Design of apochromatic lens with large field and high definition for machine vision

作者：Yang, Ao; Gao, Xingyu^*; Li, Mingfeng

来源：Applied Optics, 2016, 55(22): 5977-5985.

DOI：10.1364/AO.55.005977

• OPTICAL-GLASSES
• DISPERSION
• SELECTION
• OBJECTIVES
• EQUATION

Precise machine vision detection for a large object at a finite working distance (WD) requires that the lens has a high resolution for a large field of view (FOV). In this case, the effect of a secondary spectrum on image quality is not negligible. According to the detection requirements, a high resolution apochromatic objective is designed and analyzed. The initial optical structure (IOS) is combined with three segments. Next, the secondary spectrum of the IOS is corrected by replacing glasses using the dispersion vector analysis method based on the Buchdahl dispersion equation. Other aberrations are optimized by the commercial optical design software ZEMAX by properly choosing the optimization function operands. The optimized optical structure (OOS) has an f-number (F/#) of 3.08, a FOV of phi 60 mm, a WD of 240 mm, and a modulated transfer MTF) of all fields of more than 0.1 at 320 cycles/mm. The design requirements for a nonfluorite material apochromatic objective lens with a large field and high definition for machine vision detection have been achieved.

• 出版日期2016-8-1
• 单位桂林电子科技大学