Surface imperfections of optical elements
1 Scope
This standard specifies the terms, definitions, symbols, tolerances, identification and test methods for surface imperfections of optical elements.
This standard is applicable to the transmission and reflection surfaces with surface roughness Rz≤0.1μm of optical elements processed by polishing, edging, injection molding, coating, etc., and it may also be referenced by the transmission and reflection surfaces of optical elements processed by scribing, gluing, coating, etc.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition applies.
GB/T 13323 Optical drawings
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1.1
surface imperfections
defects such as pits, stains, scratches and edge chips on the surface of optical elements. Surface imperfections other than coating layer imperfections, long scratches and edge chips are also called general surface imperfections (hereinafter referred to as general imperfections)
3.1.2
pit; pitting
tiny point-like cavities on the surface of optical elements, including open bubbles, broken points, and sand marks left after fine grinding or accurate grinding. The pits corresponding to the basic grade number of general imperfection tolerance are called coarse pits, and those with grade number smaller than the basic grade number of general imperfection tolerance are called fine pits
Foreword i
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Tolerance
5 Identification
6 Test methods
Annex A (Normative) Sub-division
Annex B (Informative) Examples of surface imperfection tolerance marking
Annex C (Informative) Test device for imperfection evaluated by measurement of obscured or affected area
Annex D (Informative) Quality control procedures for imperfection evaluated by measurement of obscured or affected area
Annex E (Normative) Inspection devices for imperfections evaluated by measurement of visibility
Annex F (Informative) Surface imperfection tolerance of glued parts or after coating
Bibliography
