8 results about "He ne laser" patented technology

The application discloses a photoacoustic spectrum signal detection system and a detection method. The system comprises a signal acquisition device and a detection signal processing terminal. The signal acquisition device comprises an ultraviolet pulse laser, a first plano-convex lens, a second plano-convex lens, a focusing objective lens, a refractive prism, a helium-neon laser, an electric displacement platform, a polarization modulation assembly, a light splitting assembly and a differential detector. The photoacoustic spectrum signal detection system uses the specific absorption of cell nuclei to ultraviolet light, obtains a differential detection signal through the differential detector and generates an analysis spectrum. The light sensing assembly collects a light sensing signal of the sample and generates a microscopic image. The detection system can realize photoacoustic spectrum analysis of a cell nucleus level micro-sized absorber, thereby obtaining a high-resolution analysis spectrum and a microscopic image reflecting the physical properties inside the cell nuclei. The label-free and non-staining photoacoustic spectrum signal detection does not need staining and can save detection time, and the accuracy of cell detection on biological samples is improved.

The application discloses a vortex light interference device and method for measuring three-dimensional vibration and sound field rotation characteristics, wherein a helium-neon laser emits laser light, the laser light passes through a half-wave plate and a first polarization beam splitter prism, and is divided into object light and reference light; the object light passes through a first spiral phase plate and becomes vortex object light, the vortex object light passes through a second polarization beam splitter prism, a quarter-wave plate, and a beam expander lens, and is irradiated on a test sample surface, reflected light of the sample surface passes through the beam expander lens, the quarter-wave plate, the second polarization beam splitter prism, a beam splitter prism and a focusing lens, and is irradiated on a photodetector; the reference light passes through an acousto-optic modulator to generate frequency modulation, passes through a mirror and a second spiral phase plate to become frequency-modulated vortex light, and the vortex light passes through a beam splitter prism and a focusing lens and is irradiated on the photodetector; a computer calculates and demodulates frequency-modulated signals of the photodetector and modulation signals of the acousto-optic modulator, and finally obtains three-dimensional vibration information and sound field rotation characteristics of the sample.

The application discloses a kind of based on valley power lockout semi-out cavity linear polarization interference light source and its design method.The device includes laser power supply, laser, heating wire, heat preservation glue, beam splitter BS, PD photocell and laser frequency stabilization system;Design method is crucial in that: the laser is three longitudinal mode semi-out cavity linear polarization helium-neon laser, laser built-in Brewster window, and the key parameters of the laser are calculated by longitudinal mode light intensity coupling model, two side modes can be completely suppressed, form the high proportion valley bottom in light intensity harmonic curve, to facilitate frequency stabilization algorithm identification to realize central longitudinal mode frequency locking.The method of the application can make the output power of the laser reach 2.4mW or more, overcome the shortcomings of traditional double longitudinal mode frequency stabilization interference light source power limitation, improve single mode power conversion efficiency, provide a new type of frequency stabilization technology and new type of interference light source for the rapid development of ultra-precision machining and measurement technology and various fields such as single mode conversion complete, high output power, good wavelength stability.

This invention provides an intelligent control system and method for optimizing the intracavity mode of a high-reflectivity cavity mirror helium-neon laser. The system includes: a mode detection module for real-time detection of the output beam of the high-reflectivity cavity mirror helium-neon laser using a beam analyzer and photoelectric sensors to acquire monitoring data; an intelligent control module for analyzing the monitoring data based on machine learning algorithms and automatically adjusting the angle and position of the high-reflectivity cavity mirror according to optimization requirements; and a compensation module for compensating for laser performance based on environmental and monitoring data. This invention's intelligent control system and method for optimizing the intracavity mode of a high-reflectivity cavity mirror helium-neon laser monitors and optimizes the intracavity mode of the helium-neon laser in real time, greatly improving the output beam quality and stability of the laser. The system can adapt to environmental changes, reducing manual intervention and significantly improving the system's control accuracy and efficiency.

The invention discloses a polarization type measuring device and method based on vortex light interference, and belongs to the technical field of laser interferometers. Laser emitted by a helium-neon laser passes through a first lens group to be split into horizontal line polarized light and vertical line polarized light; the horizontal line polarized light serves as a measurement light beam, and the displacement variation to be measured is regulated and controlled through phase control of the first phase control assembly; the vertical linearly polarized light reference light beam realizes phase locking; and the displacement variation is calculated according to the light spot rotation angle value obtained by the light spot analyzer. The designed phase-locking control system obtains interference light intensity in real time and then adjusts voltage output to piezoelectric ceramics to complete phase locking, and interference of the external environment on the whole light path system is overcome. In addition, the phase-locked control system designed by the invention can realize locking of any phase, and has a great assistance effect on a traditional intensity type interferometer.

The invention provides an electronic water pump multi-mode cooperative control method and system based on LIN / PWM communication, electronic equipment and a storage medium, and relates to the technical field of vehicle thermal management systems.The method includes the steps that a vehicle turbocharging system pipeline pressure signal is collected, and frequency band energy analysis is conducted to obtain frequency spectrum energy information; a laser beam is emitted by the surface of an intercooler of a helium-neon laser, and vibration signals are inverted to obtain vibration mode information; the conditional generative adversarial network establishes a pressure and vibration incidence relation and generates a system coupling confidence parameter; multi-water pump working point distributed optimization is carried out to generate a cooperative control instruction; constructing a PWM signal sequence to form a control signal; and finally, a control signal is transmitted in a time division multiple access mode based on the LIN / PWM communication bus, and multi-mode cooperative control of the electronic water pump is achieved. Intelligent cooperative control of multiple electronic water pumps in a vehicle thermal management system can be realized.

The application discloses a device for generating annular structured light and a preparation method thereof, and the device comprises a helium-neon laser, a polarizer, a liquid crystal cell, an LED ultraviolet light source and a CCD which are sequentially arranged; the liquid crystal cell comprises two layers of substrates which are coated with orientation films, spacer particles and a liquid crystal layer, the spacer particles are arranged between the two layers of the orientation films of the substrates which are opposite to each other, and a filling space is formed for injecting the liquid crystal layer; the method for generating the annular structured light comprises three parts of preparation of a reconfigurable liquid crystal superstructure system, light path building and annular structured light acquisition. The application realizes the generation of the annular structured light by using the liquid crystal material, and the method for generating the amplitude type structured light by using the reconfigurable liquid crystal superstructure system has the advantages of simplicity, quickness, flexibility, reliability, low cost, reconfigurability and integration.

The application is a laser Doppler rotational speed calibration device, belonging to the technical field of Doppler velocity measurement, comprising a shell, a regulating cavity is formed in the inner side of the shell, an installation cavity two is formed in one end of the regulating cavity, an installation cavity three is formed in the end of the installation cavity two away from the regulating cavity, and a helium-neon laser is arranged in the inner side of the installation cavity three. The application solves the problem that only the inner cavity of the rotating drum can be detected, which requires the laser to be obliquely shot into the inner cavity of the rotating drum, and since the diameter and depth of the rotating drum of each centrifuge are different, the laser directly irradiating the rotating drum is hindered. In the application, the laser focusing points of the first and zero levels can be adjusted through the use of the sliding block, so as to facilitate the automatic adjustment of the detection distance of the device, make the laser focusing points hit the detection column, so that the outer side of the detection column is hit, and the rotation of the detection column can be detected, and the laser can directly hit the detection column horizontally.