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25.4mm Sq 30R/70T, VIS-NIR Polka-Dot Beamsplitters

VIS-NIR Polka-Dot Beamsplitters

Stock #15-984
Qty 1-10
Qty 11+
Volume Pricing
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Dimensions (mm):
25.4 x 25.4 +0.0/-0.5
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Reflection/Transmission Ratio (R/T):
Reflection/Transmission Tolerance (%):
±5 @ 45°
Wavelength Range (nm):
400 - 2000
Square Aluminum (AlMgF2) Apertures
Parallelism (arcmin):
Angle of Incidence (°):
0 - 45
Center to Center Spacing (mm):
Clear Aperture (%):
Minimum Aperture (mm):
Operating Temperature (°C):
150 Maximum
Surface Quality:
Thickness (mm):
1.50 ±0.1
Standard Beamsplitter

Regulatory Compliance


Product Family Description

  • 50/50 and 30/70 Reflection/Transmission Ratios Available
  • B270 Substrates for High Performance from 400 – 2000nm
  • UV-NIR Versions Available

VIS-NIR Polka-Dot Beamsplitters feature a constant reflection/transmission ratio over the VIS to NIR spectrum.  A vacuum deposited enhanced aluminum coating on SCHOTT B270 substrates, with fixed square apertures guarantees 30/70, 50/50 reflection/transmission ratios from 400 to 2000nm. Incident light is reflected by the coated area and is transmitted through the surrounding uncoated substrate. VIS-NIR Polka-Dot Beamsplitters are not angle sensitive, therefore they are ideal for splitting energy from a radiant light source with a beam diameter of at least 2mm. These beamsplitters are especially useful with broadband, extended sources, such as tungsten, halogen, and xenon lamps, and for use in monochromators, spectrophotometers, and other optical systems.

Note: The surface of these beamsplitters is very sensitive and should never be touched when handling the optic. If cleaning is required to remove dust particles, non-contact cleaning using clean compressed air is recommended.

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15mm Sq., Fixed Filter Holder Fixed #54-996 A$92.80
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25/25.4mm Sq. Kinematic Mount, 2 Screws Adjustable - Tip-Tilt #58-857 A$139.20
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25/25.4mm Sq. Kinematic Mount, 3 Screws Adjustable - Tip-Tilt #58-860 A$152.00
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Filter Kinematic Mount, 2-Screw Adjustable - Tip-Tilt #58-874 A$166.40
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60mm sq - Rectangular Bar Clamp Fixed #54-995 A$174.40
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Filter Kinematic Mount, 3-Screw Adjustable - Tip-Tilt #58-875 A$180.80
Qty 5+ A$162.72 Request Quote
  • 3-5 days