Nikon LS-3500 - LS-3510 - Manual (Page 83)

Glossary 8-11
Software Reference for Scanners
refractive index the factor by which a material, such as glass or
water, causes light wave/particles to change velocity.
This change in velocity is a change in direction
rather than speed since the speed of light is constant.
The result is that light waves change direction when
they pass through a boundary from one material,
such as air, to another, such as glass or water. This
change can be viewed directly, as when a
magnifying lens bends light, or when water
magnifies the part of an object which is submerged.
The change in angle can be calculated from this
“index of refraction”. Certain materials having a
higher density, will bend light more than others.
Different types of glass can possess larger or smaller
indices of refraction.
registration the accurate placement or line-up of discrete image
elements, in superimposition such as in multiple pass
scanning or four-color printing plate registration.
This term is also used to refer to the downloading of
commands to the LS-3510AF memory.
resolution the fine-line definition or resolving power of an
imaging system. A measure of optical performance.
Also refers to the number of dots or pixels used to
define an image. The more dots per unit of measure,
the higher the resolution, but not necessarily the
definition.
reversal films film emulsions that have been designed to be
exposed and developed as a negative, and then
reversed by chemical or light-induced fogging, to
produce a positive image from the unprocessed
portions of the negative. The negative image is then