CN105527258A - Method for fast undamaged development of sweat and fingerprint on paper - Google Patents
Method for fast undamaged development of sweat and fingerprint on paper Download PDFInfo
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- CN105527258A CN105527258A CN201410579271.7A CN201410579271A CN105527258A CN 105527258 A CN105527258 A CN 105527258A CN 201410579271 A CN201410579271 A CN 201410579271A CN 105527258 A CN105527258 A CN 105527258A
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Abstract
The invention relates to a method for fast undamaged development of sweat and fingerprint on a paper. The method comprises carrying out infrared thermal radiation treatment on a paper to be detected, irradiating the paper through laser, observing sweat or fingerprint cases at a laser irradiation position through filter glasses preventing laser penetration and taking a picture for the laser irradiated part through a camera with a filter lens so that the sweat or fingerprint on paper is developed. Compared with the prior art, the method provided by the invention uses simple and easily available equipment and apparatuses and realizes fast development of fingerprints on a paper without chemical treatment. The infrared thermal radiation treatment process utilizes a portable suitcase-type infrared thermal radiation treatment device of papers and the infrared thermal radiation treatment device is portable. A laser irradiation device, the filter glasses and the camera are easily available and portable. The method is a fast undamaged treatment method. The paper treated through the method does not produce color change and does not get additional substances. The method does not influence traditional physical and chemical development. The developed fingerprint has clear lines and large background color difference and can be observed and shot easily.
Description
Technical field
The present invention relates to a kind of image visualization method, especially relate to sweat fingerprint quick nondestructive process for show on a kind of paper.
Background technology
Criminal policeman's part needs to manifest the sweat of the fibrous face such as copy paper, newspaper, magazine, napkin paper, coil paper, toilet paper, filter paper, carton, carton and impression of the hand often, extracts evidence.At present conventional method is generally and uses powder to manifest medicament or chemical agent manifests, this processing mode needs with medicament etc. is operated on the one hand, there is the risk destroyed and be loaded with the carrier of sweat fingerprint, on the other hand, this processing mode requires very high to the operative technique of operating personnel, and what need is chronic, and the material such as reagent, instrument needed is not easy to carry, and is generally unfavorable for onsite application.Simultaneously traditional process for show is higher to the carrier media being loaded with sweat fingerprint, and general outmoded impression of the hand or sweat are difficult to manifest or manifest accuracy to be reduced greatly.
Summary of the invention
Object of the present invention be exactly provide a kind of simple, convenient operation, accuracy high to overcome defect that above-mentioned prior art exists paper on sweat fingerprint quick nondestructive process for show.
Object of the present invention can be achieved through the following technical solutions:
Sweat fingerprint quick nondestructive process for show on a kind of paper, comprises the following steps:
(1) treat detection paper and carry out infrared emanation process;
(2) paper is irradiated with laser;
(3) sweat or impression of the hand situation by stoping the filter goggle of laser light to observe laser irradiating position;
(4) with the camera that optical filtering is housed laser irradiating part divided and take pictures, make sweat or fingerprint displaying on paper.
When carrying out infrared emanation process, temperature controls at 175 ~ 185 DEG C, to the heat treatment time 8 ~ 12s of sheet-fed, extends to 20 ~ 120s to the heat treatment time of the thicker material such as carton, carton.
To the paper after infrared emanation process, after needing to bring gloves, take out paper, then carry out lower continuous operation.
When paper is heat-treated, infrared emanation process is carried out to the two sides of paper simultaneously.
When irradiating white paper with laser, the laser that wavelength is 445nm is used to irradiate.
To yellow paper, directly use 365nm Ultraviolet radiation, i.e. the sweat of observable laser irradiating position or impression of the hand situation.
When carrying out laser irradiation, laser flashlight is used to irradiate, its laser tube power >=4000mw.
The wavelength coverage of described filter goggle cut-off is 430-470nm, allows more than 510nm long-pass.
The wavelength coverage of described optical filtering cut-off is 430-470nm, allows more than 510nm long-pass.
Know-why of the present invention is: sweat is except the inorganics such as water and chloride, and also having the organic substances such as amino acid, is that crestal line sweat fingerprint or sebum sweat fingerprint are all like this.With certain wavelength far-infrared radiation appropriate time of specified temp, under 445nm laser irradiates, amino acid in sweat can produce the intense fluorescence that wavelength is greater than optical maser wavelength, wear the special filter goggle (the cut-off degree of depth of General Requirements laser wavelength is at more than OD2) stoping laser light, namely can be observed impression of the hand, camera lens is loaded onto special optical filtering and just can take sweat fingerprint.For sweat fingerprint on yellow carton, because fluorescence color is close with carton color after above-mentioned process, disturb the observation of fluorescence impression of the hand, available 365nm ultraviolet electric torch direct irradiation observes impression of the hand.
Compared with prior art, the present invention has the following advantages and beneficial effect:
(1) equipment and instrument required for the present invention is simple and easy to get, without the need to any chemical treatment, potential impression of the hand on paper can be manifested fast: wherein, carrying out infrared emanation process can adopt suitcase type paper infrared emanation processing instrument to carry out, portable, the equipment such as laser irradiation, filter goggle, camera are all easy to get, and portable.
(2) manifest process side's quick nondestructive, can complete for 10 ~ 15 seconds and manifest process, be particularly suitable for the fast processing of a large amount of sample.
(3) method of the present invention is fast aobvious lossless process method, and the paper processed is without colour-change phenomena, and without added substance, do not affect traditional physics and chemistry and manifest, the impression of the hand after manifesting, streakline is clear, large with background color difference, is easy to observe and take pictures.
(4) outmoded impression of the hand (reaching a year) can be manifested, and after manifesting, can not passing in time and weakening.
(5) method of the present invention is except for except the paper sweat fingerprint of infrared emanation process, can also search site be used for, show seminal stain, urine, sweat, fiber, saliva, oil stain, bone, manifest not good sweat fingerprint etc. through indenes diketone or triketohydrindene hydrate etc.
Accompanying drawing explanation
Fig. 1 be embodiment shooting obtain manifest photo.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
Sweat fingerprint quick nondestructive process for show on paper, comprises the following steps:
(1) treat detection paper and carry out infrared emanation process, temperature controls at 175 ~ 185 DEG C, to the heat treatment time 8 ~ 12s of sheet-fed, extends to 20 ~ 120s to the heat treatment time of the thicker material such as carton, carton; And need to carry out infrared emanation process to the two sides of paper simultaneously.
(2) paper is taken out after needing to bring gloves, laser flashlight is used to carry out irradiation paper, its laser tube power >=4000mw, when irradiating white paper with laser, the laser that wavelength is 445nm is used to irradiate, to yellow paper, directly use 365nm Ultraviolet radiation, i.e. the sweat of observable laser irradiating position or impression of the hand situation
(3) sweat or impression of the hand situation by stoping the filter goggle of laser light to observe laser irradiating position;
(4) with the camera that optical filtering is housed laser irradiating part divided and take pictures, make sweat or fingerprint displaying on paper.
In step (3) or (4), the wavelength coverage of filter goggle cut-off is 430-470nm, allows more than 510nm long-pass.The wavelength coverage of optical filtering cut-off is 430-470nm, allows more than 510nm long-pass.
By the paper after said method process, its fingerprint displaying situation is shown in Fig. 1.
Above-mentioned is can understand and use invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.
Claims (8)
1. a sweat fingerprint quick nondestructive process for show on paper, is characterized in that, comprise the following steps:
(1) treat detection paper and carry out infrared emanation process;
(2) paper is irradiated with laser;
(3) sweat or impression of the hand situation by stoping the filter goggle of laser light to observe laser irradiating position;
(4) with the camera that optical filtering is housed laser irradiating part divided and take pictures, make sweat or fingerprint displaying on paper.
2. sweat fingerprint quick nondestructive process for show on a kind of paper according to claim 1, it is characterized in that, when carrying out infrared emanation process, temperature controls at 175 ~ 185 DEG C, to the heat treatment time 8 ~ 12s of sheet-fed, 20 ~ 120s is extended to the heat treatment time of carton, carton.
3. sweat fingerprint quick nondestructive process for show on a kind of paper according to claim 1, is characterized in that, when heat-treating paper, carries out infrared emanation process to the two sides of paper simultaneously.
4. sweat fingerprint quick nondestructive process for show on a kind of paper according to claim 1, is characterized in that, when irradiating white paper with laser, uses the laser that wavelength is 445nm to irradiate.
5. sweat fingerprint quick nondestructive process for show on a kind of paper according to claim 1, is characterized in that, to yellow paper, directly uses 365nm Ultraviolet radiation, i.e. the sweat of observable laser irradiating position or impression of the hand situation.
6. sweat fingerprint quick nondestructive process for show on a kind of paper according to claim 1, is characterized in that, when carrying out laser irradiation, uses laser flashlight to irradiate, its laser tube power >=4000mw.
7. sweat fingerprint quick nondestructive process for show on a kind of paper according to claim 1, is characterized in that, the wavelength coverage of described filter goggle cut-off is 430-470nm, allows more than 510nm long-pass.
8. sweat fingerprint quick nondestructive process for show on a kind of paper according to claim 1, is characterized in that, the wavelength coverage of described optical filtering cut-off is 430-470nm, allows more than 510nm long-pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579271.7A CN105527258A (en) | 2014-10-24 | 2014-10-24 | Method for fast undamaged development of sweat and fingerprint on paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579271.7A CN105527258A (en) | 2014-10-24 | 2014-10-24 | Method for fast undamaged development of sweat and fingerprint on paper |
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| CN105527258A true CN105527258A (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410579271.7A Pending CN105527258A (en) | 2014-10-24 | 2014-10-24 | Method for fast undamaged development of sweat and fingerprint on paper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802292A (en) * | 2017-01-22 | 2017-06-06 | 苏州晓松科技开发有限公司 | A kind of method for manifesting permeability object biological evidence vestige |
Citations (4)
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|---|---|---|---|---|
| EP0188758A2 (en) * | 1984-12-27 | 1986-07-30 | Kawasaki Steel Corporation | A method for detecting fingerprints using a laser |
| CN202104921U (en) * | 2011-04-18 | 2012-01-11 | 裴浩 | Trace-showing laser torch |
| CN203182912U (en) * | 2013-04-28 | 2013-09-11 | 李刚 | Portable fast handprint fuming device occupying little space |
| CN203720095U (en) * | 2014-01-06 | 2014-07-16 | 罗顿 | Infrared thermal radiation image acquisition system for sweat fingerprint on paper |
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2014
- 2014-10-24 CN CN201410579271.7A patent/CN105527258A/en active Pending
Patent Citations (4)
| 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 |
| CN202104921U (en) * | 2011-04-18 | 2012-01-11 | 裴浩 | Trace-showing laser torch |
| CN203182912U (en) * | 2013-04-28 | 2013-09-11 | 李刚 | Portable fast handprint fuming device occupying little space |
| CN203720095U (en) * | 2014-01-06 | 2014-07-16 | 罗顿 | Infrared thermal radiation image acquisition system for sweat fingerprint on paper |
Non-Patent Citations (4)
| Title |
|---|
| DOMINICK AJ, DAEID NN, BLEAV SM, ET AL.: "The Recoverability of Fingerprints on Paper Exposed to Elevated Temperatures Part 2: Natural Fluorescence", 《JOURNAL OF FORENSIC IDENTIFICATION》 * |
| 徐尉等: "TFD-2纸张手印快速显现系统的应用", 《刑事技术》 * |
| 齐宇颂: "纸张上汗潜手印的热显荧光反应研究", 《中国刑警学院学报》 * |
| 齐宇颂等: "纸张上汗潜手印的光学显现研究", 《广东公安科技》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802292A (en) * | 2017-01-22 | 2017-06-06 | 苏州晓松科技开发有限公司 | A kind of method for manifesting permeability object biological evidence vestige |
| CN106802292B (en) * | 2017-01-22 | 2019-07-02 | 苏州晓松科技开发有限公司 | A method of showing permeability object biological evidence trace |
| US11073476B2 (en) | 2017-01-22 | 2021-07-27 | Suzhou Xiaosong Science & Technology Development Co., Ltd | Method for developing biological trace evidence on porous object |
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Application publication date: 20160427 |
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