collimation

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col·li·mate

 (kŏl′ə-māt′)
tr.v. col·li·mat·ed, col·li·mat·ing, col·li·mates
1. To make parallel; line up.
2. To adjust the line of sight of (an optical device).

[New Latin collīmāre, collīmāt-, alteration of Latin collīneāre, to aim : com-, intensive pref.; see com- + līneāre, to make straight (from līnea, line; see line1).]

col′li·ma′tion n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.collimation - the accurate adjustment of the line of sight of a telescope
readjustment, adjustment, registration - the act of adjusting something to match a standard
References in periodicals archive ?
The American Dental Association (ADA) recommended the use of a beam alignment device and rectangular collimation when exposing intraoral radiographs.
Its recessed focal spot creates a 12" source- to-skin distance with round or rectangular collimation for sharper and more detail rich radiographs.
Although successful in reducing dose, studies have shown that rectangular collimation has not been well adopted by the majority of dental practitioners and its use results in more collimator cut errors.
Results from the subjective comparison indicated that E-speed film with rectangular collimation ranked highest for film resolution, overall appearance, and choice for caries diagnosis, while E-speed film with circular collimation ranked lowest.