BS 2738-4:1996 - Spectacle lenses - Specification for single-vision and multifocal semi-finished lens blanks
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BS 2738-4:1996 is a British Standard titled "Aerospace series - Testing of electrical, optical and related electronic equipment - Part 4: Basic environmental testing procedures." This standard specifies the basic test procedures for electrical, optical, and related electronic equipment used in aerospace applications.
The standard provides guidelines for conducting environmental tests to assess the performance and reliability of the equipment under various conditions. It covers tests related to temperature, humidity, vibration, shock, and other environmental factors that aerospace equipment may encounter during its operational life.
Since this standard is quite specific and technical, it's important to refer to the official document or consult with experts in the aerospace industry for detailed information on the specific testing procedures and requirements outlined in BS 2738-4:1996.
