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theodolite click to hear : theodolite

Sighting instrument that is used especially in astronomy, geodesy and navigation for measuring horizontal and vertical angles.
theodolite image
achat d'image achat d'image

See theodolite in : french | spanish
alidade level illumination mirror leveling head horizontal clamp leveling head locking knob leveling head level base plate leveling screw telescope optical sight adjustment for horizontal-circle image micrometer screw adjustment for vertical-circle image alidade

alidade level click to hear : alidade level

Transparent tube that contains liquid and an air bubble; it serves as a guide for positioning the alidade on the vertical axis.

illumination mirror click to hear : illumination mirror

Adjustable polished glass surface that reflects light onto the circles so that the angles can be read.

leveling head click to hear : leveling head

Platform serving as a support for the theolodite.

horizontal clamp click to hear : horizontal clamp

Knob that locks the alidade to prevent it from rotating.

leveling head locking knob click to hear : leveling head locking knob

Knob that locks the alidade to the leveling head.

leveling head level click to hear : leveling head level

Transparent tube that contains liquid and an air bubble; it serves as a guide for positioning the leveling head on the horizontal axis.

base plate click to hear : base plate

Plate to which the leveling head is attached by means of three leveling screws.

leveling screw click to hear : leveling screw

Screw that adjusts the theodolite’s leveling head level on the horizontal plane.

telescope click to hear : telescope

Optical instrument composed of several lenses; it can be adjusted in the horizontal and vertical planes and is used to observe distant objects.

optical sight click to hear : optical sight

Device with an eyepiece that precisely aims the telescope at the target whose angles are to be measured.

adjustment for horizontal-circle image click to hear : adjustment for horizontal-circle image

Knob that adjusts the sharpness of the image of the horizontal circle (graduated from 0° to 360°) in order to read the angles on the horizontal axis.

micrometer screw click to hear : micrometer screw

Knob that adjusts the micrometer to give a very precise reading of the circles’ measurements.

adjustment for vertical-circle image click to hear : adjustment for vertical-circle image

Knob that adjusts the sharpness of the image of the vertical circle (graduated from 0° to 360°) in order to read the angles on the vertical axis.

alidade click to hear : alidade

Part of the theodolite that rotates on a vertical axle to measure angles by means of the telescope.