25mm Protected Aluminum Coated Right-Angle reflecting Prism

Precision surplus right-angle reflecting prism in excellent optical condition. Carefully cleaned with no visible scratches, chips (minor edge bevels only), or coating degradation on polished surfaces. The hypotenuse features a high-quality protected aluminum mirror coating for durable, high-reflectivity performance.

Key Specifications:

• Type: Right-angle prism mirror (aluminum-coated hypotenuse for 90° beam deviation).

• Function: Redirects light by 90° via reflection off the coated hypotenuse. Light enters one leg face, reflects internally with high efficiency (>90% typical in visible/NIR), and exits the other leg. The metallic coating ensures reliable reflection across a broad wavelength range and incidence angles (beyond TIR limits of uncoated prisms).

• Material: N-BK7 optical glass

• Dimensions: Legs: 25 mm × 25 mm; Height/Thickness: 25 mm; Hypotenuse: ~35.4 mm × 25 mm (isosceles right triangle profile).

• Coatings: Protected aluminum on hypotenuse (broadband high reflection, ~400–1100 nm typical); Legs polished (likely uncoated or minimal AR – clear transmission visible).

• Condition: Surplus item, professionally cleaned and inspected. Optically pristine with sharp, bright reflection and clear faces.

Applications & Uses:

• Beam steering and 90° turning in laser systems, interferometers, or optical benches.

• Periscopes, telescopes, binoculars, or imaging systems (pairs can form Porro prisms for image erection).

• Spectroscopy, machine vision, or photonics prototyping.

• Education and demonstrations of reflection, refraction, and geometric optics.

• General lab use where a compact, rugged turning mirror is needed (more stable than flat mirrors).

This classic 25mm size provides a generous aperture for beams up to ~20–22 mm while remaining compact and easy to mount.