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Penta Prism

Penta Prism Drawing

 

The Penta Prism is a five-sided prism with two reflecting surfaces at 45?to each other.  Penta prism can deviate an incident beam without inverting or reversing to 90? The deviation angle of 90?is independent of any rotation of the prism about an axis parallel to the line of intersection of the two reflecting faces. It is suitable for applications require exact 90?deviation without the need to align the prism precisely. Penta Prism are commonly used in Plumb Level, Surveying, Alignment, Range finding and Optical Tooling.

Features:

  • Precise 90?deviation of input beam
  • No need to precisely align the prism to the input beam
  • Image neither inverted nor reversed
  • Up to 3 arc accuracy

Coating:

The reflecting surfaces of this Prism must be coated with a metallic or dielectric coating. The standard Penta Prism reflecting surfaces are coated with aluminum or enhanced aluminum. The entrance or exit faces can be either uncoated or anti reflection coated (AR coating) as required.

Material:

Conventional material used for fabricating Penta Prism is BK7 glass.  Red Optronics can fabricate Penta Prism with custom materials if required.

Specifications:
 
 

Standard

Precision

Super PrecisionNEW 

Material:

BK7 Grade A optical glass or Custom Material

Dimension Tolerance: ?0.2mm
90?Deviation Tolerance: < 30 arc <10 arc seconds <3 arc seconds
Flatness:

l/2 at 632.8nm

l/4 at 632.8nm

l/4 at 632.8nm

Reflectivity:  R > 95% per face from 630 to 680 nm
Surface Quality: 60/40 (Scratch/Dig)

How to Order (Example):

 

Example

Material: BK7
Entrance/Exit Faces: 30 x 30 mm +/- 0.2mm
Long Face: 35 mm +/- 0.2mm
Surface Quality: 60/40
Wavelength: 420-700nm (visible light)
Figure: 0.25 wave at 633nm
Angles: < 30 arc seconds
Coating: <0.5% R (420-700nm 30x30mm faces); 
0.25 wave MgF2@500nm (one long face)

Standard Product Information:


1 min. deviation

30 sec. deviation

10 sec. deviation

A x h (mm)

Part No.

Part No.

Part No.

7 x 6

RPP101

RPP201

RPP301

8 x 8

RPP102

RPP202

RPP302

10 x 10

RPP103

RPP203

RPP303

12 x 12

RPP104

RPP204

RPP304

15 x 15
RPP105
RPP205

RPP305

20 x 20
RPP106
RPP206

RPP306

Note: special size and coating are available upon request.

Red Optronics offers custom manufacturing of Penta Prisms at very competitive price.  Our monthly output is 10,000pcs. Please contact us and get a free quote.  

 

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