You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
7 November 2018Design of a mid-wavelength infrared optical system based on high frame rate measuring
In order to effectively improve the frame of mid-wavelength infrared measuring system, based on a 320×256 cooled staring focal plane array(FPA) detector, pixel size 30μm×30μm, a special optical system combined with time-sharing exposure technology was designed. In this paper, the working wavelength is 3μm~5μm, the temperature range is -30°C~+40°C, this system can realize 200mm focal length, the F-number is 4 and the full field of view is 3.44°. A re-imaging refractive system was adopted in this designed optical system consists of main optics and projection components. First of all, the working principle of the measuring system was introduced in detail. Secondly, on the basis of variety of the distance and temperature, a focusing lens was presented in this system to adjust to produce a clear image. Last but not the least, to improve image quality and environment adaptability, the analysis of temperature change and narcissus effect was described particularly. The design results prove that at the spatial frequency of 17 lp/mm, the MTF of the optical system is greater than 0.58(the axis MTF of the optical is greater than 0.65), the system can offer a high resolution and excellent images. The measuring system implements 400fps measuring system consisting of four 100fps detectors.
The alert did not successfully save. Please try again later.
Jing Duan, Kai Liu, Qiusha Shan, Peipei Yan, Kai Jiang, "Design of a mid-wavelength infrared optical system based on high frame rate measuring," Proc. SPIE 10832, Fifth Conference on Frontiers in Optical Imaging Technology and Applications, 1083213 (7 November 2018); https://doi.org/10.1117/12.2508315