IS 12874 : 1989 Optical and Mathematical Instruments - Telescopic Alidade - Specification

1 Scope

1.1 This standard covers the requirements of telescopic alidade.

2 References

IS 988 :1959 General requirements foroptical components

IS 1399 :1959 Glossary of terms used inoptical technology

IS 1632 :1960 Bubbles

IS 2754 :1964 General requirements ofoptical instruments

IS10236Procedure for basic climatic and durability tests foroptical instruments

Part 2 :1982 Part 2 Dry heat test

Part 3 :1982 Part 3 Cold test

Part 11 :1985 Part 11 Vibration test

Part 14 :1986 Part 14 Driving rain test