Optical recording apparatus for forming grooves and pits in an optically recordable disc

Abstract

There are provided an optical disc and an optical recording apparatus to form a tracking groove onto an optically recordable disc. This apparatus comprises: a recording beam generator to generate a recording beam such as a laser beam having a predetermined spot size so as to form a pattern of a predetermined width onto the disc; a light deflector arranged on an optical path of the recording beam generator; and a driver for driving the light deflector for reciprocally moving the recording beam in a radial direction of the disc at a high frequency, and for multi-exposing the disc by the recording beam due to the movement of the recording beam in the radial direction, whereby a groove having a width wider than the pattern of the predetermined width is formed. With this apparatus, both the discrete information pattern and a groove are formed by using a single recording beam. Namely, both the pits and a wide groove can be formed by using a single recording spot.

What is claimed is: .[.1. An optical recording apparatus to form a tracking groove onto an optically recordable disc, comprising: 
     
        also formed..]. 3. An apparatus according to claim .[.1.]. .Iadd.11.Iaddend., wherein said high frequency f o  is given by the following equation,   f.sub.0 >v/d     where, v is a relative velocity between the recording beam and the disc due to a rotation of the disc and d indicates a spot size of the recording   
     
     
        beam. 4. An apparatus according to claim .[.2,.]. .Iadd.12 .Iaddend.wherein said drive means drives said light deflecting means so as to reciprocatingly move the recording beam in the radial direction of the disc at the high frequency, multiple exposes the disc by the recording disc due to the movement of the recording beam in the radial direction, reciprocatingly moves the recording beam in the radial direction of the disc at a low frequency, and wobbles said tracking groove having the width wider than the pattern of said predetermined width and said discrete 
     
     
        information pattern. 5. An apparatus according to claim .[.2,.]. .Iadd.12 .Iaddend.wherein said light deflecting means and said light modulating 
     
     
        means are constructed by one acoustic optical means. 6. An apparatus according to claim 5, further having a lens for converging the beam which 
     
     
        enters said acoustic optical means. .Iadd.7.  An optical recording method to form a tracking groove on an optical disc wherein a tracking groove is wobbled in the radial direction of the optical disc, said optical recording method comprising: the steps of generating a recording beam from a recording beam generating means, deflecting said recording beam in the radial direction of the optical disc using light deflecting means, said light deflecting means being driven at a high frequency; and   exposing the optical disc with said recording beam which moves in the radial direction of the optical disc;   whereby the tracking groove has a width which is wider than the spot size of the recording beam which is formed on the optical disc and said tracking groove wobbles at a low frequency. .Iaddend. .Iadd.8. An optical recording method to form a tracking groove on an optical disc wherein a tracking groove is wobbled in the radial direction of the optical disc, said optical recording method comprising:   the steps of generating a recording beam from a recording beam generating means, deflecting said recording beam in the radial direction of the optical disc using light deflecting means, said light deflecting means being driven by a driving signal from driving means, the driving signal from said driving means being multiplexed with a first signal and with a second signal, the frequency of said first signal being higher than the frequency of said second signal;   and exposing the optical disc with said recording beam which moves in the radial direction of the optical disc; and   whereby the tracking groove has a width which is wider than the spot size of the recording beam which is formed on the optical disc and wherein said   
     
     
        tracking groove wobbles at said second frequency. .Iaddend. .Iadd.9.  An optical recording method according to claim 8, wherein said first signal is about 5 MHz and said second signal is about 22.5 KHz. .Iaddend. 
     
     
        .Iadd.  .  An optical recording method to form a tracking groove on an optical disc, wherein the tracking groove is wobbled in the radial direction of the optical disc, said optical recording method comprising: the steps of generating a recording beam from a recording beam generating means, deflecting said recording beam in the radial direction of the optical disc using light deflecting means, said light deflecting means being driven by a driving means, the driving signal from said driving means being multiplexed with a first signal having a first frequency and with a second signal having a second frequency, the period of said first signal being shorter than the period of said second signal; and   exposing the optical disc with said recording beam due to movement of said recording beam in the radial direction of the optical disc;   whereby the tracking groove has a width which is wider than the spot size of the recording beam which is formed on the optical disc, and wherein said tracking groove wobbles at said second frequency. .Iaddend.   
     
     
        .Iadd.     An optical recording apparatus to form a tracking groove onto an optically recordable disc, comprising: recording beam generating means for generating a recording beam having a predetermined spot size such as to form a pattern of a predetermined width onto the disc;   1ight deflecting means arranged on an optical path of said recording beam generating means; and   drive means for driving said light deflecting means, for reciprocatingly moving the recording beam in a radial direction of the disc at a high frequency, and for multiple exposing the disc by the recording beam due to the movement of the recording beam in said radial direction,   thereby a groove having a width wider than the pattern of said   
     
     
        predetermined width is formed. .Iaddend. .Iadd.12.  An apparatus according to claim 11, further comprising light modulating means arranged on said optical path, and thereby a discrete information pattern of said predetermined width is also formed. .Iaddend.