Super Wide-Angle Lens
AssigneeKonica Minolta Opto, Inc.
InventorMasatoshi Hirose
Life of this patent
Estimating the term…
Abstract
A small-sized super wide-angle lens for a solid-state image sensor that is suitable for a digital input apparatus such as a monitoring camera and an onboard camera, which is excellent in terms of optical performance and is low in terms of cost. The super wide-angle lens includes, in order from an object side thereof: a first lens with a negative refractive power; a second lens with a negative refractive power; a third lens with a positive refractive power; and a fourth lens with a positive refractive power. The first lens is a meniscus lens including a convex surface facing the object side. Each of the second lens and the fourth lens includes at lest one rotational-asymmetric surface.
Claims7
A super wide-angle lens comprising, in order from an object side thereof:
- a first lens with a negative refractive power, being a meniscus lens comprising a convex surface facing the object side;
- a second lens with a negative refractive power;
- a third lens with a positive refractive power;
- and
- a fourth lens with a positive refractive power,
- wherein each of the second lens and the fourth lens comprises at lest one rotationally-asymmetric surface.
Dependencies are inferred from the claim text.