Plate & Cube Beam Splitters

Plate beam splitters consist of a thin plate of optical  glass with a different type of thin film coating  on each side. The first surface is coated with an all-dielectric film having partial reflection properties over either the visible or the near-infrared spectrum. The benefit of this type of coating is that it has low absorption, typically 0.5 percent for a 50/50 splitter at 45°.


Cube beam splitters consist of two identical right-angle prisms with their hypotenuse faces cemented together. Prior to cementing, a partial reflection film is deposited onto one of the faces. For best results, the incident beam should be on one of the faces of this prism.  For better performance cube beams plitters should be antireflection-coated on all four faces to minimize ghost images. 


Cube beam splitter have several advantages over plate beam splitters and are widely used for a variety of reasons. Cube  beam splitter deforms much less when Compare to  plate Beam splitter . Most of the unwanted reflections from a cube beam splitter are in the retro direction and do not contribute to ghost images. The coating is very resistant to degradation with time because it is concealed in between prisms of the cube.

Types of Beamsplitter and Selection Guide

Selection Criteria :

 

  • Polarizing or non-polarizing
  • Non-polarizing beam Splitting ratio (examples may be 50-50, 70-30, 90-10)
  • Separating Wavelength
  • Power handling (high power or high incident laser energy)
  • Beam displacement tolerance
  • Cube or plate Beam splitter

Specification

Plate

Cube

Wavelength 

  • 230 nm to 5000 nm
  • 230 nm to 5000 nm

Dimensions

  • 6 – 150 mm diameter
  • 6x6x6mm--50x50x50mm

Beam splitting Ratio

  • Polarizing or non-polarizing
  • Beam ratios from 90-10 to 50-50
  • Wavelength separation
  • Long pass or short pass
  • Polarizing or non-polarizing
  • Beam ratios from 90-10 to 50-50
  • Wavelength separation
  • Long pass or short pass

Coating types 

  • E-beam dielectric optimized for LIDT
  • Backside AR coating to minimize ghosting
  • Low phase shifting coating designs
  • E-beam dielectric coated for LIDT

Non Polarizing Cube Beam Splitter

Specification

Grade

Material

BK7

Diameter

10mm To Maximum

Clear Aperture

>80%

Flatness

< λ / 4 @ 633 nm

Beam Deviation

<3 arc minutes

Chamfer

Protected <0.5mm*45`

Peak Transmission

>45%

Polarization

<6%

Coating

AR Coating

A beam splitter is used to split a beam of incident light in two. Our optical beam splitters are made from high-grade glass materials with laser grade surface flatness and surface quality for tighter tolerance on the beam splitting ratio.

 
These non-polarizing block beamsplitters are covered with the goal that the s and p segments agree in reflectance at the wavelength of intrigue. This implies they won’t change the condition of polarization of the episode shaft. They are hostile to reflection covered on the four outside appearances. These are not planned for high power use because of the concrete between the two crystals.

Beam Splitter:  Broadband

Diameter: Laser beam manipulation, life science instrumentation

Material: BK7

Filter:  Laserline

Diameter: Low power applications

Material: BK7

Dimension

Material

Reflection / Transmission %

Wavelength Range

Beam Deviation

Surface Flatness

12.5mm x 12.5mm x 12.5mm +/-0.1

BK7

30/70 ; 70/30 ; 50/50

400-700 nm

5 arc min

Lambda/4

20mm x 20mm x 20mm +/-0.1

BK7

30/70 ; 70/30 ; 50/50

400-700 nm

5 arc min

Lambda/4

25mm x 25mm x 25mm +/-0.1

BK7

30/70 ; 70/30 ; 50/50

400-700 nm

5 arc min

Lambda/4

37.5mm x 37.5mm x 37.5mm +/-0.1

BK7

30/70 ; 70/30 ; 50/50

400-700 nm

5 arc min

Lambda/4

50mm x 50mm x 50mm +/-0.1

BK7

30/70 ; 70/30 ; 50/50

400-700 nm

5 arc min

Lambda/4

Polarizing Cube Beam Splitter

A beam splitter is used to split a beam of incident light in two. Our optical beam splitters are made from high-grade glass materials with laser grade surface flatness and surface quality for tighter tolerance on the beam splitting ratio.

Specification

Grade

Substrate

BK7

Dimensional Tolerance

± 0.010″

Angle of Reflectance

90°

Clear Aperture

>80%

Beam Deviation

< 3 minutes

Transmission of p-polarization

Tave > 90%

Reflectance of s-polarization

Rave > 99.8%

Peak Transmission

>45%

Clear Aperture

> 85%

Beam Splitter:  Broadband

Diameter: These Lenses Have Considerably Reduced Values Of Spherical Aberrations. Best Used To Replace Single Components Where Performance Must Be Improved.

Material: Combinations Of Two Optical Grade Glasses

Filter:  Laserline

Diameter: Used In Pulsed Laser Systems For Purifying The Polarization State In Multimode Lasers.

Material: BK7