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4 | <head><!--#set var="title" value="Saba Telerama: Schmitt lenses" |
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8 | --><!--#set var="title_de" value="Schmitt-Optik" |
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18 | <meta name="t29.SVN" content="$Id: saba-telerama.php 257 2012-05-28 13:01:21Z sven $" /> |
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29 | <div class="box center"> |
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30 | <img src="/shared/photos/kommunikationstechnik/telerama-schmitt-optik.jpg" alt="Telerama-Schmitt-Optik" width="574" height="356" /> |
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31 | <div class="bildtext-bildbreite" style="width: 574px;"> |
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32 | <p>The <b>Schmitt lenses</b>, demounted from the Saba Telerama projection TV-set. |
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33 | </div> |
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34 | </div> |
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35 | |
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36 | <p> |
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37 | The CRT (6 cm diameter) is partly visible in the pice. The light |
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38 | coming from this tube caroms on the concave mirror (in the picture laying on |
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39 | the floor). Afterwards it is adjusted by an special lens (on the right of the |
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40 | box) and leaves the box, arriving at the projection screen. |
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41 | <br />During this long way the original picture which is about |
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42 | 4,5cm x 3,5cm big is scaled up to 123cm x 97,5cm on the |
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43 | projection screen. Consequently, the luminosity is decreasing enormously. |
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44 | If you compute the final fraction of the original luminosity, you'll |
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45 | understand, why this projection TV had to be set in a totally shaded room.</p> |
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