Purpose

FOV splicing optical remote sensing instruments have a strict requirement for the focal length consistency of the lens. In conventional optical-mechanical structure design, each optical element is equally distributed with high accuracy and everyone must have a high machining and assembly accuracy. For optical remote sensors with a large number of optical elements, this design brings great difficulties to lens manufacture and alignment.

Design/methodology/approach

Taking the relay lens in an optical remote sensing instrument with the field of view splicing as an example, errors of the system are redistributed to optical elements. Two optical elements, which have the greatest influence on modulation transfer function (MTF) of the system are mounted with high accuracy centering and the other elements are fixed by gland ring with common machining accuracy. The reduction ratio consistency difference among lenses is compensated by adjusting the optical spacing between the two elements.

Findings

Based on optical system simulation analysis, the optimized structure can compensate for the difference of reduction ratio among lens by grinding the washer thickness in the range of ±0.37 mm. The test data for the image quality of the lens show that the MTF value declined 0.043 within ±0.4 mm of space change between two barrels. The results indicate that the reduction ratio can be corrected by adjusting the washer thickness and the image quality will not obviously decline.

Originality/value

This paper confirms that this work is original and has not been published elsewhere nor is it currently under consideration for publication elsewhere. In this paper, the optimum structural design of the reduction relay lens for the field of view stitching applications is reported. The method of adjusting washer thickness is applied to compensate for the reduction ratio consistency difference of lenses. The optimized structure also greatly reduces the difficulty of lenses manufacture, alignment and improves the efficiency of assembly.

中文翻译：

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用于视场拼接应用的变倍中继透镜的误差分析和优化设计

目的

FOV拼接光学遥感仪器对镜头的焦距一致性有严格的要求。在常规的光学机械结构设计中，每个光学元件均以高精度均匀分布，并且每个人都必须具有很高的加工和组装精度。对于具有大量光学元件的光学遥感器，此设计给镜头制造和对准带来很大困难。

设计/方法/方法

以视场拼接的光学遥感仪器中的中继透镜为例，系统的误差被重新分配给光学元件。对系统的调制传递函数（MTF）影响最大的两个光学元件以高精度对中安装，而其他元件通过压盖环固定，具有常见的加工精度。通过调节两个元件之间的光学间距，可以补偿透镜之间的缩小率一致性差异。

发现

根据光学系统仿真分析，优化的结构可以通过在±0.37 mm范围内研磨垫圈厚度来补偿透镜之间的缩小比差异。镜头图像质量的测试数据显示，在两个镜筒之间的距离变化的±0.4毫米内，MTF值下降了0.043。结果表明，可以通过调整垫圈的厚度来校正缩小率，并且图像质量不会明显下降。

创意/价值

本文确认该作品是原创作品，尚未在其他地方出版，也未考虑在其他地方出版。在本文中，报告了用于视场缝合应用的变倍中继透镜的最佳结构设计。采用调整垫圈厚度的方法来补偿镜片的缩小率一致性差异。优化的结构还大大降低了镜片制造，对准的难度，并提高了组装效率。