BS 4301:1991

Committees responsible
Foreword
Recommendations
Section one. Introduction
1. Scope
2. References
3. Introductory notes
4. Definitions
Section two. General recommendations, methods of
presentation and definition of materials for optical
elements and systems
5. Types of drawing
6. Orientation of drawings
7. Methods of representation
8. Dimensions and tolerances
9. Materials
Section three. Optical elements: strain-birefringence
10. Definitions
11. Defect rating code
12. Use of defect rating code
Section four. Optical elements: inclusions and digs
13. Description
14. Defect rating code
15. Use of defect rating code
Section five. Optical elements: homogeneity
16. Definitions
17. Defect rating code
18. Use of defect rating code
Section six. Optical elements: form errors
19. Definitions
20. Defect rating code
21. Total form error (transmitted wave error; cumulative
     error or effective form error)
Section seven. Optical elements: centring errors
22. Definitions
23. Method of specifying centring error
24. Defect rating code
Section eight. Optical elements: surface defects
25. Definitions
26. Defect rating code
27. Use of defect rating code
28. Design and use of calibrated line-equivalent width
     standards (CLEWS) and spot-equivalent standards
     (CSES)
Section nine. Optical elements: surface texture
29. Definitions
30. Method of specifying surface texture
31. Grey surfaces
32. Polished surfaces
Section ten. Optical elements: surface treatment
33. Description
34. Markings
35. Reflective coatings
36. Anti-reflective coatings
37. Paint and other treatments
Section eleven. Optical subassemblies: joining of
optical elements
38. Identification
39. Defects in joined graticule elements
40. Other defects
41. Other joining methods
42. Centring of subassemblies
Tables
1. Summary of defect codes and symbols
2. Strain-birefringence defect rating
3. Homogeneity defect rating
4. LEW threshold and reference letter
5. Preferred maximum roughness values
6. Symbols and grades for polished surfaces
7. Symbols for coatings
Figures
1. Optical arrangement drawing
2. Field stop position
3. Pupil position
4. Physical aperture
5. Pupil marking
6. Dimensions of field stops and pupils
7. View showing test region
8. Test regions
9. View showing test field within a test region
10. Diameters and tolerances
11. Spherical and plane surfaces
12. Example of geometrical tolerancing for prismatic
     component
13. Cemented spherical surface
14. Surface form error using BS 308 symbol
15. Surface form error (non-preferred alternative)
16. Drawing presentation of form error tolerances
17. Surface tilt to mounting datum
18. Lens centring error to edged surface
19. Typical viewing arrangement for surface defects
20. Symbols for optical working
21. Example of use of surface texture symbol for grey
     surface
22. Examples of use of surface texture symbols for
     polished surfaces
23. Partially reflective coating
24. Anti-reflective coating
25. Painted surface
26. Surface tilt to mounting datum (assembly)
27. Lens centring error (assembly)