Optical Design and Engineering

Design of a panoramic long-wave infrared athermal system

[+] Author Affiliations
Yuan Yao, Anbing Geng, Haitao Wang, Jie Guo, Tao Xiong

Huazhong Institute of Electro-Optics, Wuhan National Laboratory for Optoelectronics, No. 717 Jiangxia Road, Wuhan 430223, China

Jian Bai, Yujie Luo, Zhi Huang, Xiyun Hou

Zhejiang University, State Key Laboratory of Modern Optical Instrumentation, No. 38 Zheda Road, Hangzhou 310027, China

Opt. Eng. 55(12), 125103 (Dec 20, 2016). doi:10.1117/1.OE.55.12.125103
History: Received August 9, 2016; Accepted November 18, 2016
Text Size: A A A

Abstract.  A panoramic long-wave infrared athermal system is introduced in this paper. The proposed system includes a panoramic annular lens (PAL) block providing a stereo field of view of (30 deg – 100 deg) ×360deg without the need to move its components. Moreover, to ensure the imaging quality at different temperatures, a refractive/diffractive hybrid lens is introduced to achieve optical passive athermalization. The system operates in a spectral band between 8 and 12  μm, with a total length of 175 mm and a focal length of 3.4 mm. To get a bright and clear image, the aperture of the system was set to f/1.15. The introduction of aspherical surface and even-order diffractive surface not only eliminates the differential thermal but also makes the structure simple and lightweight and improves the image quality. The results show that the modulation transfer function below 20  lp/mm of the system is above 0.2 at each temperature ranging from 20°C to +60°C, which is close to the diffraction limit. The system is suitable to be applied in an uncooled infrared focal plane array detector and will serve as a static alert system. It has a number of pixels of 640×480, and the pixel size is 25  μm.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Yuan Yao ; Anbing Geng ; Jian Bai ; Haitao Wang ; Jie Guo, et al.
"Design of a panoramic long-wave infrared athermal system", Opt. Eng. 55(12), 125103 (Dec 20, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.125103


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.