IS 5148 : 1969 Specification for Hand Magnifiers (Circular) - 50, 75 and 100 mm

1 Scope

1.1 This standard covers the requirements of circular handmagnifiers having magnification of 2 x or 3 x and with clearaperture of 50, 75 and 100 mm, used for general purposes.

2 References

IS 2 :1960 Rules for rounding offnumerical values

IS 988 : 1959General requirements for optical components

IS 1382 : 1961Glossary of terms relating to glass industry

IS 1399 : 1959Glossary of terms used in optical technology

IS 2754 : 1964General requirements for optical instruments