Point source diffraction and its use in an encoder.
Diffraction from a point light source (a laser diode) was studied. The diffraction images were found to be magnified without using a lens and to move corresponding to the displacement of the slit aperture. A digital encoder using this diffraction is proposed to obtain very high resolution without a lens.
J
J
Akedo
H
H
Machida
H
H
Kobayashi
Y
Y
Shirai
H
H
Ema