See absorptance, absorption efficience
a = 1 – t
An indicator of a material’s internal absorptance. If the unit transmission of the material is t, the absorption coefficient (a) is:
a = 1 – t
Ratio of the absorbed radiant or luminous flux to the incident flux.
The point at which absorbed laser energy is sufficient to break the bonds between molecules of a material.
An optical instrument with knife-edge scanning technology that can detect and measure aberrations in an optical system.
Deviation from what is normal, right or natural. In optics, defects of a lens system that cause its image to deviate from the rules of paraxial imagery.
abaxial spherical aberration
A type of aberration in which a symmetrical light patch is formed at points that do not lie on the lens axis. When the image moves away from the center of the field, the patch increases in size, aiding in the formation of coma. Also known as abaxial spherical aberration.