| 发明名称 |
Large-Field-Of-View Lens System For Capsule Endoscope And Capsule Endoscope Having Large-Field-Of-View Lens System |
| 摘要 |
A lens system and a for a capsule endoscope includes a first lens having a concave aspheric surface having a radius R2 and a second lens having a convex aspheric surface having a radius R3 facing the first lens. A third lens has a convex aspheric surface having radius R6. The lens system satisfies the following conditions: (1) R2/Gap>1 and ABS(R3/R2)>1.28; (2) 1<ABS(R6/R2)<1.1 and R6<0; and (3) V2<V1 and V2<V3; wherein: i) Gap is a distance from a center of curvature of the concave aspheric surface of the first lens to a center of curvature of the convex aspheric surface of the second lens; (ii) ABS denotes absolute value; and (iii) V1 is an Abbe number of the first lens, V2 is an Abbe number of the second lens, and V3 is an Abbe number of the third lens. |
| 申请公布号 |
US2014128673(A1) |
申请公布日期 |
2014.05.08 |
| 申请号 |
US201213671350 |
申请日期 |
2012.11.07 |
| 申请人 |
OMNIVISION TECHNOLOGIES, INC. |
发明人 |
CHENG TING-YU |
| 分类号 |
A61B1/00;A61B1/04;G02B3/02 |
主分类号 |
A61B1/00 |
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