大相对口径长焦距折射式光学系统设计

发布时间：2018-01-03 19:27

本文关键词：大相对口径长焦距折射式光学系统设计　出处：《红外与激光工程》2014年09期 　论文类型：期刊论文

【摘要】：分析了大相对孔径、长焦距折射式光学系统的像差特点,针对一款口径300mm,焦距540mm,波段范围500~850 nm,视场角2°的折射式成像物镜进行了设计。首先根据系统的像差特点,针对二级光谱,选择了Petzval型作为初始结构,并进行了复杂化,形成大空气间隔的三组元形式,利于像差的校正和后组元件尺寸的减小;而后针对使用波段对玻璃材料的部分色散P和阿贝数V值进行了修正,并绘制了P-V图,从中选择了具有一定二级光谱校正能力并性能优良的玻璃材料。最终系统的二级光谱达到了0.06 mm,表明具有较好的复消色差性能。设计结果系统在相机Nyquist频率(39 lp/mm)处各视场MTF大于0.8,80%能量集中在直径为8μm的圆内,小于一个象元尺寸,最大畸变小于0.1%,各项指标均满足设计要求。
[Abstract]:Analysis of the large relative aperture, the aberration characteristics of long focal length lens system, aiming at a focal length of 540mm, diameter 300mm, the wavelength range of 500~850 nm, a view angle of 2 degrees of refractive lens are designed. According to the aberration characteristics of the system, according to the two spectra, Petzval was selected as the initial structure and type. The complex, three element form large air gap, to reduce the aberration correction and components size; then use band glass materials for partial dispersion P and Abbe number V value was corrected, and the P-V graph, choose from the two level has certain spectral correction capability and the glass material with good performance. The final system of two order spectrum at 0.06 mm, showed that apochromatism has better performance. The design results of system frequency in Nyquist camera (39 lp/mm) at the field of MTF is greater than 0.8,80% energy concentration In a circle with a diameter of 8 mu m, it is less than one image element size and the maximum distortion is less than 0.1%. All the indexes meet the design requirements.

【作者单位】：中国科学院长春光学精密机械与物理研究所;
【基金】：中国科学院第三期创新工程资助项目
【分类号】：TH74
【正文快照】： 0引言在许多应用领域中,为了获得高的分辨率和靶面照度,光学成像系统要求具有大的相对孔径和长的焦距,另外由于CCD探测器件的光谱响应范围宽,因此,还要求光学系统同时具有宽的光谱范围,这些要求提高了光学设计的难度。在光学系统结构形式选择上,由于反射系统元件口径可达米级

【参考文献】