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8 terms
Photonics Dictionary: C
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eyepiece x
C x
compensating eyepiece
A microscope eyepiece designed for use with apochromatic objectives. Since apochromatic objectives are undercorrected for lateral color, these eyepieces are overcorrected for that aberration.
clear eye distance
In a visual optical system, the axial distance from the last mechanical surface of the eyepiece to the exit pupil.
coherent fiber bundle
A coherent fiber bundle (CFB), also known as a coherent fiber optic bundle, is an assembly of multiple optical fibers arranged in a specific geometric pattern to maintain the spatial coherence of...
coincidence prism
A compound prism consisting of an assembly of small prisms cemented together that is used in a coincidence rangefinder to transmit the images from the two objectives to a single eyepiece for viewing.
coincidence rangefinder
An optical instrument used to determine the distance to a target being viewed. Two similar optical systems view the target via 45° mirrors at the ends of a fixed baseline. One system creates the...
comparator
1. An eyepiece or magnifier with a scale at its image plane. That scale is placed in contact with an object, permitting direct measurement of its size. 2. Also called traveling stage and traveling...
comparison microscope
Two microscopes that are coupled on a common stand, the two images being projected side by side in the field of view of a single eyepiece for comparison.
compound microscope
->
microscope
An instrument consisting essentially of a tube 160 mm long, with an objective lens at the distant end and an eyepiece at the near end. The objective forms a real aerial image of the object in the...
Photonics Dictionary
C
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