Simplified analysis of the readout waveform for an elliptical mark.
A simplified equation for the readout waveform from an elliptical mark is analytically derived and confirmed. This approach approximates the elliptical mark by using an equivalent mark with the width of a δ function and an equivalent readout beam spot. The equation is verified by comparison with precise numerical calculations. Good agreement is obtained with the practical dimensions of optical recording. The equation determines the characteristics of the readout waveform in terms of the dimensions of the elliptical mark.
Tanabe
T
T
Tanaka
Y
Y
Arai
R
R