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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

25 x 35.36 x 1mm NIR, Elliptical Plate Beamsplitter

Elliptical Plate Beamsplitters

Stock #48-916 3-5 days
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Clear Aperture (%):
Coating Specification:
Surface 1: 50R/50T (Rabs ±5% @ 900nm, Ravg ±10% @ 700 - 1100nm)
Surface 2: Ravg ≤1.0%, Rabs ≤2.0% @ 700 - 1100nm
Cut with 0.25mm Maximum Edge Chip
Major Axis (mm):
36.36 +0.0/-0.70 (physical length)
Minor Axis (mm):
25.00 +0.0/-0.10
Parallelism (arcmin):
Reflection/Transmission Ratio (R/T):
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Surface Flatness (P-V):
<2λ (per inch)
Surface Quality:
Thickness (mm):
Thickness Tolerance (mm):
Standard Beamsplitter
Wavelength Range (nm):
700 - 1100

Regulatory Compliance

RoHS 2015:
Certificate of Conformance:
Reach 240:

Product Family Description

  • Circular Profile at 45°
  • Visible and NIR Coating Options Offered
  • Ideal for Diffuse Axial and In-line Illumination

TECHSPEC® Elliptical Plate Beamsplitters maximize beamsplitting efficiency while minimizing required mounting space. These beamsplitters are ideal for diffuse axial and in-line illumination. When oriented at 45°, the beamsplitters create a circular aperture equal to the diameter of the minor axis. TECHSPEC® Elliptical Plate Beamsplitters are available with either a visible or NIR 50% reflection/50% transmission beamsplitter coating and feature a high efficiency multi-layer anti-reflection (AR) coating to reduce back reflections. The beamsplitters are offered in either a 1 or 3mm thickness, in a range of major and minor axis measurements and wavelength ranges.