| 摘要 |
An improved light-readable information recording medium is provided that comprises an optical data storage structure having lands and pits, in which the depth of the pits is about: <maths id="MATH-US-00001" num="00001"> <math overflow="scroll"> <mrow> <mrow> <mfrac> <mi>lambda</mi> <mrow> <mn>2</mn> <mo></mo> <mi>n</mi> </mrow> </mfrac> <mo></mo> <mfrac> <mi>m</mi> <mrow> <mn>1</mn> <mo>+</mo> <msubsup> <mi>M</mi> <mi>T</mi> <mn>2</mn> </msubsup> </mrow> </mfrac> </mrow> <mo>,</mo> </mrow> </math> </maths> wherein lambda is the wavelength of light used to read the information recording medium, m is the order of interference selected from a group consisting of odd integers, MT is the transverse magnification, and n is the refractive index encountered by the reading light inside the pits. The invention also provides an improved optical reading system with the parameters satisfying the relationship: <maths id="MATH-US-00002" num="00002"> <math overflow="scroll"> <mrow> <mrow> <mi>nd</mi> <mo>=</mo> <mrow> <mfrac> <mi>lambda</mi> <mrow> <mn>2</mn> <mo></mo> <mi>n</mi> </mrow> </mfrac> <mo></mo> <mfrac> <mi>m</mi> <mrow> <mn>1</mn> <mo>+</mo> <msubsup> <mi>M</mi> <mi>T</mi> <mn>2</mn> </msubsup> </mrow> </mfrac> </mrow> </mrow> <mo>,</mo> </mrow> </math> </maths> wherein lambda is the wavelength of light used to read the information recording medium, m is the order of interference selected from a group consisting of odd integers, MT is the transverse magnification, n is the refractive index encountered by the reading light inside the pits, and d is the depth of the pits.
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