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<p><strong>Canon still working on Foveon Technology
</strong>Canon has been working on 3 layer Foveon sensor technology for a while now, it still hasn’t appeared in a camera and we haven’t heard anything to say it will. However, the fact they continue to spend resources on it, tells us there is definitely a good application for the technology.</p>
<p><strong>Patent Publication No. 2013-93553 (Google Translated)</strong></p>
<ul>
<li>Publication date 2013.5.16</li>
<li>Filing date 2011.10.4</li>
</ul>
<p><strong>Imaging element of three-layer structure</strong></p>
<ul>
<li>Photodiode deep layer (hereinafter, PD) in the charge is diffused into the substrate</li>
<li>Thus sensitivity is poor red</li>
</ul>
<p><strong>Canon patent</strong></p>
<ul>
<li>I as a photonic crystal of irregular shape, the boundary surface of the PD of red or green,</li>
<li>In the periodic structure of uneven spacing, less than twice the 1/4 times or more the wavelength of light, or I shall be two times or less 1/2 times or more</li>
<li>Irregular shape has the properties to be spatially-localized or resonant light</li>
<li>The incident light is diffracted, it combines with the light of the boundary plane, the resonant</li>
<li>Prolonged exists than normal, the light becomes easy to be absorbed by the PD Thus</li>
</ul>
<p><strong>Source: [<a href="http://egami.blog.so-net.ne.jp/2013-05-22" target="_blank">EG</a>]</strong></p>
<p><strong><span style="color: #ff0000;">c</span>r</strong></p>
