| 摘要 |
A plastic rod lens formed in a cylindrical shape with a radius R so that a refraction factor np is gradually reduced from its center axis toward its outer peripheral part. The plastic rod lens fulfills the following requirements (1) to (3). (1) 43 = 0.01 (In the expressions above, n1, n0, nA, and nB represent the outer peripheral part, center, refraction factor nD at any point A, and refraction factor nD at any point B of the plastic rod lens, respectively, and W1, WA, and WB represent the outer peripheral part, Abbe's number W at any point A, and Abbe's number W at any point B of the plastic rod lens, respectively.) ® KIPO & WIPO 2008
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