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settings. With regards to a telescope, the term refers to the fact that the optical axis of each optical component should be centered and parallel, so that collimated light emerges from the eyepiece. Most amateur reflector telescopes need to be re-collimated every few years to maintain optimum
219:) arrives at Earth precisely collimated, because stars are so far away they present no detectable angular size. However, due to refraction and turbulence in the Earth's atmosphere, starlight arrives slightly uncollimated at the ground with an
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which constrain the light to a path perpendicular to the surfaces of the mirrors. In practice, gas lasers can use concave mirrors, flat mirrors, or a combination of both. The
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speeds) around a circular track. When the electrons are at relativistic speeds, the resulting radiation is highly collimated, a result which does not occur at lower speeds.
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of binoculars is a 3-axis collimation, meaning both optical axis that provide stereoscopic vision are aligned parallel with the axis of the hinge used to select various
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will bring parallel rays to a focus at a single point. Conversely, a point source at the focus of a parabolic mirror will produce a beam of collimated light creating a
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are collimated to reduce the volume of the patient's tissue that is irradiated, and to remove stray photons that reduce the quality of the x-ray image ("film fog"). In
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performance. This can be done by simple visual methods such as looking down the optical assembly with no eyepiece to make sure the components are lined up, by using a
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complex in the world. An additional method enabling this same forward collimation effect, less well studied, may deploy strategic nuclear polarization (
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divergence to diverge or converge from parallelism. Decollimation may be deliberate for systems reasons, or may be caused by many factors, such as
283:. It also refers to the process of adjusting an optical instrument so that all its elements are on that designed axis (in line and parallel). The
116:, etc.) may be used to absorb or block peripheral particles from a desired forward direction, especially a sequence of such absorbing
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are easier to make than parabolic mirrors and they are often used to produce approximately collimated light. Many types of
93:, a gamma ray collimator is used in front of a detector to allow only photons perpendicular to the surface to be detected.
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emit less-collimated light due to their short cavity, and therefore higher collimation requires a collimating lens.
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223:. Direct rays of light from the Sun arrive at the Earth uncollimated by one-half degree, this being the
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263:. Since the source needs to be small, such an optical system cannot produce much optical power.
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is very well collimated. It is produced by bending relativistic electrons (i.e. those moving at
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of nuclei) if the requisite reactions are designed into any given experimental applications.
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Light can be approximately collimated by a number of processes, for instance by means of a
307:"Decollimation" is any mechanism or process which causes a beam with the minimum possible
279:"Collimation" refers to all the optical elements in an instrument being on their designed
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120:. This method of particle collimation is routinely deployed and is ubiquitous in every
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light from gas or crystal lasers is highly collimated because it is formed in an
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Pfister, J. & Kneedler, J.A. (s.d.). A guide to lasers in the OR.
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70:. Thus, as the distance from a point source increases, the spherical
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Other forms of electromagnetic radiation can also be collimated. In
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Mobilio, Settimio; Boscherini, Federico; Meneghini, Carlo (2014).
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can also produce collimated light from point-like sources.
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Synchrotron
Radiation: Basics, Methods, and Applications
509:. India: Pearson Education India. n.d. pp. 3–9.
66:. Perfectly collimated light is sometimes said to be
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of high-quality laser beams is commonly less than 1
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In the lower picture, the light has been collimated.
47:is an archetypical example. A perfectly collimated
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221:apparent angular diameter of about 0.4 arcseconds
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55:, would not disperse with distance. However,
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251:An example of an optical collimating lens.
300:. Collimation can also be tested using a
227:of the Sun as seen from Earth. During a
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59:prevents the creation of any such beam.
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16:Light all pointing in the same direction
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144:, which originated in a misreading of
561:Springer Science & Business Media
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390:"Introduction to Laser Technology".
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136:The word "collimate" comes from the
555:Winick, Herman; Doniach, S (2012).
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419:"Collimators for Nuclear Medicine"
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148:, "to direct in a straight line".
78:, which are perfectly collimated.
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399:. Melles Griot. n.d. p. 36.6
366:Cross-cockpit collimated display
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507:Engineering Physics 1: For WBUT
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315:inhomogeneities, occlusions,
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534:. MacMillan. p. 149.
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532:Elementary Modern Physics
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37:electromagnetic radiation
588:. Springer. p. 31.
106:collimated particle beam
631:Observational astronomy
302:shearing interferometer
289:interpupillary distance
100:may also be applied to
452:"Properties of Lasers"
285:unconditional aligning
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530:Tipler, Paul (1992).
371:Schlieren photography
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168:between two parallel
126:magnetic polarization
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393:Melles Griot Catalog
122:particle accelerator
479:Engineering Physics
68:focused at infinity
438:A Latin Dictionary
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243:Lenses and mirrors
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421:. Nuclear Fields.
294:Cheshire eyepiece
265:Spherical mirrors
197:Synchrotron light
192:Synchrotron light
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325:diffraction
233:small point
178:milliradian
118:collimators
76:plane waves
57:diffraction
620:Categories
377:References
333:refraction
329:reflection
321:deflection
317:scattering
261:collimator
255:A perfect
174:divergence
146:collineare
98:collimated
72:wavefronts
64:collimator
53:divergence
51:, with no
49:light beam
45:laser beam
434:"collimo"
403:25 August
142:collimare
132:Etymology
96:The term
83:radiology
35:or other
462:5 August
355:See also
170:mirrors
152:Sources
626:Optics
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458:. 2015
331:, and
269:lenses
182:arcmin
157:Lasers
87:X-rays
397:(PDF)
345:sonar
341:radar
337:radio
213:stars
180:(3.4
162:Laser
140:verb
138:Latin
33:light
590:ISBN
565:ISBN
536:ISBN
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464:2015
405:2018
110:lead
104:– a
41:rays
309:ray
217:Sun
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