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5 terms
Photonics Dictionary: R
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power meter x
R x
radiant emittance
Radiant power emitted into a full sphere (4p steradians) by a unit area of a source; expressed in watts per square meter.
Rayleigh criterion of resolving power
When a lens system with a circular aperture is free of aberrations, the image of a point object will appear as a disc of finite size surrounded by concentric rings. When two points are separated such...
reading glass
A low-power magnifier that usually has a large diameter.
resolving power chart
->
resolution target
A chart on paper or glass containing a series of sets of lines at progressively smaller spacing and used to ascertain the limiting number of lines per millimeter that an optical system is capable of...
roughening laser
A roughening laser is a laser-based surface modification technique aimed at altering the surface texture of a material to achieve specific properties such as enhanced adhesion, light diffusion, or...
Photonics Dictionary
R
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