BS 7522-1:1992
Superseded
View Superseded by
Low vision aids Specification for hand and stand magnifiers, including magnifiers with an integral source of illumination
Hardcopy
English
02-28-1992
11-15-2000
Committees responsible
Foreword
Specification
1. Scope
2. Definitions
3. Classification
4. Testing requirements
5. Optical characteristics
6. Mechanical characteristics
7. Electrical characteristics
8. Ignitability resistance
9. Marking, packaging and instructions for use
Appendices
A. Derivation of trade magnification
B. Recommendations regarding subjective
characteristics of hand and stand magnifiers
C. Determination of equivalent power
D. Determination of distortion
E. Determination of diffusion
F. Determination of transmittance
G. Impact resistance test
H. Determination of ignitability (heated rod test)
Table
1. Permissible levels of distortion
Figures
1. Derivation of trade magnification
2. Recommended system for visually inspecting for
defects
3. Distortion assessment charts
4. Arrangement for the determination of distortion
5. Diffusion angles
6. Arrangement of apparatus for measurement of
diffusion
Specifies requirements, both optical and mechanical, for hand-held and stand-mounted magnifying appliances for use as near vision aids. Includes simple and compound magnifiers.
| Committee |
CH/172
|
| DevelopmentNote |
Supersedes BS 5043(1973) and 91/50790 DC (05/2002)
|
| DocumentType |
Standard
|
| Pages |
0
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| BS 7522-2:1993 | Low vision aids Specification for spectacle magnifiers and similar devices |
| BS 7263-1:1990 | Precast concrete flags, kerbs, channels, edgings and quadrants Specification |
| BS 5724-1(1989) : 1989 AMD 6715 | MEDICAL ELECTRICAL EQUIPMENT - GENERAL REQUIREMENTS FOR SAFETY |
| BS 3521-1:1991 | Terms relating to ophthalmic lenses and spectacle frames Glossary of terms relating to ophthalmic lenses |
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