astronomical theodolite的意思|示意

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Astronomical Theodolite: Uses and Explained

Astronomical theodolite is an instrument used for precision measurement of vertical and horizontal angles in a vertical plane. It was invented in the 16th century and its primary use is in the field of surveying and astronomy. It is a combination of a theodolite and a telescope. The telescope is mounted on a rotatable platform allowing it to measure angles in all directions. The sighting tube is used for accurately measuring angles in the vertical plane and the telescope can be swiveled to measure angles in the horizontal plane.

The primary use of astronomical theodolite is in observing stars, planets and other celestial phenomena. The optical tube of the instrument is finely aligned to accurately track the path of stars and planets. The device is used to measure the angular distance between two stars, the angular diameter of planets, and even the movements of comets. Telescopes fitted with theodolite can be used for measuring the displacement of stars over a long period of time which is useful for calculating the annual parallax of stars.

In addition to its use in astronomy, astronomical theodolite can be used for survey and mapping applications. It is used to measure distances, slopes, and elevations on the ground. The device can be used to measure the height of buildings and maps the contours of the terrain. Additionally, astronomical theodolite is used in navigation and laser range-finding applications.

Astronomical theodolite is a highly sensitive and precise instrument that requires careful and extensive calibration before use. It includes a variety of components like the tripod, optical tube, vertical circle, horizontal circle, and bubble level. The vertical circle is divided into degrees and is used for measuring the elevation angles, while horizontal circle is used for measuring the azimuth angles.

To use the astronomical theodolite, it is mounted on a level surface and the bubble level is used for ensuring that the platform is perfectly level. The required angles are measured using the upright and slanted sights of the telescope. The optical tube is rotated in the horizontal plane to observe stars and planets and accuracy is assured by double checking the results using the calibrated circles.

In conclusion, astronomical theodolite is a highly specialized instrument used for measuring angles and distances in the sky and on the ground. Its primary application is in astronomy and surveying, but it is also used in navigation and laser range-finding. The device is highly precise and requires calibration before use, and accurate results can be obtained by double checking the results with the calibrated circles.