Chinese English

An auxiliary device to provide measurement of very small angles or dimensions, by an instrument such as a TELESCOPE. See MICROMETER: FILAR, MICROME­TER: TRANSIT.

通过诸如望远镜之类的仪器，提供微小角度或尺寸测量的辅助设备。参见filar micrometer（游丝测微器）、transit micrometer（子午仪测微器）。

A device attached to a TELESCOPE or microscope, consisting of a wire thread (filament) connected with a screw in such manner that as the screw is turned, the wire moves through a continuous succession of parallel positions, all in the FOCAL PLANE of the instrument. Any small angle may be measu­red by noting the number of turns and fractions of a turn of the screw which are made in moving the wire from one bisection to another, and multiply­ing this by the value of one turn. See MICROMETER: OCULAR, MICRO­METER MICRO­SCOPE, and MICROMETER COMB.

一种附属于望远镜或者显微镜的装置，由一个游丝连接一个螺丝组成。当螺丝在仪器焦平面内转动时，游丝在焦平面内移动通过一系列的平行位置。任何小的角度都可由螺丝转动的圈数乘以每一圈的值计算得到。见目镜测微尺，测微计显微镜和测微器刻度尺。

A form of registering MICROMETER with its movable wire placed in the FOCAL PLANE of an astronomic TRANSIT and at right angles to the direction of motion of the IMAGE of a STAR which is observed at or near CULMINATION. The transit micrometer is also termed an impersonal micrometer, because it almost completely eliminates the effect of the PERSONAL EQUATION on time observations made with it.

一种可动游丝置于子午仪焦面内的记录型测微器，当恒星中天或接近中天时，它的方向与被测星的镜像运动方向垂直，子午仪测微器亦称超人差测微器，因为用它观测时差不多完全消除了人差的影响。

A notched SCALE placed at right angles to the movable wire of a MICROMETER and so designed that one turn of the MICROME­TER SCREW will move the micrometer wire across one notch of the comb; the central notch of the comb in conjunction with the zero of the microme­ter head furnishes a fiducial point from which all micrometer readings are reckoned. The comb is used for keeping count of whole turns of the MICRO­METER SCREW, parts of turns being read on the gradua­ted micrometer head.

一种与测微器动丝成直角放置的刻度尺，测微螺旋转动一周，测微器动丝将移过主尺一格。主尺中央刻线与测微头的零点相接为计算测微器读数的基准点。此主尺用于记录测微器螺旋转动的整周数，周小数可在标有刻度的测微头上读取。