractive index of the low refractive index transparent material member.

A LED optical lens and an illumination device thereof are revealed. The optical lens includes a light-source side surface and an image side surface of the LED optical lens that both are designed respectively according to mathematical expressions of freeform surfaces such as Anamorphic formula and Toric formula Thus the optical lens has different curvatures along different axes. After light from LED emitting into the optical lens at a fixed incident angle, emergent light with different divergence angles along different axes is generated. For example, the divergence angle along the long axis is larger than that along the short axis. Therefore a uniform and near rectangular distribution pattern is formed on the target area Moreover, a plurality of optical lenses aligned along the same axes is arranged at a holder to form a lens array. The lens array is used together with a LED array so as to form a LED illumination device.

The invention relates to a monocular vision measuring method for an iron tower. According to the method, the measurement of rod pieces of the iron tower in a full-width photo is realized by the actual length represented by unit pixel distance at a specific position in the photo. The method is finished by the following processes of: camera calibration, camera elevation (vertical angle) measurement, camera visual angle (divergence angle) calculation, image correction and the like, wherein the camera calibration is finished at one time; the image correction, the divergence angle calculation and the like can be finished by computer programs; and therefore, a rapid measurement task is realized. According to the method provided by the invention, the measurement work can be finished rapidly only by using a camera and a range finder; the iron tower only needs to be shot once, and then image calculation and processing are performed in an office, so that the aim of measuring the iron tower is fulfilled without influence caused by charged and weather conditions; much data information is obtained by the measurement; and all rod pieces can be measured at the same time.