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长春光学精密机械与物... [1]
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会议论文 [1]
发表日期
2009 [1]
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Athermal design of hybrid refractive/harmonic diffractive optical system for far-infrared multi-band (EI CONFERENCE)
会议论文
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
Liu Y.
;
Sun Q.
;
Lu Z.
;
Yue J.
;
Zhang H.
;
Zhu R.
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提交时间:2013/03/25
In order to get enough information about the target
avoid big chromatic aberration as a result of wide spectrum and the complexity of optical system and adapt different special environment temperature
a hybrid refractive/harmonic diffractive optical system in far-infrared multi-band is described in the paper. This diffractive optical system has been designed an athermalized multi-band imaging system with harmonic diffractive element in 15-50m spectrum
based on larger 1dispersion capability and particular thermal dispersive power of harmonic diffractive element. Then
at the temperature range from 0C to 40C
this design can simultaneously meet with all requirements of the imaging system in five harmonic wave bands
including15.8-16.2m
18.5-20m
23-25m
30.5-33.5m and 46-50m. In each harmonic wave band
the magnification changes as a function of wavelength
which creates image registration error. To compensate this shortcoming
a zoom optical system is designed with three lenses by means of optical two- component method. The design results show that the hybrid refractive/harmonic diffractive optical system can realize athermalized and achromatic design
and the zoom optical system makes half image height at 3.53mm in every harmonic wave band and still realizes aberration compensation action. In the five harmonic wave bands
each optical transfer function approaches the diffraction limit at ambient temperature range of 0C to 40C. Finally
the system realizes the requirements of portability
mini-type and ease for fabrication. 2009 SPIE.
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