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光学非球面加工控制系统是由主机IBM-PC与直接控制(单板机)两级组成的分布式控制系统。IBM-PC完成对非球面面形误差的分析与计算进而自动生成加工程序;单板机控制装置控制抛光机,带动抛光模按加工程序要求,在非球面表面运动。本文主要介绍数控装置的实现,系统安全,断电保护措施以及IBM-PC与单板机双机通讯等。 1.系统的组成及工作原理在光学系统中,应用非球面能够校正像差,改善像质,简化光学系统结构,减轻重量。因而在航空航天光学系统,天文观测,红外技术等诸多方面都有广泛的应用价值。但由于非球面加工与检测的困难,使其应用受到阻碍。对高精度的大型非球面,目前国内一般采用普通研磨抛光法,用刀口仪测量根据阴影图来定性判断误差,在抛光机上,由人工修正抛光模,来控制加工精度。
Optical aspheric processing control system is a distributed control system composed of mainframe IBM-PC and direct control (single-board machine) two levels. IBM-PC to complete the analysis and calculation of non-spherical surface shape error and then automatically generate processing procedures; control of single-board machine control polishing machine, driven by the polishing process requirements of the polishing process, the aspheric surface movement. This article describes the realization of numerical control devices, system security, power protection measures and IBM-PC and single-board dual-machine communications. 1. System composition and working principle In the optical system, the application of aspherical aberration can be corrected, improve image quality, simplify the optical system structure, reduce weight. Thus in the aerospace optical system, astronomical observation, infrared technology and many other aspects have a wide range of applications. However, due to the difficulty of processing and testing of aspheric surfaces, its application is hindered. For high-precision large-scale aspheric surface, the current domestic general grinding and polishing method, with a knife-edge measurement based on the shadow map to determine the qualitative error, in the polishing machine, the manual correction of the polishing die, to control the machining accuracy.