Product Features
Low-Reflectivity Chrome Obstruction Targets: Ø10um-Ø5000um Available
Obstructions Centered on DIA25.4mm Soda Lime Glass Substrates
Chrome OD >3.0 @ 400 - 2500nm)
100% Clear Aperture

Full Aperture Obstruction Targets consist of a low-reflectivity chrome obstruction centered on a soda-lime glass substrate. The full aperture opening outside the obstruction diameter is 100% surface cared. They are designed for applications such as zero-order beam blocking, investigating stray light, darkfield microscopy, or phase imaging.

The positive obstructions consist of low-reflectivity (LRC) chrome, which reduces back reflections from the opaque chrome target improving imaging contrast. The LRC coating results in <10% light reflected from the target from 300 - 500 nm. Our chrome glass target also provides an OD>3 @ 400 - 2500 nm.