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Beamsplitter
Optical Beamsplitters (Plate & Dielectric Beam Splitters)
Optical beamsplitters (plate-type dielectric beamsplitters or beam-splitting optical filters) are precision thin-film optical components designed to divide incident light into two separate output beams (transmitted and reflected) at predetermined intensity ratios or specific wavelength bands.
Functions:
Engineered using multi-layer inorganic dielectric coatings deposited on high-flatness optical glass substrates via PVD-EBGE. They deliver highly controllable, stable transmission-to-reflection splitting ratios (e.g., 50:50, 70:30, 80:20, or custom spectrally non-neutral split ratios) with minimal internal absorption loss, maintaining beam wavefront integrity and high angular tolerance for polarized or unpolarized light engines.
Applications:
Interferometry
Optical beam combiners
Coaxial illumination modules
Biomedical imaging systems
Precision laser guidance systems
Automated Optical Inspection (AOI) machine vision setups
#BS3070 #BS-UVA80 #BS-UVA50
#Information and Notes
ITEM NO: BS5050 (Beamsplitters 50T/50R)
Spectral Characteristics
Tave=50 +/-5% @ 420-700nm aoi=45°
Physical Characteristics
Glass: 1.1, 3.0mm
Square: 8x8 - 220x220mm
Round: Dia8 - 210mm
Resistant Temperature
Glass: 150℃
ITEM NO: BS5050AR (Beamsplitters 50T/50R,
with AR Coating)
Spectral Characteristics
Tave=50 +/-5% @ 420-700nm aoi=45°
Side2: AR Coating @ 420-680nm
Physical Characteristics
Glass: 1.1, 3.0mm
Square: 8x8 - 220x220mm
Round: Dia8 - 210mm
Resistant Temperature
Glass: 150℃
ITEM NO: BS7030 (Beamsplitters 70T/30R)
Spectral Characteristics
Tave=70 +/-5% @ 420-700nm aoi=45°
Physical Characteristics
Glass: 1.1, 3.0mm
Square: 8x8 - 220x220mm
Round: Dia8 - 210mm
Resistant Temperature
Glass: 150℃
ITEM NO: BS-UVA80 (UV Beamsplitters 80T/20R)
Spectral Characteristics
Tave=80 +/-5% @ 340-380nm aoi=45°
Physical Characteristics
B270: 1.1mm
Square: 8x8 - 220x220mm
Round: Dia8 - 210mm
Resistant Temperature
B270：150℃
ITEM NO: BS-UVA50 (UV Beamsplitters 50T/50R)
Spectral Characteristics
Tave=50 +/-5% @ 340-380nm aoi=45°
Physical Characteristics
B270: 1.1mm
Square: 8x8 - 220x220mm
Round: Dia8 - 210mm
Resistant Temperature
B270：150℃
Information and Notes
1. Precision plate beamsplitters feature multi-layer dielectric interference coatings comprising 10 to 18 layers vacuum-deposited on Side 1 of high-flatness optical glass substrates to achieve precise transmission-to-reflection ratios.
2. Optional Side 2 anti-reflection (AR) coating: A multi-layer broadband AR coating can be applied to the second surface to suppress back-surface Fresnel reflection from ~4% down to under 0.5%, eliminating ghosting and secondary reflections.
3. Manufactured using Physical Vapor Deposition with Electron Beam Gun Evaporation (PVD-EBGE) technology, ensuring high optical coating density, minimal absorption loss, and superior environmental durability.
4. Spectral transmittance and reflectance curves are calibrated and measured at a standard 45° angle of incidence (AOI).
5. Transmittance curves reflect actual physical sample measurement data and are subject to minor manufacturing tolerances between production lots while remaining strictly within target optical specifications.
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