| 摘要 |
<p>An optical transmitter having a radius (ro) of 0.45 ± 0.1 mm and made of a graded index plastic, wherein a refractive index distribution within the range of at least 0.2 ro to 0.8 ro exhibits a distribution approximate to an optimum quadratic curve which makes a mode dispersion minimum. It has a demodulation transfer factor, which represents resolution, of at least 60 %, and is suitable for image transfer in a copying machine, a facsimile, an image sensor, etc. The present invention relates also to a method of producing an optical transmitter obtained by removing a predetermined amount of the outer periphery of a graded index type optical transmitter preform.</p> |
