66results about How to "Good interference effect" patented technology

This invention discloses one high reflection rate lens measurement method, which comprises the following steps: a, two same concaved high reflected concaved surface form direct chamber and to send continuous laser into stable resonance chamber or co focus chamber and when light chamber output signal range value is larger then set valve value, it closes laser beam to get direct chamber annealing time by index annealing signal matching to get chamber reflection rate; b, keeping chamber length unchanged and adding high reflection lens to form fold chamber between two blocks and when the output signal range value is larger than valve value, it closes laser beam to get fold chamber annealing time to compute test lens reflection rate.

The invention relates to double-grating displacement transducer. It includes displacement unit, displacement guiding unit, signal processing circuit, laser, double grating unit, and photo-electricity receiver. The double gratings unit is formed by movable and fixed ones. The displacement unit and displacement guiding unit form the rectilinear kinematic pair; laser emits laser beam into double grating unit to produce double grating interference; photo-electricity receiver is used to receive the interference fringe, transmit the electric signal into signal processing circuit. Compared with the single grating displacement transducer, the invention has better interference fringe and fringe voltage signal, suits for using higher subdivision to reach higher resolution. Only if the movable grating has good consistency in moving, it can realize good sized displacement range with 20mm, and 0.01um resolving ability.

An object of the present invention is to provide a novel double-stranded RNA that has high resistance to nuclease and cellular uptake efficiency and that can produce an excellent RNA interference effect. The present invention provides a double-stranded lipid-modified RNA comprising a sense strand having a nucleotide sequence complementary to a target sequence in a target gene, and an antisense strand having a nucleotide sequence complementary to the sense strand, the double-stranded RNA being capable of suppressing the expression of the target gene, and the sense strand having a double-stranded lipid bound directly or via a linker to at least one of the first to sixth nucleotides from the 5′ end.

The invention relates to a multipoint gas sensing system based on an optical fiber buffer, which comprises an address encoder, a double-wavelength light source, a multipoint optical fiber sensing network and a demodulator. The address encoder generates an address code and a read-write control signal of different monitoring points; each detecting unit of the multipoint optical fiber sensing network adopts a buffer structure introduced with a gas absorbing chamber in an optical fiber loop; a double-loop coupling all-optical buffer and a polarization type all-optical buffer can be adopted; under the control of a write signal, the optical signal of the address code is written into the optical fiber loop of the detecting unit and circularly absorbed by the gas many times; the absorbed optical signal is read out and sent to the demodulator for photoelectric conversion, comparison with the reference light, address decoding and data processing in order to gain the gas concentration in different points and realize the multipoint gas monitoring. The system gains the good effects through improving the structure of the absorbing chamber, adding an optical amplifier, a polarization control and a device with the wavelength of 1665nm, and is used in the monitoring of the gas which has the wavelength of 1665 nm and is near provided with an absorption peak.

The invention discloses a method for suppressing two-dimensional side lobes on horizontal planes for geosynchronous orbit circular SAR (synthetic aperture radar), and belongs to the field of synthetic aperture radar (SAR) signal processing. The method has the advantages that the method is based on characteristics of geosynchronous orbit circular SAR three-dimensional imaging target response functions, two-dimensional side lobe suppression filter functions can be obtained on the basis of confocal algorithms by the aid of total least squares iterative processes, and accordingly the two-dimensional high side lobes on the horizontal planes can be suppressed for the geosynchronous orbit circular SAR; the two-dimensional horizontal high side lobes can be effectively diminished (peak side lobe ratios can be reduced from the original -7.9 dB to -20 dB approximately, and integration side lobe ratios can be reduced from the original -4.79 dB to -20 dB approximately) for the geosynchronous orbit circular SAR by the aid of the method without loss of resolution, and accordingly the imaging and interference performance of the geosynchronous orbit circular SAR can be improved.

The invention discloses a versicolor interference color nacreous pigment and a preparation method thereof. The nacreous pigment has the following structure: a transparent or semitransparent slice is used as a substrate; a titanate absorption color coating, a transparent middle interlayer and a transparent titanium dioxide interference color coating are coated on the substrate in turn; the outer layer is coated with an outer protective layer; and the transparent middle interlayer is a silicon dioxide coating or an aluminum oxide coating. The interference color pigment is prepared by wet chemical coating technology; the pigment uses the transparent or semitransparent slice as the substrate; and after the titanate absorption color coating, the transparent middle interlayer and the transparent titanium dioxide interference color coating are coated on the substrate in turn, the interference color pigment is once formed by once calcination. The pigment has rich and bright color, has various versicolor effects from a reflected light visual angle to a deviated reflected light visual angle, and can be used in the fields of paint, ink, plastics, cosmetics formulation, decoration material, papermaking, glass and the like.

An object of the present invention is to provide a novel double-stranded RNA that has high nuclease resistance and high cellular uptake efficiency, and that is capable of producing an excellent RNA interference effect. The present invention provides a lipid-modified double-stranded RNA comprising a sense strand having a nucleotide sequence complementary to a target sequence, and an antisense strand having a nucleotide sequence complementary to the sense strand, the double-stranded RNA being capable of inhibiting the expression of the target gene, the sense strand having a lipid linked to at least one of the first to sixth nucleotides from the 5′ end side directly or via a linker.

The invention discloses an emergency operation method for a composite wing unmanned aerial vehicle used for controlling landing of the composite wing unmanned aerial vehicle. The emergency operation method comprises the steps that: when the composite wing unmanned aerial vehicle needs to land, a distance of the composite wing unmanned aerial vehicle and a ground controller is judged, when the distance exceeds a remote control distance, the composite wing unmanned aerial vehicle finishes automatic landing by using an autopilot on the composite wing unmanned aerial vehicle; when the distance is within the remote control distance, the ground controller sends a control mode instruction to the composite wing unmanned aerial vehicle, and the control mode instruction is any one of automatic emergency control and hand-operated emergency control. The automatic emergency control is that the composite wing unmanned aerial vehicle finishes the automatic landing by using the autopilot on the composite wing unmanned aerial vehicle, and the hand-operated emergency control is that the composite wing unmanned aerial vehicle finishes hand-operated landing by using the landing control instruction sent by the ground controller. The composite wing unmanned aerial vehicle can effectively improve the success rate of the composite wing unmanned aerial vehicle forced landing.

A human anti-HBsAg mono-chain antibody / human antibody light chain constant region / protamine truncate recombinant gene, encoding protein and use are disclosed. The protein has antigen and nucleic acid combined activities. The process is carried out by: combining HBV siRNA with siRNA expression plasmid, transferring to HBV infectious cell specifically, and inhibiting HBV gene expression and copy. It has excellent specificity, efficiency, continuity and safety.

The invention provides a quantum clustering system and method for law texts. The quantum clustering system comprises a law document input system, a law text quantum clustering mining system, a database and a law document output system; and related law texts are input by the law document input system, preprocessed and cleaned by the law text quantum clustering mining system and then stored in the database. The law text quantum clustering mining system conducts clustering analysis on the law texts completing preliminary processing and cleaning, wherein the processed law texts or records are described by using quantum state functions, all the texts and records are grouped, the similar texts and records are gathered into one cluster, a large number of texts can be quickly processed by means ofthe superimposition characteristic, the coherence characteristic and the entanglement characteristic of the quantum state functions, text clustering in any shapes and abnormal phenomena and behaviorsof the texts are discovered, and a quantum clustering mining result is output graphically for a decision-making reference of a user.

A process for preparing the FeTi-series pigments whose color is changeable with the visual angle includes such steps as providing mica titanium with different interference colors, pretreating, regulating pH value, depositing an iron hydroxide layer on its surface, and calcining to convert iron hydroxide to alpha-Fe2O3.

The invention provides an anti-counterfeiting film. Anti-counterfeiting pattern layers of the anti-counterfeiting film comprise hollowed out refractive material parts; each hollowed out refractive material part comprises at least one film stack with a film structure of |(alpha<1> H beta<1> L alpha<2> H beta<2> L...alpha<m> H beta<m> L)|, wherein H is used for representing a high refractive index layer, L is used for representing a low refractive index, n and m are positive integers, 3<n<=150, 3<m<=50, m<=n, in a same film stack, alpha<1>, alpha<2>, ..., alpha<m> and beta<m>, ..., beta <2>, andbeta <1> are capable of satisfying a same grading change rule of a same cosine wave or sinusoidal wave pattern independently, according to the i th high and low refractive index units alpha H beta L, alpha is used for representing the optical thickness of the i th high refractive index material layer accounts for alpha times of lambda / 4; and beta is used for representing the optical thickness of the i th low refractive index material layer accounts for beta times of lambda / 4, lambda is used for representing monitoring wavelength, and the reflection wavelength of the anti-counterfeiting film ranges from 380 to 700nm. Low cost counterfeiting is achieved.

The invention discloses a device for visually monitoring cryogenic fluid based on laser interferometry. The device comprises a vacuum box and a test tube which is arranged in the vacuum box, wherein the test tube is provided with two inner light window panes; the vacuum box is provided with two outer light window panes; the device also comprises an optical measurement system; the optical measurement system comprises a laser emitter, a beam expander, a collimating lens, a light splitter, a first reflecting mirror, a second reflecting mirror, a screen and a camera. The device can be used for obtaining concentration distribution of the cryogenic fluid surface through the laser interferometry and accurately and visually monitoring behavioral characteristics of the cryogenic fluid; by arranging the four light window panes, the light can transmit the cryogenic fluid; by arranging the second reflecting mirror, the light can transmit in the cryogenic fluid for two times, so that the interference effect can be enhanced; the optical measurement system of the device is arranged outside the vacuum box; the vacuum box is small in size and is capable of adjusting all the parts of the optical measurement system at any time during testing, so that the experiment is relatively convenient to operate.

The invention discloses a large-numerical-aperture laser lens imaging inspection system. A single-mode monochromatic light source and an optical fiber collimating mirror form a parallel light system,a to-be-measured laser lens is slidably installed between the optical fiber collimating mirror and a standard objective lens along the optical axis and is used for focusing incident parallel light beams into a focus light spot, and the position of the focus light spot coincides with the focus of the standard objective lens. The standard objective lens and a standard tube lens form a conjugate imaging system, and the conjugate imaging system is used for amplifying the focus light spot into a focused light beam image and projecting the focused light beam image to an area array CCD element, the position of the area array CCD element coincides with the focus of the standard tube lens, the amplification factor of the conjugate imaging system is 10X-100X, and the numerical aperture NA of the to-be-measured laser lens is smaller than or equal to the numerical aperture NA of the standard objective lens. The system has the advantages of being flexible in operation, high in visibility and easy in judgment and standardization, the quality and efficiency of laser optical lens design and optical inspection are improved, and higher production efficiency and more normative inspection quality control are achieved for laser lens production.

The invention discloses a Fizeau interference-based ultra-weak grating perimeter security and protection system. The system comprises a detection optical cable, a query unit and a control unit; the detection optical cable is an optical fiber-armored micro-vibration optical cable which is provided with a large number of ultra-weak broad-spectrum gratings; the query unit is connected with the detection optical cable and is used for generating and splitting the reflection signals of target gratings in an array; and the control unit is connected with the query unit and is used for generating pulse control signals, synchronously carrying out phase demodulation, judging an intrusion behavior through signal processing and pattern recognition, and positioning the intrusion behavior. According to the Fizeau interference-based ultra-weak grating perimeter security and protection system of the invention, a characteristic that ultra-weak grating pairs can generate Fizeau interference is utilized, a long-distance optical fiber perimeter is divided into a plurality of micro protection regions, whether intrusion behaviors exist in the protection regions is judged through detecting Michelson interference phenomena of the reflection light of the grating pairs in the micro protection regions, a quick protection region scanning query method is used in combination, and therefore, all-optical fiber distributed sensing can be realized. With the Fizeau interference-based ultra-weak grating perimeter security and protection system adopted, problems such as low sensitivity, short sensing distance, poor positioning performance and false alarm of a traditional distributed perimeter security and protection system can be solved. The Fizeau interference-based ultra-weak grating perimeter security and protection system has a bright application prospect in the perimeter security and protection field.

A flash memory device includes an isolation layer formed on an isolation region of a semiconductor substrate, a tunnel insulating layer formed on an active region of the semiconductor substrate, a first conductive layer formed over the tunnel insulating layer, a dielectric layer formed on the first conductive layer and the isolation layer, the dielectric layer having a groove for exposing the isolation layer, a trench formed on the isolation layer and exposed through the groove, and a second conductive layer formed over the dielectric layer the trench.

The invention belongs to the technical field of short-pulse laser and particularly relates to a laser capable of directly generating two paths of coherent light. An existing multi-beam laser photoetching device has the defects of excessive devices, low light energy utilization rate, non-uniform interference fringe light intensity distribution and the like. The invention provides the laser capableof directly generating two paths of coherent light. The laser comprises a first laser oscillation assembly, an electro-optic Q-switching assembly and a second laser oscillation assembly which are arranged in sequence, the first laser oscillation assembly comprises a first Dammann transmission grating, a first laser crystal excitation component and a first Dammann reflection grating which are arranged in sequence; the second laser oscillation assembly comprises a second Dammann reflection grating, a second laser crystal excitation component and a second Dammann transmission grating; the first laser crystal excitation component comprises a first pump light source and a first laser crystal, and the second laser crystal excitation component comprises a second pump light source and a second laser crystal. The double-path light interference effect is good, the working efficiency is high, and the reliability is high.

The invention provides a narrowband reflective film. The narrowband reflective film comprises a transparent substrate layer and a reflective film system. The reflective film system comprises n high-low refractive index material units. The reflective film system comprises at least one film stack having a film structure of |([alpha]1H[beta]1L[alpha]2H[beta]2L...[alpha]mH[beta]mL)|, wherein n and m are positive integers, and 3<n<=150, 3<m<=50, m<=n. The [alpha]1, [alpha]2, ..., [alpha]m and [beta]m, ..., [beta]2, [beta]1 in the same film stack each independently satisfies the same gradient law onthe same cosine waveform or sinusoidal waveform. In [alpha]iH[beta]iL, [alpha]i represents the optical thickness of the ith high refractive index material layer as a multiple of [lambda] / 4, [beta]i represents the optical thickness of the ith low refractive index material layer as a multiple of [lambda] / 4, |[alpha]1-[beta]m|, |[alpha]2-[beta]m-1|, |[alpha]3-[beta]m-2|, ..., |[alpha]m-[beta]1| areeach independently between 0.01 and 0.2.

The invention provides an infrared broadband cut-off filter, an optical filter and a camera. The filter comprises a transparent base material layer, a near-infrared reflecting film and a light absorber, the near-infrared reflecting film is arranged on one surface of a transparent base material layer or distributed on two opposite surfaces of the transparent base material layer; the device is usedfor cutting off light with a wavelength range of 700-1300nm. The near-infrared reflecting film comprises a plurality of cut-off units; the cut-off units form m membrane stacks; assuming that the membrane system structure of the membrane stack A theta is | V theta (alpha1H beta1L alpha2H beta2L-Alpha nH betanL) |, wherein n and m are positive integers, n is larger than 3 and smaller than or equal to 80, and alpha 1, alpha 2-alpha n and beta 1, beta 2-beta n in the same membrane stack independently meet the same gradient rule on the same cosine or sine waveform; 1 < = m < = 10; and [alpha] i and[beta] i are each independently in the range of 0.2 to 1.5. The cut-off width of the infrared cut-off filter is large.

The invention discloses an MEMS micromirror, and the MEMS micromirror comprises a substrate and a mirror surface structure, wherein the mirror surface is located on one side of the substrate, a gap is formed between the first surface of the mirror surface and the first surface of the substrate, incident light rays emitted by a light source irradiate on the second surface of the substrate, and the incident light rays irradiate on the second surface of the substrate. The first part of incident light is reflected by the second surface of the substrate to form first reflected light, the second part of incident light is reflected by the first surface of the mirror surface structure to form second reflected light, and the first reflected light and the second reflected light are coupled to form first interference light. According to the interference system, based on the characteristics of MEMS chip surface reflection and substrate surface reflection, an interference light path is formed by coupling light reflected by a non-moving substrate and light reflected by a moving mirror surface structure in an MEMS micromirror, the interference requirement of a Michelson system is met, the arrangement of a fixed mirror is reduced, the optical path assembly efficiency of the interference system is effectively improved, and the cost of the optical structure is greatly reduced.

The invention provides a narrowband reflective film, which comprises a transparent substrate layer and a reflective film system. The reflective film system comprises n high / low refractive index material units and at least one film stack having a film system structure of |(alpha1H[beta]1L[alpha]2H[beta]2L...[alpha]mH[beta]mL)|, wherein, the H represents a high refractive index material layer, L represents a low refractive index material layer, and n and m are positive integers, wherein the 3<n<=150, 3<m<=50, m<=n. Alpha1, alpha2,..., and [alpha]m, and [beta]m,..., beta2, and beta1 of the same film stack independently satisfy the same gradient law on the same cosine waveform or sinusoidal waveform. For the i-th high / low refractive index material unit [alpha]iH[beta]iL, 1<=i<=n, [alpha]i represents the optical thickness of the i-th high refractive index material layer as a multiple of lambda / 4, and [beta]i represents the optical thickness of the i-th low refractive index material layer asa multiple of lambda / 4. The reflective film system or the transparent substrate layer is further provided with a light absorbing agent.

The present invention discloses a simplified Sagnac interference element based on reflective blazed gratings. The simplified Sagnac interference element based on the reflective blazed grating is characterized by comprising a polarizing beam splitter, the reflective blazed gratings, a polaroid, an imaging optical system and an interference pattern reception surface, wherein the parallel incident light beams are divided into P light and S light via the polarizing beam splitter; the P light goes ahead along a direction reverse with the incident light beams after being reflected by a first reflective blazed grating and a second reflective blazed grating orderly, is reflected by the polarizing beam splitter and then is orderly projected by the polaroid and the imaging optical system to the interference pattern reception surface; the S light is reflected by the second reflective blazed grating and the first reflective blazed grating, then is transmitted through the polarizing beam splitter, the polaroid and the imaging optical system along a direction vertical with the incident light beams and then is projected to the interference pattern reception surface; and the interference element obtains the interference patterns on the interference pattern reception surface aiming at the parallel incident light beams. According to the present invention, the requirements of a white light polarized interferometer can be satisfied.

The invention relates to a high-molecular polymer for treating tumors and a preparation method and application thereof, and belongs to the technical field of medicines. The preparation method comprises the following steps: synthesizing PEGMA-(RAFT); synthesizing PEGMA-b-PDPA-(RAFT); synthesizing PEGMA-b-PDPA-b-PDMAEMA-(RAFT); desulfurization reaction; and synthesizing the high-molecular polymer ma< 1 >-PMDM. The invention also discloses the high-molecular polymer prepared by the preparation method and used for treating tumors and application of the high-molecular polymer. According to the preparation method, the high-molecular polymer for treating tumors can be prepared very efficiently; the high-molecular polymer can improve the stability of the carrier, improve the cellular uptake capacity and improve the transfection capacity, the composition and the structure of the carrier have the capacity of overcoming the lysosome biological barrier, and the high-molecular polymer can be applied to a targeting drug carrier for treating tumors.

The invention provides a heterodyne interference measuring system convenient in splitting ratio adjustment. The heterodyne interference measuring system comprises a laser, a polarization splitting prism and a photoelectric detector. An acousto-optic frequency shifter is arranged in front of the laser. Zero-order light generated by the acousto-optic frequency shifter is used as measuring light, and first-order diffraction light is used as reference light. The measuring light is irradiated to a measured object successively through the polarization splitting prism and a quarter-wave plate. The reflected measuring light is transmitted through the quarter-wave plate and then is irradiated to a convex lens after being reflected by the polarization splitting prism. The reference light is irradiated to a convex lens successively through the reflection of a reflector, and a half-wave plate. According to the invention, the zero-order light and the first-order diffraction light generated by the acousto-optic frequency shifter are respectively used as the measuring light and the reference light, a beam splitting device is not needed, the splitting ratio can be conveniently changed by the adjustment of a acousto-optic frequency shifter driving circuit, the intensity of the reference light is enabled to be close to the intensity of the measuring light, a relatively good interference effect is obtained, the measuring precision is improved, the adopted optical member are fewer, and the beneficial effect is substantial.