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21 Cards in this Set
- Front
- Back
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a point of portion of spherical waves where they diverge or converge.... bundle of rays
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focus
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the function of an optical device
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collect and reshape a portion of the incident wave front
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as the wavelength of a radiant energy decreases in comparison to the physical dimensions that effect of diffraction becomes
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less significant
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in geometrical optics we neglect the
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phase
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geometrical optics treats the manipulation of wave front by means of the inter positioning of reflecting and/or recycling bodies neglecting any
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diffraction effects
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simplified version of optics
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geometrical optics ray optics
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for optics in order
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ray optics wave optics electromagnetic optic quantum optics
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optical system will have an axis n all light rays will be assumed to propagate at small angles to this
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paraxial approximation
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a refracting device to reconfigure a transmitted energy distribution
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A lens
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it is often desirable to convert diverging spherical waves into
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a beam of plane waves
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the configuration of a lens is determined by
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the required reshaping of the wavefront it is designed to perform
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how is the telescope work
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collect incoming parallel rays and bring them together to a point
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what focuses parallel rays to a point one focal length away
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A lens
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types of lenses
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biconvex, Plano-convex, convex-concave, meniscus, plano-concave, bioconcave
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special object distance where the waves in the transmitting medium are planar
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object focal length
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an object is said to be a real when
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light diverges from it
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refracting system consisting of two or more interfaces at least one of them which is curved
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simple lens
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an object is said to be virtual when
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light converges towards it
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formed of two or more simple lenses
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compound lens
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compound or simple one where the thickness of the elements play no significant role
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thin lens
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another measure of a lens size
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numerical aperture
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