JPS6446172A - Image input device - Google Patents
Image input deviceInfo
- Publication number
- JPS6446172A JPS6446172A JP62202733A JP20273387A JPS6446172A JP S6446172 A JPS6446172 A JP S6446172A JP 62202733 A JP62202733 A JP 62202733A JP 20273387 A JP20273387 A JP 20273387A JP S6446172 A JPS6446172 A JP S6446172A
- Authority
- JP
- Japan
- Prior art keywords
- swelled
- lines
- fingerprint
- liquid
- image
- 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.)
- Pending
Links
Abstract
PURPOSE:To satisfy optical conditions in order to obtain a distinct image by giving appropriate moisture to the swelled lines of a fingerprint and bringing those swelled lines into contact with a reflecting surface when the fingerprint is obtained by means of the permeability of a porous material. CONSTITUTION:A porous material 101 contains a liquid and is supported by a holder 108 and also pressed by a packing 110. A finger 102 is put on a mounting surface 104 and the appropriate moisture is given to the surfaces of the swelled lines of the finger 102 by the permeability of the material 101 and owing to a capillary phenomenon. Thus close contact is secured between the surface 104 and the swelled lines of the fingerprint. Then an image obtained by optical boundary conditions produced on the surface 104 by light given from a light source 106 is acquired by an image pickup device 107. As a result, a distinct gradation image is obtained owing to said optical boundary conditions. Furthermore, a supply part 112 is provided to store a liquid 111 and therefore the liquid 111 permeates into the material 101 and supplied at all times.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62202733A JPS6446172A (en) | 1987-08-14 | 1987-08-14 | Image input device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62202733A JPS6446172A (en) | 1987-08-14 | 1987-08-14 | Image input device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6446172A true JPS6446172A (en) | 1989-02-20 |
Family
ID=16462262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62202733A Pending JPS6446172A (en) | 1987-08-14 | 1987-08-14 | Image input device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6446172A (en) |
-
1987
- 1987-08-14 JP JP62202733A patent/JPS6446172A/en active Pending
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