These pinholes are prepared from pure copper foil, 3 mm in diameter, 25 microns thick. They possess very high roundness and edge retention. Blackened on one surface. Mounted in black anodized aluminum discs. Mounted in a recessed hole in an anodized holder, 16 mm in diameter.
- Spatial filtering
- Controlling the diameter of light beams
- Creating point light sources
- Image analysis