Athermal design of hybrid refractive/harmonic diffractive optical system for far-infrared multi-band

Ying Liu; Qiang Sun; Zhenwu Lu; Jinying Yue; Hu Zhang; Rui Zhu

doi:10.1117/12.831069

20 May 2009 Athermal design of hybrid refractive/harmonic diffractive optical system for far-infrared multi-band

Ying Liu, Qiang Sun, Zhenwu Lu, Jinying Yue, Hu Zhang, Rui Zhu

Proceedings Volume 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 72823Q (2009) https://doi.org/10.1117/12.831069
Event: AOMATT 2008 - 4th International Symposium on Advanced Optical Manufacturing, 2008, Chengdu, Chengdu, China

Abstract

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 15-50μm spectrum, based on larger ¹dispersion capability and particular thermal dispersive power of harmonic diffractive element. Then, at the temperature range from 0°C to 40°C, this design can simultaneously meet with all requirements of the imaging system in five harmonic wave bands, including15.8-16.2μm, 18.5-20μm, 23-25μm, 30.5-33.5μm and 46-50μm. 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 0°C to 40°C. Finally, the system realizes the requirements of portability, mini-type and ease for fabrication.

Citation Download Citation

Ying Liu, Qiang Sun, Zhenwu Lu, Jinying Yue, Hu Zhang, and Rui Zhu "Athermal design of hybrid refractive/harmonic diffractive optical system for far-infrared multi-band", Proc. SPIE 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 72823Q (20 May 2009); https://doi.org/10.1117/12.831069

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available