| 摘要 |
A lens comprises a single lens, both surfaces of the lens is a meniscus-shaped and aspheric lens, and side surface side thereof is a convex surface, and, when a refractive index of the lens is represented by n, a central thickness thereof is represented by t, a radius of curvature of a concave face thereof is represented by r1, the radius of curvature of the convex face thereof is represented by r2, and a focal length thereof is represented by f, the lens satisfies the following equations:
<math-cwu id="MATH-US-00001">
<number>1</number>
<math>
<mtable>
<mtr>
<mtd>
<mrow>
<mrow>
<mrow>
<mo>-</mo>
<mn>0.2</mn>
</mrow>
<mo><</mo>
<mstyle>
<mtext> </mtext>
</mstyle>
<mo>⁢</mo>
<mrow>
<mrow>
<mo>(</mo>
<mfrac>
<mrow>
<mi>n</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
<mi>r1</mi>
</mfrac>
<mo>)</mo>
</mrow>
<mo>/</mo>
<mi>f</mi>
</mrow>
<mo><</mo>
<mn>0</mn>
</mrow>
<mo>,</mo>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<mrow>
<mn>0.08</mn>
<mo><</mo>
<mstyle>
<mtext> </mtext>
</mstyle>
<mo>⁢</mo>
<mrow>
<mrow>
<mo>(</mo>
<mfrac>
<mrow>
<mn>1</mn>
<mo>-</mo>
<mi>n</mi>
</mrow>
<mi>r2</mi>
</mfrac>
<mo>)</mo>
</mrow>
<mo>/</mo>
<mi>f</mi>
</mrow>
<mo><</mo>
<mn>0.1</mn>
</mrow>
<mo>,</mo>
<mi>and</mi>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<mn>0.35</mn>
<mo><</mo>
<mstyle>
<mtext> </mtext>
</mstyle>
<mo>⁢</mo>
<mfrac>
<mi>t</mi>
<mi>f</mi>
</mfrac>
<mo><</mo>
<mrow>
<mn>0.55</mn>
<mo>.</mo>
</mrow>
</mrow>
</mtd>
</mtr>
</mtable>
</math>
<mathematica-file id="MATHEMATICA-00001" file="US20010003494A1-20010614-M00001.NB"/>
<image id="EMI-M00001" wi="216.027" he="59.05305" file="US20010003494A1-20010614-M00001.TIF" imf="TIFF" ti="MF"/>
</math-cwu>
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