Prisms

Penta Prisms

Penta prism deviates a beam through 90 degree without inverting and reversing it. The image from a penta prism is of the same orientation as the object. It is widely applied in measuring instruments, alignment systems, etc. Standard and broadband antireflection coatings are available upon request, see our standard optics components below.

penta-prism.jpg

Specifications

Parameter Precision Standard
Dimensional Tolerance: +0/-0.1 mm +0/-0.15 mm
Surface Figure at 632.8 nm(over 90% diameter): λ / 8 λ / 4
Beam Deviation: 30 arc sec. 3 arc min.
Surface Quality: 40-20 60-40
Clear Aperture: > 85 % of dimensions > 85 % of dimensions
Coating: custom custom

Penta Prisms

Leg A Leg B Leg C Material Part No.
A (mm) B (mm) C (mm) Name Precision Standard
10.00 10.00 10.00 BK7 KWPS 001 KWPG 001
12.70 12.70 12.70 BK7 KWPS 002 KWPG 002
15.00 15.00 15.00 BK7 KWPS 003 KWPG 003
20.00 20.00 20.00 BK7 KWPS 004 KWPG 004
25.00 25.00 25.00 BK7 KWPS 005 KWPG 005
25.40 25.40 25.40 BK7 KWPS 006 KWPG 006
50.80 50.80 50.80 BK7 KWPS 007 KWPG 007