Precision Rods & Semi-Rods

Ideal for shorter focal length lenses are the use of precision polished rods, which can be cut down to form plano-convex sections (semi-rods). BK-7 rod blanks are kept in stock, per the table below, but other glass types and dimensions are available.
R
Max. Length
3.1-6.0 50
6.0-10.0 75
10-14.0 100

Low cost conderser quality
rod lenses also available
 

Standard Tolerances
R +/-0.025mm
T +/-0.10mm
 

Surface Figure
Length
 1/4-wave per
Width
 1/2-wave
Surface quality
 60/40