What is it?

BK7 Optical Spacer Ring/ Beam Splitter/ Plan-Parallel Glass for Laser & Optics DIY This is a precision optical ring made from BK7 glass – a high-quality, low-dispersion optical material used in many scientific and industrial applications. The ring has a plan-parallel geometry and is ideal for custom optics setups, laser experiments, or educational demonstrations. Specifications: Outer diameter: 36 mm Inner diameter (Hole aperture): 22 mm

Thickness: 2 mm

Material: BK7 optical glass

Surface quality: Polished, uncoated

Geometry: Plan-parallel

Flatness and parallelism suitable for optical alignment

Typical uses:

Optical path compensator for laser setups

Spacer or support in beam collimation systems

Aperture or mask for custom filter assemblies

DIY interferometer and optics experiments

Optical art or sci-tech display element

Why did you make it?

This ring can be used in precision optics labs, DIY laser rigs, or as part of your next experimental project. Due to the central hole, it can also be adapted for coaxial illumination systems or mounting optical elements inside the clear aperture.

What makes it special?

Unique Selling Proposition (USP Item)