Beamsplitter

Photonchina’s beamsplitters are used to split or combine beams of light. Plates are used for most laser applications as they exhibit low absorption. Cubes are a convenient, protected form for low power applications. The performance of a beamsplitter is mainly dependent on the coating specifications.

BEAMSPLITTER SPECTRUM PROPERTIES
BEAMSPLITTER PLATE Broadband Wavelength Beamsplitter plates can be used with high power lasers. When using beamsplitter plates, it is important to bear in mind that the two partial beams travel different optical paths. The optical paths depend on the incident angle and the thickness of the plates.
Single Wavelength
BEAMSPLITTER CUBE Broadband Wavelength Compare with beamsplitter plates, beamsplitter cubes have the following advantages:

-Identical path lengths for both the reflected and the transmitted beams

-The transmitted beam is neither display nor deflected

-Stable and compact

-Easy operation

-Easy to mount / align

Single Wavelength
PENTA BEAMSPLITTER CUBE Broadband Wavelength
630-680nm
T/R: 20%/80% ±5%Single Wavelength
The penta beamsplitter is composed of a penta prism and a wedge. Like the beamsplitter cube, it has the following properties:

-The transmitted beam is neither display nor deflected

– Stable and compact

-Easy operation

POLARIZING BEAMSPLITTER CUBE Broadband Wavelength The prism can be used as polarizers, beamsplitters, or beam combiners. The output beam, which is parallel to the input beam, is called a p-polarized beam while the orthoganal output beam is defined as the s-polarized beam.
Single Wavelength

 

 

BEAMSPLITTER PLATES CAPABILITY

ATTRIBUTE STANDARD PREMIUM
MATERIAL BK7 BK7
DIMENSION TOLERANCE ±0.1mm ±0.02mm
THICKNESS TOLERANCE ±0.1mm ±0.02mm
FLATNESS Per 25.4mm λ/4 @ 632.8nm Per 25.4mm λ/10 @ 632.8nm
SURFACE QUALITY 60-40 scratch and dig 10-5 scratch and dig
PARALLELISM <20 arc seconds <5 arc seconds
T/R T=(Ts+Tp)/2,

R=(Rs+Rp)/2

T/R=50/50, 80/20, 70/30, 90/10, 60/40

±5% @ λ c or λ b

T=(Ts+Tp)/2,

R=(Rs+Rp)/2

T/R=50/50, 80/20, 70/30, 90/10, 60/40

±3% @ λ c or λ b

COATING λ c: Single wavelength, λ b: Broadband wavelength

 

 

BEAMSPLITTER CUBES CAPABILITY

ATTRIBUTE STANDARD PREMIUM
MATERIAL BK7 BK7
DIMENSION TOLERANCE ±0.2mm ±0.1mm
FLATNESS Per 25.4mm λ/4 @ 632.8nm Per 25.4mm λ/10 @ 632.8nm
SURFACE QUALITY 60-40 scratch and dig 20-10 scratch and dig
T/R 50/50 ± 5% 50/50 ± 2%
BEAM DEVIATION <3arc minutes <30arc seconds
COATING Specified wavelength or T/R Specified wavelength or T/R

 

 

POLARIZING  BEAMSPLITTER  CAPABILITY

ATTRIBUTE STANDARD PREMIUM
MATERIAL BK7, SF2 BK7, SF2
DIMENSION TOLERANCE ±0.2mm ±0.1mm
SURFACE QUALITY 60-40 20-10
BEAM DEVIATION <3arc minutes <30arc seconds
EXTINCTION RATIO 100:1 Specify
PRINCIPAL TRANSMITTANCE Tp>95%, Ts<1% Specify
PRINCIPAL REFLECTANCE Rs>99%, Rp<5% Specify
COATING AR on all input and output surfaces BPS. Coating on hypotenuse (broadband wavelength: 450-680, 650-850, 900-1200nm, etc.) Specify