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

20mm 70R/30T Standard Cube Beamsplitter

Stock #68-538
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Dimensions (mm):
20.0 x 20.0 x 20.0 ±0.10
Wavelength Range (nm):
400 - 700
Surface Flatness:
Beam Deviation (arcmin):
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Reflection/Transmission Ratio (R/T):
Reflection/Transmission Tolerance (%):
Standard Beamsplitter
λ/4 MgF2 @ 550nm on Faces
Multilayer Dielectric on Hypotenuse
Protective bevel as needed
Surface Quality:

Regulatory Compliance

RoHS 2015:
Reach 223:

Product Family Description

  • Multi-Layer Dielectric Coating
  • Several Beamsplitting Ratios Available
  • Multiple Sizes Available

Constructed by cementing two right angle prisms together, TECHSPEC® Standard Cube Beamsplitters offer a range of reflection/transmission ratios. An interference coating has been applied to the hypotenuse surface of one of the prisms to provide the designated reflection/transmission ratio. Absorption loss to the coating is minimal.

Note:  Output is partially polarized, making TECHSPEC Standard Cube Beamsplitters suitable for illumination and other applications where polarization is not a concern. If polarization sensitivity is critical to your application, we recommend using TECHSPEC® Polarizing Beamsplitters or TECHSPEC® Non-Polarizing Beamsplitters.

Technical Information

Technical Information

Technical Information