Diffraction by Circular Aperture

Optics > Diffraction

DCS# 6C20.30

DIFFRACTION BY CIRCULAR APERTURE

APPARATUS

diverging lens, f = -11 cm	202-21-E5
diverging lens, f = -20 cm	202-21-E5
pinhole aperture	202-21-E5
3 lens holders	113-01-C6
ring stands and clamps	202-01
laser	202-21-B6
large ground glass screen	202-21-D4
video camera	202-09-C4

DESCRIPTION

The diffraction pattern produced by circular apertures in the path of a laser beam is projected on a screen and displayed using the video camera. Patterns from a straight edge and a pinhead can also be shown with this set up.

NOTES

Use macro setting on video camera and stop down aperture.