Line of collimation
Collimation Col`li*ma"tion, n. [Cf. F. collimation, fr. a false reading (collimare) for L. collineare to direct in a straight line; col- + linea line. Cf. {Collineation}.] The act of collimating; the adjustment of the line of the sights, as the axial line of the telescope of an instrument, into its proper position relative to the other parts of the instrument. [1913 Webster]

{Error of collimation}, the deviation of the line collimation of an astronomical instrument from the position it ought to have with respect to the axis of motion of the instrument.

{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. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Error of collimation — Collimation Col li*ma tion, n. [Cf. F. collimation, fr. a false reading (collimare) for L. collineare to direct in a straight line; col + linea line. Cf. {Collineation}.] The act of collimating; the adjustment of the line of the sights, as the… …   The Collaborative International Dictionary of English

  • Collimation — Col li*ma tion, n. [Cf. F. collimation, fr. a false reading (collimare) for L. collineare to direct in a straight line; col + linea line. Cf. {Collineation}.] The act of collimating; the adjustment of the line of the sights, as the axial line of… …   The Collaborative International Dictionary of English

  • line — I n 1. rule, bar, score, underline, underscore, hairline; mark, stroke, streak, dash, hyphen, virgule, diagonal; marking, inscription, inscript, engraving, incision; scratch, notch, slash, etch, hatching. 2. band, stripe, strip, belt, zone, layer …   A Note on the Style of the synonym finder

  • collimation — noun the accurate adjustment of the line of sight of a telescope • Derivationally related forms: ↑collimate • Hypernyms: ↑adjustment, ↑registration, ↑readjustment …   Useful english dictionary

  • collimation — noun a) the act of collimating or something collimated b) aligning lenses along line of sight to minimize aberrations See Also: collimate, collimator …   Wiktionary

  • collimation — The method, in radiology, of restricting and confining the x ray beam to a given area and, in nuclear medicine, of restricting the detection of emitted radiations from a given area of interest. [L. collineo, to direct in a straight line] * * *… …   Medical dictionary

  • Direction — I (Roget s Thesaurus) < N PARAG:Direction >N GRP: N 1 Sgm: N 1 direction direction bearing course vector Sgm: N 1 set set drift tenor Sgm: N 1 tendency tendency &c. 176 Sgm: N 1 i …   English dictionary for students

  • direction — I (New American Roget s College Thesaurus) Pointing toward Nouns 1. direction, bearing, course, set, drift, tenor, orientation, tendency; incidence; tack, aim, line of fire; collimation. See straightness. 2. point of the compass, cardinal points …   English dictionary for students

  • Lower transit — Transit Trans it, n. [L. transitus, from transire to go over: cf. F. transit. See {Transient}.] 1. The act of passing; passage through or over. [1913 Webster] In France you are now . . . in the transit from one form of government to another.… …   The Collaborative International Dictionary of English

  • Surveyor's transit — Transit Trans it, n. [L. transitus, from transire to go over: cf. F. transit. See {Transient}.] 1. The act of passing; passage through or over. [1913 Webster] In France you are now . . . in the transit from one form of government to another.… …   The Collaborative International Dictionary of English

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