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Brewster Window > Brewster Window BK7

Introduction

Windows for installation at the Brewster angle. Reflects a polarized light whose electric field vector oscillates orthogonally to the plane of incidence and transmits a polarized light whose electric field vector oscillates in parallel with the plane of incidence with a minimum reflection loss.
 
 

Standard Specifications

  
 

Items

Specifications

Material

BK7 Grade A or equivalent Optical Glass

Designed Wavelength

546.1 nm

Designed Index

1.5183 ±0.0005

Dimension Tolerance

+0.0/-0.2 mm

Thickness Tolerance

± 0.2 mm

Clear Aperture

> 85%

Parallelism

< 3 arc minutes

Flatness

λ/4 at 632.8 nm

Surface Quality

scratch and dig 60-40

Bevel

0.5 (0/-0.3) mm

Notes:

1. Surface Quality could reach 40-20, 20-10,10-5

2. Parallelism such as 30” , 10” is available.

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

  
   
 

Part NO.

Minor Axis (mm)

t(mm)

BTW0101

12.7

2.0

BTW0102

12.7

2.0

BTW0103

25.4

2.0

 

 

  

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