Acta Optica Sinica, Volume. 33, Issue 5, 511003(2013)
Stray Light Analysis and Suppression of Panoramic Annular Lens
When there is a highlight source in the field of a panoramic annular lens (PAL), the image will be covered by stray light like mist, so it is important to suppress stray light in a PAL system. The main sources of stray light in PAL are analyzed. As to the stray light caused by incomplete transmission of refractive surfaces, a suppression method is proposed, based on which a new PAL system is designed. In order to verify the feasibility of this method, a comparison of stray light performance is conducted between an ordinary PAL system and the new PAL system. The result indicates that in half field angle of 50°~85°, the stray light caused by incomplete transmission of refractive surfaces is reduced by 85% in the new PAL system, while the stray light doesn′t increase in other fields of view.
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Lu Tianxiong, Bai Jian, Huang Zhi, Wang Kaiwei. Stray Light Analysis and Suppression of Panoramic Annular Lens[J]. Acta Optica Sinica, 2013, 33(5): 511003
Category: Imaging Systems
Received: Dec. 3, 2012
Accepted: --
Published Online: May. 7, 2013
The Author Email: Tianxiong Lu (ltxgui@126.com)