Fisheye lens

Details Fisheye lens Fisheye lens

2008-12-23

2011-11-22

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S755000

Reexamination Certificate

active

08064149

ABSTRACT:
Disclosed is a fisheye lens comprised of the first through the seventh lens elements: wherein a field of view is larger than 180° a calibrated distortion is 10% or less, a relative illumination is 80% or more, all the refractive surfaces of the lens elements are spherical surfaces, the first lens element is a negative meniscus lens element having a convex surface facing an object side, the second lens element is a bi-concave lens element, the third lens element is a positive meniscus lens element having a convex surface facing an image side, a stop is located between the third and the fourth lens elements, the fourth lens element is a bi-convex lens element, the fifth lens element is a bi-concave lens element, the sixth and the seventh lens elements are bi-convex lens elements.

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