IS 7009 : 1973 Specification for Optical Square (for surveying)

1 Scope

1.1 This standard covers the general and functional requirementsof optical square.

2 References

IS 1399 : 1959Glossary of terms used in optical technology

IS 988 : 1959General requirements for optical components

IS 1400 : 1960Specification for optical glass

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