| US 7,612,950 B2 | ||
| Aspheric plastic lens and mold for manufacturing the same | ||
| Young Ho Lee, Yongin-si (Korea, Republic of); Kwang Yun Choi, Uiwang-si (Korea, Republic of); and Jin Su Seok, Suwon-si (Korea, Republic of) | ||
| Assigned to Samsung Electro-Mechanics Co., Ltd., Gyunggi-Do (China) | ||
| Filed on Feb. 27, 2007, as Appl. No. 11/679,717. | ||
| Claims priority of application No. 10-2006-0044284 (KR), filed on May 17, 2006. | ||
| Prior Publication US 2007/0268599 A1, Nov. 22, 2007 | ||
| Int. Cl. G02B 13/18 (2006.01) | ||
| U.S. Cl. 359—718 [359/724] | 7 Claims |
| 1. An aspheric plastic lens comprising:
a spherical surface portion having upper and lower portions at the center thereof, the upper and lower portions having curved
surfaces with a different curvature, respectively;
a rib formed in a circular plate shape so as to extend from the peripheral edge of the spherical surface portion to the outside,
the rib having burrs formed to project on the edges of the upper and lower surfaces thereof; and
a pair of two-stage step portions formed on the upper and lower surfaces of the rib, the two-stage step portions being formed
symmetrically with each other, a first step portion and a second step portion having a buff formed to project thereon, the
first step portion being formed at a depth larger than that of the buff projecting on the second step portion.
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