Optics and optical instruments. Test lenses for calibration of focimeters - Test lenses for focimeters used for measuring spectacle lenses Ingestion-build-266356 The use of cork underlays

The use of cork underlays should follow the instructions of the manufacturer

in samples of soil and ground water for civil engineering purposes

Electrical bonding straps assist in preventing such interferences for stable operability of electrical systems

Contents of DD CEN/TS 45545-6:

Optics and optical instruments. Test lenses for calibration of focimeters - Test lenses for focimeters used for measuring spectacle lenses Ingestion-build-266356 The use of cork underlays1 Scope This part of ISO 9342 specifies requirements for test lenses for the calibration of focimeters that are used for the measurement of spectacle form lenses. NOTE It is accepted that other test lenses can also be used with powers within the given range, manufactured to the same standard of accuracy and form, but different back vertex powers. However, only lenses with integer nominal powers, as described in Annex A, can be used for the calibration