Image pickup optical system
First Claim
1. An image pickup optical system for forming a light flux from an object into an optical image on an image pickup element, the image pickup optical system consisting of, in order from an object side thereof:
- a first lens with a negative power in a meniscus shape including a convex surface facing the object side;
a second lens in a biconcave shape;
a third lens with a positive power including a convex surface facing an image surface side; and
a fourth lens with a positive power including a convex surface facing the image surface side,wherein the first lens and the third lens are glass lenses and the second lens and the fourth lens are plastic lenses.
1 Assignment
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Accused Products
Abstract
An image pickup optical system for forming a light flux from an object into an optical image on an image pickup element, is provided with, in order from an object side thereof: a first lens with a negative power in a meniscus shape including a convex surface facing the object side; a second lens in a bioconcave shape; a third lens with a positive power including a convex surface facing an image surface side; and a fourth lens with a positive power including a convex surface facing the image surface side. The first lens and the third lens are glass lenses and the second lens and the fourth lens are plastic lenses.
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Citations
4 Claims
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1. An image pickup optical system for forming a light flux from an object into an optical image on an image pickup element, the image pickup optical system consisting of, in order from an object side thereof:
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a first lens with a negative power in a meniscus shape including a convex surface facing the object side; a second lens in a biconcave shape; a third lens with a positive power including a convex surface facing an image surface side; and a fourth lens with a positive power including a convex surface facing the image surface side, wherein the first lens and the third lens are glass lenses and the second lens and the fourth lens are plastic lenses. - View Dependent Claims (2, 3, 4)
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Specification