Dissertation > Excellent graduate degree dissertation topics show

Design of an Athermalized MWIR and LWIR Dual-band Optical System

Author: ZhangChunYan
Tutor: ShenWeiMin
School: Suzhou University
Course: Optical Engineering
Keywords: Infrared dual-band Athermalization Aberration Cooke structural type Optical design
CLC: TN21
Type: Master's thesis
Year: 2011
Downloads: 261
Quote: 0
Read: Download Dissertation

Abstract


Based on the MWIR and LWIR optical systems can respectively image high temperature and normal temperature objects, a MWIR and LWIR dual-band optical system could effectively improve target detection and recognition ability of IR imagers. As the infrared materials are sensitive to the temperature, the change of the temperature often degrades the image quality. To the imaging characteristic of MWIR and LWIR and the thermal aberration caused by temperature variation, study on an athermalized MWIR and LWIR dual-band optical system is carried out in this thesis.In the first chapter, the significance of this issue is introduced and the development of IR dual-band optical systems is reviewed.In the second chapter, at first, the performance of the infrared detection is introduced. Then, combined with using two-color detection and based on the performance requirement of our optical system, the structural type suitable for its dual-band IR optical system is analyzed and selected. At last, the Cooke structural type is selected.In the third chapter, the design theory of the dual-band IR optical system is given. First, the necessity of its achromatic aberration is introduced. Second, the effect of environmental temperature fluctuation on the single thin lens is researched, educing the necessity of athermalization. Third, compared with various athermalization methods optical passive method is preferred. Finally, the initial layout of the optical system is calculated using the primary aberration theory.In the fourth chapter, an athermalized MWIR and LWIR dual-band optical system is designed. Its optimization method, optimized result and imaging quality are given. The designed system has the advantages of structural compactness, large back focal length and 100% cold shield efficiency. It is not only used combined with two-color detection, but also imaging in MWIR and LWIR separately by inserting a beam splitter in the front of image plane.In the fifth chapter, based on the designed athermalized dual-band IR optical system, the principle of its tolerance analysis and distributing is introduced. Its tolerance is distributed optimally for facilitating its fabrication.In the last chapter, the work and the innovation points are concluded and further researches prospected.

Related Dissertations

  1. Based on cross- transfer function calculation method of spatial image distortion,TP391.41
  2. The Research for Small-sized Reflecting/Catadioptric Telescope,O439
  3. Surface exposure of light-cured experimental study of rapid prototyping,TH16
  4. Radial shearing interferometer optical system design and research,TH744.3
  5. Corneal Spherical Aberration before and after Cataract Surgery and Customisation of Intraocular Lens Asphericity,R779.66
  6. The Higher Order Aberrations in Eyes with Visual Symptoms after LASIK,R779.63
  7. Design of aerial camera lens,V245.6
  8. Effects of Dichloro-diphenyl-trichloroethane on Genotoxic in Chinese Hamster Lung Fibroblast V79 Cells,R114
  9. Comparative Study of Visual Function in Cataract Patients after Implantation with Aspheric and Spherical Intraocular Lenses,R779.66
  10. Research About the Intensity and Spectrum Property of Laser Beams in Fractional Fourier Transform Systems,O436.1
  11. The Research on the Properties of Starch and Browning of Different Varieties of Potatoes at Different Growing Stages,S532
  12. Large field of night vision optical system design,TH74
  13. LED line lights for aircraft precision approach runway,TM923.57
  14. Research on Diffractive-refractive Dual Band Infrared Imaging Optical System Based on DMD,TN976
  15. The Clinical Analysis of Different Intraocular Lens Implantation for Cataract with High Myopia,R779.66
  16. Study of Tilt and Decentration of Aspheric Intraocular Lenses in the Lens Capsule and the Effect on Visual Quality,R779.6
  17. The Study of Imaging Spectrometer Based on Spectral Prism,TH744.1
  18. Research on the Technology of Miniature Zoom System,O435
  19. A Design of Isolated Retina Optical Visual Simulator,O439
  20. Optimization and Development of a Miniature Ultraviolet Flat-field Spectrometer,TH744.1
  21. Zoom system research and design,TB852.1

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Infrared technology and equipment
© 2012 www.DissertationTopic.Net  Mobile