1489 results about "Optical power" patented technology

The invention provides an optical lens, which comprises eight lenses with focal power and sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface; the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a convex surface; and the object side surface of the eighth lens is a convex surface, and the image side surface of the eighth lens is a concave surface. According to the optical lens provided by the invention, the imaging quality of the optical lens can be improved, and the optical lens has the advantage of excellent imaging quality.

The invention provides an optical lens, which comprises eight lenses with focal power and sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the seventh lens has positive focal power, and the object side surface of the seventh lens is a convex surface; and the image side surface of the eighth lens is a convex surface. According to the optical lens provided by the invention, the imaging quality of the optical lens can be improved, and the optical lens has the advantage of excellent imaging quality.

The invention provides an optical lens, which comprises four lenses with focal power and sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the image side surface of the fourth lens is a convex surface; wherein the maximum field angle FOV of the optical lens and the real image height IH corresponding to the maximum field angle of the optical lens meet the following conditions: 35 degrees / mmlt; fOV / IHlt; 46 degrees / mm; the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy 0.5 lt; f3 / f4lt; and 0.8. According to the optical lens provided by the invention, through specific surface shape matching and reasonable focal power distribution, the lens has one or more advantages of an ultra-wide angle, a large aperture, high imaging quality, high collimation and the like.

The invention discloses a device and a method for testing a MicroLED wafer array. The device comprises a wafer slide holder, a MicroLED test device and a photometric integrating sphere, a MicroLED wafer is arranged on the wafer slide holder; the MicroLED wafer is provided with a MicroLED wafer array, and the MicroLED wafer array is provided with a plurality of The MicroLED wafer array is composed of a plurality of MicroLEDs which are distributed in an array form; the MicroLED test equipment comprises a flexible electrode and a TFT (Thin Film Transistor) addressing circuit; the wafer slide holder is used for enabling a MicroLED wafer to be aligned with the MicroLED test equipment so as to enable the MicroLED to be lightened, and visible light emitted after the MicroLED is lightened is transmitted to the photometric integrating sphere through the MicroLED test equipment; the photometric integrating sphere is used for testing optical parameters of the MicroLED; the optical parameters comprise optical power and wavelength; and the TFT addressing circuit is used for providing current, voltage and position parameters of the MicroLED. According to the device and the method, the optical parameters and the position of each MicroLED in the MicroLED wafer array can be rapidly tested in a lossless and high-throughput manner.

An optical computation system includes a light source configured to produce a pump beam, an optical modulator configured to modulate the pump beam based on the modulation mask to generate a modulated beam, a non-linear medium configured to convert a portion of the modulated beam to a second harmonic (SH) beam and to produce an output including the SH beam and an unconverted portion of the pump beam, and a dichroic mirror configured to receive the output of the non-linear medium and to decouple the SH beam and the unconverted portion of the pump beam, a detector configured to detect a first optical power of the unconverted portion of the pump beam and to detect a second optical power of the SH beam, and a controller configured to generate an updated modulation mask based on the first and second optical powers for transmission to the optical modulator.

The utility model provides an all-glass vehicle-mounted day and night confocal optical system and a camera module applying the same, mainly comprising eight lenses, the first lens has negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface, the second lens has negative focal power, the object side surface is a concave surface, and the image side surface is a convex surface. The third lens has positive focal power, the object side surface is a convex surface, the image side surface is a concave surface, the fourth lens has negative focal power, the object side surface is a convex surface, the image side surface is a concave surface, the fifth lens has positive focal power, the object side surface is a convex surface, the image side surface is a convex surface, and the fourth lens and the fifth lens form a bonding lens. The sixth lens has positive focal power, the object side face of the sixth lens is a convex face, the image side face of the sixth lens is a convex face, the seventh lens has negative focal power, the image side face of the seventh lens is a concave face, the eighth lens has focal power, and the image side face of the eighth lens is a concave face. And the picture illumination uniformity and the imaging definition are improved.

The invention relates to the technical field of aging test, and discloses a laser chip accelerated aging test method, which comprises the following steps: synchronously measuring the optical power, the threshold current, the slope efficiency and the emergent wavelength of a laser chip in an accelerated aging environment to obtain a time sequence data matrix; performing double sparse dictionary decomposition on the time series data matrix to obtain a normal feature coefficient and a degradation feature coefficient; calculating a target characteristic value of the time-varying covariance matrix based on the degradation characteristic coefficient, and generating a dynamic characteristic value sequence and a corresponding degradation stage identifier according to the target characteristic value; and based on the degradation stage identifier, inputting the dynamic characteristic value sequence into a life prediction model for life prediction, and obtaining the remaining service life. The method can accurately capture the nonlinear characteristic and the time evolution mode of the laser chip degradation process, automatically identify the time period characteristic which contributes to life prediction, and improve the service life of the laser chip. And the accelerated aging test accuracy of the laser chip is improved.

The invention provides a projection lens, which comprises seven lenses from a projection surface to an image source surface along an optical axis: a first lens with negative focal power; the second lens has positive focal power; the surface of the image source side of the third lens is a convex surface; the surface of the projection side of the fourth lens is a concave surface, and the surface of the image source side of the fourth lens is a convex surface; the surface of the projection side of the fifth lens is a convex surface, and the surface of the image source side of the fifth lens is a concave surface; the surface of the projection side of the sixth lens is a convex surface, and the surface of the image source side of the sixth lens is a convex surface; the seventh lens has positive focal power; the surface curvature radius R7 of the projection side of the fourth lens and the surface curvature radius R8 of the image source side of the fourth lens meet the following formula:-0.6 lt; (R7-R8) / (R7 + R8) lt; 0. According to the projection lens provided by the invention, the projection quality of the projection lens is improved through the reasonable configuration of the surface types of the lenses and the reasonable matching of the focal power.

The invention relates to the technical field of optical switches, in particular to a high-speed optical switch, which is characterized by comprising a first silicon nitride waveguide, the first silicon nitride waveguide is also provided with a first optical path distribution unit, and the first optical path distribution unit is used for correspondingly distributing a first input optical signal into corresponding N paths of first output optical signals; the first end and the second end of the silicon waveguide are respectively connected with the first silicon nitride waveguide and the second silicon nitride waveguide; the silicon waveguide is connected with a branch waveguide, and the branch waveguide is used for separating a branch optical signal with a specific proportion from a first output optical signal transmitted in the silicon waveguide; and an optical power detection unit is arranged on the branch waveguide. The problem that the optical signal of the existing optical switch is difficult to correct online is solved.

The invention provides a satellite-borne EDFA on-orbit performance degradation monitoring method and system. The satellite-borne EDFA on-orbit performance degradation monitoring method comprises the steps that a health baseline is preset; closing input light and a first-stage pump of the satellite-borne EDFA; driving a second-stage pump of the satellite-borne EDFA to maintain fixed power output, and recording the working temperature of the second-stage pump; acquiring the monitoring optical power of the second-stage pump and the spontaneous radiation power of the output end of the satellite-borne EDFA; calculating to obtain spontaneous radiation conversion rate; and carrying out satellite-borne EDFA degradation determination. The method has the beneficial effects that the interference of temperature fluctuation on a monitoring result is greatly reduced through the spontaneous radiation conversion rate which is a relative parameter, and the method is adaptive to a complex thermal environment of a satellite; degradation is judged based on a preset health baseline, precise monitoring of the performance state of the satellite-borne EDFA is achieved, and a reliable basis is provided for maintenance. Precise positioning of a degraded part is realized, a fault source is clear, blind maintenance is avoided, and the maintenance efficiency is improved; monitoring can be completed in a second level and can be arranged to be carried out in a communication intermittent period, and normal communication service of the satellite is not affected.

The waveguide carrying a nonlinear crystal with reflective interface, a pump photon source and a circulator define an optical parametric amplifier which uses optical power from the pump photons to boost incoming signal and idler photons which carry the encoded signal. The nonlinear crystal performs optical parametric amplification upon the incoming optical signal in a quantum photonic process that generates additional signal and idler photons to thereby boost the intensity of the incoming signal. A photodetector is coupled for communication with the third port and operative to convert the reflected optical signal into an electrical signal defining the output of the communications receiver.

The invention provides a transmitting-receiving axis deviation compensation method based on transmitting optical axis nutation scanning, and the method comprises the steps: carrying out the parameter pre-configuration of a space laser communication system through simulation, then initializing a variable, entering a nutation cycle, collecting the optical power data of a plurality of sampling points through a receiving end, and carrying out the nutation scanning according to the collected optical power data through a gradient acceleration nutation algorithm, calculating an optical power gradient and an optimal direction, adaptively adjusting a nutation step length, updating a pointing coordinate according to the adjusted nutation step length, judging whether convergence is carried out or a preset maximum period number is reached, and outputting a result after circulation is finished. Under the same precision, the number of iterations is reduced by about 50%-60% compared with a traditional nutation algorithm, additional data acquisition is not added, equipment such as a pyramid does not need to be additionally prepared, hardware overhead is saved, and parameter robustness is high.

The invention provides a temperature compensation method and device for laser frequency doubling, electronic equipment and a storage medium. The method comprises the steps that the initial temperature of a frequency doubling crystal of a frequency doubling laser is determined according to the power of input fundamental frequency light; adjusting the initial temperature, and determining a target temperature corresponding to the maximum value of the frequency-doubled optical power output by the frequency-doubled laser; according to the invention, active following compensation is carried out on the temperature of the frequency doubling crystal, and the temperature of the frequency doubling crystal is controlled at the target temperature, so that the active following compensation is carried out on the temperature of the frequency doubling crystal, thereby enabling the frequency doubling laser to maintain high output power, and further improving the frequency doubling efficiency of the crystal. Therefore, the laser frequency multiplier can quickly reach a steady state in the power switching process, and accurate dynamic control of the laser frequency multiplication system is realized.

A method of monitoring a subject with an opto-physiological sensor system is described herein. The method comprises obtaining a model of the optical properties of at least one body tissue type to be monitored, wherein the model of the optical properties comprises a definition of static (DC) and dynamic (AC) components of transmitted optical power and a definition of a source-detector separation related to a normalised path length for an illumination source of the opto-physiological sensor: obtaining an indication of at least one physiological property of the subject from a wearable device worn by the subject: obtaining an indication of at least one physical variable from the wearable device worn by the subject; determining, using the opto-physiological model, how the at least one physical variable affects the at least one physiological property; and determining a corrected value for the physiological property based on the determination of how the at least one physical variable affects the at least one physiological property.

The invention relates to a 1.2-inch intelligent traffic monitoring system lens and a working method thereof. An optical imaging system of the lens is sequentially provided with a first lens to a fourteenth lens from an object space to an image space. Wherein the focal power of each lens adopts a positive and negative combined form, so that optical aberrations such as spherical aberration and the like are greatly reduced. Wherein the fourth lens and the fifth lens form an achromatic doublet lens group, the seventh lens and the eighth lens form an achromatic doublet lens group, the ninth lens and the tenth lens form an achromatic doublet lens group, and the eleventh lens, the twelfth lens and the thirteenth lens form an achromatic triplet lens group. Through reasonable lens matching, an optical system realizes large aperture, large target surface and no defocus in day and night, and through good correction of on-axis and off-axis aberrations, the lens has good imaging quality.

The invention discloses a mode-hopping-free scanning control method for a narrow-linewidth laser, and belongs to the technical field of laser control. The method comprises the following steps: generating a reference current scanning signal and a reference voltage scanning signal; generating a high-frequency jitter signal, and superposing the high-frequency jitter signal with the reference current scanning signal to generate a total injection current for driving the narrow linewidth laser; acquiring a real-time optical power feedback signal of the narrow linewidth laser; according to the optical power feedback signal and the high-frequency jitter signal, a mode margin error signal is generated through demodulation, and the mode margin error signal is used for representing the mode stability of the current working state of the narrow linewidth laser; and generating a dynamic correction voltage according to the mode margin error signal, and superposing the dynamic correction voltage and the reference voltage scanning signal to generate a total driving voltage for driving piezoelectric ceramics of the narrow linewidth laser. Through predictive feed-forward correction, mismatch is compensated and controlled in real time, and the mode hopping phenomenon is effectively inhibited.

The invention provides a network topology relation graph dynamic generation method, which belongs to the technical field of network topology, and comprises the following steps: starting an improved Tarjan strong connectivity component algorithm in each subnet partition to carry out loop detection, executing distributed loop verification on cross-subnet boundary nodes, collecting ARP table entries, routing table entries, OpenFlow flow tables and virtualization platform interface data, and sending the ARP table entries, the routing table entries, the OpenFlow flow tables and the virtualization platform interface data to each subnet partition; the method comprises the following steps: performing power spectrum analysis on an optical power monitoring point on optical network equipment to identify a wavelength channel occupancy state, reconstructing a wavelength routing path of a DWDM system, and performing two-stage submission on topological data acquired by distributed detection nodes by adopting a causal consistency protocol to synchronously generate a global unified network topological relation graph; the technical problems that the incremental updating efficiency is low and the cross-layer mapping relation is difficult to reconstruct in real time when the network topology dynamically changes are solved.

The invention provides a laser communication stable transmission method based on dynamic compensation of a transmitting optical axis, which comprises the following steps: firstly initializing variables, then establishing a link to track communication, entering SPGD circulation in the tracking process, carrying out positive and negative disturbance on an angle of a transmitting end, collecting optical power data by a receiving end, obtaining a corresponding evaluation function, counting optical power fluctuation, and adopting an improved SPGD iterative formula to determine the dynamic compensation of the transmitting optical axis. And calculating a transmitting end optical axis pointing angle of next iteration, controlling transmitting optical axis compensation according to the pointing angle, then judging whether convergence or reaching a preset maximum period number is carried out or not, if not, continuing iteration, and if so, ending circulation. In the autonomous calibration process, normal work of a communication link is kept, rapid information feedback and processing are achieved through the continuously existing communication link, the response speed and stability of the system are improved, convergence is conducted by combining an SPGD algorithm and adopting small signal jitter, accidental link breakage can be avoided to the maximum extent, and cooperative dynamic compensation of the optical axes of receiving and transmitting is achieved; and the convergence speed is improved by 50%.

The invention belongs to the technical field of optical modules, and particularly relates to a CPO module structure which comprises an installation shell, a switching chip, an optical engine, a light source system and an auxiliary monitoring system, the switching chip and the optical engine are installed on a supporting substrate in the installation shell, an optical fiber coupling interface is arranged on the outer side of the installation shell, and the optical fiber coupling interface is connected with the optical source system. The optical fiber link is used for connecting the optical engine and external computer equipment; according to the CPO module structure, related data such as power management, temperature management and link connection signal stable state of the CPO module structure in the use process are monitored in real time through the configured auxiliary monitoring module, and the data are collected through optical power, temperature, current sensors and the like; when abnormal data occur in the monitoring process, troubleshooting and positioning and automatic maintenance and troubleshooting can be rapidly carried out, the frequency of disassembly, maintenance and repair is reduced, and the use experience is improved.

The invention provides an optical access network PON port fault prediction and operation and maintenance support method and system, and the method comprises the steps: collecting real-time multi-index sequences of optical power, bit error rate, temperature, frame loss rate, business load and the like, automatically extracting a long-term trend based on variational mode decomposition, constructing a residual sequence, generating a state transition map through employing a Markov transition field algorithm, and carrying out the fault prediction and operation and maintenance support of the PON port. And future operation state distribution prediction is realized through the LSTM neural network. And after an abnormal threshold is dynamically adjusted in combination with quantile regression, a time sequence prediction result and a threshold response are fused to output a comprehensive fault probability score, and an early warning signal is triggered through exponential smoothing and continuity check, so that the progressive fault detection accuracy and advancement can be improved, and an efficient and steady prediction and early warning basis is provided for intelligent operation and maintenance of the PON port.

The invention relates to the technical field of optical communication, in particular to a steady-state control method and device of an optical fiber amplifier, control over a plurality of pump lasers in an erbium-doped fiber amplifier (EDFA) is achieved in a mode of combining feed-forward control and feedback control, and the feed-forward control is used for obtaining initial pump current; according to feedback control, proportional integral differential calculation is carried out on an input and output optical power difference value to obtain a pump current correction amount; carrying out transient detection on the input optical power, correcting a proportional integral differential coefficient when the transient state occurs, and obtaining a pump current correction amount through a corrected proportional integral differential algorithm so as to obtain a master pump driving current; by distinguishing the transient effect of the input optical power and the judgment of the jitter of the input optical power, the requirement that the output optical power needs to be stably controlled when the transient state of the input optical power and the jitter of the input optical power occur is well met, and the defects that the transient index is poor and the jitter is poor are overcome. And meanwhile, the situation that the jitter of the output optical power is aggravated due to the jitter of the input optical power is inhibited.

The invention provides an optical lens. The optical lens comprises a lens barrel, and a lens group and a spacing assembly which are accommodated in the lens barrel. The lens group comprises a first lens with focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with positive focal power and a sixth lens with positive focal power which are sequentially arranged from the object side to the image side along the optical axis. The sixth lens has positive focal power, the seventh lens has negative focal power, and the eighth lens has focal power, and in the air intervals of any two adjacent lenses in the lens group on the optical axis, the air interval of the sixth lens and the seventh lens on the optical axis is the largest; the spacing assembly comprises first, second, third, fourth, fifth, sixth and seventh spacing elements; the optical lens satisfies the following conditions: 3.60 < d6m / T67 < 7.55; the d5m / (CT6-CT7) is more than 11.85 and less than 13.60.

The invention provides a system and method for power auto-regulation in an out-of-band communication based optical transceiver. The system includes an optical transceiver comprising: one or more optical receptacles, each configured to engage with a corresponding one of the one or more optical receptacle mating members; and transceiver circuitry configured to enable communication of optical signals via the one or more optical receptacles. The optical transceiver is configured to: establish an optical connection with a peer optical transceiver; setting a transmit (Tx) optical power used during transmission of the optical signal to the peer-to-peer optical transceiver to a predetermined initial value; and performing a power auto-regulation of transmit (Tx) optical power during optical communication with the peer-to-peer optical transceiver via the optical connection. Based on the technical scheme disclosed by the invention, the Rx damage power related problem can be solved in a manner of overcoming the limitation and / or defects of any conventional technical scheme and not influencing the overall performance and / or quality of optical communication.

The invention relates to the technical field of optical signal transmission, in particular to an optical fiber polarization measurement system and method. The optical fiber polarization measurement system comprises a light source which is located at the light incident side of a to-be-measured optical fiber and is used for inputting detection laser to the to-be-measured optical fiber; the optical fiber temperature control assembly is circumferentially arranged along the periphery of the to-be-measured optical fiber and is used for adjusting the temperature of the to-be-measured optical fiber; the light-emitting optical fiber is the same as the optical fiber to be detected in model and is welded with the output end of the optical fiber to be detected through polarization-maintaining welding; the heat preservation rotating assembly is arranged close to the output end of the light-emitting optical fiber and used for providing a constant-temperature environment for the light-emitting optical fiber and driving the light-emitting optical fiber to rotate concentrically. The polarization analyzing assembly is located at the output end of the light-emitting optical fiber and used for screening the output laser output by the light-emitting optical fiber based on the polarization direction; the photoelectric detection assembly is located on the side, away from the light outlet optical fiber, of the polarization detection assembly and used for detecting the optical power of the polarized laser screened by the polarization detection assembly. The measuring efficiency can be effectively improved, the cost is reduced, and the structure is simplified.

The invention relates to the technical field of laser control, and discloses a laser control method and device for an ultra-pulse thulium-doped fiber laser operation system, and the method comprises the steps: generating a PWM time-base waveform through an FPGA, and generating a reference duty ratio instruction based on a target pumping current value; the total response delay time of the acousto-optic modulator is calculated, the FPGA sends a trigger pulse to the acousto-optic modulator according to the total response delay time, the gated modulation laser is output to the optical fiber output end to obtain an analog voltage signal, and the analog voltage signal and the numerical value of the target power register are used for calculating a duty ratio correction increment; the duty ratio correction increment and the reference duty ratio instruction are updated to a duty ratio register of a PWM time base waveform, and multiple paths of pump cooperative driving waveforms are output. The technical problems of pump current response lag, acousto-optic modulator triggering jitter and optical power nonlinear saturation in an ultra-pulse thulium-doped fiber laser operation system are solved; and the laser pulse energy stability, the response speed and the long-term reliability are improved.

The invention relates to the technical field of optical fiber communication, in particular to optical fiber collimator full-automatic high-precision coupling assembly equipment which comprises a main body unit, a vertical adjusting unit, a gluing curing unit, a horizontal moving unit, a clamping positioning unit, an optical power detection module and a control module. Through full-process automatic collaborative design, standardized operation of assembly of the optical fiber collimator is achieved, the assembly period of a single product is shorter, the operation efficiency is improved, high-precision motion control and coaxial centering clamping are adopted, optical vibration isolation design and a hybrid optimization coupling optimization algorithm are matched, the product percent of pass can be further improved, and the production cost is reduced. The product consistency and reliability are improved, the waste of glue and other materials can be reduced by utilizing a double quality control mechanism of visual defect detection and real-time optical power feedback, the production cost is reduced, and the product quality can be further improved.

The invention relates to the technical field of optical scanning, and discloses an afocal optical system for scanning. Comprising an X-direction scanning galvanometer, a front lens group, a rear lens group and a Y-direction scanning galvanometer, the front lens group and the rear lens group are symmetrically arranged about a light convergence surface, the front lens group is located on the light emitting side of the X-direction scanning galvanometer, the rear lens group is located on the light emitting side of the front lens group, and the Y-direction scanning galvanometer is located on the light emitting side of the rear lens group; the front lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along the light propagation direction; the rear lens group comprises a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens which are sequentially arranged along the light propagation direction; wherein the focal length value of the afocal optical system is very large, that is, the focal power approaches to 0, so that after incident circular collimated light passes through the X-direction scanning galvanometer, the front lens group, the rear lens group and the Y-direction scanning galvanometer, the emergent light is still circular collimated light.

The invention provides an optical lens, which comprises seven lenses with focal power and sequentially comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface along an optical axis, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has negative focal power; the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface; the seventh lens has negative focal power; the optical total length TTL of the optical lens, the real image height IH corresponding to the maximum field angle of the optical lens and the maximum field angle FOV of the optical lens meet the following conditions: 0.17 lt; 1 degree * TTL / (IH / 2) / (FOV / 2) lt; and 0.24. According to the optical lens provided by the invention, the imaging quality of the optical lens can be improved, the aberration is reduced, and the imaging quality of the optical lens is improved.

The invention relates to the technical field of optical communication, in particular to a silicon optical chip monitoring method and device, electronic equipment and a computer readable storage medium, and the method comprises the steps: obtaining an input monitoring value and an output monitoring value integrated by a silicon optical chip, the input monitoring value is an input optical power value collected by an input monitoring photodiode integrated with the silicon optical chip, the output monitoring value is an output optical power value collected by an output monitoring photodiode integrated with the silicon optical chip, and a power ratio parameter is calculated according to the input monitoring value and the output monitoring value; the power ratio parameter is compared with a preset ratio range, and when it is detected that the power ratio parameter is not in the preset ratio range, it is determined that the silicon optical chip has an optical extinction ratio abnormal risk; and outputting a detection result containing the risk that the optical extinction ratio is abnormal, so that the real-time performance of abnormal detection of the optical extinction ratio of the silicon optical chip is improved.

The invention belongs to the field of quantum precision measurement, and particularly discloses an all-fiber phase detection system and method based on polarization interference quantum weak measurement. The device sequentially comprises a laser light source, a front selection module, a phase regulation and control module, a rear selection module and a photoelectric acquisition module along a light path. The front selection module prepares linearly polarized light emitted by the laser light source into two equal-amplitude superposition states in a cross-polarization mode as initial polarization states, and the phase regulation and control module senses the phase difference after change conversion of a physical quantity to be measured, dissipates the phase difference accumulated by the two polarization states in the sensing transmission process, and adjusts the phase difference of the two polarization states. And the post selection module performs nearly orthogonal projection measurement on the polarization state, in the process, a birefringence phase difference caused by a physical quantity to be measured is converted into a weak-value amplified light intensity signal, and the photoelectric acquisition module obtains the physical quantity to be measured by monitoring the relative variation of the optical power. Based on the quantum weak measurement principle, the birefringence phase difference caused by the to-be-measured physical quantity is converted into the weak value amplified optical power signal, and the sensing sensitivity is improved.