76results about How to "Large divergence angle" patented technology

The invention relates to a light emitting diode (LED) with large divergence angle and a surface light source composed of the LED, and belongs to the technical field of photoelectron. The LED with large divergence angle comprises a reflecting cup, an LED chip which is arranged in the reflecting cup and a divergence lens above the LED chip, and the components are encapsulated with resin. The divergent light with uniform distribution is formed when the divergent light of the LED chip and the reflected light out of the reflecting cup pass through the divergence lens. In the invention, the LED light source is arranged in a concave reflector, and the LED surface light source with large divergence angle and light uniformity is formed. Otherwise, the LED with large divergence angle is arrayed to form the surface light source. The reflecting cup with a plurality of light units and the chip are directly connected with the surface light source substrate. The whole divergence lens is covered above the chip, and the emission of the plane light with light uniformity is realized in virtue of the diffusion chip. The large angle LED and the surface light source of the invention can be applied to the backlight field of a lighting and liquid crystal display.

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).

A compact, inexpensive and rugged fiber collimating lens and lens array achieve large beam diameters and provide long working distances. A special single-mode fiber is inserted between a standard single-mode input fiber and a GRIN fiber lens, typically quarter-pitch or slightly longer. The specialty fiber condenses the mode field diameter (MFD) of the beam in the input fiber into its smaller MFD. As a result, the fiber collimating lens provides greater beam expansion due to the larger divergence angle of the specialty fiber, which in turn provides longer working distances.

A large diameter fiber is composed of a multimode optical fiber and provided with a fiber body having a constant diameter in an optical axis direction XA and a tapered section tapered in diameter toward a light exit surface. An adhesive member attaches the large diameter fiber inside a retaining hole of a tubular housing such that an outer circumferential surface of a tapered clad of the tapered section is entirely exposed to air to a predetermined depth from the light exit surface. A light passing space is a ring-like space formed between the exposed outer circumferential surface of the tapered clad and an inner circumferential surface of the tubular housing. Light in the tapered section is output from the light exit surface and partially leaked to the tapered clad. A part of the leaked light is released from the light passing space.

The invention discloses a collimating and beam expanding device for semiconductor laser sources of a laser radar. The collimating and beam expanding device is mainly composed of an aspherical lens, a quartz positive lens, a tunable flange and the like. The collimating and beam expanding device is simple in structure, low in cost and good in beam collimation performance, a divergence angle of a semiconductor laser is compressed from 0.2X0.4rad to below 0.2mrad, and the requirement of the laser radar for probing light sources is met; the device is stable in optical and mechanical properties, can be used under level-18 random vibration at the environment temperature from minus 30 DEG C to minus 50 DEG C, and meets the requirement of the laser radar on stability in bad conditions; the device is provided with the flange, semiconductor laser sources different in divergence angle can be obtained by fine tuning of the flange of the beam expanding device; by tuning of the flange, the device can also be applied to beam collimation of other different-wavelength light sources.

The invention relates to a surface nano grating-based wavelength tunable vertical cavity surface emitting laser and a preparation method, which belong to the field of semiconductor photoelectronic devices. The laser has an inner cavity contact laminated structure; a positive electrode layer (1) is arranged on a P-type ohmic contact layer (5); an air-gap layer (12), a gallium arsenide layer (2a), and a gallium aluminum arsenide layer (2b) are arranged above the ohmic contact layer (5) in turn; a gallium aluminum arsenide oxidation current limitation layer (6), an active region (7), an n-type gallium aluminum arsenide layer (8a), an n-type gallium arsenide (8b), an n-type gallium arsenide substrate (10), and a substrate electrode layer (11) are formed below the ohmic contact layer (5) in turn; and a nano grating (15) is positioned on the surface of the gallium arsenide layer (2a). The thickness of the air-gas layer can be subjected to mechanical adjustment of an electrostatic force and the like, so that photon phase change can be transmitted in the resonant cavity of a laser and an outputted light beam passes through the nano grating (15) immediately; therefore, a wavelength and polarization can be simultaneously controlled.

The invention discloses a display device and a display method, and relates to the field of display technologies. Normal display modes and peep-proof display modes of the display device can be switched over. The display device comprises a peep-proof backlight module, a display panel and an adjusting unit. The peep-proof backlight module is used for emitting peep-proof backlight; the display device can be in peep-proof off states and peep-proof on states; the adjusting unit is used for enlarging divergence angles of the peep-proof backlight to obtain divergent light when the display device is in the peep-proof off states; the adjusting unit is used for keeping the divergence angles of the peep-proof backlight to obtain peep-proof light when the display device is in the peep-proof on states. The display method is implemented by the aid of the display device in the technical scheme. The display device and the display method have the advantage that the display device and the display method can be used for safety display of display equipment.

This invention discloses a double-laser real time measurement of aerofoil deformation, which comprises double-laser real time distance measurement system; data receiving and process system and aerofoil deformation database. It is characterized by the following: the said distance measurement system comprises laser distance meter, reflection mirror; the said data receiving and process system comprises data transmission and conversion system, micro machine computation system; the said aerofoil deformation database comprises detail images of aerofoil deformation and three-dimension data; the said data transmission and conversion system converts the data of the receiving system and then sends them to the micro computation system to get the vertical displacement of the aerofoil top end; to take images and data from the said aerofoil deformation database.

The invention discloses a four-jamming-light-path infrared jamming simulation system using a microlens array as a beam expansion element, and belongs to the technical field of infrared semi-physical simulation. The four-jamming-light-path infrared jamming simulation system comprises jamming light paths, a compound objective lens (5), the microlens array (14) and a collimator objective lens (8) in the direction of the light paths, wherein parallel light beams emitted by the jamming light paths light on the microlens array (14) after penetrating through the compound objective lens (5), convergency of the light beams is carried out through the microlens array (14), collimation is carried out on the light beams through the collimator objective lens (8), and the light beams are received by a seeker. According to the four-jamming-light-path infrared jamming simulation system using the microlens array as the beam expansion element, when the microlens array serves as the beam expansion element, the jamming light beams lighting on the front surface of the microlens array are further converged, the direction of propagation of the light beams is changed, and the angle of divergence of the light beams is enlarged; meanwhile, the collimator objective lens can be filled with jamming light, collection efficiency of jamming light energy is greatly improved.

The invention discloses a high-power LED light fitting, which has excellent heat radiating effect, wide irradiation range, even faculae and smooth transition. The high-power LED light fitting comprises a metal shell (1), an LED light source assembly (2), a transparent protection cover (3) and a reflecting cover (4), wherein the front side of the shell (1) is provided with a light source accommodating cavity (13), the LED light source assembly (2) and the reflecting cover (4) are arranged in the light source accommodating cavity (13), the back side of the shell (1) is provided with a plurality of heat radiating sticks (11) arranged in arrays, the LED light source assembly (2) comprises a plurality of high-power LEDs (21) and a circuit radiating bottom plate (22), a horizontal plane (100) and at least one level inclined planes symmetrically distributed along two sides of the horizontal plane (100) are arranged in the light source accommodating cavity (13), and the circuit radiating bottom plate (22) is contacted and is fixedly connected with the inclined planes and transmits the heat generated by the high-power LEDs (21) to the shell, so that the heat is radiated by the heat radiating sticks (11). The high-power LED light fitting can be widely applied in the field of LED light fittings.

An exemplary light guide plate (21) includes a main body (25) and a protrusion (26). The main body includes a plurality of side surfaces. At least one of the side surfaces is a reflective side surface. The protrusion extends from one of the side surfaces. The protrusion includes a light incident side surface (261) and a reflective side surface (263). The main body defines a light emitting area (27). Incident light beams emitted from the light incident side surface of the protrusion are reflected by the reflective side surfaces of the main body and the protrusion once or more than once. Thereby, the reflective light beams have a divergence angle larger than a divergence angle of the incident light beams. The reflective light beams are transmitted to the light emitting area of the main body and are converted into flat light therein.

The invention is an improvement of a filter drum deduster. The deduster is characterized in that a rigid non-compression eccentric rotating interference compressing piece is used for compressing between an air-out end surface of the filter drum and an overhung pore plate; a cushion space which is not less than 30cm is reserved between the bottom of the filtering drum and the bottom plane of a filtering drum box body; and a filtering air inlet is arranged in the cushion space at the lower part of the filtering drum. According to the deduster provided by the invention, over-diameter particles are ensured not to exist in the filtered gas, the filtering material is prevented from being damaged effectively, the service life of the filtering drum is prolonged, two main defects which are hard to solve by a traditional filtering drum deduster are solved completely, and the effective service life of the filtering drum is prolonged from originally maximum twelve months to eighteen months. A frame type filter is added above a filtering drum air outlet by being connected with a transition section interval, the filter precision of the frame type filter is higher than the filter grade of the lower filtering drum, thereby forming secondary filtration of upper and lower inter-phase serial connection; the minimum filtering precision can be 0.1 microns; the filter drum deduster provided by the invention can be used in the lead-acid battery industry for filtering lead dust and fume, and the dust content of the filtered gas is not more than 0.07mg/m<3>, which is far less than the national emission standard; the filtration resistance is increased by more or less than 10% on the basis of previous grade, so that the contradiction between the filtering precision and the filtering resistance is balanced well.

The invention relates to the technical field of laser radars, and provides a laser radar for long-distance detection and a detection method thereof. An optical fiber laser 2 in the laser radar is fixed on the inner surface of a laser radar body 1, and the optical fiber laser 2 transmits optical energy to an emergent light spot converter 4 through a single-mode optical fiber 3; the emergent light spot converter 4 is used for converting an emergent light spot into a circular light spot; the light path assembly 5 is used for coupling the emergent light spot converter 4, the receiving detector 6 and the light path incident assembly 9, so that emergent light of the emergent light spot converter 4 reaches the light path incident assembly 9 through the light path assembly 5; and an optical signalreceived from the optical path incident component 9 can be transmitted to the receiving detector 6 through the optical path component 5. A light spot conversion system is added, oval light spots areconverted into circular light spots, and uniform detection in all directions of space is easy to achieve.

The invention relates to a light homogenizer and application of an optical fiber panel. Due to the adoption of a charge coupled device (CCD) camera of which the focal length is more than or equal to 16 millimeters, the petal phenomenon is likely to occur after an image is formed within close range by a near-field marker, and the uniformity cannot meet the requirement. In order to solve the problems of petals and particularly the near-field marker, the light homogenizer is arranged additionally on the basis of the original design. The light homogenizer comprises a cylindrical shell (6), wherein a high-uniformity optical fiber panel (7) is arranged at one end of the cylindrical shell, and a luminous combination is arranged at the other end of the cylindrical shell; and the luminous combination comprises a circuit board (4) and a group of luminous devices (1). The light homogenizer is an important facility for solving the problem of uniformity in the near-field marker.

The invention provides a coupler, relating to the optical communication field. The coupler comprises a first light spot zooming zone and a second light spot zooming zone; the first light spot zooming area comprises a first media and a second media packing the first media; a refractive index of the first medial is greater than a second refractive index of the second media; the first media comprises a square surface and a rectangle surface; light goes in and out of the first media through the square surface and the rectangle surface; the area of the rectangle surface is greater than that of the square surface; the second light spot zooming area is positioned on one side of the rectangle surface of the first media; the second light spot zooming area comprises hybrid medium and uniform medium, and the hybrid medium and the uniform medium are arranged by intervals; the hybrid media comprises a third media and a fourth media packing the third media; and the refractive index of the third media is greater than that of the fourth media. The coupler reduces energy loss during an optical coupling process.

The invention provides a light-emitting diode with a light distributing function and a preparation method thereof. The light-emitting diode comprises a heat-radiating panel (1), LED chips (2), a fluorescent powder layer (3), a silica gel packaging layer (4) and electrode leads (5), wherein the LED chips (2) are fixed on the heat-radiating panel (1) and are arranged in an array way; the fluorescent powder layer (3) is coated on the heat-radiating panel (1) and completely covers the LED chips (2); the silica gel packaging layer (4) is coated on the fluorescent powder layer (3); the electrode leads (5) are connected with electrodes of the LED chips (2) and are exposed to the outside; and the silica gel packaging layer (4) is formed by mixing silica gel, nano or silica gel and micron particles. In the light-emitting diode, nano or micro particles are added in the silica gel packaging layer, thereby enlarging the divergence angle, increasing the light-emitting area and enabling the light to be milder.

The invention provides a backlight module and a display device. The backlight module comprises a backlight source and a liquid crystal lens. Light emitted by the backlight source penetrates through the liquid crystal lens when the liquid crystal lens is not in the working state; when the liquid crystal lens works, a concave lens is equivalently formed and used for enlarging the divergence angle of light emitted by the backlight source; the backlight source is located at the object distance position of the concave lens. According to the backlight module, different visual ranges can be increased and can be switched, and therefore the flexibility of a visual effect can be increased.