Eye image pickup device
First Claim
1. An eye image pickup device for obtaining an eye image of a person, comprising:
- an object lens;
an image pickup unit;
a marker provided coaxially along a light axis of an optical pickup system for obtaining the eye image; and
a light guide unit for guiding visible light to said object lens on the route of a pickup light path, wherein the visible light is emitted by a visible light source, wherein said marker is located nearer said object lens than said light guide unit, and a center of said light guide unit is coincident with the light axis so that the person can see both said light guide unit and said marker.
1 Assignment
0 Petitions
Accused Products
Abstract
An eye image pickup device includes an object lens; an image pickup element, such as a CCD serving as an image pickup unit; a light shielding portion; and a light guide unit. The light shielding portion shielding one part of the pickup light path is coaxially positioned along a light axis of an optical image pickup system. The light guide unit guides visible light on the route of the guide light path leading to the object lens. A cross section of the guided visible light is similar to that of the light shielding portion, and the center of the visible light is coincident with the light axis. The cross-sectional area of the visible light is set substantially equal to or slightly larger than the effective cross sectional area of the light shielding portion with respect to the optical image pickup system along the light path.
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Citations
12 Claims
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1. An eye image pickup device for obtaining an eye image of a person, comprising:
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an object lens;
an image pickup unit;
a marker provided coaxially along a light axis of an optical pickup system for obtaining the eye image; and
a light guide unit for guiding visible light to said object lens on the route of a pickup light path, wherein the visible light is emitted by a visible light source, wherein said marker is located nearer said object lens than said light guide unit, and a center of said light guide unit is coincident with the light axis so that the person can see both said light guide unit and said marker. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
an infrared light illumination unit; and
a visible light shielding filter, wherein an object is illuminated by said illumination unit, and wherein said visible light shielding filter is positioned between said image pickup unit and a position where the visible light is guided, and said visible light shielding filter shields the visible light guided into said image pickup unit.
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Specification