Non-destructive testing. Aids to visual inspection. Selection of low-power magnifiers
1.1 This International Standard specifies the characteristics of the following types of low-power magnifiers and gives recommendations for their selection for the inspection of surfaces.
Single-element magnifiers of magnification typically up to ×4 (Type A).
Multi-element magnifiers of magnification typically up to ×10 (Type B).
Twin-system magnifiers of magnification typically up to ×15 (Type C), categorized as follows:
binocular, normally with a long working distance (Type C.1);
bi-ocular1), including those refined with stops or other attachments, for quasi-stereoscopic vision (Type C.2).
Concave-mirror magnifiers with front-surface reflectors in powers typically up to ×6 (Type D).
1.2 This International Standard is not concerned with:
watch-makers' loupes and spectacles;
single-element, spherical- or cylindrical-lens magnifiers in which either the lens or the lens-mount rests on the surface of the object to be examined (this includes magnifiers provided with any form of graduated scale for the purpose of measurement);
plastic lens sacs, liquid-filled;
magnifiers intended for the examination of internal surfaces.
| SDO | BSI: British Standards Institution |
| Document Number | ISO 3058 |
| Publication Date | May 15, 1998 |
| Language | en - English |
| Page Count | |
| Revision Level | |
| Supercedes | |
| Committee | WEE/46 |
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