R67 resolution chart NBS 5 bar test
NBS 5 Resolution Chart
NBS 5 Bar Test (BS4657)
1-18 lines per mm Chrome Surface Image B270 Glass 75mm x 75mm
This consists of elements of 5 bars ranging from 1 line per mm to 18 lines per mm, with adjacent numbers indicating the number of lines per mm. Produced as a vacuum deposited chrome image on 75mm x 75mm glass.