Determination of recording power of radiation beam for recording information onto recording medium

1. A method for determining a recording power of a radiation beam for recording information onto a recording medium by an optical drive operated at a user-desired recording speed, said method comprising the steps of:

(a) determining an optimum recording power corresponding to each of a plurality test speeds being operated, respectively;

(b) generating a function of speed based on a relationship between the optimum recording power and the corresponding test speed;

(c) calculating said recording power of the user-desired recording speed by applying said user-desired recording speed in said function of speed; and

(d) recording the information onto the recording medium by substantially maintaining and applying said recording power when the optical drive is operated at said user-desired recording speed.

2. The method of claim 1 , between step (b) and step (c), further comprising the step of:

(b1) judging whether the user-desired speed is equal to any of the plurality of test speeds;

(b2) if the user-desired speed is not equal to any of the plurality of test speeds then performing step(c); and

(b3) otherwise setting the recording power of the user-desired speed as the optimum recording power of a corresponding test speed equal to the user-desired speed and not performing step (c).

3. The method of claim 2 , wherein the user-desired speed is faster than all of the plurality of test speeds.

4. The method of claim 1 , wherein step (a) comprising:

(a1) recording information onto the recording medium while varying a predetermined recording power;

(a2) receiving a radiation beam reflected from the recording medium during step (a1);

(a3) analyzing the reflected radiation beam to estimate effect of recording information under operation of the test speed being operated; and

(a4) changing the predetermined recording power and repeating steps (a1) through (a3) until the optimum recording power of the corresponding test speed is determined.

5. The method claim 4 , wherein said function of speed is a polynomial function of at least two orders.

6. The method of claim 4 , wherein said function of speed is an exponential function.

7. The method of claim 4 , wherein said function of speed is generated by a curve-fitting program.

8. An information recording/reproducing apparatus capable of determining a recording power of a radiation beam for recording information onto a recording medium by an optical drive operated at a user-desired speed, said apparatus comprising:

a recording processing device comprising a radiation generating circuit for recording information onto the recording medium;

a retrieving processing device comprising a radiation detector for receiving the radiation beam reflected from the recording medium during recording information;

a controller, connected to said recording processing device and said retrieving processing device, for determining an optimum recording power corresponding to each of a plurality of test speeds being operated by analyzing the reflected radiation beam to estimate effect of recording information, the controller further fitting the corresponding optimum recording powers versus the plurality of test speeds to generate a function of speed; and

a determining device, connected to said controller, for calculating the recording power of the user-defined speed by applying the user-desired speed in the function of speed;

wherein said apparatus records the information onto the recording medium by substantially maintaining and applying said recording power when the optical drive is operational at said user-desired speed.

9. The information recording/reproducing apparatus of claim 8 , wherein the user-desired speed is faster than all of the plurality of test speeds.

10. The information recording/reproducing apparatus of claim 8 , wherein the determining device also judges whether said user-desired speed is equal to any of the plurality of test speeds, and if the user-desired speed is equal to a corresponding test speed then the controller sets the recording power of the user-desired speed as the optimum recording power of the corresponding test speed and skips applying the user-desired speed in the function of speed.

11. The information recording/reproducing apparatus of claim 10 , wherein said function of speed is a polynomial function of at least two orders.

12. The information recording/reproducing apparatus of claim 10 , wherein said function of speed is an exponential function.

13. The information recording/reproducing apparatus of claim 10 , wherein said function of speed is generated by a curve-fitting program.