Information recording method and information recording apparatus
To provide a new recording method and recording apparatus with respect to an optical recording medium, the recording method and recording apparatus being able to deal with a high density of an optical recording medium of recent years. Recording of a recording track and a prepit is carried out by sequentially deflecting a single beam.
1. 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.
2. The forming method of claim 1 , wherein said single beam is deflected from said second position to said third position when said second latent image is being formed.
3. The forming method of claim 1 , wherein said first position is a position where a position of formation of said first latent image and a start position of formation of said second latent image are closest to each other.
4. The forming method of claim 1 , wherein said third position is at an end of said second latent image.
5. The forming method of claim 1 , wherein, in said fourth step, the formation of said first latent image is restarted by deflecting said single beam.
6. The forming method of claim 5 , wherein, in said fourth step, a position to restart the formation of said first latent image is a position on said original disc where said single beam is deflected from a position of formation of said first latent image to a position of recording of said second latent image.
7. The forming method of claim 1 , wherein, in said third step, said second latent image is formed at a speed higher than a speed at which said first latent image is formed.
8. The forming method of claim 7 , wherein, in said third step, said second latent image is formed while deflecting said single beam in a direction opposite to a direction of rotation of said original disc.
9. The forming method of claim 1 , wherein said first latent image and said second latent image are formed in the form of adjoining arcs.
10. The forming method of claim 1 , further comprising:
a fifth step of forming said first latent image, for a predetermined time period after the formation of said first latent image is restarted, at a speed higher than a speed at which said first latent image is formed in said first step.
11. A manufacturing method of an exposed original disc 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.
12. A manufacturing method of an exposed original disc for forming a first latent image for forming a track and a second latent image with a single beam, said method comprising:
while forming said first latent image at a first position, deflecting said single beam in a radial direction of said original disc in response to a reception of a first deflection signal; and forming said second latent image at a second position by deflecting, in a tangential direction of said original disc, said single beam deflected by said first deflection signal;
and 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.
13. The manufacturing method of claim 12 , wherein said single beam is deflected by a second deflection signal to a position where said track is to be formed.
14. A manufacturing apparatus of an exposed original disc which forms a first latent image for forming a track and a second latent image with a single beam, said apparatus comprising, while said 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.
15. A manufacturing apparatus of an exposed original disc which forms a first latent image for forming a track and a second latent image with a single beam, said apparatus comprising:
a first control part of forming said first latent image by irradiating said original disc with said single beam;
a second control part 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 control part 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 control part 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.
16. A manufacturing apparatus of an exposed original disc which forms a first latent image for forming a track and a second latent image with a single beam, said apparatus performs operation of:
while forming said first latent image at a first position, deflecting said single beam in a radial direction of said original disc in response to a reception of a first deflection signal; and forming said second latent image at a second position by deflecting, in a tangential direction of said original disc, said single beam deflected by the first deflection signal;
and 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.
17. The manufacturing apparatus of claim 16 , wherein said single beam is deflected by a second deflection signal to a position where said track is to be formed.