JPS5469300A - Apparatus for taking finger mark - Google Patents

Apparatus for taking finger mark

Info

Publication number
JPS5469300A
JPS5469300A JP13705277A JP13705277A JPS5469300A JP S5469300 A JPS5469300 A JP S5469300A JP 13705277 A JP13705277 A JP 13705277A JP 13705277 A JP13705277 A JP 13705277A JP S5469300 A JPS5469300 A JP S5469300A
Authority
JP
Japan
Prior art keywords
reflection
light beam
finger
light
projected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP13705277A
Other languages
Japanese (ja)
Other versions
JPS61100B2 (en
Inventor
Hiroki Ikeda
Hiroshi Asai
Mitsuto Sakaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13705277A priority Critical patent/JPS5469300A/en
Publication of JPS5469300A publication Critical patent/JPS5469300A/en
Publication of JPS61100B2 publication Critical patent/JPS61100B2/ja
Granted legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
    • A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting

Abstract

PURPOSE:To provide an apparatus capable of taking definite finger marks simply by putting fingers on a glass plate and detecting optical change on a boundary surface on the opposite side of the surface to which pre-polarized light beam is projected, through polarizing filters, as change in the beam of reflected light. CONSTITUTION:Light beam 30 polarized by polarizing filter 3 is projected on detection surface 7 of glass plate 4 with a proper incident angle. Air layer 12 is formed in recessed portion 9 on the surface of finger, and it is as if there is no finger on the glass plate 4, so that light beam 30 is reflected as reflection light beam 42, without causing any deflection. At a projection 10 of the finger, on the other hand, reflection factor is lowered at detection surface 7, and light beam projected to moisture layer 11 is also reflected on the surface 8 of finger. The reflection light 41, however, is made irregular by the disturbance to polarization due to irregular reflection and interference caused by the moisture layer 11, and quantity of light is reduced. Resultantly, reflection light beam 50 is obtained through polarizing filter 5 disposed perpendicularly to the reflection light beam 42, light at the portion corresponding to the recess 9 on the surface 8 of finger and dark at the portion corresponding to the projection 10. In the above arrangement, if reflection preventing film is applied on surface 6 for preventing reflection on light 32, change in polarization can be detected more distinctly.
JP13705277A 1977-11-14 1977-11-14 Apparatus for taking finger mark Granted JPS5469300A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13705277A JPS5469300A (en) 1977-11-14 1977-11-14 Apparatus for taking finger mark

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13705277A JPS5469300A (en) 1977-11-14 1977-11-14 Apparatus for taking finger mark

Publications (2)

Publication Number Publication Date
JPS5469300A true JPS5469300A (en) 1979-06-04
JPS61100B2 JPS61100B2 (en) 1986-01-06

Family

ID=15189743

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13705277A Granted JPS5469300A (en) 1977-11-14 1977-11-14 Apparatus for taking finger mark

Country Status (1)

Country Link
JP (1) JPS5469300A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5737071A (en) * 1996-08-16 1998-04-07 Identicator Corporation Method and apparatus for enhancing live-scan fingerprint reader images

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5737071A (en) * 1996-08-16 1998-04-07 Identicator Corporation Method and apparatus for enhancing live-scan fingerprint reader images

Also Published As

Publication number Publication date
JPS61100B2 (en) 1986-01-06

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