Solid State Imaging Techniques. A Study on the Advantages of Spatial-pixel-offset Method in Four-chip CCD Imaging.

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  • 特集　固体撮像とその関連技術　４板撮像方式における画素ずらし効果についての検討
  • 4バン サツゾウ ホウシキ ニ オケル ガソズ ラ シ コウカ ニ ツイテ ノ

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Abstract

A new image acquistion system is proposed to meet the increasing demand for a compact HDTV camera with high performance. The main idea of this system is to solve the contradiction between the shrinkage of the optical format size and the camera performance by equipping the camera with four-chip CCDs. In the newly developed color-separating system of the prototype camera, two of the four CCDs are assigned for the green light component and one each for the red and the blue component. We succeeded in improving the resolution by introducing spatial pixel offset imaging, in which the two G-CCDs are aligned by one-half pitch of a pixel and one of them is aligned with the R-CCD and the other with the B-CCD. This new method has two major advantages : it prevents the resolution degradation caused by the chromatic aberration of the lens and improves the resolution of chromatic signals over a wide range.

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