Dissertation > Excellent graduate degree dissertation topics show

Developed 1.57μm wavelength laser damage threshold of optical surfaces test systems

Author: XuRui
Tutor: NiXiaoWu
School: Nanjing University of Technology and Engineering
Course: Optical Engineering
Keywords: laser damage OPO beam expander CCD damage threshold image processing
CLC: TN247
Type: Master's thesis
Year: 2012
Downloads: 75
Quote: 0
Read: Download Dissertation

Abstract


This paper follows the international standard ISO11254-1 and GB/T16601 in 1-on-l test part of the requirement. We designed the optical surface laser damage threshold test system of the eye-safe band, and successfully build a optical surface laser damage threshold test system which can automated tests.According to the test system requirements, we made a study and design of laser light source to the system. From the three-wave mixing and phase matching angle, we derived how OPO works. We proposed the use of external cavity to product laser light source, and the use of Galileo-style telescope system to expander the beam, we use three sets of eight neutral absorption-type filters and the stepper motor to achieve a combination of energy attenuation,and use the CCD which is based on the up-conversion of fluorescent material to measure laser beam quality, and successfully made the beam which has the diameter of 6 mm, and a large divergence angle focused to a diameter of one hundred microns, and the energy levels which is more than 100, and succefully achieve real-time online monitoring of beam quality.We analyzed the different methods of the identification of the optical surface laser damage, and from the point of automation, we proposed to use laser light scattering、plasma flash and computer image processing technology to determine the damage of optical materials, Thereby reducing the factors of man-made miscarriage of justice, improve the accuracy of determination. In the computer image method, we studied the corresponding algorithm, and the experiments show that several algorithms mentioned in the text to determine the damage can be achieved.Results of this study have been used for 1.57μm optical surface laser damage threshold test system.

Related Dissertations

  1. Study on Two Dimensional of Auto-Collimator Based on DSP,TH741.14
  2. Research on Temperature Measurement Technique Based on CCD Image Sensor,TH811
  3. Research on Basic Algorithms of Digital Image Processing and Implementation with FPGA,TP391.41
  4. Research of Images Enhancing Algorithms on Fog or Backlighting Conditions and Implementation with Hardwares,TP391.41
  5. Research on the Image Real-Time Acquisition, Storage and Image Processing System,TP391.41
  6. The Research of Moving Object Tracking System Based on Embeded Image Process Unit,TP391.41
  7. Research on Visual Servo System of Mechanical ARM,TP242.6
  8. Application Research of Digital Image Processing on Container Inspection,TP274.4
  9. Three-Dimensional Numerical Modelling for the Head and the Electric Field Analysis of DBS,R742.5
  10. Application of Semi-Structure in Leisure Dress,TS941.2
  11. Research on Nondestructive Detection Technology for External Qualities of Papayas Based-on Vision,S667.9
  12. Research on Detecting Optical Fiber Geometric Parameter Based on Machine Vision,TN253
  13. Research on Identification System of Cashmere and Wool Fiber,TS101.921
  14. Design of Garlic Planting Sorting Machine Based on Image Processing,S223.2
  15. Study on Detection and Grading of ’Jiro’ Persimmon’s External Quality Based on Computer Vision,S665.2
  16. Flow Behavior Description of Two-Phase Flow Based on Image Processing Techniques,TP391.41
  17. Research of Non-contace Diameter Measurment System Based on Linear CCD,TH711
  18. The Designing of HD Vehicle Detection System Based on Fpga,TP391.41
  19. Machine Vision’s Research and Application in the SMM of SMT,TP391.41
  20. The Discrimination of Rice Weeds Based on DSP,TP391.41
  21. The Developing of Cotton "Three Wire" Automatic Removing System Based on CCD Detection Technology,TP391.41

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Optical detection techniques
© 2012 www.DissertationTopic.Net  Mobile