50 Micron pinhole for foucault tester or other scientific purposes. large 1 3/4 inch in diameter.
This
pinhole is precision laserdrilled then mounted into an aluminum holder
is 0.6mm thick and the pinhole is 0.05mm or only .002 of an inch thick.
These pinholes are outstanding and unrivaled quality due to the
thinness of the pinhole and the perfect forming of the aperture using
the most advanced methods.
Holders can be custom machined to and size that suits your needs These are scientific grade apertures and have been utilized by
universities and laboratories. The second photo shows the pinhole at
800x under the microscope.