Ultra-Precision Method of Joining Optical Lenses Using a Shrink Fitter
Ultra-Precision Method of Joining Optical Lenses Using a Shrink Fitter
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使用热缩钳连接光学镜片的超精密方法
DOI：
10.2493/jjspe.67.1615
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发表时间：
2001
影响因子：
--
通讯作者：
K. Shirai
中科院分区：
文献类型：
--
作者：
I. Nitta;A. Kanno;Nobuki Karita;Kimio Komata;K. Shirai
为了生产具有宽视野和高分辨率的激光扫描仪，研究了一种使用收缩过滤器将光学透镜连接到电池中的超精密方法。在现有的方法中，当环境温度变化时，由于透镜与电池之间的热膨胀系数差异很大，电池中透镜的光轴不重合。因此，激光光斑不能在成像平面上收敛到设计尺寸。在透镜和电池之间插入一个热膨胀系数高于透镜和电池的收缩过滤器。在任何温度下，透镜的定位精度都不会改变，因为收缩滤镜在径向上充分膨胀或收缩，以补偿干涉的变化。结果，用这种新方法组装的透镜单元可以使激光束在一个宽的扫描宽度上汇聚。本文对收缩过滤机进行了理论和实验研究。
An ultra-precision method of joining optical lenses in the cell has been developed by using a shrink fitter, in order to produce a laser scanner having a wide field of vision and high resolution. In a current method, optical axes of the lenses in the cell do not coincide with each other, when environmental temperature changes, because of great difference in thermal expansion coefficients between the lenses and the cell. Therefore, the laser spot cannot be converged to a designed size on an image plane. A shrink fitter, which has a higher thermal expansion coefficient than the lenses and the cell do, was inserted between them. The positioning accuracy of the lenses in the cell did not change at any temperature since the shrink fitter sufficiently expanded or contracted in the radial direction to compensate the change in interference. As a result, the lens unit assembled by the new method worked out to converge the laser beam over a wide scanning width. In this paper, we examined the shrink fitter theoretically and experimentally.