Talbot Effect Images

A large number of pictures of the diffraction pattern of the light passed through the Ronchi ruling were collected. The 250 lines/inch Ronchi ruling was placed 13.0 cm from the source of diverging He-Ne laser light (wavelength 632.8 nm). The pictures cover the range from 5.5 cm from the ruling out to 23.0 cm, in 1.0 mm steps. The Talbot images of the ruling can be seen at 8.0 cm, 13.3 cm, 22.3 cm, and 40.9 cm, as shown below.


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