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Beam splitting prisms and assemblies play an integral role in optical systems by dividing, recombining, and managing the directions of multiple beam paths. Beams of light may be divided into separate wavelengths and polarization states, or they may be split for specific values of transmittance and reflectance that are averaged over or invariant to wavelength and polarization.

Precision Optical offers a wide selection of both standard and custom beam splitters of the following varieties:

All varieties of beam splitters are available in a wide selection of sizes and glass types, with tight surface quality, angles, dimensions, flatness, and transmitted wavefront requirements. Custom facets, chamfers, notches, and other features are also available. Our experienced sales staff works closely with our coating engineers to analyze beamsplitter coating and anti-reflection coating requirements on a case-by-case basis in order to find solutions to our customers’ unique applications.

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Typical Specifications

  • Material: N-BK7, Fused Silica, Custom
  • Sizes (mm): 3mm to 150mm
  • Dimensional Tolerance: ± 0.012mm to ± 0.250mm
  • Clear Aperture Types: circular, square, custom
  • Clear Aperture Sizes: < 0.5mm to < 1.0mm to edges
  • Surface Quality: Per MIL-PRF-13830_B; ANSI/OEOSC OP1.002-2009; ISO 10110
  • Edge Chamfers: 0.25mm – 0.50mm face width or custom
  • Surface Flatness: λ/40 – λ/8
  • Angles / Deviation: < 1 arc second to < 5 arc minutes
  • Transmitted & Reflected Wavefront Error (TWE/RWE) λ/20 – λ/4
  • Coatings: Polarizing, non-polarizing, dichroic, LWP, SWP, custom multiband and associated antireflective coatings


Donald A. Pearson II

Äpre Instruments

I am always very happy with Precision Optical. Their lead times and delivered product are excellent. I wish more of our suppliers were like Precision Optical!

Brian Monacelli, Ph.D.

Laser Technology Professor - Pasadena City College

Partnering with Precision Optical through their Ensign-Lambert Optics Education Program has allowed over 120 of my laser and optical technology students to gain real-world perspective with hands-on work in optics. These interactions directly motivate the next generation of technicians as they learn first-hand how this fascinating work with industrial hardware will translate into rewarding careers.