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Beamspiltter&Polarizer
Beamspiltter&Polarizer
Beamspiltter&Polarizer
Beamspiltter&Polarizer
Beamspiltter&Polarizer
Beamspiltter&Polarizer
Beamspiltter&Polarizer

Beamsplitters & Polarizers

Beamsplitters are used to split or combine beam of light. The forms that are in common use provided by Honour are plates and cubes. Plates are used for most laser application as they exhibit low absorption. Cubes are a convenient, protected form for low power applications. The performances of beamsplitters mainly depend on coating specifications. When selecting beamsplitters, forms, coating, transmission and damage threshold should be considered.

 

Narrow Band and Broadband Beamsplitter Plates

 

Specifications

Material

BK7     grade A optical glass

Dimension     Tolerance

±0.2mm

T/R

50/50±5%,     for random polarization

Surface     Quality

60/40     scratch and dig

Beam     Deviation

<     1arc minutes

Flatness

λ/4 @     632.8 nm per 25mm

Coating

(Incidence     angle：45 degree)
    S1：Single Wavelength partial reflectance
    S2：“V”AR-coatings for Narrow Band Beamsplitter Plates
    S1：Broadband partial reflectance
    S2：BBAR-Coatings for Broadband Beamsplitter Plates

 

 

Narrow Band and Broadband Beamsplitter Cubes

Specifications

Material

BK7     grade A optical glass

Dimension     Tolerance

±0.2mm

T/R

50/50±5%,     T=(Ts+Tp)/2, R=(Rs+Rp)/2

Surface     Quality

60/40 scratch     and dig

Beam     Deviation

< 3     arc minutes

Flatness    

λ/4 @     632.8 nm per 25mm

Coating

Single     wavelength or Broadband partial reflectance：on hypotenuse face “V”AR-coating     or BB AR-coating：on all input and output face

 

 

Polarization Beamsplitter Cubes

 

Features

  • Widely used in most application

  • Good Extinction Ratio

 

Specifications

Material

BK7or SF     glass

Dimension     Tolerance

±0.2mm

Extinction     Ratio

>100:1

Surface     Quality

60/40     scratch and dig

Beam     Deviation

< 3     arc 弧分

Flatness    

λ/4 @     632.8 nm per 25mm

Principal     Transmittance

Tp>95%     and Ts<1%

Principal     Reflectance

Rs>99%     and Rp<5%

Coating

Polarization     beamsplitter coating on hypotenuse face
    AR-coating on all input and output face

 

 

Glan Taylor Polarizer

Features

  • Air-spaced, medium power polarizer for visible or        near IR wavelengths Rejected beam absorbed internally,<5x10-6        extinction ratio

  • Close to Brewster's Angle Cutting

  • High Polarization Purity

  • Short Length

 

Specifications

Material    

a-BBO,     Calciteor YVO4

Wavelength     Range

a-BBO:     220-3000 nm; Calcite: 350-2200 nm; YVO4: 500-4000 nm

Extinction     Ratio

a-BBO:<5x10-6;     Calcite:<5x10-6; YVO4:<5x10-6

Surface     Quality

20/10     scratch and dig

Beam     Deviation

< 3     arc minutes

Wavefront     Distortion

λ/4@632.8nm

Damage     Threshold

>200     MW/cm2

Coating

As     required

Mount

Black     Anodized Aluminium

 

 

Glan Laser Polarizer

Features

 

  • Broadband high power        polarizers for visible or near IR wavelengths

  • Air-spaced

  • Close to Brewster's        Angle Cutting

  • High Polarization Purity        

  • Short Length

  • Double escape windows        for intracavity use

 

Specifications

Material

a-BBO.Calcite or YVO4

Wavelength Range

a-BBO.220-3000nm,Calcite:350-2200nm;YVO4;500-4000nm

Extinction Ratio

a-BBO:<5*10;Calcite<5*10;YVO4:5*10

Surface Quality

20/10 scratch and dig

Beam Deviation

<3 arc minutes

Wavefront Distortion

~/4@632.nm

Damage Threshold

>200MW/cm

Coating

single layer MgF2

Mount

Black Anodized Aluminium

 

 

Glan Thompson Polarizer

 

Features

  • Broadband low power        polarizers for UV, visible or near IR wavelengths

  • Large Acceptance Angle

  • High Polarization Purity        

  • Low Power Application

 

Specifications

Material

a-BBO, Calcite or YVO4

Wavelength Range

a-BBO: 220-3000 nm; Calcite: 350-2200 nm

Extinction Ratio

a-BBO:<5x10-6; Calcite:<5x10-5

Surface Quality

20/10 scratch and dig

Beam Deviation

< 3 arc minutes

Wavefront Distortion

λ/4@632.8nm

Damage Threshold

>200 MW/cm2

Coating

Single Layer MgF2

Mount

Black Anodized Aluminium

 

 

Wollaston Polarizer

Features

  • Wide Wavelength Rang

  • Low Power Application

  • Broadband 104 : 1        extinction ratio



Specifications

Material

a-BBO, Calcite, YVO4 and Quartz

Wavelength Range

a-BBO:220-3000 nm

Calcite:350-2200 nm

YVO4: 500-4000 nm

Quartz: 200-2300 nm

Extinction Ratio

a-BBO:<5x10-6; Calcite:<5x10-5;     YVO4:<5x10-5;Quartz:<5x10-4;

Surface Quality

60/40 scratch and dig

Beam Deviation

< 3 arc minutes

Wavefront Distortion

λ/4@632.8nm

Mount

Black Anodized Aluminium

 

 

Rochon Polarizer

 

Features

  • Wide Wavelength Range

  • High Extinction Ratio

  • High UV        Transmission/li>

  • Large Field Angle



Specifications

Material

a-BBO, Calcite, YVO4 and Quartz

Wavelength Range

a-BBO: 220-3000 nm

Calcite 350-2200 nm

YVO4: 500-4000 nm

Quartz: 200-2300 nm

Extinction Ratio

a-BBO:<5x10-6; Calcite:<5x10-5;     YVO4:<5x10-5;Quartz:<5x10-4;

Surface Quality

20/10 scratch and dig

Beam Deviation

< 3 arc minutes

Wavefront Distortion

λ/4@632.8nm

Damage Threshold

>500 MW/cm2

Coating

Protective coating on both surfaces

Mount

Black Anodized Aluminium

 

 

Depolarizer

Plane polarized beam is not welcomed in some circumstances such as   reflecting spectrometer.

A depolarizer will change the plane polarization into a mix of   polarization states by scrambling up the polarization.

the result is to change plane polarized beam into pseudo-depolarized   beam and produce depolarization.

Depolarizer is widely used in polarization sensitive instrument.

 

Specifications

Material

Quartz 200-2500nm

Wavelength Range

532-850

Dimension Tolerance

±0.2mm

Surface Quality

Better than 60/40 scratch and dig

Beam Deviation

< 3 arc minutes

Wavefront Distortion

λ/4 @632.8nm

Coating

Uncoated, AR coating available

 

 

 

 

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