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Plate Beamsplitters > Chromium Plate Beamsplitters BK7

Introduction

Chromium plate beamsplitters are one of plate beamsplitters that are coated with chromium (Cr) on the surface of optical parallels or wedged substrates. The other surfaces are coated with multilayer antireflection coatings. Half mirror divides input beam to reflectance and transmittance in 50%:50%.Plate beamsplitters have beam deviations of transmission and ghosts by rear surface reflection. Wedged substrates are used to prevent ghosts.
 
 

Standard Specifications

  
 

Items

Specifications

Material

BK7 Grade A or equivalent Optical Glass

Dimension Tolerance

+0.0/-0.2 mm

Thickness Tolerance

± 0.2 mm

Clear Aperture

> 90%

Parallelism

5 arc seconds

Flatness

λ/10

Surface Quality

scratch and dig 40-20

Bevel

0.5 (0/-0.3) mm

Angle of incidence

45°

Coating

Front surface: Chromium (R : T = 50%:50%)
Rear surface: Multilayer antireflection coating

Notes:

Please show us the size and the coating specification 		 
   
 

Part NO.

D(mm)

t(mm)

Parallelism

Wavelength Range

BCM0101

30.0

3.0

5 arc sec.

400-700 nm

BCM0102

30.0

5.0

1° Wedge

400-700 nm

BCM0103

40.0

4.0

5 arc sec

400-700 nm

BCM0104

50.0

5.0

5 arc sec

400-700 nm

BCM0105

50.0

8.0

1° Wedge

400-700 nm

BCM0106

60.0

6.0

1° Wedge

400-700 nm

BCM0107

30.0

3.0

5 arc sec

750-850 nm

BCM0108

30.0

5.0

1° Wedge

750-850 nm

BCM0109

50.0

5.0

5 arc sec

750-850 nm

BCM0110

50.0

8.0

1° Wedge

750-850 nm

 

 

 

  

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