105results about How to "Shorten the optical path" patented technology

The invention discloses an ultra-short-focus projection lens, and belongs to the technical field of projection. The ultra-short-focus projection lens comprises a refractor group and a reflector group. After an image beam passes through the refractor group, the first imaging is carried out between the refractor group and the reflector group, and is reflected by the reflector group to a projection screen to form second imaging. The refractor group comprises a first lens group and a second lens group, wherein the first and second lens groups are respectively provided with two aspherical lenses. The reflector group comprises a first reflector which is disposed behind the second lens group. The refractor group and the reflector group are located on the same primary optical axis. The offset of an image formed by the second imaging relative to the primary optical axis is 140%-150%. The projection lens provided by the invention can achieve the projection of a short-focus large-size image, has a better capability of aberration correction, and can improve the projection imaging quality.

A multi-channel fiber bragg grating absolute wavelength demodulation system based on a single detector comprises a broadband light source, a circulator, reference fiber bragg gratings, a 1*N optical switch, N-path sensing fiber bragg grating arrays, a tunable filter, a photoelectric detector and a data acquisition card. The invention simultaneously provides a demodulation method based on the system. The method is characterized in that the broadband light source generates light; the light passes through the circulator, then passes through the two reference fiber Bragg gratings and then is divided into transmission light and reflected light; the transmission light enters into the 1*N optical switch; a gating signal generated by the data acquisition card makes the light enter into a corresponding sensing fiber bragg grating channel; the reflected light enters into the tunable filter via the circulator; reflected light of a sensing fiber bragg grating also enters into the tunable filter via the circulator; frequency sweeping light is received by the photoelectric detector; a spectrum signal is converted into a time domain signal; then demodulation is performed so that a relative position of the reference fiber bragg gratings and the sensing fiber bragg grating is acquired. By using the system and the method of the invention, the system structure can be simplified and a wavelength measurement error caused by optical fiber transmission is eliminated.

The invention discloses a time-domain-pump-probe optical delay scanning device and a time-domain-pump-probe optical delay scanning method. The optical delay scanning device comprises a linear translation platform, and a pump light reflector set and a probe light reflector set which are arranged on the linear translation platform in a back-to-back way, wherein both arrangement directions of the pump light reflector set and the probe light reflector set guarantee that the incidence direction or the emergence direction of the light is consistent with the movement direction of the linear translation platform. When time-domain-pump-probe is performed, optical delay scanning is simultaneously performed on a pump light beam and a probe light beam, the problem of limitation of an optical delay scanning range in the time-domain-pump-probe to the movement range of the linear translation platform is solved, the requirement on travel of the linear translation platform is greatly reduced, or the optical delay scanning range is greatly expanded under the condition that the travel of the linear translation platform is not changed.

The invention provides an optical path adjusting device and method. The optical path adjusting device adjusts the relative position of a first prism and a second prism in a self-reference interferometer so as to accurately adjust an optical path, and prevents a self-reference interference aligning system using the self-reference interferometer from generating zero-order light leakage due to a combined error of the first prism and the second prism so as to further increase the contrast of an aligning signal.

The invention discloses an intelligent identification device of yellow rice wine age based on near-infrared spectra, which is characterized by the following: placing the photoelectric sensor and detecting platform with detecting clamp in the incubator; setting the light source and filter piece of near-infrared luminescent diode on the left side of detecting clamp at the neck position; placing the optical lens at the right side of detecting clamp; opposing the exit face of optical lens to the receiving face of optical fiber; connecting the exit end of optical fiber with the input end of photoelectric senor; setting the exit face of filter piece to oppose the receiving face of optical lens at the same axle through the detecting clamp; loading the temperature sensor and workpiece detector on the side of detecting clamp from the bottom of optical lens sequently. The invention solves the problem of inaccurate wine age identification result when the light splitter rotates in different temperature conditions.

The invention discloses a multi-channel high-density wavelength division multiplexing high-speed optical device. The optical device comprises a laser module, an optical path conversion module, a wavelength division multiplexing module, an optical fiber coupling module and an optical fiber which are sequentially arranged along the optical axis direction. The optical device is characterized in thatthe wavelength division multiplexing module comprises a first Z-Block module with four channels and a second Z-Block module with four channels; eight paths of divergent light emitted by the laser module are converted into eight paths of parallel light through the light path conversion module; and eight paths of parallel light are divided into two groups according to four paths as a group, one group of coupled light passes through a first Z-Block module and then is combined into one path, the other group of coupled light passes through a second Z-Block module and then is combined into a secondpath, and two paths of light from the first Z-Block module and the second Z-Block module pass through a wave combining module and then are combined into one path. The multi-channel high-density wavelength division multiplexing high-speed optical device can greatly shorten the optical path.

The present invention provides a compact three-dimensional wavelength division multiplexing/demultiplexing device and an implementation method thereof. The compact three-dimensional wavelength division multiplexing/demultiplexing device comprises a microring resonator, a micro-strip metal coil, and two bar-type strap straight waveguides arranged at two sides of a nonreciprocal microring resonator,coupled with the microring resonator and configured to perform optical signal input/output; the two ends of the two bar-type strap straight waveguides are respectively provided with first, second, third and fourth optical signal output/input ports, and uniform waveguide Bragg reflection gratings are etched at the second port; the microring resonator comprises a microring bending waveguide and a magnetic rotary medium arranged at the inner wall of the microring bending waveguide, and an external static magnetic field required by work of the magnetic rotary medium around the current passing through in the metal coil is generated. The current direction in the metal micro-strip metal coil is changed to achieve the switching of the system between the three-dimensional wavelength division multiplexing device and the demultiplexing device. The compact three-dimensional wavelength division multiplexing/demultiplexing device and the implementation method thereof are simple in structure, high in isolation, low in power loss, little crosstalk, compact and convenient to integrate, can achieve large-scale optical waveguide integration, can perform batch production to reduce the cost and is easy to promote and apply.

The invention relates to the technical field of biomedicines and in particular relates to a full-automatic medical fluorescence PCR (Polymerase Chain Reaction) analysis system based on a POCT (Point-of-care Testing) mode. The system comprises a PCR instrument and a client, wherein the PCR instrument is used for amplifying DNA through a PCR reaction; the PCR instrument is further used for performing fluorescence detection on the DNA, generating fluorescence images and transmitting the images to the client; and the client is used for analyzing the fluorescence images and generating analysis results. According to the full-automatic medical fluorescence PCR analysis system based on the POCT mode provided by the invention, the defects that the traditional gene detection process is complicated, the cost is high and the waiting cycle is long can be overcome.

The present invention relates to an optical path variable plate-type microalgae culture reactor, which comprises a ventilation device and an optical path adjustable photo biological reaction system during a culture process, wherein the ventilation device comprises a flow meter, a ventilation pipe and an aeration device, and the introduced gas is air containing a certain concentration of carbon dioxide (0.04-10% by mass). According to the present invention, the culture device is the simple flat plate-type photobioreactor with the lined transparent plastic bag, and during the culture process, along with the increase of the microalgae cell concentration, the distance between the baffles of the plate-type reactor is changed so as to continuously change the optical path, such that the requirement of the algae cell growth on the optical energy can be met, and the reactor is especially for the culture using sunlight as the optical source.

The invention discloses a laser light source, which comprises a laser source, a first concentration module, a first diffusion sheet, a first focusing module, a fluorescent powder wheel, a second focusing module, a light stick, a diffusion unit and a light splitting switch element, wherein in a state I, the light splitting switch element reflects laser, used for stimulating fluorescent powder, fromthe first diffusion sheet to the second focusing module; in a state II, the light splitting switch element reflects the laser from the first diffusion sheet to the second focusing module. The invention further discloses a laser light source control method, which comprises the following steps: Step I, adjusting the light splitting switch element to the state I; Step II, outputting light emitted bythe fluorescent powder wheel, or outputting light which is emitted by the fluorescent powder wheel and filtered by a region corresponding to a filter wheel, or outputting light which passes through asecond diffusion sheet; Step III, adjusting the light splitting switch element to the state II; Step IV, outputting the light emitted by the laser source. The laser light source is simple in structure, small in size and high in optical efficiency and can be compatible with various light source schemes.

The present invention discloses an illumination system for improving the collimation efficiency based on a Fresnel lens. The illumination system comprises light sources with different wavelengths, each light source is provided with a convergent lens, and the light rays emitted by a first light source, a fifth light source and a third light source pass through the convergent lenses and first dichroscopes respectively, and then the light rays at different angles are collimated through the Fresnel collimating lens; the collimated light rays pass through a second dichroscope , the light rays emitted by the fourth light source pass through the convergent lens and then pass through the second dichroscope, the second dichroscope enables the two kinds of light rays to form a light beam and converges the light beam into a dodging system, and the light beam sequentially passes through the dodging system, a light valve system and a projection system and is finally projected on a screen.

The invention discloses a profiled high-screen-occupation-ratio backlight module and a control method thereof. The backlight module comprises a light guide plate and a light source arranged on the light incidence side of the light guide plate. The light guide plate comprises a first light-exiting surface located on the upper part of the light guide plate, and two second light-exiting surfaces located at the lower part of the light guide plate. A space for setting a virtual key is arranged between the two second light-exiting surfaces. According to the technical scheme of the invention, two second light-exiting surfaces are additionally arranged at the bottom of the module, so that the screen occupation ratio is increased. The first light-exiting surface is arranged above the two second light-exiting surfaces. In this way, the optical path is shortened and the frame area is reduced. Therefore, the area of the first light-exiting surface is increased, so that the screen occupation ratio is further increased. In general, the screen occupation ratio is increased by more than 10%, so tputat the visual experience of consumers is more optimized. The on and off states of the first light-exiting surface and the second light-exiting surfaces can be respectively controlled. When only the second light-exiting surfaces are put to use, only a portion of LED lamps are running. Therefore, the power consumption is reduced and the electric quantity is saved.

The invention provides a color film substrate and a display device. The color film substrate comprises an underlayer substrate, a color film layer, a plurality of texture recognition units; the colorfilm layer is arranged on one side of the underlayer substrate and comprises a black matrix and a plurality of color filters; the plurality of texture recognition units are arranged on the underlayersubstrate, each texture recognition unit comprises a thin film transistor and an optical sensor, and the orthographic projections of the texture recognition units on the substrate are located in the orthographic projection of the black matrix on the substrate. The texture recognition units are designed on the color film substrate, so that the optical path between an optical sensor and the surfaceof a finger can be effectively shortened, an acquired optical signal is enhanced, and meanwhile, the noise of the optical signal transmitted between LCD layers is greatly reduced; and meanwhile, LCD light transmittance is not influenced.

The invention relates to a device for water-surface aquaculture engineering, which is applied to the large-scale culture of algae, mussels, abalones, sea cucumbers, crabs, fish and shrimps on open water surface such as sea surface. The device comprises a net-shaped base support formed by ropes with floaters in spaced regular arrangement, a support formed by pipes, a pile-cable unit, and a culture vessel supported by the supporting units and fixed by the pile-cable unit. The net-shaped base support with floaters is fully or partially separated from the culture vessel and other floater supports, thereby forming a 'floating-pipe movable base' culture device. The pipe-based support has multiple units in geometric shape. The multiple units of the pipe-based support are in detachable arrangement and connected to one another, and serve as gas passages to form a part of a gas distributor. The device is applied to the large-scale culture of aquatic animals on open water surface and has the advantages of low cost, firm structure, resistance to wind and waves, and convenience for installation and removal of large-area culture vessels.

The invention discloses a cover plate, a manufacturing method thereof and a display panel. The cover plate comprises a first substrate, a light condensation structure and a flat layer, wherein the light condensation structure is arranged on the first substrate, and the flat layer covers the light condensation structure and the substrate; and the light condensation structure is made of first photoresist, the flat layer is made of second photoresist, a refractive index of the second photoresist is smaller than that of the first photoresist, and the flat layer covers the light condensation structure and the substrate. According to the cover plate, the manufacturing method thereof and the display panel, the sensitivity and the precision of a photosensitive device can be improved.