«KBTEM-OMO»
JOINT STOCK COMPANY
 
Prisms

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