Optics & optical coatings
Guide | Technical Referance
Optical Formula
Snell’s law
Reflectance (Normal incidence) R0
Critical angle θR ＝ θ2
Reflectance (P polarization) RP
Brewster angle θB ＝ θ1
Reflectance (S polarization) RS
Translation of beam for Optical Parallel D
Deviation angle of beam by wedge plate δ
Optical Density OD
Lens formula
Focal length of Lens combinations
Focal length of a lens
Focal length of thick lens 
Focal length of biconvex lens 
Focal length of glass sphere 
Focal length of plano convex lens 
Magnification of Beam Expander B
Focal length of Concave Mirrors
Formula of concentrated beam
Beam waist 1/e2 
Resolution of light microscope 