fundamental paraxial equation

paraxial equation, fundamental

Equation based on gaussian theory and dealing with refraction at a spherical surface:

where n and n′ are the refractive indices of the media on each side of the spherical surface, r is the radius of curvature of the surface and l and l′ the distances of the object and the image from the surface, respectively. n/l and n′ /l′ are the vergences (or reduced vergences) of the incident and refracted light rays respectively. L′ − L corresponds to the change produced by the surface in the vergence of the light and is called the focal power (or vergence power, or refractive power) F of the surface. ThusL′ − L = FFocal power is usually expressed in dioptres and can be either positive or negative.At a reflecting surface or a mirror the equation becomesL′ − L = 2/rwhere r is the radius of curvature of the surface or mirror. Syn. general refraction formula. See image distance; object distance; sign convention; gaussian theory; vergence.

单词	fundamental paraxial equation
释义	fundamental paraxial equation paraxial equation, fundamental Equation based on gaussian theory and dealing with refraction at a spherical surface:where n and n′ are the refractive indices of the media on each side of the spherical surface, r is the radius of curvature of the surface and l and l′ the distances of the object and the image from the surface, respectively. n/l and n′ /l′ are the vergences (or reduced vergences) of the incident and refracted light rays respectively. L′ − L corresponds to the change produced by the surface in the vergence of the light and is called the focal power (or vergence power, or refractive power) F of the surface. ThusL′ − L = FFocal power is usually expressed in dioptres and can be either positive or negative.At a reflecting surface or a mirror the equation becomesL′ − L = 2/rwhere r is the radius of curvature of the surface or mirror. Syn. general refraction formula. See image distance; object distance; sign convention; gaussian theory; vergence.
随便看	all-american canal all american drug all american five all-american football foundation all american football league all-american girls professional baseball league all american industries company all-american junior golf tour all american karate federation all american madden leagues all american marching band all american operation all american pit bull association all-american professional basketball league all american racers all-american rejects ashk'nazim ashknazim ashkun ashk, upendra nath ashl ashland ashland area labor council ashland bed and breakfast network ashland bus system