270 results about "Optical rotation" patented technology

Disclosed in the present application are a terahertz refractive index-optical rotation common-optical-path joint measurement method and system based on a quantum weak value amplification effect, and an application of the system. The method comprises: performing pre-selection, wherein a polarization state α of an incident terahertz wave emitted by a terahertz time-domain spectral unit is used as a pre-selected quantum state, the polarization state α being selected by means of a first polarizer; performing post-selection, wherein a polarization state α+π2 selected by means of a second polarizer is used as a post-selected quantum state; before measurement, making the post-selected quantum state and the pre-selected quantum state orthogonal to each other; and performing two instances of common-optical-path joint weak coupling, wherein two instances of weak coupling are sequentially performed on the terahertz wave and a sample to be subjected to measurement that is on a common-optical-path joint measurement unit. In the present application, the high-sensitivity characteristic of quantum weak measurement in which a signal is amplified but technical noise is not amplified is used, and by means of common-optical-path joint measurement, the refractive index and optical rotation of a measured chiral drug can be jointly measured with high sensitivity, without the need to change an optical path, thereby realizing high-sensitivity conformation recognition of the chiral drug.

The invention discloses a laser frequency stabilization system based on Faraday anomalous dispersion atomic filtering, which is used for carrying out frequency stabilization on phase modulation multi-sideband laser, and comprises a frequency doubling laser unit which is configured to comprise a fundamental frequency seed light source, an electro-optical modulator, a fundamental frequency amplifier and a frequency doubling crystal; the light splitting module unit is configured to split the frequency doubling light into a main output light path and a monitoring light path; the atomic optical rotation filter is located on the monitoring light path and is configured to maintain the purity of the frequency-stabilized laser spectrum through purification treatment under the control of the axial magnetic field and the temperature; the frequency stabilization unit is configured to be a frequency stabilization light path and a servo system, and the frequency stabilization light path is used for obtaining laser frequency information and generating an error signal; the servo system is used for controlling the frequency of the fundamental frequency seed light source according to the error signal feedback. According to the laser frequency stabilization system provided by the invention, the spectrum purification and frequency stabilization precision can be improved, so that high-frequency stability locking is realized.

The invention discloses a magnetic induction intensity detection device based on laser self-mixing interference, which is characterized in that laser emitted by a laser is divided into two light paths after being split by an optical splitter; wherein a polarizing film, a magneto-optical crystal and a transducer are sequentially arranged on one optical path; the transducer is electrically connected with the control module, and the control module generates a continuous sine wave signal to continuously control the transducer; a detector is arranged on the other light path; the detector is electrically connected with the Fourier transform module, and the Fourier transform module analyzes a laser self-mixing interference signal acquired by the detector; the magneto-optical crystal is located in the magnetic field; laser emitted by the laser device is reflected for multiple times between the laser device and the transducer, and laser self-mixing interference is formed under the action of the polaroid. The laser is reflected for multiple times between the laser and the transducer, the Faraday optical rotation effect can be enhanced, the polaroid serves as the polarizer and the polarization analyzer, and the advantages that an external polarization analyzer is not needed, the measurement cost is reduced, and the sensitivity is improved are achieved.

According to the SERF magnetic field measuring device closed-loop magnetic compensation method based on double-beam detection, Y-axis direction detection light used for decoupling is added on the basis of X-axis direction detection light, decoupling of three-axis magnetic field signals can be achieved, independent measurement and closed-loop control real-time magnetic compensation of a three-axis magnetic field are achieved, support is provided for further improving compensation precision, and the method is suitable for large-scale popularization and application. Comprising the steps that Y-axis direction detection light penetrating through an alkali metal gas chamber in the Y-axis direction, X-axis direction detection light penetrating through the alkali metal gas chamber in the X-axis direction and pumping light penetrating through the alkali metal gas chamber in the Z-axis direction are arranged in the SERF magnetic field measuring device, the X-axis direction detection light is used for detecting the optical rotation angle, and the Y-axis direction detection light is used for three-axis magnetic field decoupling; the pumping light is used for polarizing atoms in the alkali metal gas chamber; adding a Y-axis calibration signal; controlling the Z-axis coil current to compensate the Z-axis magnetic field according to the Py; controlling the X-axis coil current to compensate the X-axis magnetic field according to the Py; and controlling the Y-axis coil current to compensate the Y-axis magnetic field according to the Px.

The invention discloses an atom magnetometer device and method based on detection light frequency detuning amount modulation. Red and blue detuning linear polarization modulation light is used as detection light to realize modulation of an optical rotation angle of an atom magnetometer. Under the condition that the optical power of the modulated light is kept unchanged, the frequency of the modulated light is subjected to red detuning and blue detuning conversion with the same detuning amount relative to the resonance frequency of the alkali metal atom D1 line, so that the rotation angle is quickly switched between positive deflection and negative deflection, the modulation of the rotation angle is realized, and the modulation efficiency is improved. And the modulated optical rotation angle signal is subjected to polarization differential detection and phase-locked amplification technologies to obtain a magnetometer output signal containing to-be-detected magnetic field information. Compared with a conventional atom magnetometer modulation method, the method has the advantages that the modulation of the optical rotation angle is indirectly realized by carrying out red and blue detuning modulation on the detection light, the introduction of a modulation magnetic field is avoided, the optical power noise is suppressed, the low-frequency noise is isolated, and compared with an unmodulated mode, the amplitude of the optical rotation angle is enhanced, and the sensitivity of the magnetometer is improved.

The utility model relates to the technical field of optics, is used for solving the problem that display of a display screen is in a gray white shape when the screen is turned off, and provides a display screen which comprises a display layer, a touch layer / cover plate layer and an optical rotation integrated black composite film arranged between the display layer and the touch layer / cover plate layer and used for the display screen. The optical rotation integrated black composite film for the display screen comprises a quarter-wave plate layer, a polaroid layer and an adhesive layer which are sequentially arranged in a stacked mode, the quarter-wave plate layer is arranged on the light emitting side of a display layer in an attached mode, and the adhesive layer is arranged on the inner surface side of a touch layer / cover plate layer in an attached mode; ambient light is converted into first linear polarized light through the polaroid layer during incidence; the polarized light is converted into left-hand circularly polarized light or right-hand circularly polarized light through the quarter-wave plate layer; when the ambient light is emitted, the ambient light is reflected and converted into reverse right-handed circularly polarized light or left-handed circularly polarized light through the display layer; the second linear polarized light is converted into second linear polarized light through the quarter-wave plate layer and is blocked by the polaroid layer, so that the display screen displays integrated black after the screen is turned off.

The invention discloses a lens mount and an endoscope, and relates to the technical field of endoscopes. The lens mount comprises a mount body, a light source, a polarizer and a polarization adjusting assembly. The polarization adjusting assembly with the optical rotation liquid is arranged on the far end face of the seat body, the length of the optical rotation liquid on the light emitting path of the light source is adjustable, the polarization adjusting assembly is arranged on the light emitting path of the light source, and light emitted by the light source forms polarized light after passing through the polarizer. After the polarized light passes through the polarization adjusting assembly, the polarization angle of the polarized light can be changed according to the length of the optical rotation liquid in the polarization adjusting assembly on the light emitting path of the light source, and the problem that in the prior art, light in a soft lens cannot pass through a polarizer at a specified angle, and then it cannot be guaranteed that the light has a specified polarization state is solved. When the lens mount provided by the embodiment of the invention is applied to the endoscope, the technical problem can also be solved.

The invention discloses an application method and system of non-reciprocity polarized light analysis in weak magnetic field measurement, and mainly relates to the technical field of weak magnetic field measurement. Comprising the following steps: establishing a propagation model of an optical path in a magneto-optical medium based on nonreciprocity of a Faraday magnetic rotation effect; based on the Faraday magneto-optical effect, parallel components of the magnetic field are calculated through the rotation angle in the uniform magnetic field; measuring the spatial distribution of the non-uniform magnetic field by adopting an approximation method; analyzing and judging the polarization property of the light path to obtain elliptically polarized light; and calculating the rotation angle in the elliptically polarized light based on the Malus law. The beneficial effects of the invention are that the method achieves the improvement of the measurement precision, has a wider linear interval, and solves the limitation of directivity.

The invention discloses an elliptically polarized light atom magnetometer device and method for eliminating optical frequency shift, and the device employs a laser and an integrated device to generate elliptically polarized modulated light with symmetrical and detuned frequency as a laser source of a single-beam atom magnetometer, and achieves the measurement of a to-be-measured weak magnetic field under a modulated magnetic field. According to the invention, two beams of pulse modulation light whose detuning amounts are symmetrical about the center frequency of alkali metal atoms and the phase difference is pi are combined into one beam, and the beam is converted into modulated elliptically polarized light through a polarization device to pump and detect the alkali metal atoms, so that a virtual magnetic field generated by optical frequency shift in the coherence period of the alkali metal atoms can be eliminated through multiple times of rapid inversion; modulation of elliptically polarized light frequency is converted into modulation of an optical rotation angle through interaction of alkali metal atoms and light, and finally, an output signal containing information of a weak magnetic field to be measured is extracted from an optical rotation angle signal by using polarization difference detection and difference frequency demodulation technologies, so that an optical frequency shift error can be eliminated; and meanwhile, low-frequency noise caused by pumping light frequency fluctuation is suppressed, and the device has the characteristic of high integration and the advantage of miniaturization.

The invention discloses a three-port reflection-type circulator and a preparation method thereof, the three-port reflection-type circulator comprises a three-fiber tail fiber, an annular core and a plurality of glass tubes, the tail fiber end face of the three-fiber tail fiber is subjected to thermal core expansion treatment, the annular core comprises a polarization beam splitting assembly, an optical rotation assembly and a refraction assembly, the polarization beam splitting assembly comprises a displacement crystal, and the displacement crystal is connected with the optical rotation assembly. The optical rotation assembly comprises a half-wave plate group, an optical rotation unit, a half-wave plate and a compensation plate, the refraction assembly comprises a collimating lens, a Wollaston prism and a reflective mirror, and the three-fiber tail fiber and the annular core are sleeved through a plurality of glass tubes; wherein light emitted by the three-fiber tail fiber sequentially passes through the polarization beam splitting assembly, the optical rotation assembly and the refraction assembly, is reflected by the reflective mirror, sequentially passes through the refraction assembly, the optical rotation assembly and the polarization beam splitting assembly and returns to the three-fiber tail fiber. The three-port reflective circulator in the embodiment of the invention is more compact in structure and smaller in size, and can be widely applied to the technical field of optical devices.

A Faraday magneto-optical effect based optical computing method and system for relay protection, relating to the technical field of relay protection of power systems. The present invention aims to solve the problem that the current amplitudes and phases of lines on two sides of a protected object are not equal due to a transformer ratio and a connection group when optical differential protection is introduced into the field of transformer protection. In the present invention, a cascade optical computing solution is used; three optical current transformers are connected in series on one optical path, and a final output optical signal is formed by means of cascaded multiplication of outputs of the three optical current transformers and carries an angle of optical rotation containing differential current information; and a filter circuit is used to detect a carrier signal and a modulation wave signal of the optical signal outputted by the third optical current transformer, then a modulation ratio is calculated, and finally, a differential current is calculated.

A narrow-pulse-width multi-wavelength laser based on LED pumping comprises a reflecting mirror, a first LED pumping module, an optical rotation crystal, a second LED pumping module, an acousto-optic Q-switched crystal and an output mirror which are sequentially connected in series. The LED pumping module comprises a laser rod located in the center, a glass sleeve is arranged on the periphery of the laser rod in the length direction, a supporting frame is arranged on the periphery of the glass sleeve, a plurality of sets of water-cooling copper blocks are evenly arranged on the supporting frame, and an LED stacking array is arranged on the side, close to the glass sleeve, of each set of water-cooling copper blocks. Each LED stacking array comprises an LED light bar and a PCB (Printed Circuit Board) for fixing the LED light bar, and the PCB is connected with the water-cooling copper block; cooling water circulation modules are arranged at the two ends of the laser rod in the length direction respectively, and water through holes are formed in the cooling water circulation modules and the water cooling copper blocks respectively. A laser resonant cavity system of the laser takes an LED as a pumping source, combines an acousto-optic Q-switching technology, and simultaneously realizes compression of laser pulse width and multi-wavelength output.

The invention provides a preparation method and device of Bi2O3-B2O3 inverse magnetic rotation glass, and the preparation method comprises the following steps: (1) placing a glass raw material in a closed heating furnace, introducing ultra-dry oxygen, and simultaneously exhausting outwards to enable the pressure in the furnace body to be P1 which is more than or equal to 1kPa and less than or equal to 5kPa; (2) heating to melt the glass raw material in the furnace body into molten glass, raising the temperature to a clarification temperature, introducing the mixed gas into the molten glass by a bubbling method, simultaneously homogenizing and stirring, and stopping introducing the mixed gas and starting defoaming and stirring when the homogenizing and stirring time reaches t1; wherein the mixed gas comprises ultra-dry oxygen and boron trichloride, the volume ratio of the ultra-dry oxygen to the boron trichloride is k, and k is (1-5): 1; (3) cooling, forming, annealing and pouring; in the step (2) and the step (3), the pressure in the furnace body is kept P1. The Bi2O3-B2O3 diamagnetic optical rotation glass prepared by the method disclosed by the invention is stable in magneto-optical performance and low in hydroxyl absorption coefficient in a middle-infrared band.

The LED screen comprises an LED screen body and an optical rotation integrated black composite film which is attached to the outer surface of the LED screen body and used for the LED screen, the optical rotation integrated black composite film used for the LED screen comprises an adhesive layer, a quarter-wave plate layer and a polaroid layer which are sequentially arranged in a stacked mode, and the adhesive layer is attached to the light emitting side of the LED screen body; the polaroid layer is used for converting ambient light into first linear polarized light when the ambient light is incident; the quarter-wave plate layer is used for converting the first linear polarized light into left-handed circularly polarized light or right-handed circularly polarized light when ambient light is incident; the left-hand circularly polarized light or the right-hand circularly polarized light is converted into reverse right-hand circularly polarized light or left-hand circularly polarized light when being reflected by the LED screen body; the reverse right-handed circularly polarized light or left-handed circularly polarized light is converted into second linear polarized light by the quarter-wave plate layer when being emitted, and the second linear polarized light rotates by 90 degrees relative to the first linear polarized light and is blocked by the polaroid, so that the LED screen displays integrated black after being turned off.

Optical calculation method and system for relay protection based on Faraday magneto-optical rotation effect are provided. A cascaded optical computing approach is employed, where three optical current transformers are connected in series on a single optical path. Final output optical signal represented as a cascaded multiplication of outputs of three optical current transformers, carries a Faraday rotation angle containing differential current information. Differential current required for protection is computed by modulation ratio which is calculated by use of a carrier and modulation wave signals of the output optical signal detecting by filtering circuit from the third optical current transformer.

The invention relates to a quasi-differential wavefront segmentation double-beam interference device with a planar light path structural design, which has the structural characteristic of a non-closed optical path for transmitting a measurement light beam in a one-way manner. Space coherent light of a transverse mode vector filtering mechanism based on the Huygens principle / phased array principle instead of homologous transmission time coherent light is used as each light source, and a non-closed optical path is realized under the cooperation of a one-way transmission mode on a divided measuring light beam. The problem that the sum of the loop wavelength increment or the frequency increment of a closed path interference device is zero is solved, so that the purpose of measuring the first-level effect of anisotropic physical parameters of a measured object in a linear system is achieved, and the device is particularly suitable for immersion type online measurement. The optical elements have stable performance and sound self-adaptive mechanism and self-diagnosis capability through careful layout of the optical elements; and the method also has wide application prospects in basic physical research and novel navigation / positioning systems. The invention also provides a differential wavefront segmentation and semi-transparent and semi-reflective mirror beam combination interferometer device based on the planar light path structure design, and a wavefront segmentation interferometer device based on the planar light path structure design and provided with a pre-crossing area and a bending type one-way-two-way-common mode combination light path structure. The invention relates to a wavefront segmentation interferometer device of a one-way-two-way combined light path structure which is designed based on a planar light path structure and adopts polarization light splitting-beam combination, optical rotation processing of a reference light beam and original path returning, and a use method of an interference device.

An optical substrate and a display device are disclosed, relating to the field of display technology. The optical substrate includes multiple optical rotation regions and a first light-shielding region. The first light-shielding region is located between at least two adjacent optical rotation regions. The two adjacent optical rotation regions include a first optical rotation region and a second optical rotation region. The first optical rotation region is used to convert linearly polarized light with a predetermined polarization state in incident light into left-handed polarized light, and the second optical rotation region is used to convert linearly polarized light with a predetermined polarization state in incident light into right-handed polarized light. The optical substrate includes a substrate, and multiple touch electrodes and multiple touch traces disposed on one side of the substrate. The multiple touch electrodes are separated from each other and are not connected. Each touch electrode is connected to a touch trace in a one-to-one correspondence. The touch electrodes are used to detect the touch position of a touch object on the optical substrate. Furthermore, in the orthographic projection onto the substrate, the touch electrodes overlap with the optical rotation regions, and the touch traces are located within the range of the first light-shielding region.

The application provides a double-end optical lightning stroke positioning method and system applied to power overhead optical cables, and relates to the technical field of optical fiber sensing; the basic principle of positioning is to realize single-end lightning stroke positioning based on the obvious change of the polarization state of optical signals after the optical signals encounter lightning strokes; the application first uses counter-transmitted pulse polarized light to detect a single-end lightning stroke positioning point, then establishes a double-end positioning equation set to solve an actual lightning stroke positioning point, so that accurate lightning stroke positioning is realized; the application uses the Faraday optical rotation effect of lightning strokes on optical signals to realize lightning stroke positioning based on a polarized light time domain reflectometer; compared with traditional lightning stroke positioning, the application has low operation and maintenance cost, high precision, does not need wide-area accurate time synchronization, has a simple system, is convenient to install, and reduces the blind area of lightning stroke positioning.

The invention discloses a method for in-situ measurement and regulation of wafer warping change in a liquid phase epitaxy process, and the method comprises the steps: starting a wafer warping in-situ measurement unit at a stage of liquid phase epitaxy growth of a rare earth iron garnet single crystal film, and measuring the warping degree of a wafer in a furnace body in real time; dynamically adjusting the rotation speed of the wafer according to the position change of the light spot on the wafer warping in-situ measurement unit until the growth is finished; the dynamic adjustment comprises a high-speed stage change and a low-speed stage change. According to the technical scheme, in-situ monitoring of the crystal growth process is achieved, the warping condition of crystal growth can be adjusted by adjusting the rotating speed, and fluctuation of the wafer cutting yield caused by the difference between a substrate and equipment is effectively improved. According to the warping change of the wafer, the rotation speed is continuously adjusted in the growth process, so that the warping is controlled within a certain range, the problem of wafer cracking is reduced, the product yield is improved, and the growth of a large-size Faraday optical rotation sheet wafer is facilitated.

The invention relates to the technical field of optics, and discloses a displacement adjusting method of a magneto-optical crystal, so as to meet the requirement that a user can conveniently, reliably, flexibly and manually switch among multiple wavelengths or multiple optical rotation angles. The method comprises the following steps: determining the magnetic flux density distribution of the magneto-optical crystal along the optical axis displacement in a target equipment magnetic cylinder to which the magneto-optical crystal belongs; determining the transmission relation of the adjusting ring of the target equipment in the process of circumferentially rotating around the optical axis to drive the magneto-optical crystal to move along the optical axis; calculating Vierdean constants respectively corresponding to the series of target wavelengths at the expected working temperature of the target equipment; according to the magnetic flux density distribution, the Viert constant and the length of the magneto-optical crystal, a series of positions where the magneto-optical crystal generates the same target optical rotation angle for polarized beams corresponding to different target wavelengths in the displacement process of the target magnetic cylinder are calibrated; and in the assembling process, the reference position is determined firstly, and then the corresponding scribed line on the adjusting ring is aligned with the reference line on the shell.

The application provides a polarization-dependent reflective two-stage optical ring, which comprises a first collimator, a first beam splitting cube, a first optical rotation component, a second beam splitting cube, a third beam splitting cube of a second optical rotation component and a second collimator arranged along a first optical path, and three beam splitting cubes are respectively light splitting dielectric films; the application combines the characteristics of a transmission two-stage ring and a reflective ring, two optical rotation components are arranged on the first optical path from the first collimator to the second collimator, thereby realizing the series connection of two isolation systems, playing a double-stage isolation effect, meanwhile, the application realizes the optical path folding of a second optical path from the second collimator to the third collimator by using a reflective component, and optical components are multiplexed in one of the optical rotation components, thereby also achieving a double-stage isolation effect; while realizing the double-stage isolation effect, the application also reduces the product volume, is beneficial to the integration of equipment and is also beneficial to cost reduction.

The present invention discloses a magnetic induction intensity detection device based on laser self-mixing interference. The laser light emitted by the laser is split by a spectrometer and then divided into two optical paths. A polarizer, a magneto-optical crystal, and a transducer are sequentially arranged on one optical path. The transducer is electrically connected to a control module, which generates a continuous sinusoidal wave signal to continuously control the transducer. A detector is arranged on the other optical path. The detector is electrically connected to a Fourier transform module, which analyzes the laser self-mixing interference signal obtained by the detector. The magneto-optical crystal is located inside a magnetic field. The laser light emitted by the laser is reflected multiple times between the laser and the transducer, and under the action of the polarizer, laser self-mixing interference is formed. In the present invention, the laser light is reflected multiple times between the laser and the transducer, which can enhance the Faraday rotation effect. In addition, the polarizer is used as a polarizer and an analyzer, which has the advantages of not requiring an external analyzer, reducing measurement costs, and improving sensitivity.

The utility model relates to a magneto-optical isolator and laser equipment. The magneto-optical isolator comprises a polarization light splitting element which can penetrate through first polarization light and block second polarization light, and the polarization light splitting element is provided with a first area and a second area; the optical rotation device is opposite to the first area; the magnetic optical rotation element is arranged on one side, opposite to the polarization light splitting element, of the optical rotation device and is provided with a third area and a fourth area; the conduction assembly enables light rays entering the magnetic rotation element from one of the third area and the fourth area to go back and forth in the magnetic rotation element and then to be emitted out from the other one of the third area and the fourth area; light emitted from the first area is converted into one of first polarization state light and second polarization state light after passing through the optical rotation device and the magnetic optical rotation element, and light emitted from the second area is converted into the other one of the first polarization state light and the second polarization state light after passing through the magnetic optical rotation element and the optical rotation device. According to the magneto-optical isolator, the miniaturization design can be realized.

The utility model relates to the technical field of optical equipment, in particular to an output type optical isolator, which comprises an optical rotation sheet with a groove mechanism and a small-hole diaphragm. When returning light appears, the plano-convex lens converges light spots of the returning light for the first time, the small-hole diaphragm partially blocks the converged light spots, and the energy of the returning light is reduced; the biconcave lens is used for carrying out secondary convergence on the blocked light spots; the second polarization splitting prism divides the secondarily converged light spots into reverse P light and reverse S light; under the combined action of the magnetic rotation crystal and an external magnetic field, the reverse P light and the reverse S light rotate anticlockwise; the optical rotation sheet performs first clockwise rotation on the reverse P light after counterclockwise rotation, and the groove mechanism of the optical rotation sheet completely blocks the reverse S light after counterclockwise rotation; finally, the rotated reverse P light and the blocked reverse S light cannot pass through the first polarization splitting prism to be combined, so that the reverse P light and the blocked reverse S light are isolated, and the damage of the returned light to a front-end laser element is avoided.

The application provides a method and device for identifying a lesion range of a urinary system by using interference optics, and the method comprises the following steps: obtaining a polarized image corresponding to a multi-layer optical rotation tomogram by filtering through a polaroid, and generating an original polarization image containing interference fringes and tissue texture; performing line extraction, intersection removal, Gaussian mask and smoothing reconstruction processing on the original polarization image to generate an interference bright line image; according to the light and dark distribution of the interference bright line image, optical rotation calculation and Mueller matrix correction are sequentially performed to generate tissue optical rotation distribution data; and the lesion range is identified by matching the tissue optical rotation distribution data with a preset calibration sample. Through multi-wavelength orthogonal polarization interference and optical rotation accurate detection, the ability to distinguish flat lesions and inflammatory mucosa is improved from the root, and the lesion boundary identification accuracy and identification efficiency are significantly improved.

The non-intrusive measuring system for the glucose concentration of the aqueous humor of the eyes comprises a linear polarization collimation light source which emits an incident polarized light beam along an advancing optical axis at a linear polarization starting angle, penetrates through a cornea, enters the aqueous humor and generates an emergent polarized light beam; the linear polarization starting angle of the incident polarized light beam is defined as a 45-degree rotation angle along the advancing direction of the advancing optical axis; the first polarization beam splitter is used for splitting the emergent polarized light beam into two emergent polarized light beam components with orthogonal polarization directions, and the two emergent polarized light beam components are respectively polarized at 0-degree and 90-degree rotation angles along respective advancing optical axis directions; the two light sensors are used for respectively measuring the light intensity of the two emergent polarized light beam components; an arithmetic processor for subtracting the light intensity to obtain a Schtort vector S1 component related to the amount of rotation of the polarization angle; and normalizing the S1 component by adding the light intensities of the emitted polarized light beam components as a standard value.

The utility model provides a reflective circulator for multiplexing crystals, which comprises a first multichannel circulator module, and the first multichannel circulator module comprises a first collimator array, a first light splitting crystal, a first half-wave plate group, a first optical rotation device, an offset crystal, a second optical rotation device and a first reflector which are sequentially arranged along a first direction; moreover, a second multi-channel circulator module is also arranged, and the second multi-channel circulator module comprises a second collimator array, a second light splitting crystal, a second half-wave plate group, a third optical rotation device, an offset crystal, a fourth optical rotation device and a second reflector which are sequentially arranged along a second direction. The first direction is perpendicular to the second direction. According to the utility model, the volume of the reflective circulator can be reduced.

The utility model is suitable for the technical field of optical equipment, and provides a Faraday rotator, an optical isolator and an optical circulator. The Faraday rotator comprises a magneto-optical component and a magnetic field applying piece, and the magnetic field applying piece can apply an external magnetic field to the magneto-optical component; the magneto-optical component can enable the polarization state of the polarized light to rotate by a preset angle along a first turning direction in an external magnetic field, and the preset angle forms an optical rotation angle; the magneto-optical component is provided with a light incident surface and a reflecting surface which are oppositely arranged, a first light-transmitting film and a second light-transmitting film are sequentially arranged on the light incident surface, and a first reflecting film is arranged on the reflecting surface; when one of the first light-transmitting film and the second light-transmitting film passes through the polarized light propagating toward the first reflective film, the other passes through the polarized light and emits the polarized light to the outside of the magneto-optical member. By means of the design, the Faraday rotator can still achieve the original effect on the premise that the size of the magnetic field generating piece is reduced, and reduction of the overall size of the Faraday rotator is facilitated.

The application discloses a method for measuring liquid density by using optical active solution, which comprises a laser, a polarizer, a liquid to be measured, an optical active solution, a transparent water tank, an electronic balance, an analyzer and a light screen. γ The optical active solution is filled in the transparent water tank with a length of l, and the mass of the optical active solution is γ, the mass of the solute is γ1, and the density is ρ X A certain mass (X) of the liquid to be measured is added, and after being uniformly stirred, the optical activity α of the mixed solution is measured by rotating the analyzer and the light screen; the relationship between X and α is obtained, that is, the data are linearly fitted by using a graphing method, and the density ρ X of the liquid to be measured is calculated by the slope of the straight line. The application is a method for measuring liquid density, and has clear physical principle, simple measurement process, high measurement accuracy and high repeatability.

To provide a simple and highly accurate photocurrent sensor.SOLUTION: A photocurrent sensor comprises: a polarized light separation portion provided between a light source and an optical fiber; a reflection portion provided at the other end of the optical fiber to reflect measurement light transmitted through the polarized light separation portion and incident on the optical fiber and including an optical rotator for optically rotating incident polarized light by approximately 45 degrees; a sensor fiber provided between the polarized light separation portion and the reflection portion; a detector that converts the measurement light subjected to intensity modulation by reciprocating in the sensor fiber and passing through the polarized light separation portion again into an electric signal.SELECTED DRAWING: Figure 1