| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical lens which prevents a weld-line from occurring over an operation zone in the optical lens having an eccentric thickness shape incorporated to an projection type projector. <P>SOLUTION: The optical lens 10 is composed of a lens part 1 provided with an optically functional surface 1A and a flange 2 formed on the outer periphery thereof and has such an unequal thickness shape that the thickness of lens center of the lens part 1 is thin and the thickness of lens outer periphery thereof is thick, wherein a circumference part of the lateral side with respect to a gate part 3 formed on arrangement position of a resin injection port is molded into a cut-off shape. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
