The endpoint of laser speckle pattern meridional refraction.
Motion of the speckle pattern observed by an ametrope viewing laser light reflected from a rotating cylinder with a matte surface is discussed. Mathematical expressions are derived for the apparent speed and direction (angular velocity) of the pattern when spherical neutralizing lenses are put in place and conditions for an endpoint appropriate for meridional refraction are discussed.
D001251:Astigmatism / Q000175:diagnosis*; D006801:Humans; D007834:Lasers; D008433:Mathematics; D008722:Methods; D012029:Refraction, Ocular