Patent ID: 7215609

Claim:
An optical reproducing apparatus for reproducing information recorded on plural classifications of media each having a different track pitch by irradiating light on said media, comprising: a light source for generating light fluxes of plural kinds of wavelengths; a lens for focusing said light fluxes on said media; means that is provided between said light source and said lens and that forms five spots 1 mm a light flux having one wavelength selected from said light fluxes that have plural wavelengths, said five spots being formed so as to be irradiated non-collinearly on one medium of said media; and a photodetector for detecting reflected light fluxes of said five non-collinear spots from said one medium; wherein said five non-collinear spots comprise a main spot, two first sub spots, and two second sub spots, said two first sub spots being symmetrically arranged a first distance from the main spot, on opposing sides thereof in a radius direction of the-one medium, and said two second sub spots being symmetrically arranged a second distance from the main spot, on opposing sides thereof in the radius direction of the-one medium, and wherein the second distance is about twice the first distance.