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US 7,009,784 B2Granted
Imaging optical system and electronic apparatus using the same
AssigneeOlympus Corporation
InventorTakahiro Amanai
Life of this patent
Estimating the term…
Abstract
The image forming optical system of the present invention comprises, in order from an object side, a first lens which is meniscus lens having positive refracting power and a concave surface directed toward an object side, an aperture stop, a second lens having positive refracting power and a convex surface directed toward the object side, a third lens which is meniscus lens having negative refracting power and a convex surface directed toward an image side, and a fourth lens having positive refracting power.
Claims11
An image forming optical system comprising:
- in order from an object side,
- a first lens which is meniscus lens having positive refracting power and a concave surface directed toward an object side,
- an aperture stop,
- a second lens having positive refracting power and a convex surface directed toward the object side,
- a third lens which is meniscus lens having negative refracting power and a convex surface directed toward an image side, and
- a fourth lens having positive refracting power.
3 more elements
Dependencies are inferred from the claim text.