光点の光電観測の一方法とその測地学への応用について
II. E.T.D.の電子装置について(註1)
1957 年 4 巻 1 号 p. 6-14
詳細
1957 年 4 巻 1 号 p. 6-14
A fine knife edge can divide a small light spot into two parts with negligible loss of light. If the difference between the intensities of the lights reflected on both sides of the knife edge can be detected, the position of the spot relative to the knife edge or the time of passage of the spot over the edge can be determined.
