eo_logo
 
Product added to cart

Knowledge Center/ Glossary/ Optical Density (OD)

Optical Density (OD)

Describes the amount of energy that can pass through an optical material. It is directly related to the transmittance of the material, which is the ability of light to propagate through a given medium. A large OD means more blocking.

See also Continuously Variable Apodizing Filter , Blocking , Neutral Density Filter (ND)

Was this content useful to you?