CA1124063A - Method and apparatus for detection and analysis of fingerprints - Google Patents
Method and apparatus for detection and analysis of fingerprintsInfo
- Publication number
- CA1124063A CA1124063A CA354,225A CA354225A CA1124063A CA 1124063 A CA1124063 A CA 1124063A CA 354225 A CA354225 A CA 354225A CA 1124063 A CA1124063 A CA 1124063A
- Authority
- CA
- Canada
- Prior art keywords
- test subject
- light
- fingerprints
- detection
- analysis
- 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.)
- Expired
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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Public Health (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Veterinary Medicine (AREA)
- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
T I T L E
.
METHOD AND APPARATUS FOR DETECTION AND ANALYSIS
OF FINGERPRINTS
I N V E N T O R S
Paul R. Carey John E. Watkin Virginia R. Salares ABSTRACT OF DISCLOSURE
A method of detection and analysis of fingerprints and similar subjects comprising projecting a beam of filtered light from an indium lamp onto the test subject and optically examining it either directly or by means of an optical system.
The preferred method additionally comprises treating the test subject with NBD chloride to enhance the luminescence.
.
METHOD AND APPARATUS FOR DETECTION AND ANALYSIS
OF FINGERPRINTS
I N V E N T O R S
Paul R. Carey John E. Watkin Virginia R. Salares ABSTRACT OF DISCLOSURE
A method of detection and analysis of fingerprints and similar subjects comprising projecting a beam of filtered light from an indium lamp onto the test subject and optically examining it either directly or by means of an optical system.
The preferred method additionally comprises treating the test subject with NBD chloride to enhance the luminescence.
Description
This invention relates to a method and apparat;s for detection and analysis of fingerprints.-~ ingerprint ana~ysis has long ~een usedin criminal investigation work. The standard method of enchancement of the ridge contour lines ol the fingerprints at the present time is the use of a sui~able dusting powder.
~ecently it has been suggested that laser excited luminescence from fingerprints offered a sensitive, non-invasive means of latent fingerprin~ detection. The use of lasers ~or this purpose is limited by the high costs of suitable lasers and the lack of portability - they cannot readily be taken to the scene of a crime.
It is an object of the present invention to provide a method and apparatus for the detection and analysis of fingerprints that is re3ative1y inexpensive, portable, rugged, non-invasive, and highly sensitive.
. .~ .
This and other objects of the invention are ; achieved by a method o~ detection and analysis of ~ingerprints and similar subjects comprising projecting a beam of filtered light from an indium lamp onko the tes~ subject and optically examining i-t either direc1:ly or by means of an optica] system.
The preferred method additionall~ cOJnprises treating the test subject wi~h NBD chloride to enhance the luminescence.
In drawings which illustrate an embodiment of the invention, Figure l is a cross-sectional view of the device in reading pcsition.
Referrlng to figure l, an indium lamp made up of quartz tube lO having a central cavity ll f illed with a gas mixture of argon, mercury vapour, and indium iodide with the latter being the actlve matexial. Electrical leads 12 pass from ele~rodes lj to an external supply source. The . ~,~;,.
Device operates in the 400 watt po~er level ranye and needs connection only to standard 110 ~-olt power source. The light from the source (primary focus) is reflected by elliptical mirror 1-~ and is projected through lens 15 to focus on a primary blue filter 16 (secondary focus which filters out light aboye 500 nm. A beam of light at a wavelength of 451 : nano-metres ~nm) impinges on the test print 17 and the resultant emitted light at a wavelenyth of about 540 nm is observ~d : through a secondary yellow filter 18 which filter out light below 500 nm by the observer 19. Observation can be made by eye or camera or vidicon directly or through a suitable microscope ~`; (not shown).
:~ The print may be studies directly with little or no treatment and some useful information can often be obtained. It has been ~ound however that only about one-fifth o~ the population tested giYe weakly luminescent finger-~- prints with the rest being undectable. It is pre~erred therefore to enhance the luminescence by a chemical reaction which maXes some of the kno~n ~om~onents o~ the fingerprint deposits fluorescent. The most effective materi~1 for this i NBD chloride (7-chloro-4-~-nitro~enzo-2-ox~3--;, 3 diazole~.
, . . .
; The NBD chloride is dissolved in a suitable so'~ent (e.g. absolute ethanol~ and diluted ~ith dried - fluorisol ~1,1,2-~richloro-trifluoroethane). ~his solution - is sprayed onto the test subject using an atomizer. Other methods of ap,llcation can be used.
:, ~,.
_~_
~ecently it has been suggested that laser excited luminescence from fingerprints offered a sensitive, non-invasive means of latent fingerprin~ detection. The use of lasers ~or this purpose is limited by the high costs of suitable lasers and the lack of portability - they cannot readily be taken to the scene of a crime.
It is an object of the present invention to provide a method and apparatus for the detection and analysis of fingerprints that is re3ative1y inexpensive, portable, rugged, non-invasive, and highly sensitive.
. .~ .
This and other objects of the invention are ; achieved by a method o~ detection and analysis of ~ingerprints and similar subjects comprising projecting a beam of filtered light from an indium lamp onko the tes~ subject and optically examining i-t either direc1:ly or by means of an optica] system.
The preferred method additionall~ cOJnprises treating the test subject wi~h NBD chloride to enhance the luminescence.
In drawings which illustrate an embodiment of the invention, Figure l is a cross-sectional view of the device in reading pcsition.
Referrlng to figure l, an indium lamp made up of quartz tube lO having a central cavity ll f illed with a gas mixture of argon, mercury vapour, and indium iodide with the latter being the actlve matexial. Electrical leads 12 pass from ele~rodes lj to an external supply source. The . ~,~;,.
Device operates in the 400 watt po~er level ranye and needs connection only to standard 110 ~-olt power source. The light from the source (primary focus) is reflected by elliptical mirror 1-~ and is projected through lens 15 to focus on a primary blue filter 16 (secondary focus which filters out light aboye 500 nm. A beam of light at a wavelength of 451 : nano-metres ~nm) impinges on the test print 17 and the resultant emitted light at a wavelenyth of about 540 nm is observ~d : through a secondary yellow filter 18 which filter out light below 500 nm by the observer 19. Observation can be made by eye or camera or vidicon directly or through a suitable microscope ~`; (not shown).
:~ The print may be studies directly with little or no treatment and some useful information can often be obtained. It has been ~ound however that only about one-fifth o~ the population tested giYe weakly luminescent finger-~- prints with the rest being undectable. It is pre~erred therefore to enhance the luminescence by a chemical reaction which maXes some of the kno~n ~om~onents o~ the fingerprint deposits fluorescent. The most effective materi~1 for this i NBD chloride (7-chloro-4-~-nitro~enzo-2-ox~3--;, 3 diazole~.
, . . .
; The NBD chloride is dissolved in a suitable so'~ent (e.g. absolute ethanol~ and diluted ~ith dried - fluorisol ~1,1,2-~richloro-trifluoroethane). ~his solution - is sprayed onto the test subject using an atomizer. Other methods of ap,llcation can be used.
:, ~,.
_~_
Claims (5)
1. A method of detection and analysis of fingerprints and similar subjects comprising projecting a beam or filtered light from an indium lamp onto the test subject and examining the subject optically.
2. A method as in claim 1 further comprising pre-treating the test subject with a solution of a substance capable of chemically reacting with material in the test subject to make the latter fluorescent and thus enhance luminescence.
3. A method as in claim 2 wherein the pre-treating is carried out by applying a solution of NBD chloride to the test subject.
4. Apparatus for detection and analysis of fingerprints and similar subjects comprising:
a) an indium lamp primary focus source radiating light at about 451 nm, D) a mirror positioned in relation to the lamp to reflect light to a secondary focus position, c) a lens positioned at the secondary focus to project a beam of light towards a test subject, d) a blue filter positioned in the light beam path between the lens and the test subject to filter out light above 500 nm, e) mounting means positioned in the light beam path for holding the test subject such that light emitted from the test subject is directed towards an observing position, and, f) a yellow filter positioned in the path of the emitted light to filter out light below 500nm.
a) an indium lamp primary focus source radiating light at about 451 nm, D) a mirror positioned in relation to the lamp to reflect light to a secondary focus position, c) a lens positioned at the secondary focus to project a beam of light towards a test subject, d) a blue filter positioned in the light beam path between the lens and the test subject to filter out light above 500 nm, e) mounting means positioned in the light beam path for holding the test subject such that light emitted from the test subject is directed towards an observing position, and, f) a yellow filter positioned in the path of the emitted light to filter out light below 500nm.
5. Apparatus as in claim 4 wherein the mirror has an elliptical curvature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA354,225A CA1124063A (en) | 1980-06-10 | 1980-06-10 | Method and apparatus for detection and analysis of fingerprints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA354,225A CA1124063A (en) | 1980-06-10 | 1980-06-10 | Method and apparatus for detection and analysis of fingerprints |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1124063A true CA1124063A (en) | 1982-05-25 |
Family
ID=4117204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA354,225A Expired CA1124063A (en) | 1980-06-10 | 1980-06-10 | Method and apparatus for detection and analysis of fingerprints |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1124063A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0188758A2 (en) * | 1984-12-27 | 1986-07-30 | Kawasaki Steel Corporation | A method for detecting fingerprints using a laser |
| FR2600433A1 (en) * | 1986-06-20 | 1987-12-24 | Zozaya Leonie | Method for revealing finger prints on any paper support or any other similar support by combining a chemical process and a scanning light (photonic) exposure |
| CN111767893A (en) * | 2018-02-06 | 2020-10-13 | 深圳市汇顶科技股份有限公司 | Under-screen biological feature recognition device and electronic equipment |
-
1980
- 1980-06-10 CA CA354,225A patent/CA1124063A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0188758A2 (en) * | 1984-12-27 | 1986-07-30 | Kawasaki Steel Corporation | A method for detecting fingerprints using a laser |
| EP0188758A3 (en) * | 1984-12-27 | 1987-06-24 | Kawasaki Steel Corporation | A method for detecting fingerprints using a laser and an apparatus therefor |
| FR2600433A1 (en) * | 1986-06-20 | 1987-12-24 | Zozaya Leonie | Method for revealing finger prints on any paper support or any other similar support by combining a chemical process and a scanning light (photonic) exposure |
| CN111767893A (en) * | 2018-02-06 | 2020-10-13 | 深圳市汇顶科技股份有限公司 | Under-screen biological feature recognition device and electronic equipment |
| US11501555B2 (en) | 2018-02-06 | 2022-11-15 | Shenzhen GOODIX Technology Co., Ltd. | Under-screen biometric identification apparatus and electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1100276C (en) | Robust spectroscopic optical probe | |
| AU692092B2 (en) | Inspection of optical components | |
| CA1192962A (en) | Reflected light measuring apparatus | |
| KR890001981B1 (en) | Device for detecting fingerprint by using razor | |
| Bramble et al. | Ultraviolet luminescence from latent fingerprints | |
| US5399866A (en) | Optical system for detection of signal in fluorescent immunoassay | |
| CA2285189A1 (en) | A system for acquiring an image of a multi-phase fluid by measuring backscattered light | |
| JPH10503288A (en) | Diode laser pump linear cavity laser system for long and sensitive gas detection by intracavity laser spectroscopy (ILS) | |
| WO1989008841A1 (en) | Improved motility scanner and method | |
| EP0312293A3 (en) | Sensing device for analysis | |
| CN108303405A (en) | A kind of transmission-type Multi-example optical fiber sensing system based on mobile device | |
| JPS6312940A (en) | Optical fiber device and method of measuring parameter by said device | |
| DE3582120D1 (en) | INFRARED SPECTROPHOTOMETRIC DEVICE. | |
| CA1124063A (en) | Method and apparatus for detection and analysis of fingerprints | |
| EP0930497A3 (en) | Optical density measuring apparatus | |
| AU585466B2 (en) | Method and apparatus for distinguishing photoluminescent and reflecting surfaces in forensic science applications | |
| CN205485034U (en) | Coaxial camera of laser | |
| WO2020171652A2 (en) | Real-time underwater particle-sensing system using bubbles | |
| JPH10281979A (en) | Light measuring device and method of preventing its contamination | |
| Omasa et al. | Image instrumentation of chlorophyll a fluorescence for diagnosing photosynthetic injury | |
| US6383816B1 (en) | Probing of surface roughness | |
| US5926270A (en) | System and method for the remote detection of organic material in ice in situ | |
| US5485269A (en) | System for minimizing native fiber fluorescence variations in fiber optic sensors | |
| US20030175821A1 (en) | Apparatus and method for microscopic comet assay | |
| JP2002538460A (en) | All-fiber optical module for photochemical sensor systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |