32results about How to "Spectrum adjustable" patented technology

The invention discloses a single rotary combined gas explosion sound source, which belongs to the technical field of mine countermeasures. The gas explosion sound source includes a servo motor, a rotor, a stator housing, a piston and a piston cylinder; the cavity part of the rotor with a release hole is inserted into the interior of the stator, and the two ends of the piston are respectively located in the rotor and the piston cylinder, and the piston cylinder and the stator The shells are coaxially docked; the high-pressure gas inside the rotor will be released through the periodic opening and closing of the corresponding release holes on the rotor and stator, and a series of broadband oscillating sound wave pulses will be generated in the water; by adjusting the displacement of the piston in the rotor Control the number of ports opened by the rotor to adjust the intensity of the sound source; the rotor is driven by the servo motor to rotate, and when the release hole opened by the rotor coincides with the release hole of the stator, pulses of a specific frequency spectrum are generated, and the ports opened by the rotor are in continuous emission. Continuously changing to achieve smooth control of the spectrum. The invention can effectively simulate the physical field produced by the ship.

The invention discloses fluorescent materials with an aggregation-induced emission effect and circular polarization and a preparation method of the fluorescent materials. The general structural formula of the fluorescent materials is shown in the description, wherein R represents any one of H, phenyl, C1-C2 alkoxy substituted phenyl, C1-C3 alkyl substituted phenyl, trifluoromethyl substituted phenyl, thienyl, C1-C3 alkyl substituted thienyl and triphenylamine. After a ring-locking o-dinaphthol intermediate is synthesized from o-dinaphthol and 1,6-diiodohexane, a coupled product is synthesizedthrough a Suzuki coupling reaction, finally, an aldehyde group and malononitrile are subjected to a reaction, and the fluorescent materials are obtained. The fluorescent materials realize aggregation-induced emission characteristic and chirality in one molecular framework and can prevent quenching of circular dichroism spectrum, namely, the AACD effect, and by use of the two properties, microcrystals with different morphologies are obtained by self-assembly of the synthesized fluorescent materials, so that the compounds realize spectrum-adjustable circularly polarized light.

The invention discloses an LED lamp with the light color adjusting function. The LED lamp comprises a lamp holder, a lamp body and a handle, wherein three LED lamp sets are arranged in the lamp holder and each LED lamp set comprises a high color temperature LED string and a low color temperature LED string. An adjustable drive module, a light color adjusting module and a rechargeable battery are arranged in the handle, and the handle is connected with the lamp body via a multi-shift adjustable rotary knob. The light color adjusting module comprises two brightness adjusting rotary knobs and three dial switches which work together to control the lamp to emit lights with high color temperature, low color temperature and moderate color temperature between the high and low color temperatures, as a result, the adjustment of the color temperature, the spectrum and the brightness can be realized. According to LED lamp disclosed by the invention, the light control signal generation circuit has a simple structure, the linearity of the operation signal is good, the lamp is widely applicable for indoor purposes and outdoor occasions without external power sources and in need of extensive light adjustment of multiple lamps, and further, the modular structure of the lamp brings convenience in installation, maintenance and light emitting angle adjustment.

The invention discloses a nitride phosphor and a preparation method thereof. The chemical composition is: A1‑xMpQqN3:xR, and also discloses a preparation method of the nitride. The excitation spectrum of the phosphor of the present invention is broadband excitation, covering Near-ultraviolet and blue light match well with the emission spectrum of the LED chip. The phosphor emits red light, with high luminous efficiency, wide half-peak width, and stable chemical properties. The phosphor spectrum is adjustable. By changing the ratio of metal elements in A1‑xMpQqN3:xR, the emission peak wavelength can be moved from 610nm to 665nm. The phosphor powder can also be added with high-purity ultrafine silicon powder to remove the adsorbed oxygen contained in the silicon nitride, reduce the oxygen content of the phosphor powder of the present invention, and improve the luminescent performance of the phosphor powder.

An electroluminescent device whose wavelength can be modulated is characterized in that it includes a voltage modulation unit A1 composed of M1, I1, S1, and M2 and an electroluminescent device A2. The terminal voltage realizes the adjustment of the emission wavelength of the electroluminescent device A2. The present invention adjusts the reflection phase shift of the unit by adjusting the voltage across the voltage modulation unit A1, and the change of the reflection phase shift leads to the change of the emission wavelength of the electroluminescent device A2, thereby realizing the modulation of the emission wavelength of the light emitting device. The invention only needs to adjust the voltage at both ends of the modulator layer to realize the modulation of the emission spectrum of the light-emitting device, and achieve the purpose of modulating the emission wavelength of the light-emitting device under a fixed structure, and the structure is simple and the modulation speed is fast, which is beneficial to the integration of display devices and high speed optical modulator applications.

The invention discloses a light source structure for testing CIS products based on general ATE, including an LED light source box and a controller, an ATE interface board and a fixed structure; LEDs are installed in the LED light source box, and the controller is used to control the LED output to meet the test conditions. Light source; there are control chips and circuits in the controller to realize the function of controlling LEDs, and the ATE interface board is a PCB connecting ATE and chips; the light source structure based on general ATE testing CIS products provided by the present invention, a complete set of external equipment , the installation does not need to change the ATE structure. Even if there is a problem with the light source, it can be replaced in a short time without turning off the ATE. It saves time and cost, is easy to transform, and is suitable for mass production.

The invention discloses cerium-europium-terbium codoped nanocrystal fluorescent powder which has a chemical general formula of CexEunTb1-x-nF3 (x+n is greater than 0 and less than or equal to 1), wherein x represents a molar concentration of Ce3+, and n represents a molar concentration of Eu3+. A preparation method of the powder comprises the following steps: (1) weighing Ce(NO3)3.6H2O, Eu(NO3)3.6H2O and Tb(NO3)3.6H2O, adding [Bmim]NO3, stirring for 30-45min at 55-65 DEG C to prepare mixed liquid, (2) adding the mixed liquid into [Bmim]PF6, performing ultrasonic dispersion for 1-3h at 10-30Hz, and (3) cooling ultrasonic dispersion liquid to the room temperature, sucking liquid on a lower layer after liquid layering, washing with acetone, and then performing centrifugation and drying. The preparation method is simple, low in energy consumption and low in corrosion, and the prepared nanocrystal fluorescent powder has a good luminescent property.

The invention relates to a distributed optical fiber positioning system, in particular to an OTDR device and measurement method based on physical random code correlation detection, which solves the contradiction that the dynamic range and spatial resolution of the traditional OTDR system cannot be improved simultaneously. The device of the present invention includes a physical random code generator, a microwave amplifier, a DFB laser, an electro-optical phase modulator, an optical isolator, a first optical amplifier, a 1×2 fiber coupler, a variable optical delay line, a first photodetector, and an oscilloscope , an optical fiber to be tested, an optical circulator, a second optical amplifier, a second photodetector, and a computer. The system structure of the present invention is simple, easy to operate, low in cost, and the spatial resolution is determined by the code width of the physical random code, which not only avoids the problem of deterioration of the spatial resolution caused by the weak period of the chaotic laser signal, but also improves the accuracy of the high spatial resolution acquisition. Adjustment is also very convenient.

The invention relates to the field of design and synthesis of novel fluorescent powder and spectrum regulation and control, and in particular to self-activated fluorescent powder for achieving spectrum adjustability through cation substitution. The fluorescent powder is made of phosphate as a matrix, the chemical formula of the phosphate is Ca2-xAxBa3(PO4)2SiO4, and in the formula, A is one or twoelements of Sr and Mg; x is a mole doping amount of A<2+> ions which are adopted to dope and substitute crystal lattice sites of Ca<2+>. At a sintering temperature and under conditions of same otherenvironments, regulation and control on the emission spectrum of the self-activated fluorescent powder is achieved by adjusting the A<2+> ion doping amount. The fluorescent powder is synthesized through a conventional high-temperature solid-phase method, is simple in synthesis method, easy to operate and good in repeatability, and in addition, as self-activated fluorescent powder, the fluorescentpowder is free of rare-earth ions as activation ions, so that the preparation cost can be greatly reduced. The fluorescent powder provided by the invention can be effectively activated by ultravioletlight of 220-300nm.