Optics and optical instruments. Reference wavelengths shop-only This standard applies to test

This standard applies to test pieces taken from metallic products

where it is considered additional security or other measures may be required to protect against the risk of vandalism

malleable cast iron

angle of spray and pattern (variations of a cone shape)

International concern over damage to the environment (e

Optics and optical instruments. Reference wavelengths shop-only This standard applies to test1 Scope This International Standard specifies two reference wavelengths to be used for the characterization of optical materials, optical systems and instruments, as well as ophthalmic lenses. It defines the associated principal refractive indices and principal dispersions, as well as the Abbe numbers with regard to these reference wavelengths and principal dispersions.