43results about How to "Solve dispersion" patented technology

The invention relates to a lens including a light input surface and a light output surface. The light output surface is opposite to the light input surface. A central region of the light output surface has a plurality of cylindrical surface microstructures. A depth of the cylindrical surface microstructures in a direction parallel to an optical axis of the lens is within a range from 0.02 millimeter to 0.2 millimeter. A vehicle lamp module is also provided.

Leak of a metered resin by backflow in injection filling is prevented not depending on reverse rotation of a screw but by closing a ring valve by controlling a screw forward movement speed in injection filling. An injection filling speed and a valve closing operation speed are set to the screw forward movement speed. The valve closing operation speed is different from an initial speed of the injection filling speed, and the operation time thereof is set to the time necessary for moving the injection screw by a distance capable of performing the valve closing after the end of metering. The valve closing is performed with the set operation speed and the set operation time.

A Damman grating beam splitting and angular dispersion compensation method of a femtosecond laser pulse, the steps are as follows: 1. According to the needs of the number of split beams, select a piece of Damman grating beam splitting femtosecond laser pulse to ensure that the beam is vertically incident; The diffracted beam of the mth diffraction order after the beam passes through a compensation grating placed in parallel and whose space period is one-mth of the space period of the Damman grating, which eliminates the difference of different diffraction angles of each spectral component on the diffraction order; 2. The vertical distance between the compensation grating and the Damman grating should be able to ensure that the beams of each diffraction order can be completely separated; 3. Repeat step 2 to compensate all the diffracted beams after beam splitting. This method eliminates the angular dispersion of each beam after beam splitting, and restores the shape of the imaging spot; in the range of about 100 fs, its pulse width and beam shape can be kept roughly unchanged.

The present invention relates to a method and apparatus for generating a high power vortex laser. The invention mainly uses a continuous surface deformable mirror to fit the annular helical shape, and can directly generate a high-power vortex laser for the annular light field emitted by the unstable cavity laser. For the solid light field emitted by other lasers, it needs to be preset. It is shaped into a ring light field, and then loaded on a continuous surface deformable mirror to generate a high-power vortex laser. There is an adaptive optics system in the device, which can correct the aberrations of the system and the input light field before generating the high-power vortex laser, and obtain a high-quality incident light field. This method uses a ring-shaped optical field to generate a vortex laser, which has the advantage of suppressing side lobes. The continuous surface deformable mirror can also withstand high-power lasers. The reflective structure can also solve the problem of broadband laser dispersion. The surface shape is flexible and can generate different mode of the vortex laser. The method is simple to operate and has great application prospects in the fields of optical processing and particle trapping.

The present invention discloses a kind of display. The D / A converter has built-in transfer function and can generate different practical operation voltage or operation current to source driving devices of different primitive colors by means of the shared reference voltage source or current source. The practical voltage derived based on the transfer function makes source driving devices of different primitive colors possess relation curve between practical operation voltage and brightness approaching identical, so as to solve the problem of dispersion of different displays corresponding to source driving devices of different primitive colors.

The invention discloses an LED light source far and near beam integrated car lamp module, comprising a low beam light source, a low beam concentrator, a high beam light source, a reflector and a convex lens, and the low beam light source is arranged on the low beam concentrator At the optical origin of the tail end, the front end of the low-beam concentrator is provided with a light-emitting surface, and the light-emitting surface is provided with a cut-off line forming a line for the low-beam light shape, and the convex lens is arranged in front of the light-emitting surface. Below the afterbody of the low-beam concentrator, a high-beam light source and a reflector are provided, and the reflector includes some ellipsoidal reflection bowls, and openings are provided on the top and the front of the ellipsoidal reflection bowl, and the high-beam light source is arranged on At the first focus of the ellipsoid reflective bowl, the second focus of the ellipsoid reflective bowl is set on the cut-off line forming line, and the focus of the convex lens is set on the cut-off line forming line. The present invention seamlessly connects far and near light shapes, is not prone to wear and tear failure problems, and has high comprehensive performance and optical efficiency of the module system.

The invention provides a multi-gap liquid crystal display panel and a manufacturing method thereof. The manufacturing method comprises the following steps: providing a first substrate which is provided with a first pixel area, a second pixel area and a third pixel area; orderly forming a first dielectric layer and a second dielectric layer which are covered on the first pixel area, the second pixel area and the third pixel area; removing the second dielectric layer which is positioned on the second pixel area and the third pixel area; removing the first dielectric layer which is positioned onthe third pixel area; assembling a second substrate on the first substrate so as to form a first gap, a second gap and a third gap on the first pixel area, the second pixel area and the third pixel area between the first substrate and the second substrate respectively; and filling a liquid crystal layer between the first substrate and the second substrate. Different unit cell gaps are produced inthe pixel areas with different colors, so that the penetration rates of different color light tend to be consistent so as to solve the problem of chromatic dispersion.

The invention provides radio over fiber communication technology with high linearity and dispersion resistance. The technology comprises the following steps: incident light carriers are evenly divided into two paths on a mother modulator of double parallel strength modulators to be transmitted on upper and lower arms of the mother modulator. The light carriers transmitted on the upper arm are modulated by radio frequency signals when passing by a sun strength modulator 1. The amplitudes of the radio frequency signals loaded on two electrodes of the sun strength modulator 1 are the same, the phase angles are respectively 102.27 degrees and 180 degrees, a certain bias voltage is loaded, so that the light signals transmitted on the upper arm of the sun strength modulator 1 deviates for 102.27 degrees relative to the lower arm. In addition, when the light carriers transmitted on the lower arm of the mother strength modulator pass by the sun strength modulator 2, no signal or bias voltage needs to be loaded, but a bias voltage needs to be loaded to the lower arm of the mother strength modulator, so that the light carriers transmitted on the lower arm shift for 245.26 degrees relative to the incident light carriers. Finally, the light signals modulated by the mother modulator are transmitted by an optical fiber and are detected. Therefore, the system has the properties of high linearity and dispersion resistance.

The invention discloses a head-mounted display device based on a holographic waveguide, which comprises an in-coupling grating (1), a deflection grating in the left field of view (2), a deflection grating in the right field of view (3), and an out-coupling grating ( 4), rectangular waveguide (5); in-coupling grating (1), left-field deflection grating (2), right-field deflection grating (3), out-coupling grating (4), attached to the rectangular waveguide (5 ) on the upper or lower surface; the in-coupling grating (1), the left-field deflection grating (2), the right-field deflection grating (3), the out-coupling grating (4), and the rectangular waveguide (5) are pasted on The surface or subsurface is determined by the design direction of the entrance and exit pupil rays. The invention uses the pupil reshaping method to solve the separation of the field of view in the case of a large field of view angle produced by the traditional two-dimensional pupil expansion method.

The invention discloses a total reflection wide band multi-spectral imaging system which belongs to the technical field of imaging spectroscopy. The system consists of a pre-reflective imaging objective lens, reflective filter imaging, filter control, focal plane array detector imaging, data processing and a system. The total reflection wide band multi-spectral imaging system provided by the invention can simultaneously detect the two-dimensional high spatial resolution image and multi-spectral image of a target in the working range of ultraviolet and near infrared, overcomes the problems of aberration, chromatic aberration, registration and the like of the introduction of a transmission filter of a conventional transmission filter type multi-spectral imaging system, overcomes the problems of slit and low luminous flux and spectral sensitivity in a traditional grating spectral system, and can be widely used in spectral color high-fidelity reproduction, wide-band print quality detection, biomedical multi-spectral imaging, multi-spectral remote sensing and other fields.

The invention, which belongs to the technical field of wireless communication, discloses a dielectric filter with a hybrid coupled structure. The dielectric filter is composed of a dielectric filter body and two signal input and output ports arranged at the two ends of the dielectric filter body, wherein the two signal input and output ports are 50-ohm coaxial interfaces. The dielectric filter body consists of a box body and a cover plate arranged above the box body; five metal cavities are arranged in the box body continuously, a resonator is arranged in each metal cavity, and the metal cavities are connected by coupling windows; and tuning bolts and coupling rods are arranged in the coupling windows. According to the invention, transmission in different modes can be controlled; the transmission of the main mode is the largest while the losses are not reduced; and the higher mode of the dielectric filter is suppressed effectively and the good far band performance is realized. Meanwhile, with introduction of mixed coupling, a problem of poor high-end frequency response of the dielectric filter due to the chromatic dispersion is solved.