FINGER VEIN IMAGE INPUTTING DEVICE AND APPARATUS USING THE SAME
First Claim
1. A finger vein image inputting device comprising:
- a band pass filter for transmitting the light of a specific wavelength;
a light source provided adjacently to the band pass filter for applying light to a finger placed over the band pass filter;
an imaging section for generating a finger vein image by receiving light that is applied from the light source, diffused in the finger, transmitted through the finger, and transmitted through the band pass filter; and
a gradient index lens having refractive-index distribution around an optical axis provided between the band pass filter and the imaging section.
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Accused Products
Abstract
There is a need for providing a finger vein image inputting device that can miniaturize and thin a finger vein authentication apparatus and provide high authentication accuracy. The finger vein image inputting device according to the present invention includes a body, a band pass filter for transmitting only light of a specific wavelength, a light source for applying light to a finger placed over the band pass filter, and an imaging means for imaging transmitted light from the finger. A gradient index lens is provided between the band pass filter and the imaging means and causes refractive-index distribution around an optical axis. A polarizing filter is provided at least one of between the light source and the finger and between the finger and an imaging device.
8 Citations
24 Claims
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1. A finger vein image inputting device comprising:
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a band pass filter for transmitting the light of a specific wavelength; a light source provided adjacently to the band pass filter for applying light to a finger placed over the band pass filter; an imaging section for generating a finger vein image by receiving light that is applied from the light source, diffused in the finger, transmitted through the finger, and transmitted through the band pass filter; and a gradient index lens having refractive-index distribution around an optical axis provided between the band pass filter and the imaging section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification