CN1142127A - Portable semiconductor laser pumping solid laser fingerprint presenting instrument - Google Patents
Portable semiconductor laser pumping solid laser fingerprint presenting instrument Download PDFInfo
- Publication number
- CN1142127A CN1142127A CN 95109209 CN95109209A CN1142127A CN 1142127 A CN1142127 A CN 1142127A CN 95109209 CN95109209 CN 95109209 CN 95109209 A CN95109209 A CN 95109209A CN 1142127 A CN1142127 A CN 1142127A
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- laser
- power supply
- semiconductor laser
- instrument
- fingerprint
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 27
- 239000007787 solid Substances 0.000 title claims abstract description 20
- 238000005086 pumping Methods 0.000 title claims abstract description 19
- 239000000126 substance Substances 0.000 claims abstract description 6
- 241000233855 Orchidaceae Species 0.000 claims description 4
- 238000011840 criminal investigation Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 241000219739 Lens Species 0.000 description 12
- 210000000695 crystalline len Anatomy 0.000 description 12
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Substances [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Landscapes
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention belongs to criminal investigation equipment, and relates to a portable semiconductor laser pump solid laser fingerprint presentation instrument. It is composed of a power supply and control part 1, a semiconductor laser pumped solid laser 2, a lens 3, a sample to be detected 4, an optical filter 5, an image observation and acquisition system 6 and chemicals 7. The semiconductor laser pumping blue, green and purple lasers or the direct emitting blue, green and purple laser semiconductor lasers are adopted, so that the weight of the instrument is greatly reduced, the instrument is not limited by external conditions by conveniently selecting a storage battery or a civil power supply, and a lot of convenience is brought to users in occasions without the civil power supply. The instrument has strong anti-interference capability, stable output power and high conversion efficiency, and is the most convenient tool for extracting the fingerprint of a potential criminal by public security personnel.
Description
The invention belongs to the criminal investigation equipment, relate to a kind of portable laser finger-print displaying instrument.
It is to utilize pulse laser to excite in certain chemical substance (as: R6G dyestuff) and the fingerprint sweat fluorescence of the another kind of material of formation after certain material effect and find or survey latent fingerprint that No. 4708882, U.S.'s patent of invention, name are called " utilizing laser and relevant apparatus to survey the method for fingerprint ".Because it selects for use pulse laser to make light source, so obtain high-quality fingerprint image, need select the control circuit synchronous for use with pulse laser, and make apparatus structure complexity and weight increase, therefore be not prone to a potential fingerprint of direct extraction, can only transfer to latent fingerprint on certain special sheet base and bring back to the laboratory and remove to present fingerprint.
It is laser print 100 finger-print displaying instruments of light source that U.S. omnichrome company has produced a kind of argon ion laser that adopts, it can directly take the scene of a crime to and extract potential fingerprint, but the scene must possess civilian power supply guarantees laser works, just can't extract potential fingerprint for the scene of a crime that does not have civilian power supply.Therefore, its applicable elements has limited its extensive use.
The objective of the invention is latent fingerprint to occur extracting in order to overcome above-mentioned instrument, perhaps can go out scene and the civilian power supply of needs or need the above shortcomings such as generator of 2000W, design a kind of solid laser finger-print displaying instrument of portable semiconductor laser pumping.
The present invention includes solid green laser device 2, lens 3, detected sample 4, filter 5, image observation and acquisition system 6, the chemicals 7 of power supply and control section 1, semiconductor laser pumping.The output of its power supply and control section 1 connects with semiconductor laser, temperature controller and temperature sensor in the solid state laser 2 of semiconductor laser pumping respectively, places lens 3, filter 5, image observation and acquisition system 6 respectively in the light path of the solid state laser 2 output laser of semiconductor laser pumping.Power supply in power supply and the control section 1 can adopt civilian power supply power supply or adopt storage battery directly to power for the solid state laser 2 of semiconductor laser pumping.
As follows below in conjunction with description of drawings:
Fig. 1 is a principle schematic of the present invention;
Fig. 2 is that the present invention adopts the green laser of semiconductor laser pumping to make an embodiment of lighting source.
As shown in Figure 1: semiconductor laser and temperature controller and Sensor section in the solid state laser 2 of power supply and control section 1 driving semiconductor laser pumping, and the solid state laser 2 of FEEDBACK CONTROL semiconductor laser pumping reaches the purpose that improves its antijamming capability and increase light-light transfer power.Ld pumping solid state laser 2 can adopt the orchid of single wavelength, green even purple laser, its outgoing beam wavelength is in the 250-550 nanometer range, power output is greater than 20 milliwatts, can also adopt the semiconductor laser of direct outgoing orchid, green or purple laser.Lens 3 can be positive lenss, it also can be negative lens, it is ld pumping solid state laser 2 emitting lasers to be expanded bundle form certain angle of divergence covering detected sample 4, when its typical angle of divergence selects the distance of lens 3 and detected sample 4 to be the 250mm left and right sides, the angle that the diameter of light beam is about about 50mm to be opened.Detected sample 4 is through forging document of handling of chemicals 7 or leaves the object of crime one's share of expenses for a joint undertaking latent fingerprint, and this latent fingerprint can be taken from the scene of a crime, also can be in the scene of a crime criminal with the object that touched and handled through chemicals 7.The laser of filter 5 single wavelength that to be eliminations sent by laser 2 and allow its excited fluorescent pass through.Image observation and acquisition system 6 are to extract or the fingerprint of the image that observation is formed by the fluorescence of laser excitation, and it can be to adopt camera collection and preservation, also can be to gather the special equipment that also directly send Computer Storage with CCD.
Fig. 2 is one embodiment of the present of invention.Power supply and control section 1 have two kinds of citation forms: a kind of is to convert the power source special and the control circuit part that can drive semiconductor laser to civilian electricity (for example 220V) to; Another kind is storage battery or the power supply and the control section of the portability scene of a crime that reaches unpowered power supply.The solid state laser 2 of semiconductor laser pumping is selected the structure of intracavity frequency doubling for use, and output wavelength is 532nm, power output＞40mW; Laser 2 and lens 3 are formed one, and cylindrical shape is convenient to hold, and its size is no more than the flashlight size of three batteries.Lens 3 are selected hemispherical lens for use, make its beam expander, and the typical angle of divergence is when selecting for use apart from lens 3 250mm, the about 50mm of beam diameter.Filter 5 is only selected for use the strong material that absorbs of 532nm laser, can see through filter 5 greater than the fluorescence of 532nm.For ease of people's observation and easy to use, filter 5 is a lens, makes the periscope shape that the diver uses.
Good effect of the present invention, since adopt the solid state laser of semiconductor laser pumping or respectively the semiconductor laser of outgoing orchid, green, purple laser as the light source of finger-print displaying instrument, and the solid state laser 2 of semiconductor laser pumping and lens 3 can constitute an integral body, typical sizes has only the flashlight size of three batteries, the total weight of the power source special of the battery feed of power supply and the civilian electricity of employing is no more than 10 kilograms, therefore the overall volume of finger-print displaying instrument greatly reduces, weight greatly alleviates, and brings great convenience to use.It not only can be provided in the laboratory and uses, and can arrive the scene of a crime of any environment, does not especially have the scene of a crime in the field of civilian power supply to extract potential fingerprint.
Claims (3)
1, a kind of solid laser finger-print displaying instrument of semiconductor laser pumping, it comprises test sample 4 and chemicals 7, it is characterized in that: the output of power supply and control section 1 connects with semiconductor laser, temperature controller and temperature sensor in the semiconductor pumped solid state laser 2 respectively, places lens 3, filter 5 and image observation and acquisition system 6 respectively in the light path of the solid state laser 2 output laser of semiconductor laser pumping.
2, finger-print displaying instrument according to claim 1 is characterized in that: power supply and control section 1 can be to adopt the power source special of civilian power supply power supply or adopt battery-driven power source special and control circuit.
3, finger-print displaying instrument according to claim 1 is characterized in that: orchid, green, the purple laser of the solid state laser 2 output single wavelengths of semiconductor laser pumping, its outgoing beam wave-length coverage is 250～550 nanometers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95109209 CN1142127A (en) | 1995-07-31 | 1995-07-31 | Portable semiconductor laser pumping solid laser fingerprint presenting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95109209 CN1142127A (en) | 1995-07-31 | 1995-07-31 | Portable semiconductor laser pumping solid laser fingerprint presenting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1142127A true CN1142127A (en) | 1997-02-05 |
Family
ID=5077070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95109209 Pending CN1142127A (en) | 1995-07-31 | 1995-07-31 | Portable semiconductor laser pumping solid laser fingerprint presenting instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1142127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105989616A (en) * | 2015-02-10 | 2016-10-05 | 口碑控股有限公司 | Method of acquiring concerned degree of object and apparatus thereof |
-
1995
- 1995-07-31 CN CN 95109209 patent/CN1142127A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105989616A (en) * | 2015-02-10 | 2016-10-05 | 口碑控股有限公司 | Method of acquiring concerned degree of object and apparatus thereof |
| CN105989616B (en) * | 2015-02-10 | 2020-02-18 | 口碑控股有限公司 | Method and device for acquiring attention degree of object |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |