BS EN ISO 7944:1998
Current
The latest, up-to-date edition.
Optics and optical instruments. Reference wavelengths
Hardcopy , PDF
English
15-08-1998
Important note : Users cannot be edited or removed once added to your Multi user PDF.Covers two procedures to determine the tensile strength of fabrics coated with rubber or plastics, using the strip test and grab test methods. Applicable to test pieces in equilibrium having specified standard atmosphere for testing, and to wet test pieces. Both procedures need the use of a constant rate of extension tensile-testing machine.
| Committee |
CPW/172
|
| DevelopmentNote |
Supersedes 96/540151 DC and BS 7017(1988) (06/2005)
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This International Standard specifies two reference wavelengths to be used for the characterization of optical materials, optical systems and instruments, as well as ophthalmic lenses. It defines the associated principal refractive indices and principal dispersions, as well as the Abbe numbers with regard to these reference wavelengths and principal dispersions.
| Standards | Relationship |
| UNE-EN ISO 7944:1999 | Identical |
| NF EN ISO 7944 : 1998 | Identical |
| NS EN ISO 7944 : 1998 AC 2009 | Identical |
| UNI EN ISO 7944 : 1999 | Identical |
| EN ISO 7944:1998 | Identical |
| NBN EN ISO 7944 : 1998 COR 2009 | Identical |
| NEN EN ISO 7944 : 1998 | Identical |
| I.S. EN ISO 7944:1999 | Identical |
| ISO 7944:1998 | Identical |
| DIN EN ISO 7944:1998-07 | Identical |
| SN EN ISO 7944 : 1998 CORR 2009 | Identical |
| BS 7394-2:2007 | Complete spectacles Specification for prescription spectacles |
| 07/30082138 DC : DRAFT FEB 2007 | BS 7394-2 - COMPLETE SPECTACLES - PART 2: SPECIFICATION FOR PRESCRIPTION SPECTACLES |
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