BS 7522-2:1993
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
Low vision aids Specification for spectacle magnifiers and similar devices
Hardcopy
15-11-2000
English
15-03-1993
Important note : Users cannot be edited or removed once added to your Multi user PDF.
Committees responsible
Foreword
Specification
1. Scope
2. References
3. Definitions
4. Classification
5. Frames, mounts, head-bands and screw threads
6. Performance characteristics
7. Optical characteristics
8. Physical characteristics
9. Marking, packaging and information to be provided
by the manufacturer
Annexes
A. (informative) Recommendations regarding subjective
characteristics of spectacle magnifiers
B. (normative) Corrosion test using simulated
perspiration solution
C. (normative) Determination of equivalent power
D. (normative) Determination of distortion
E. (normative) Determination of diffusion
F. (normative) Determination of transmittance
G. (normative) Impact resistance test
H. (normative) Determination of ignitability (heated
rod test)
Tables
1. Permissible levels of distortion
Figures
A.1 Recommended system for visually inspecting for
defects
D.1 Distortion assessment charts
D.2 Arrangement for the determination of distortion
E.1 Diffusion angles
E.2 Arrangement of apparatus for measurement of
diffusion
List of references
Specifies requirements, both optical and mechanical, for 4 types of appliances.
| Committee |
CH/172
|
| DevelopmentNote |
Supersedes BS 5043(1973) and 91/58104 DC (05/2002)
|
| DocumentType |
Standard
|
| Pages |
0
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| BS 3062:1985 | Specification for ophthalmic lens materials |
| BS 3172:1987 | Specification for screw threads for spectacle frames |
| BS 7522-1:1992 | Low vision aids Specification for hand and stand magnifiers, including magnifiers with an integral source of illumination |
| BS 3521-1:1991 | Terms relating to ophthalmic lenses and spectacle frames Glossary of terms relating to ophthalmic lenses |
| BS 3162:1959 | Specification for ophthalmic trial case lenses |
| BS 6625-1:1985 | Spectacle frames. Specification for general requirements |
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.