Image capturing unit and image capturing device
First Claim
1. An image capturing unit comprising:
- a variable optical element;
an optical unit which is disposed on a light-incident end of the variable optical element; and
a light-flux limiting section, whereinthe variable optical element includes a first liquid member, a second liquid member which does not mix in the first liquid member, and a container which contains the first liquid member and the second liquid member;
an interfacial shape between the first liquid member and the second liquid member varies according to a voltage which is applied to the liquid members; and
the light-influx limiting section satisfies a following condition (1);
0.1<
(Φ
−
2×
h)<
20.0
(1)where Φ
(mm) indicates a maximum diameter for an axial light-flux in the variable optical element and h (mm) indicates a highest position of the axial light-flux on the light-incident end of the variable optical element.
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Accused Products
Abstract
An image capturing unit comprises a variable optical element, an optical unit, and a light-flux limiting section. The variable optical element includes a first liquid member, a second liquid member, and a container which contains the first liquid member and the second liquid member. An interfacial shape between the first liquid member and the second liquid member varies according to a voltage which is applied to the liquid members. The light-influx limiting section satisfies following condition
0.1<(Φ−2×h)<20.0
where Φ (mm) indicates a maximum diameter for an axial light-flux in the variable optical element and h (mm) indicates a highest position of the axial light-flux on the light-incident end of the variable optical element. By doing this, it is possible to restrict a flare light and a ghost light and prevent impurities in the liquid members from being observed in the captured image.
69 Citations
12 Claims
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1. An image capturing unit comprising:
-
a variable optical element; an optical unit which is disposed on a light-incident end of the variable optical element; and a light-flux limiting section, wherein the variable optical element includes a first liquid member, a second liquid member which does not mix in the first liquid member, and a container which contains the first liquid member and the second liquid member; an interfacial shape between the first liquid member and the second liquid member varies according to a voltage which is applied to the liquid members; and the light-influx limiting section satisfies a following condition (1);
0.1<
(Φ
−
2×
h)<
20.0
(1)where Φ
(mm) indicates a maximum diameter for an axial light-flux in the variable optical element and h (mm) indicates a highest position of the axial light-flux on the light-incident end of the variable optical element.- View Dependent Claims (2, 3, 9, 10, 11, 12)
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4. An image capturing unit comprising:
-
a variable optical element; and an optical unit which is disposed on a light-incident end of the variable optical element, wherein the variable optical elements comprises a first liquid member, a second liquid member which does not mix in the first liquid member, a container which contains the first liquid member and the second liquid member, and an aperture member having aperture sections on both end in which diameters in the aperture sections are different; the aperture section having a small diameter in the aperture member is disposed near the light-incident end; an interfacial shape between the first liquid member and the second liquid member varies according to a voltage which is applied to the liquid members; and
satisfies following conditions (2) and (3);
0.1<
(Φ
1−
2×
h1)<
20.0
(2)
0.1<
(Φ
2−
2×
h2)<
20.0
(3)where Φ
1 (mm) indicates a diameter for a small aperture section in the aperture member, Φ
2 (mm) indicates a diameter for a large aperture section in the aperture member, h1 (mm) indicates a highest position of the axial light-flux on the light-incident end of the variable optical element, and h2 (mm) indicates a highest position of the axial light-flux on the interface between the first liquid member and the second liquid member.
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5. An image capturing unit comprising:
-
a variable optical element; and a light-flux limiting section, wherein the variable optical element includes a first liquid member, a second liquid member which does not mix in the first liquid member, and a container which contains the first liquid member and the second liquid member; an interfacial shape between the first liquid member and the second liquid member varies according to a voltage which is applied to the liquid members; and the light-influx limiting section satisfies a following condition (4)
0.5<
S<
20.0
(4)where S (mm2) indicates an area for a light flux having a maximum perspective on the light-incident end of the variable optical element. - View Dependent Claims (6)
-
-
7. An image capturing unit comprising:
-
a variable optical element; and an image capturing element, wherein the variable optical element includes a first liquid member, a second liquid member which does not mix in the first liquid member, and a container which contains the first liquid member and the second liquid member; an interfacial shape between the first liquid member and the second liquid member varies according to a voltage which is applied to the liquid members; and an absolute value for R12-d is in a range between 10% and 500% of a length d (mm);
where R12 indicates a diameter of a curvature of the interface, and d indicates a length for an optical path length of an axial principal light between the interface and a surface of the image capturing element. - View Dependent Claims (8)
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Specification