CPC G02B 13/08 (2013.01) [G02B 9/60 (2013.01); G02B 13/0045 (2013.01)] | 15 Claims |
1. A lens, wherein
a first profile in a first direction intersecting an optical axis and a second profile in a second direction intersecting the optical axis are different from each other,
a length of the first profile in the first direction is different from a length of the second profile in the second direction,
0<|(fx−fy)/fx|<0.01 in which fx is a focal length of the lens calculated based on a radius of curvature of the first profile, and fy is a focal length of the lens calculated based on a radius of curvature of the second profile, and
wherein 0.2<|(Rx1−Ry1)/Rx2|<2.0 in which Rx1 is a radius of curvature of an object-side surface of the first profile, Ry1 is a radius of curvature of an object-side surface of the second profile, and Rx2 is a radius of curvature of an image-side surface of the first profile.
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