CN202599838U - Portable multi-wave-band combination light source mark check meter - Google Patents
Portable multi-wave-band combination light source mark check meter Download PDFInfo
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- CN202599838U CN202599838U CN201220180149.9U CN201220180149U CN202599838U CN 202599838 U CN202599838 U CN 202599838U CN 201220180149 U CN201220180149 U CN 201220180149U CN 202599838 U CN202599838 U CN 202599838U
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Abstract
The utility model relates to a portable multi-wave-band combination light source mark check meter which comprises a shell with a dark chamber, light sources and a filtering sheet, wherein the longitudinal cross section of the shell is of an isosceles trapezoid shape; multi-wave-band combination light sources formed by LEDs (light-emitting diode) are uniformly distributed in a 360-degree mode in the circular truncated cone enclosed dark chamber of the shell; the upper opening of the shell is provided with a rotary cylinder of a combined-type multi-layer filtering sheet insertion groove; an adaptive interface of an imaging device is arranged above the rotary cylinder; the shell, the rotary cylinder and the adaptive interface form an integral portable seal-type structure; and the multi-wave-band combination light sources are connected with an electric control unit. The portable multi-wave-band combination light source mark check meter has the beneficial effects that the circular truncated cone seal-type portable device adopts the self-closing dark box multi-wave-band combination light sources and a dodging device; a multi-wave-band receiving filtering mirror and a near infrared imaging system are arranged on a spectrum section; and any single page documents, filed documents, filed marks and the like are imaged and discovered rapidly through spectrum section exchange by a controller.
Description
Technical field
The utility model belongs to the check meter that judicial expertise is used, and relates in particular to a kind of criminal case crime scene that is applied to and reconnoitres the portable multi-band combined light source document trace check meter of identifying with criminal, civil material evidence.
Background technology
In the real work of investigation organ, intelligence agency, judicial expertise mechanism; Run into the situation that with the naked eye can't pick out the material evidence essential characteristic through regular meeting; Increased difficulty for investigation evidence obtaining work and evaluation work, therefore the Ministry of Public Security organizes literary composition/trace check meter of developing and having purchased various ways for many years.There is following some deficiency in present literary composition/trace check meter: the one, and volume is big, generally all is placed in the laboratory and works, and goes out to execute the task and can't carry; The 2nd, requirement censorship file all is a single page usually, meets the folder file, must take folder by force apart; The 3rd, with camera imaging, image shows on screen, can not the real-time storage view data, but carry out screenshot capture on computers, imaging resolution is lower.(application number: 201020507761.3) disclose a kind of portable remote ultraviolet ray search light source; Solve existing ultraviolet light source since effectively luminous range less than 10m; Can not carry out the problem of long-range search; This ultraviolet ray search light source has been installed a cross section around ultraviolet lamp tube in the housing of a ultraviolet lamp tube that can excite 200-400nm ultraviolet gas lamp be parabolical bowl type reflective mirror; Make ultraviolet lamp tube in the range of exposures of 0-20m, can effectively excite vestige fluorescence, make the material evidence camera take out the visual photo of human eye, so that this potential vestige is identified; In addition; All electric components of this ultraviolet ray search light source all are installed in the compact housing, and are easy to use, are easy to carry; Be fit to be applied to fields such as uv photography, photofulorography, reconnoitre vestiges such as search, the conventional finger mark line of harmless extraction for criminal scene convenience is provided.(application number: 99204539.8) disclose a kind of portable multi-band light wave tuner and related to the criminal investigation technology, be applicable to the criminal investigation alternative light source that the inspection of the scene of a crime and laboratory examination of material evidence are used.Purpose is to improve the multiband light harmonic tuning device that the portable lamp of potential vestige discovery rate of criminal case and extraction ratio is used more.Tuner comprises the adjustment button, spectral coverage index dial, interference filter, interference filter plate rail, fine setting swash plate, fine setting button and last item.Simple in structure, easy to use, total P/C ratio is high, and has improved potential vestige discovery rate of criminal case and extraction ratio.Above-mentioned patent both can be that literary composition inspection laboratory is conventional uses, and also can carry out using easily, particularly to the corresponding improvement with sensitivity of spectral detection scope of instrument, thereby had significantly improved the detectability and the test effect of instrument.Along with development in science and technology, judicial department demands urgently developing and a kind ofly can improve potential vestige discovery rate of criminal case and extraction ratio, satisfies the inspection of the scene of a crime and the laboratory examination of material evidence Wen trace check meter with the portable multi-band combined light source of criminal investigation alternative light source demand.
The utility model content
The purpose of the utility model is to overcome the deficiency of above-mentioned technology, and a kind of portable multi-band combined light source document trace check meter is provided, and has realized equipment miniaturization and mobile handling a case, and multiband combined light source illumination is even, selects imaging device according to detected object; Be convenient to dismounting and carry, the filter extendability is strong.
The utility model is for realizing above-mentioned purpose; Adopt following technical scheme: a kind of portable multi-band combined light source document trace check meter; Comprise the housing, light source and the optical filter that have the darkroom, said housing longitudinal cross-section is isosceles trapezoid, is 360 ° in the closed camera bellows of the truncated cone-shaped of said housing and is evenly distributed with the multiband combined light source that is made up of light emitting diode; The said housing rotating cylinder that is provided with modular multilevel optical filter inserting groove suitable for reading; Said rotating cylinder top is provided with the adaptable interface of imaging device, and said housing, rotating cylinder and adaptable interface constitute the whole portable formula structure of affixing one's seal, and said multiband combined light source is connected with ECU.
Said multiband combined light source penetrates light source by excitation source, side and transmitted light source constitutes; Said excitation source is made up of the light emitting diode of long wave ultraviolet, blue light, green glow, gold-tinted and ruddiness and is distributed on the closed camera bellows inwall of truncated cone-shaped; Said side is penetrated light source and is made up of white light emitting diode, places the front, rear, left and right four direction of the closed camera bellows inwall of truncated cone-shaped respectively; Said transmitted light source is tabular independent face light source.
Said transmitted light source emission wavelength adopts visible-range, and its light-emitting area is 280mm * 280mm.
Modular multilevel optical filter inserting groove on the said rotating cylinder is pegged graft respectively and is adopted five logical types of band and four combination filter systems that the cut-off type optical filter constitutes.
The passband wavelength of the logical type optical filter of said combination filter system's band is between 400nm～800nm.
The adaptable interface of said imaging device adopts M82-M37 totally 10 groups of standard thread adapter rings.
Beneficial effect: the Rotary-table formula portable equipment of affixing one's seal; Adopt self-closing camera bellows multiband combined light source and light uniforming device; Spectrum segment is furnished with multiband and receives filter and near infrared imaging system; Carry out the spectrum segment exchange through controller any single page file, folder file, on-the-spot vestige etc. are carried out the fast imaging evidence obtaining, but the Real Time Observation image quasi real time extracts variation characteristic.Have good versatility and interchangeability; Adopt the modular design structure, be furnished with various general adaptable interfaces, can use various standard bore cameras and video camera flexibly.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the three-dimensional outside drawing of the utility model;
Fig. 3 is the block diagram of system of the utility model.
Among the figure: 1, housing, 2, the multiband combined light source, 3, inserting groove, 4, rotating cylinder, 5, adaptable interface, 6, ECU, 7, transmitted light source, 8, combination filter system.
Embodiment
Embodiment below in conjunction with accompanying drawing and preferred embodiment detailed description the utility model.As shown in the figure; See accompanying drawing for details, a kind of portable multi-band combined light source document trace check meter comprises the housing 1, light source and the optical filter that have the darkroom; Said housing longitudinal cross-section is isosceles trapezoid; Be 360 ° in the closed camera bellows of the truncated cone-shaped of said housing and be evenly distributed with the multiband combined light source 2 that constitutes by light emitting diode, the said housing rotating cylinder 4 that is provided with modular multilevel optical filter inserting groove 3 suitable for reading, said rotating cylinder top is provided with the adaptable interface 5 of imaging device; Said housing, rotating cylinder and adaptable interface constitute the whole portable formula structure of affixing one's seal, and said multiband combined light source is connected with ECU 6.Said multiband combined light source penetrates light source by excitation source, side and transmitted light source constitutes; Said excitation source is made up of the light emitting diode of long wave ultraviolet, blue light, green glow, gold-tinted and ruddiness and is distributed on the closed camera bellows inwall of truncated cone-shaped; Said side is penetrated light source and is made up of white light emitting diode, places the front, rear, left and right four direction of the closed camera bellows inwall of truncated cone-shaped respectively; Said transmitted light source 7 is tabular independent face light source.Said transmitted light source emission wavelength adopts visible-range, and its light-emitting area is 280mm * 280mm.Modular multilevel optical filter inserting groove on the said rotating cylinder is pegged graft respectively and is adopted five logical types of band and four combination filter systems 8 that the cut-off type optical filter constitutes.The passband wavelength of the logical type optical filter of said combination filter system's band is between 400nm～800nm.The adaptable interface of said imaging device adopts M82-M37 totally 10 groups of standard thread adapter rings.
(1) multiband combined light source
1. excitation source
Excitation source is used for shot file, makes ink marks stimulated emission on the file and produces fluorescence.By the light emitting diode array combination with great visual angle of 5 groups of high brightness.Its wavelength adopts 5 logical wave bands of band and 4 combination wave bands (also can be arbitrarily made with 31 kinds of different-wavebands), is respectively:
The logical wave band of band:
Select the light emitting diode (be called for short 385nm wave band) of emission wavelength, as the long wave ultraviolet light source at 380nm～385nm.
Select the light emitting diode (be called for short 470nm wave band) of emission wavelength, as blue light source at 465nm～470nm.
Select the light emitting diode (be called for short 525nm wave band) of emission wavelength, as green-light source at 520nm～525nm.
Select the light emitting diode (be called for short 595nm wave band) of emission wavelength, as the gold-tinted light source at 590nm～595nm.
Select the light emitting diode (be called for short 625nm wave band) of emission wavelength, as red-light source at 620nm～625nm.
The combination wave band:
400nm and 470nm are carried out illuminated in combination, form ultraviolet light+blue light combination wave band.
470nm and 525nm are carried out illuminated in combination, form blue light+green glow combination wave band.
525nm and 595nm are carried out illuminated in combination, form green glow+gold-tinted combination wave band.
595nm and 625nm are carried out illuminated in combination, form gold-tinted+ruddiness combination wave band.
As required, also can 400nm and 525nm be carried out illuminated in combination, form ultraviolet light+green glow combination wave band ... or the like, have 31 kinds of assembled state.
The mixed light chamber:
Adopt light emitted, neutral grey milky white sheet and diffuse-reflective cavity structure with great visual angle, its effect is that spectrum equivalent is absorbed, and forms the uniform diffuse reflection body, reaches coloured light mixing, the uniform purpose of illumination.
2. transmitted light source
Transmitted light source is used to observe the subrane absorbing state of file under the transmitted light radiation situation, can reach the effect complementary with reflection-absorption, also helps the inspection to writing in the file back side or the interlayer simultaneously.Adopt emission wavelength at visible-range, light-emitting area is the area source of 280mm * 280mm.
3. sidelight light source
The photometry light source be light from the incident of file side, be mainly used in fibr tissue surface appearances such as the outstanding fluffing that manifests seized paper surface, impression, tool marks.If also can give prominence to the impression that shows writing and seal with the file back side up.Adopt the controlled white light emitting diode display light source of 4 directions in front, rear, left and right.
(2) combination filter system
Combination filter system is used for changing logical wavelength of band and cutoff wavelength, cooperates light source, carries out band switching, to reach the different detection effect.Adopt 5 logical types of band and 4 cut-off type optical filters to form:
1. band leads to the type optical filter
The logical type optical filter of band is used for the spectrum picture that subrane receives visible region and near infrared region, helps distinguishing the fluorescence difference of different inks.
Select the passband wavelength between 400nm～500nm, be called for short: blue optical filter.
Select the passband wavelength between 500nm～600nm, be called for short: green optical filter.
Select the passband wavelength between 600nm～700nm, be called for short: yellow optical filter.
Select the passband wavelength between 700nm～750nm, be called for short: orange optical filter.
Select the passband wavelength between 750nm～800nm, be called for short: red optical filter.
2. cut-off type optical filter
Utilize the cut-off type optical filter to have the characteristics of the receiving spectrum scope of broad, be mainly used in reception visible fluorescence.
Select wavelength below 700nm, to end, the optical filter that wavelength passes through more than 700nm is as z700 dead line filter.
Select wavelength below 750nm, to end, the optical filter that wavelength passes through more than 750nm is as z750 dead line filter.
Select wavelength below 800nm, to end, the optical filter that wavelength passes through more than 800nm is as z800 dead line filter.
Select wavelength below 850nm, to end, the optical filter that wavelength passes through more than 850nm is as z850 dead line filter.
Above filter can be independent, also can combination in any use, and the filter combination of first-selected adjacent wavelength also can be striden wavelength combinations as required.
(3) image receiving system
Image receiving system is formed by receiving imaging system and receiving filter system two parts.
1. reception imaging system
Receiving imaging system is used for picture is kept watch on and be recorded as to fluorescent effect, band switching effect on the file.For the ease of real work and follow-up developments, we adopt two kinds of schemes of digital camera of camera+display combinations and moulding, cooperate subsequent calculations mechanism to become to receive imaging system.
Camera+display combinations
Adopt the white-black pattern camera, resolution is greater than 500 lines, and sensitivity is superior to 0.001Lux, and the sense color range is in visible light and near-infrared region, and sensitive wavelength is accompanied 9 cun LCDs greater than 950nm.Be furnished with on the camera lens >=the adapter ring screw thread of M37; Have close-shot function and manual focusing, manual exposure, manual zoom function; The zoom multiple is greater than 6 times; Is furnished with the USB image pick-up card; Images acquired, display image and memory image are carried out on computers.
Digital camera
Resolution is greater than 1,200 ten thousand pixels; Minimal illumination is superior to 0.001Lux; The sense color range is in visible light and near-infrared region, and sensitive wavelength is greater than 950nm; Have on the camera lens >=the wiring screw thread of M58; Have close-shot function and the manual focusing of 30mm imaging, manual exposure, manual zoom function; The optical zoom multiple is greater than 6 times; Can be set at white-black pattern; 3 cun display screens; Built-in >=the 4GB storage card; Have video-out port and data-out port; General "Green" software program, camera and computing machine can connect machine work with data line, when image shows on camera, also can show on computers.
2. reception filter system
Receive filter system and be used for changing logical wavelength of band and cutoff wavelength, cooperate light source, carry out band switching, to reach the different detection effect.Be made up of 5 logical types of band and 4 cut-off type optical filters: filter system adopts the photographic-grade standard filter of diameter 77mm, adopts the monolithic plug-in type and connects the machine conversion regime and carry out conversion combination, the nearly 500 kinds of states of one-tenth capable of being combined altogether.
3. light source and filter combined system
With light source with filter is integrated is combined in the portable light tube, this light tube can be used as the preposition adapter ring of camera or camera, forms the hand-held quick evidence-obtaining system of type of affixing one's seal.
(4) light-source control system
Light-source control system is external independent box, integrated CS and two parts of power supply, and adopt the fast insert-pull joint between the combined light source system, so that carry and operate.This check meter light-source control system not only can directly connect civil power, also leaves external power interface and is used to connect the external battery box, is convenient to literary composition/trace appearance and goes out to carry out the evidence obtaining task.
(5) image processing system
Image processing system adopts common software, mainly comprises: camera, picture pick-up device bundled software, notebook computer installation system software and literal/image processing software commonly used, printer software and PHOTOSHOP image processing software.
Know-why
1. fluorescent inspection principle
Many materials can produce the fluorescence of being longer than excitation wavelength when receiving optical excitation.According to these characteristics, adopt the visible light that is shorter than red light wavelength to excite material at red extremely red fluorescence to the near infrared spectrum district, just formed a kind of means of qualitative identification different material.
Though color and luster was identical when for example the ink of the different trades mark detected by an unaided eye in the visible range, different often at the wavelength of orange, red sector or near-infrared region fluorescence under blue-light excited with intensity, can judge that thus whether file is through altering.Just human eye to the feeling ability of ruddiness very a little less than, more can not experience infrared light, so need to adopt the method for infrared photography to write down and change.Again because the spectral radiance of excitation source can not be very pure, and that the fluorescence of material stimulated emission is compared with exciting light is extremely faint, if from the light that video camera receives, do not remove former exciting light composition, the then faint fluorescence light that will be excited is covered.This just needs from excitation source, to remove the wavelength that part of light identical with the fluorescence spectral coverage with exciter filter earlier, from the fluorescence that receives, removes the exciting light of shortwave part with receiving optical filter again, and receives only pure fluorescence.Because the effect of different wave length fluorescence excitation is different, and is also inequality in utmost point red sector different-waveband fluorescence intensity,, extremely red fluorescence subrane is observed the multiple combined effect that will produce the identification ink marks so the exciting light subrane is excited.
2. absorption inspection principle
Various materials present shades of colour under white light be because material itself is selected the result of absorption to light.Like greeny object, show that it reflects green light, and absorbed the light of other colors.If redness of on blank sheet of paper, writing and blue writing mix when being difficult for distinguishing, available Red lightscreening plate improves the observation to blue writing.Otherwise also available blue color filter improves the observation to red writing.When seized file when utmost point red sector subrane is done reflection or transmission check, can manifest certain correction or obvious variation vestige in some cases, this mainly is to have utilized the absorption characteristic different features of different material at utmost point red sector.
Major technique and performance index
1. excitation source spectral range:
Ultraviolet: 380nm～385nm
Blue light: 465nm～470nm
Green glow: 520nm～525nm
Gold-tinted: 590nm～595nm
Ruddiness: 620nm～625nm
2. transmitted light source colour temperature: 5500K
3. transmitted light source light district scope: 280mm * 280mm
4. band leads to type optical filter wavelength coverage: indigo plant: 400nm～500nm
Green: 500nm～600nm
Yellow: 600nm～700nm
Orange: 700nm～750nm
Red: 750nm～800nm
5. cut-off type optical filter wavelength coverage :≤700nm
≤750nm
≤800nm
≤850nm
6. camera resolution: >=500 lines
7. camera resolution: >=1,200 ten thousand pixels
8. camera data memory capacity: SD card (8G)
9. use power supply: 220V/50Hz
10. Package size: 400mm * 400mm * 400mm
11. weight: 3.0kg
The above only is the preferred embodiment of the utility model, is not the structure of the utility model is done any pro forma restriction.Every technical spirit according to the utility model is to any simple modification, equivalent variations and modification that above embodiment did, all still belongs in the scope of technical scheme of the utility model.
Claims (6)
1. portable multi-band combined light source document trace check meter; Comprise the housing, light source and the optical filter that have the darkroom; It is characterized in that: said housing longitudinal cross-section is isosceles trapezoid; Be 360 ° in the closed camera bellows of the truncated cone-shaped of said housing and be evenly distributed with the multiband combined light source that constitutes by light emitting diode, the said housing rotating cylinder that is provided with modular multilevel optical filter inserting groove suitable for reading, said rotating cylinder top is provided with the adaptable interface of imaging device; Said housing, rotating cylinder and adaptable interface constitute the whole portable formula structure of affixing one's seal, and said multiband combined light source is connected with ECU.
2. portable multi-band combined light source document trace check meter according to claim 1; It is characterized in that: said multiband combined light source penetrates light source by excitation source, side and transmitted light source constitutes; Said excitation source is made up of the light emitting diode of long wave ultraviolet, blue light, green glow, gold-tinted and ruddiness and is distributed on the closed camera bellows inwall of truncated cone-shaped; Said side is penetrated light source and is made up of white light emitting diode, places the front, rear, left and right four direction of the closed camera bellows inwall of truncated cone-shaped respectively; Said transmitted light source is tabular independent face light source.
3. portable multi-band combined light source document trace check meter according to claim 2 is characterized in that: said transmitted light source emission wavelength adopts visible-range, and its light-emitting area is 280mm * 280mm.
4. portable multi-band combined light source document trace check meter according to claim 1 is characterized in that: the modular multilevel optical filter inserting groove on the said rotating cylinder is pegged graft respectively and is adopted five logical types of band and four combination filter systems that the cut-off type optical filter constitutes.
5. portable multi-band combined light source document trace check meter according to claim 4 is characterized in that: the passband wavelength of the logical type optical filter of said combination filter system's band is between 400nm～800nm.
6. portable multi-band combined light source document trace check meter according to claim 1 is characterized in that: the adaptable interface of said imaging device adopts M82-M37 totally 10 groups of standard thread adapter rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220180149.9U CN202599838U (en) | 2012-04-26 | 2012-04-26 | Portable multi-wave-band combination light source mark check meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220180149.9U CN202599838U (en) | 2012-04-26 | 2012-04-26 | Portable multi-wave-band combination light source mark check meter |
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| Publication Number | Publication Date |
|---|---|
| CN202599838U true CN202599838U (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220180149.9U Expired - Fee Related CN202599838U (en) | 2012-04-26 | 2012-04-26 | Portable multi-wave-band combination light source mark check meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636470A (en) * | 2012-04-26 | 2012-08-15 | 天津市宏丰科技发展有限公司 | Portable multiband combined light source text mark inspection instrument |
| CN110044819A (en) * | 2019-04-30 | 2019-07-23 | 重庆盾银科技有限公司 | A kind of detachable alternative light source mounting structure and its assembly and disassembly methods |
-
2012
- 2012-04-26 CN CN201220180149.9U patent/CN202599838U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636470A (en) * | 2012-04-26 | 2012-08-15 | 天津市宏丰科技发展有限公司 | Portable multiband combined light source text mark inspection instrument |
| CN110044819A (en) * | 2019-04-30 | 2019-07-23 | 重庆盾银科技有限公司 | A kind of detachable alternative light source mounting structure and its assembly and disassembly methods |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20140426 |