Polygonal mirror
Technical characteristics
|
Parameter |
Allowed values |
|
Overall size (diameter of a circumcircle), mm: |
20 to 180 |
|
Quantity of reflecting faces |
4,6,8,10,12,24,32,36 etc. - at the customer's request |
|
Angle between reflecting faces tolerance, arcsec. |
+/- 1 |
|
Reflection, %: |
90.0 – 99.5 |
|
Surface flatness, λ (λ=632.8 nm) |
0.1 - 0.2 |
|
Dimensional tolerance, mm |
≥ ± 0.05 |
|
Symmetry of the faces relative to the center of reference hole |
≥ 0.01 |
|
Surface quality acc. to ISO10110-7 |
5/3 х 0.10 |
|
Roughness acc. to GOST 11141-84 |
PII – PV |
Mirrors can be made of fine-annealing colourless optical glass N-BK7, glassceramics (Zerodur) CO115M and fused silica. Types of mirror coatings: metal (Al + protection, Cu + protection, Ag + protection), metal-dielectric, dielectric.
