US 7,583,310 B2 · Taking apparatus

Abstract

The present invention concerns an imaging apparatus which works for size reductions, power savings, the efficient attainment of the quantity of light sensed, and prevention of contrast decreases due to a diffraction phenomenon, is well fit for the taking and appreciation of common still pictures, and comprises a taking lens and electronic imaging device combination that takes full advantage of the characteristics of an imaging device. The imaging apparatus comprises a taking optical system, and an electronic imaging device which is located on an image side of said taking optical system, includes an imaging plane I with a plurality of two-dimensionally arranged light sensors, and is adapted to convert an image formed through said imaging optical system into electrical signals. In at least one taking state, the apparatus satisfies at the same time condition (1) about relations of the area of the entrance pupil to the focal length of the taking optical system, condition (2) about the number of effective pixels of the imaging plane, condition (3) about the effective area of the imaging plane, and condition (4) about the division of the effective area of the imaging plane by the number of effective pixels.

Claims13

Dependent claims

A taking apparatus, comprising a taking optical system and an electronic imaging device which is located on an image side of said taking optical system, includes an imaging plane with a plurality of two-dimensionally arranged light sensors, and is adapted to convert an image formed through said taking optical system into electrical signals, wherein the following conditions (1), (2), (3) and (4) are at the same time satisfied in at least one taking state:

1/2.8>(Se/π)1/2/f>1/4.4 (1)
2.2×106<N<13×106 (2)
5.5 mm2<Si<32 mm2 (3)
2×10−6 mm2<Si/N<16×10−6 mm2 (4)
where:
Se is an area of an entrance pupil of the taking optical system in at least one taking state,
f is a focal length of the taking optical system in said at least one taking state,
N is a number of effective pixels of the imaging plane in said at least one taking state, and
Si is a effective area of the imaging plane in said at least one taking state.

6 more elements

A taking apparatus, comprising a taking optical system, and an electronic imaging device which is located on an image side of said taking optical system, includes an imaging plane with a plurality of two-dimensionally arranged light sensors, and is adapted to convert an image formed through said taking optical system into electrical signals, wherein the following conditions (2), (3), (4), (5) and (6) are satisfied at the same time in at least one taking state:

1/1.4>Φemax/f>1/2.2 (5)
0.6<Φemin/Φemax≦1 (6)
2.2×106<N<13×106 (2)
5.5 mm2<Si<32 mm2 (3)
2×10−6 mm2<Si/N<16×10−6 mm2 (4)
where, given a horizontal direction defined by a long-side direction and a vertical direction defined by a short-side direction of an effective imaging area of said imaging plane,
Φemax is a length of an entrance pupil in the longer of the horizontal and vertical directions,
Φemin is a length of an entrance pupil in the shorter of the horizontal and vertical directions,
f is a focal length of the taking optical system in said at least one taking state,
N is a number of effective pixels of said imaging plane in said at least one taking state, and
Si is a effective area of said imaging plane in said at least one taking state.

8 more elements

Dependencies are inferred from the claim text.

Taking apparatus

Life of this patent

Taking apparatus

Life of this patent

Abstract

Claims13