Line of collimation

the axial line of the telescope of an astronomical or geodetic instrument, or the line which passes through the optical center of the object glass and the intersection of the cross wires at its focus.

line of collimation

[′līn əv ‚käl·ə′mā·shən] (optics) In a surveying telescope, the imaginary line through the optical center of the object glass and the cross-hair intersection in the diaphragm.

line of sight, line of collimation

The line extending from an instrument along which distant objects are seen, when viewed with the telescope or other sighting device. Also see sight line.

ThesaurusSeeline of sight

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