Research Progress in Optical Spacing Measurement Technology

Zhonghua, 师中华 Shi; Baoxi, 杨宝喜 Yang; Zhangfan, 魏张帆 Wei; Jing, 李璟 Li; Huijie, 黄惠杰 Huang

doi:10.3788/lop52.040004

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“…光学镜头在诸多领域中都有广泛的应用，如工业检测、安防监控、国防军事等 [1][2][3][4] ，而透镜中心厚度是光学镜头的一个重要参数，其对光学镜头的焦距以及光学系统的成像质量均有较大影响。数码镜头、航空摄像镜头等均对透镜中心厚度有严格的要求 [5] 。透镜中心厚度的加工是否满足要求，需要高精度的测量设备对其进行测量。目前，透镜中心厚度测量方法可分为接触式与非接触式 [6][7] 。接触式测量一方面容易损害透镜，另一方…”

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Design of Lens Central Thickness Measuring Optical System

Yong¹,

Bang-hui²,

Xiaoxun³

et al. 2016

激光与光电子学进展

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The designed lens central thickness measuring optical system is a kind of new system based on chromatic confocal principle, which can fast and automatically measure center thickness of lens without contact of lens surfaces. In order to expand measuring range of device, multiple configuration modes are established to eliminate monochromatic aberrations within each configuration, and enlarge the D-value of image distance to increase the longitudinal chromatic aberration. In this way, the longitudinal chromatic aberration of the system can reach about 30 mm in the wavelength range from 400 nm to 1000 nm. The maximum measurable lens thickness can be more than 30 mm by using this optical system. Measurement of three different lenses whose central thicknesses are 6, 15 and 30 mm is done. The results show that the measuring accuracies for the three lenses are ±2.5, ±3.5 and ±5.0 μm.

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Section: 引言unclassified