The Making of an HDTV Lens - PBS
The Making of an HDTV Lens - PBS
The Making of an HDTV Lens - PBS
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Resolution <strong>of</strong> a 1/2-inch <strong>HDTV</strong> <strong>Lens</strong><br />
• 1/2-Inch Format<br />
3.92 mm<br />
6.97 mm<br />
1/2-Inch<br />
Image<br />
Format<br />
1080 Lines<br />
= 540 Lp/mm<br />
• 1080-line sc<strong>an</strong>ning c<strong>an</strong> unambiguously resolve 540 black <strong>an</strong>d white<br />
cycles (or Line Pairs)<br />
• 540 LP within a vertical image height <strong>of</strong> 3.92 mm me<strong>an</strong>s that the<br />
HD lens must be capable <strong>of</strong> tr<strong>an</strong>sferring 540 / 3.92 = 138 Line Pairs<br />
per millimeter (LP/mm) with as high contrast as possible
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