IS 6425 : 1971 Specification for Dioptometer (Lensometer)

1 Scope

1.1 This standard specifies the general and functionalrequirements of a dioptometer (lensometer).

2 References

IS 2 :1960 Rules for rounding offnumerical values

IS 988 : 1959General requirements for optical components

IS 1286 : 1967 Pictorial markings for handling ofgoods in general

IS 1399 : 1959Glossary of terms used in optical technology

IS 2352 : 1963Procedure for basic climatic and durability tests foroptical instruments

IS 2754 : 1964General requirements for optical instruments