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US 7,623,305 B2Granted
Image capturing lens and imaging apparatus
AssigneeSony Corporation
InventorNobuyuki Adachi
Life of this patent
Estimating the term…
Abstract
An image capturing lens including: in order from an object side, a first lens group having a negative refractive power; a stop; and a second lens group having a positive refractive power; the first lens group including, in order from the object side, a first lens in a meniscus shape having a convex surface which faces the object side and a negative refractive power, and a second lens in a meniscus shape having a convex surface which faces the object side and a positive refractive power, and the second lens group including, in order from the object side, a third lens in a double-convex shape having a positive refractive power, a fourth lens in a double-concave shape having a negative refractive power, and a fifth lens having a positive refractive power.
Claims6
An image capturing lens comprising:
- in order from an object side, a first lens group having a negative refractive power;
- a stop;
- and
- a second lens group having a positive refractive power;
- said first lens group including, in order from the object side, a first lens in a meniscus shape having a convex surface which faces the object side and having a negative refractive power, and a second lens in a meniscus shape having a convex surface which faces the object side and having a positive refractive power, and
- said second lens group including, in order from the object side, a third lens in a double-convex shape having a positive refractive power, a fourth lens in a double-concave shape having a negative refractive power, and a fifth lens having a positive refractive power;
- wherein 0.9<f3/f<1.7,
- where f denotes an overall focal length of said image capturing lens, and f3 denotes a focal length of said third lens of the second lens group.
5 more elements
An imaging apparatus comprising:
- an image capturing lens;
- and
- an image pickup device configured to convert an optical image formed by the image capturing lens into an electric signal;
- wherein said image capturing lens includes, in order from an object side, a first lens group having a negative refractive power and a second lens group having a positive refractive power,
- said first lens group includes, in order from an object side, a first lens in a meniscus shape having a convex surface which faces the object side and having a negative refractive power, and a second lens in a meniscus shape having a convex surface which faces the object side and having a positive refractive power, and
- said second lens group including, in order from the object side, a third lens in a double-convex shape having a positive refractive power, a fourth lens in a double-concave shape having a negative refractive power, and a fifth lens having a positive refractive power;
- wherein 0.9<f3/f<1.7,
- where f denotes an overall focal length of said image capturing lens, and f3 denotes a focal length of said third lens of the second lens group.
5 more elements
An image capturing lens comprising:
- in order from an object side, a first lens group having a negative refractive power;
- a stop;
- and
- a second lens group having a positive refractive power;
- said first lens group including, in order from the object side, a first lens in a meniscus shape having a convex surface which faces the object side and having a negative refractive power, and a second lens in a meniscus shape having a convex surface which faces the object side and having a positive refractive power, and
- said second lens group including, in order from the object side, a third lens in a double-convex shape having a positive refractive power, a fourth lens in a double-concave shape having a negative refractive power, and a fifth lens having a positive refractive power;
- wherein 1.4<|F1/F2|<2.5,
- where F1 denotes a composite focal length of said first lens group, and F2 denotes a composite focal length of said second lens group.
5 more elements
An imaging apparatus comprising:
- an image capturing lens;
- and
- an image pickup device configured to convert an optical image formed by the image capturing lens into an electric signal;
- wherein said image capturing lens includes, in order from an object side, a first lens group having a negative refractive power and a second lens group having a positive refractive power,
- said first lens group includes, in order from an object side, a first lens in a meniscus shape having a convex surface which faces the object side and having a negative refractive power, and a second lens in a meniscus shape having a convex surface which faces the object side and having a positive refractive power, and
- said second lens group including, in order from the object side, a third lens in a double-convex shape having a positive refractive power, a fourth lens in a double-concave shape having a negative refractive power, and a fifth lens having a positive refractive power;
- wherein 1.4<|F1/F2|<2.5,
- where F1 denotes a composite focal length of said first lens group, and F2 denotes a composite focal length of said second lens group.
5 more elements
Dependencies are inferred from the claim text.