Prisms
(cube, rhombic, Dove, rectangular, rectangular with "roof", rectangular trihedral (triple), polygonal, penta-prisms).
Application: the prisms are intended for use at high rocking angle to avoid large prism dimensions.
Name: K-0о
|
Material |
BK-7 quality optical glass without striae at 2 mutually perpendicular directions |
|
Dimensions |
Max. 100х100х100 mm |
|
Dimensional tolerance |
±
0.1 mm
|
|
Surface flatness |
¼ at λ= 632.8 nm |
|
Surface quality |
0.01-mm wide scratches of total length 2x over working aperture |
|
Transmission coefficient |
45±5% regardless of polarization |
|
Polarization |
S and P polarization components approved within 10% |
|
Absorption |
< 10% |
|
Transmitted beam deviation |
≤ 5 arc min |
|
Reflected beam deviation |
90о ± 5 arc min |
|
Angle of incidence |
0о±5о |
|
Antireflection coating |
wide-band, multilayer coating, R<0,5% |
|
Temperature span |
from –50оС to +90оС |
|
Cleaning |
Non-abrasive method, acetone or isopropyl alcohol on lens tissue are recommended |
|
Damage threshold |
100W/cm2 CW, 2 J/cm2 with 10 n/sec pulses |
Rhombic, Dove, rectangular, rectangular with “roof” prisms, etc.
Application: the prisms are intended for use in devices for ray path variation, change of direction of optic axis system, image reversal, ray path downsizing, etc.
|
Material |
BK-7 quality optical glass without striae at 2 mutually perpendicular directions |
|
Dimensions |
Edge length ≤
200 mm
; edge width ≤
100 mm
|
|
Dimensional tolerance |
+0/-
0.05 mm
|
|
Angle tolerance |
3 arc min or up to 5 arc sec on request |
|
Chamfer |
up to
3 mm
х 45о |
|
Surface flatness |
¼ at λ= 632.8 nm |
|
Surface quality |
0.01-mm wide scratches of total length 2x over working aperture |
Polygonal prisms
Application: The prisms are intended for use in mechanical beam scanning systems and image scanning systems.
|
Material |
BK-7 quality optical glass, glass ceramics |
|
Dimensions |
120÷300 mm |
|
Dimensional tolerance |
+0/-
0.05 mm
|
|
Number of edges |
6÷12 |
|
Angle tolerance |
± 1 arc sec |
|
Surface flatness |
1/10 at λ= 632.8 nm |
|
Surface quality |
0.006-mm wide scratches of total length 2x over working aperture |
|
Coating |
Aluminum of zero group of strength |
Penta-prisms 
Name
BP-90о penta prism
BkP-90о penta prism with roof
Application: Penta is a five sided prism. It reflects light rays through an angle of 90° by two reflections. It does not invert or revert the image. Slight movement of the prism does not affect the true right angle at which light rays are reflected. This feature makes this prism useful for range-finders. It also shortens the length of an instrument. Excellent for use in front of movie camera lens for taking shots off to the side without subject's knowledge.
|
Material |
BK-7 quality optical glass without striae at 2 mutually perpendicular directions |
|
Dimensions |
Edge length ≤
250 mm
; edge width ≤
100 mm
|
|
Dimensional tolerance |
+0/-
0.1 mm
|
|
Angle tolerance |
3 arc min or up to 5 arc sec on request |
|
Chamfer |
up to
3 mm
х 45о |
|
Surface flatness |
1/4 at λ= 632.8 nm |
|
Surface quality |
0.01-mm wide scratches of total length 2x over working aperture |
Rectangular trihedral (triple)
Application: Triple prisms are intended for use in interferometers for incident and reflected beams alignment.
|
Material |
BK-7 quality optical glass, fused silica |
|
Dimensions |
bottom diameter ≤
80 mm
; others - on request |
|
Dimensional tolerance |
+0/-
0.05 mm
|
|
Angle tolerance |
± 10 arc sec or up to 2 arc sec on request |
|
Chamfer |
0,25÷0,5 mm at 45о |
|
Flatness |
1/10 at λ= 632.8 nm |
|
Surface quality |
0.06-mm wide scratches of total length 2x over working aperture |
|
Coating |
without coating or legs coated with Al and black varnish protection |
|
Cleaning |
Non-abrasive method, acetone or isopropyl alcohol on lens tissue are recommended |
|
Damage threshold |
100W/cm2 CW, 2 J/cm2 with 10 n/sec pulses | |
PLANAR (KBTEM)