摘要:

Any deviation from geometrical form in close fitting theodolite axes, due to either manufacturing inaccuracies or subsequent dimensional changes in the metals composing them, produces strain in the axes which is transferred through the instrument, and, as the telescope is swung in azimuth, produces deflections of varying amount of the line of collimation. Permanent and variable changes may be produced, also, in the horizontal circle. A method of testing theodolites in the laboratory for the effect of axis strain is described in this paper, together with a method of removing its effect from the alidade and telescope axes of one make of theodolite.

ISSN:1923-4287    

DOI:10.1139/cjr36a-011

出版商:NRC Research Press    

年代:1936

数据来源: NRC