Century Dictionary and Cyclopedia
- n. The accurate adjustment of the line of sight of a telescope. A telescope having only one motion, as a meridian instrument or a surveyors' level, is in collimation when the mean of the wires or other assumed point apparently traverses a great circle of the heavens when the telescope is rotated. The error of collimation, or the distance of the small circle actually described, when the line of sight is not accurately adjusted, from the parallel great circle, is also familiarly called the collimation. It is measured by reversing the telescope in its bearings and measuring half the angular distance between the two objects thus successively brought to the mean position of the wires. Two telescopes are said to be in collimation when their optical axes coincide.
- n. the act of collimating or something collimated
- n. aligning lenses along line of sight to minimize aberrations
GNU Webster's 1913
- n. 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.
- n. the accurate adjustment of the line of sight of a telescope
“Exposure to ionizing radiation during a medical examination can be limited by lead shielding, tube collimation and using the lowest dose necessary to obtain a diagnostic image.”
“E.g., the formation and collimation of jets is still quite unknown.”
“The old one, you may recall, has deteriorated over the years it's close to 30 years old, after all and no longer adjusts for collimation.”
“The replacement is a nice model from Astrosystems, which features four-point collimation adjustment.”
“BONNIE RUCKS, DEVRY UNIVERSITY: It is a collimation of all of the students 'learning experiences here at DeVry and their real world experience.”
“I think Jeff #4 has it right: the ‘illumination’ risk is only evident on takeoff or final approach… and even then, why bother with a laser when a high-collimation halogen light will do the job?”
“Even with the collimation provided by a parabolic sending station, my gut feeling is that the physics (scattering, signal-to-noise, etc) is very much against it working.”
“A magnetic pulse of very high power seriously interfered with plasma collimation before the shutoff could respond," stated the computer.”
“It consists of spider webs set within a graduated metallic circle, the webs movable by screws, and the whole instrument capable of rotating about the collimation axis of the telescope.”
“This post was sawed off squarely on top so that the line of collimation of an engineer's transit set on it without”
These user-created lists contain the word ‘collimation’.
Oddments culled from my "main" lists that belong in a display cabinet of their own, plus sundry other curiosities. :-)
I'm especially fond of ones written by Charles Sanders Peirce.
Looking for tweets for collimation.