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Penta Prisms > BK7 Precision Penta Prism

Introduction

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 commonly used in Plumb Level Surveying Alignment Range finding and Optical Tooling. 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.
 
 

Standard Specifications

  
 

Items

Specification

Material

BK7 Grade A or equivalent Optical Glass

Dimension Tolerance

± 0.20 mm

Surface Quality

scratch and dig 60-40

90° Deviation Tolerance

2 arc seconds

Flatness

λ/4 at 632.8 nm

Reflectivity

R > 95% per face from 400 to 700 nm

Notes:

1. Material, besides BK7, any other materials are available.

2. Deviation tolerance such as 1’, 30”, 10” is available.

3. Please show us the size and the coating specification.

  
   

90° Deviation Tolerance: 5 sec.

A×h (mm)

Part NO.

90° Deviation

7×5

PPA1101

5 sec.

10×10

PPA1102

 5 sec.

90° Deviation Tolerance: 2 sec.

A×h (mm)

Part NO.

90° Deviation

7×5

PPA1201

2 sec.

10×10

PPA1202

 2 sec.

 

  

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