The invention relates to a three-dimensional multi-beam laser parameter regulation and control method and system; the method comprises the steps: carrying out the initialization of a laser system, obtaining a hologram of an output light field, generating a plurality of laser beams, and enabling the plurality of laser beams to enter a light spot energy and position sensing assembly through a lightpath, wherein the light spot energy and position sensing assembly sequentially collects energy and position information of all laser beams with focuses not located on the same plane; carrying out feedback modulation until the energy and position information are matched with preset target energy and position information, and controlling, by the laser system, the light paths to be switched so that the multiple laser beams can enter a target area through the light paths. In the invention, energy and position information of each laser beam is dynamically adjusted, parameter information and qualityof the output laser beams are monitored in real time and control is flexible; it is guaranteed that each laser beam entering a target area reaches a corresponding set target, optical system errors are effectively reduced, each laser beam can be modulated randomly and accurately; the method and system has effects of multiplying improvement of laser utilization rate.

Three-dimensional multi-beam laser parameter regulation and control method and system

The invention discloses a beam deflection system control method based on liquid crystal, and aims at the problems of high delay in the process of two-dimensional beam deflection control based on a liquid crystal spatial light modulator. According to the method, the feedback delay is reduced by a non-imaging detection PSD device based on the PID control algorithm, and the response delay is reduced by an FPGA-based HDMI driver so that a controlled object composed of the driver and the liquid crystal spatial light modulator is constructed, and the PSD is used as the feedback loop. According to the method, the beam deflection system is improved from the control device, the delay is reduced on the basis of feedback control with combination of the capability of the PSD device and the FPGA-based HDMI driver and the system bandwidth and the tracking accuracy can be enhanced.

Beam deflection system control method based on liquid crystal

Provided are a focal-point testing method and apparatus (200) for substance detection, as well as a storage medium and a device (300) for use with the testing apparatus (200). The testing apparatus (200) comprises: a camera device and a laser emitter, wherein the focal point of the laser emitter is located on the focal plane of the camera device. The method comprises: acquiring, in order, Raman spectrum data, the area of a point of light, and image characteristics of a determination area for each moment of collection (101); and when, at a first moment of collection, the area of a point of light is not within a first threshold range, or when, at the first moment of collection, the image characteristics of a determination area are not within a second threshold range, outputting notification information (102). Focal-point shifts can be discovered in a timely manner when Raman testing is carried out.

Focal-point testing method and apparatus for substance detection, and storage medium and device

The invention discloses a method for realizing light beam focusing feedback control based on a liquid crystal spatial light modulator, a programmable Fresnel lens structure is generated by utilizing the liquid crystal spatial light modulator, and precise axial offset and lateral offset adjustment for a beam focus are realized through performing phase or amplitude modulation on the light beam; on that basis, an area-array detector is utilized to detect tree-dimensional migration of the beam focus, real-time feedback control for beam focus three-dimensional position is further realized through combining a closed-loop algorithm and image processing According to the invention, the method has advantages of fast speed, high precision and small volume and is convenient to realize focus position three-dimensional control

Method for realizing light beam focusing feedback control based on liquid crystal spatial light modulator

Popular Tasks used by Researchers

How can I help with your research?

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

We encountered an error while loading the panel. Please try refreshing the page.

Something went wrong

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

Anyone with the link can view this chat. You can switch it back to private anytime.

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Chen Zhifeng

Author Tools

Chat about Author

Papers

Method for realizing light beam focusing feedback control based on liquid crystal spatial light modulator