Rectangular Large-Aperture Polarizing Beam Splitter

High-quality surplus polarizing beam splitter prism, professionally cleaned and in pristine optical condition. No visible scratches, chips, coating damage, or haze on any polished surfaces. This is a precision dielectric-coated optic with a clear diagonal interface, delivering sharp polarization separation.

Key Specifications:

• Type: Polarizing Beam Splitter (PBS) prism

• Function: Splits unpolarized or mixed-polarization light into two orthogonal linear polarizations: s-polarization reflected at 90°, p-polarization transmitted with high efficiency (>95% typical for both paths in the design band). Can also be used in reverse to combine two orthogonal polarizations into one beam.

• Construction: Two right-angle prisms optically cemented with multi-layer dielectric polarizing coating on the hypotenuse.

• Dimensions: 29 mm × 28 mm × 12 mm (large ~28–29 mm clear aperture, compact 12 mm thickness).

• Optical Faces: Four polished faces with broadband anti-reflection coatings (visible blue/magenta tint for minimal loss).

• Edges: Two ground/unpolished edges (standard for many mounted or surplus optics; no impact on performance).

• Material: N-BK7 optical glass (industry-standard for visible PBS components).

• Design Wavelength: Broadband visible spectrum

• Condition: Surplus stock, carefully cleaned and inspected. Optically excellent with high-contrast splitting

Applications & Uses:

• Laser polarization control and cleanup (e.g., isolating a single polarization from diode or HeNe lasers).

• Interferometry setups (Michelson, Mach-Zehnder, Sagnac).

• Holography and photonic experiments requiring orthogonal polarization separation/combination.

• Polarimetry, optical isolation (with quarter-wave plates), and attenuators.

• Education and demonstration of polarization principles.

• Prototyping in photonics, machine vision, or biomedical optics.

The large aperture accommodates bigger beam diameters, while the thin 12 mm profile allows very close spacing of the two output ports—ideal for compact builds where standard cubes would be too bulky.