OPTICAL ELEMENT, AND IMAGING UNIT, IMAGING APPARATUS, RADIATION IMAGE SENSOR AND FINGERPRINT COLLATOR WHICH USE THE SAME

Title:

OPTICAL ELEMENT, AND IMAGING UNIT, IMAGING APPARATUS, RADIATION IMAGE SENSOR AND FINGERPRINT COLLATOR WHICH USE THE SAME

Document Type and Number:

WIPO Patent Application WO/1999/006862

Kind Code:

A1

Abstract:

An optical element (10) which comprises as shown in the Figure an input optical member (11) molded to a unitary body by arranging a plurality of optical fibers (14) in parallel with each other, an intermediate optical member (12), and an output optical member (13), wherein the input optical member (11) has incident and emergent surfaces (11a, 11b) which are cut at 31° and 90° respectively with respect to an optical axis, the intermediate optical member (12) has incident and emergent surfaces (12a, 12b) which are cut at 66° respectively with respect to an optical axis, the output optical member (13) has incident and emergent surfaces (13a, 13b) which are cut at 31° and 90° respectively with respect to an optical axis, and the emergent surface (11b) of the input optical member (11) and the incident surface (12a) of the intermediate optical member (12), and the emergent surface (12b) of the intermediate optical member (12) and the incident surface (13a) of the output optical member (13) are in contact with each other respectively.

Inventors:

SUGAWARA TAKEO (JP)
SUZUKI MAKOTO (JP)
KATO MASAYOSHI (JP)

Application Number:

PCT/JP1998/003394

Publication Date:

February 11, 1999

Filing Date:

July 30, 1998

Export Citation:

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Assignee:

HAMAMATSU PHOTONICS KK (JP)
SUGAWARA TAKEO (JP)
SUZUKI MAKOTO (JP)
KATO MASAYOSHI (JP)

International Classes:

G02B6/06; G02B6/08; G02B6/26; G06K9/00; G02B6/42; (IPC1-7): G02B6/06; G06T1/00; G01T1/00

Foreign References:

JPH08286048A	1996-11-01
JPH0943439A	1997-02-14
JPH0651142A	1994-02-25
JPH02249537A	1990-10-05
JPH08315143A	1996-11-29

Other References: