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Hybrid refractive/diffractive optical system design for light and compact uncooled longwave infrared imager
Wang, Hu1,2; Bai, Yu3; Luo, Jianjun1; Wang, H.
Volume8416
Pages84162N
2012
Language英语
ISSN0277786X
DOI10.1117/12.975749
Indexed ByEi
Subtype会议论文
AbstractCompares with traditional optics,the difractive optical element(DOE) has unique property of minus dispersion.The special state can be used in the optical system to improve performance,lighten weight and reduce volume effectively.In the paper,an infrared optical system with DOE for LWIR thermal imager is proposed.The primary optical parameters of thermal imager are wavelength range 8.0- 12.0μm,effective focal length (EFL) 150 mm,f/numbe 1.0 and field of view 8.58 degrees.The system uses uncooled infrared detector with 320×240 pixels and 45μm pixel size. The f/number matches the sensitivity range of detector array. The infrared optical system is designed by CODE-V optical design software.It is consisted of two lens,the materials of the two lenses are Germanium.The DOE is fabricated on the convex of the first lens and it can be fabricated by diamond turning technology.The imaging quafity of the optical system approached to diffraction limit.The value of modulation transfer function (MTF) at Nyquist frequency(11lp/mm) is great than 0.78. © 2012 SPIE.; Compares with traditional optics,the difractive optical element(DOE) has unique property of minus dispersion.The special state can be used in the optical system to improve performance,lighten weight and reduce volume effectively.In the paper,an infrared optical system with DOE for LWIR thermal imager is proposed.The primary optical parameters of thermal imager are wavelength range 8.0- 12.0μm,effective focal length (EFL) 150 mm,f/numbe 1.0 and field of view 8.58 degrees.The system uses uncooled infrared detector with 320×240 pixels and 45μm pixel size. The f/number matches the sensitivity range of detector array. The infrared optical system is designed by CODE-V optical design software.It is consisted of two lens,the materials of the two lenses are Germanium.The DOE is fabricated on the convex of the first lens and it can be fabricated by diamond turning technology.The imaging quafity of the optical system approached to diffraction limit.The value of modulation transfer function (MTF) at Nyquist frequency(11lp/mm) is great than 0.78. © 2012 SPIE.
Conference NameProceedings of SPIE: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Conference Date2012
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Document Type会议论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/7472
Collection应用光学研究室(二室)
Corresponding AuthorWang, H.
Affiliation1. School of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China
2. Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China
3. Institute of Optics and Electronics, Chinese Academy of Science, Chengdu 610209, China
Recommended Citation
GB/T 7714
Wang, Hu,Bai, Yu,Luo, Jianjun,et al. Hybrid refractive/diffractive optical system design for light and compact uncooled longwave infrared imager[C],2012:84162N.
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