Patent ID: 7965606

Claim:
A method for forming a first latent image for forming a track and a second latent image with a single beam, said method comprising, while an original disc rotates one turn, at least once performing: a first step of forming said first latent image by irradiating said original disc with said single beam; a second step of deflecting, when said single beam has reached a first position on said original disc while forming said first latent image, said single beam used for forming said first latent image, in a radial direction of said original disc to a second position on said original disc at which said second latent image is to be formed; a third step of forming said second latent image by deflecting said single beam in a tangential direction of said original disc while irradiating said original disc with said single beam; and a fourth step of deflecting said single beam to a position at which said first latent image is to be formed, when said single beam has reached a predetermined third position other than said second position.