入瞳位置前置式双通道全景环带光学系统设计

Design of two channel panoramic annular optical system with entrance pupil preposition

全景环带光学系统在机器视觉领域等领域中有广泛的应用,该类系统不断追求小型化、紧凑化,并且在保证系统结构紧凑小巧的同时实现大视场探测。针对上述需求对全景环带成像光学系统开展研究,并在分析全景环带头部单元形式的基础上设计了一款双通道全景环带光学系统。该系统由边缘视场通道以及中心视场通道组成,两个通道分别由入瞳位置前置式全景环带系统以及中心视场系统进行构建。通过合理的搭配,最终系统中心视场通道视场范围为0°~18.5°,边缘视场通道视场范围为38°~83°,在设计过程中,使用even-ogive面型对全景环带系统的特定面型进行设计,并对如何使用该面型进行了描述,最终所设计的系统的两个视场通道均可在0.486~0.656μm可见光波段内清晰成像,光学系统结构紧凑,成像质量良好,满足使用需求。

Panoramic annular optical system have been widely applied in various emerging field like robot sensing. This type system desire a large FOV detection capability while maintaining a small and compact size. According to above requirements a research on the panoramic annular optical system was made, and a two-channel panoramic annular optical system based on the analysis of the panoramic annular lens(PAL) was designed. The system is composed of a marginal FOV channel and a central FOV channel,which correspond to the panoramic annular optical system with entrance pupil preposition and central FOV system respectively. By rational combination, the central FOV of the system is 0 °-18.5°, the marginal FOV of the system is 38°-83°. In the design process, even-ogive surface was adopted to design the certain surface of the panoramic annular lens of the marginal FOV channel, also an description of how to use the even-ogive surface in the design process was made. Finally both two channels can acquire a good image on the image plane during the working wavelength 0.486-0.656 μm, the whole structure of the system is relatively compact, satisfying the demand for application.