Lens for image pickup
AssigneesSatoshi Do, Milestone Co., Ltd.
InventorSatoshi Do
Life of this patent
Estimating the term…
Abstract
A lens for image pickup is provided in which various aberrations are corrected satisfactorily, the optical length is at maximum approximately 6 mm, and moreover a sufficient back focus is secured. This lens for image pickup comprises a first lens, an aperture diaphragm, and a second lens, positioned in this order from the object side toward the image side. The first lens is a resin lens with a meniscus shape, with the convex surface facing the object side, and having positive refractive power. The second lens is a resin lens with a meniscus shape, with the convex surface facing the image side, and having positive refractive power.
Claims6
A lens for image pickup, having a first lens L1, aperture diaphragm S1 and second lens L2, configured with the first lens L1, aperture diaphragm S1 and second lens L2 positioned in order from the object side toward the image side;
- and wherein
- the first lens L1 is a resin lens having a meniscus shape with the convex surface facing the object side, and having positive refractive power;
- the second lens L2 is a resin lens having a meniscus shape with the convex surface facing the image side, and having positive refractive power;
- and,
- the distance in air from the object-side incident surface of said first lens to the image plane is, at maximum, 6 millimeters.
Dependencies are inferred from the claim text.