Porro prism
Technical characteristics
|
Parameter |
Allowed values |
|
Size of an entrance face АхА, mm |
10 х 10 to 60 х 60 |
|
Angular tolerance, 45˚, 90˚, arcsec |
+/- 3 |
|
Pyramidal error, arcsec, max |
5 |
|
Flatness of reflective faces, λ (λ=632.8 нм) |
0.05 - 0.1λ |
|
Flatness of deflective faces, λ (λ=632.8 нм) |
0.1 - 0.2λ |
|
Wavefront deformation (single pass), λ , (λ=632.8 нм) |
13/ (0.5/0.3) |
|
Dimensional tolerance, mm |
± 0.1 |
|
Surface quality acc. to ISO10110-7 |
5/3 х 0.16 |
|
Roughness acc. to GOST 11141-84 |
P II – P V |
Prisms can be made of all types of fine-annealing colourless optical glass and fused silica.
