论文部分内容阅读
从文献报道可知,美国的大光栅刻划机有威尔逊天文台的两台,麻省理工学院的三台,纽约州立大学正在研制中的一台。现将我赴美短期考察,了解到这6台刻划机的情况介绍如下。威尔逊天文台的两台刻划机,放在加利福尼亚州帕萨迪纳市内威尔逊天文台办公楼的地下恒温室内。大的一台叫 A 机,可刻光栅宽到610毫米,每毫米刻线300到900条。纯机械结构,工作台和刻桥均用双 V 形滑动导轨,丝杠长约800毫米,直径约70毫米,螺距2毫米,蜗轮1200齿。驱动部分有两套曲
It has been reported in the literature that the United States has two grating gratings, one at the Wilson Observatory, three at the Massachusetts Institute of Technology, and one at the State University of New York. Now I went to the United States for a short visit, I learned that the situation of these six scribing machines is as follows. Two sculpting machines at the Wilson Observatory are housed in the underground thermostat of the Wilson Observatory’s office building in Pasadena, California. A large machine called A, carved grating width to 610 mm, engraved 300 to 900 per millimeter. Pure mechanical structure, table and carved bridge are double V-shaped sliding rail, screw length of about 800 mm, diameter of about 70 mm, pitch 2 mm, 1200 gear worm. Drive part has two sets of music