BS 3062:1985
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Hardcopy , PDF
01-07-2014
English
28-02-1985
Foreword
Committees responsible
Specification
1 Scope
2 Designation
3 Category of material
4 Refractive index and constringence
5 Other properties of ophthalmic materials
6 Freedom from visible defects
7 Flammability
8 Information to be provided by the supplier
Appendices
A Method for determination of refractive index and
constringence
B Method for determination of yellowness index and
absorptivity of white materials
C Method for determination of luminous transmittance
of all ophthalmic materials and fatigue of
photochromic materials
D Method for determination of solar infra-red
transmittance
E Method for determination of internal quality
F Method for assessment of flammability
G Bibliography
Tables
1 Refractive property tolerances
2 Spectral irradiance E lambda for the infra-red
spectral range
Figure
1 Spectral transmittance of heat-absorbing filter
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.