1. An optical recording medium comprising information recording layers capable of recording and reading by irradiation of laser light having a wavelength \u03bb of 400 to 410 nm through an optical system having a numerical aperture NA of 0.8 to 0.9, wherein the information recording layers include at least a read-only information recording layer having information recorded in advance and an information recording layer different from the read-only information recording layer, being capable of information recording of write-once or rewritable type, the read-only information recording layer being stacked closest to a light incident surface of the laser light.
2. The optical recording medium according to claim 1, wherein the information recording layers are stacked at distances beyond 60 \u03bcm from the light incident surface.
3. The optical recording medium according to claim 1, wherein the read-only information recording layer is stacked within 80 \u03bcm from the light incident surface.
4. The optical recording medium according to claim 2, wherein the read-only information recording layer is stacked within 80 \u03bcm from the light incident surface.
5. The optical recording medium according to claim 1, comprising three or more of the information recording layers.
6. The optical recording medium according to claim 2, comprising three or more of the information recording layers.
7. The optical recording medium according to claim 3, comprising three or more of the information recording layers.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for printing bars in a bar code with an inkjet printer, comprising:
computing a print resolution for printing a first bar according to the equation
First Print Resolution=(First Bar Width\u2212Dot Size)+(First Number of Dots\u22121)
where First Bar Width is a desired width of the first bar, Dot Size is the nominal diameter of each ink dot and First Number of Dots is the number of ink dots to be printed across the width of the first bar;
adjusting a spacing between ink dots across the width of the first bar based on the computed first print resolution;
computing a position of a first ink dot in a second bar according to the equation
First Dot Position=Last Dot Position+Bar Spacing+Dot Size
where Last Dot Position is the position of the center of the last ink dot in the first bar and Bar Spacing is the distance between the first and second bars;
adjusting a timing of a firing pulse for ejecting an ink drop for the first ink dot to position the first ink dot at the computed position;
computing a second print resolution for printing the second bar according to the equation
Second Print Resolution=(Second Bar Width\u2212Dot Size)+(Second Number of Dots\u22121)
where Second Bar Width is a desired width of the second bar, Dot Size is the nominal diameter of each ink dot and Second Number of Dots is the number of ink dots to be printed across the width of the second bar;
adjusting a spacing between ink dots across the width of the second bar based on the computed second print resolution;
printing the first bar; and
printing the second bar.
2. A processor readable medium having instructions for:
computing a first print resolution for printing a first bar according to the equation
First Print Resolution=(First Bar Width\u2212Dot Size)+(First Number of Dots\u22121)
where First Bar Width is a desired width of the first bar, Dot Size is the nominal diameter of each ink dot and First Number of Dots is the number of ink dots to be printed across the width of the first bar;
adjusting a spacing between ink dots on the print media printed across the width of the first bar based on the computed first print resolution;
computing a position of a first ink dot in a second bar according to the equation
First Dot Position=Last Dot Position+Bar Spacing+Dot Size
where Last Dot Postion is the position of the center of the last ink dot in the first bar and Bar Spacing is the distance between the first and second bars;
adjusting a timing of a firing pulse for ejecting an ink drop for the first ink dot to position the first ink dot at the computed position;
computing a second print resolution for printing the second bar according to the equation
Second Print Resolution=(Second Bar Width\u2212Dot Size)+(Second Number of Dots\u22121)
where Second Bar Width is the desired width of the second bar, Dot Size is the nominal diameter of each ink dot and Second Number of Dots is the number of ink dots to be printed across the width of the second bar; and
adjusting a spacing between ink dots across the width of the second bar based on the computed second print resolution.
3. A bar code, comprising:
a first bar comprising first dots having a first center to center spacing computed according to the equation
First Spacing=(First Bar Width\u2212First Dot Size)+(First Number of Dots\u22121)
where First Bar Width is a desired width of the first bar, First Dot Size is the nominal dimension of each of the first dots measured in a direction across the width of the first bar and First Number of Dots is the number of dots across the width of the first bar;
a second bar comprising second dots having a second center to center spacing computed according to the equation
Second Spacing=(Second Bar Width\u2212Second Dot Size)+(Second Number of Dots\u22121)
where Second Bar Width is a desired width of the second bar, Second Dot Size is the nominal dimension of each of the second dots measured in a direction across the width of the second bar and Second Number of Dots is the number of dots across the width of the second bar; and
the second bar including a first dot positioned according to the equation
First Dot Position=Last Dot Position+Bar Spacing+Second Dot Size
where Last Dot Position is the position of the center of the last dot in the first bar, Bar Spacing is the distance between the first and second bars, and Second Dot Size is the nominal dimension of each of the second dots measured in a direction across the width of the second bar.