CN101520420A - Middle and far infrared camera - Google Patents
Middle and far infrared camera Download PDFInfo
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- CN101520420A CN101520420A CN 200910081385 CN200910081385A CN101520420A CN 101520420 A CN101520420 A CN 101520420A CN 200910081385 CN200910081385 CN 200910081385 CN 200910081385 A CN200910081385 A CN 200910081385A CN 101520420 A CN101520420 A CN 101520420A
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- far infrared
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Abstract
The invention relates to a middle and far infrared camera which comprises an infrared detector and a light source, wherein the infrared detector is provided with an infrared lens, an infrared optical filter is arranged in front of the infrared lens; after light emitted by the light source irradiates a laboratory sample, specific waveband light filtered by the infrared optical filter enters the infrared detector to image, the infrared detector is a middle and far infrared detector, and the waveband of the infrared detector is a middle and far infrared waveband. The invention is mainly used for identifying ink or handwriting with different contents, the ink or the handwriting with different contents possibly has different reflection characteristics, absorption characteristics and fluorescence characteristics for middle and far infrared rays, thus, the brightness of images of infrared photos are different possibly, so that the ink or the handwriting with the same color but different contents can be distinguished.
Description
Technical field
The present invention relates to a kind of infrared photography device, particularly a kind of mid and far infrared photographic means, it is applied to the forensic science technical field, is mainly used in color is identical but printing ink or writing that composition is different make a distinction.
Background technology
The inspection of document is as a specialty in the forensic science, in the detection of criminal and civil case and hearing process, has important effect, the infrared photography technology is the important means in the inspection of document, has special effect, has the effect that gets instant result for manifesting of writing such as revising, smear, infrared photography comprises infrared external reflection camera technique, Infrared fluorescence camera technique, infrared transmission camera technique.But traditional infrared photography is confined to the 750nm-1350nm of near-infrared band always, and wherein 1350nm is the sensitive band of infrared film.The infrared photography device that is used for forensic science now also is confined to 1200nm, can arrive 1400nm farthest.In a word, existing application also is confined to near-infrared band in the infrared photography device of forensic science.
Summary of the invention
Fundamental purpose of the present invention provides a kind of mid and far infrared photographic means, it utilizes the far reflection of printing ink centering and absorption characteristic and fluorescent characteristic, color is identical but printing ink or writing that composition is different make a distinction, even identical principal ingredient, printing ink or writing that submember is different make a distinction.
In order to achieve the above object, the invention provides a kind of mid and far infrared line photographic means, it comprises
One pyroscan, described pyroscan has an infrared lens, and an infrared fileter is installed before the described infrared lens;
One light source, the rayed that described light source sends are behind an experiment sample, and the light that utilizes described infrared fileter to filter the back specific band enters described pyroscan and carries out imaging; It is characterized in that described pyroscan is the mid and far infrared detector, the wave band of described mid and far infrared detector is the mid and far infrared wave band.
Preferable, described mid and far infrared wave band is 3um to 15um.
Preferable, described light source shines in described experiment sample by an optical filter.
Preferable, described light source is a light emitting diode.
Preferable, described light emitting diode is ultraviolet light-emitting diode, visible light emitting diode or infrarede emitting diode.
Preferable, described light source is a laser instrument.
Preferable, described laser instrument is Argon ion laser, dye laser, semiconductor laser, solid state laser or gas laser.
Preferable, the bandpass width of described infrared fileter is less than 20nm.
Beneficial effect of the present invention is: can be with color is identical but the printing ink that composition is different or the nuance of writing make a distinction, in the detection of case and hearing process, play an important role.
Description of drawings
Fig. 1 is the mid and far infrared photographic means first embodiment synoptic diagram of the present invention;
Fig. 2 is the mid and far infrared photographic means second embodiment synoptic diagram of the present invention;
Fig. 3 is mid and far infrared photographic means the 3rd an embodiment synoptic diagram of the present invention;
Fig. 4 is mid and far infrared photographic means the 4th an embodiment synoptic diagram of the present invention.
Description of reference numerals: 1-pyroscan; The 2-infrared lens; The 3-experiment sample; The 4-infrared fileter; The 5-light source; The 6-workbench; The 7-optical filter.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
As shown in Figure 1, the present invention is the mid and far infrared photographic means, and it comprises: a pyroscan 1, described pyroscan have an infrared lens 2, and described infrared lens 2 the place aheads have infrared fileter 4; One light source 5, the rayed that described light source 5 sends are on an experiment sample 3, and wherein, described experiment sample 3 can be positioned on the workbench 6, with convenient check.The light that shines on described experiment sample 3 enters described pyroscan 1 through the reflection back by infrared fileter 4; Described pyroscan 1 is the mid and far infrared detector, and the wave band of described mid and far infrared detector is the mid and far infrared wave band, described in infrared eye generally at 3um to 5um wave band and described far infrared deterctor generally at 8um to 14um wave band.Described mid and far infrared wave band also can comprise non-atmospheric window wave band, i.e. 5um-8um wave band and 14um-15um wave band.
In juridical practice, the composition difference of different printing ink or writing, the reflection characteristic of centering far infrared, absorption characteristic, fluorescent characteristic difference, the brightness of image of infrared photograph will be different like this, therefore the printing ink or the writing of heterogeneity can be made a distinction.
As shown in Figure 1, described light source 5 is an infrared light supply, with infrared radiation in experiment sample 3, specific infrared fileter 4 is installed in infrared eye 1 front, utilize this infrared fileter 4 to receive the specific band infrared light then, enter imaging in the described pyroscan 1 then, check the reflecting properties of 3 pairs of specific infrared lights of this experiment sample with this.Infrared ray to different-waveband in the printing ink of heterogeneity may have different reflection potentiales, and it utilizes this nuance to the infrared reflection ability to come the writing difference of different ink compositions.
Wherein, described light source 5 also can be ultraviolet source, bluish-green light source, when utilizing ultraviolet source and bluish-green light source as excitation source, the rayed that ultraviolet source or bluish-green light source are sent is in experiment sample 3, the infrared fileter 4 of specific band is installed in infrared eye 1 front, utilize this infrared fileter 4 to receive the Infrared fluorescence image of writing then, enter imaging in the described pyroscan 1 then, check the fluorescent characteristic of this sample specific ultraviolet source or bluish-green light source with this.Exciting light to different-waveband in the printing ink of heterogeneity may have different fluorescent characteristics.Above-mentioned ultraviolet source can be selected the 254nm of shortwave and the ultraviolet source of long wave ultraviolet 365nm.
Also can utilize infrared light sources to excite, utilize infrared fileter 4 to select specific band to receive the fluorescent brightness image then.Utilize above-mentioned different excitation source, different reception optical filters carry out combination experiment, can clearly show the difference of printing ink heterogeneity with the form of image.
As described in Figure 2, described light source 5 also can shine in experiment sample 3 by another optical filter 7, and described optical filter 7 has played the effect that light is selected.If the monochromaticity of light source 5 is fine, when being light emitting diode or laser instrument as light source 5, can be without this optical filter 7.Described light emitting diode can be ultraviolet light-emitting diode, visible light emitting diode, infrarede emitting diode.Described laser instrument can be Argon ion laser, dye laser, semiconductor laser, solid state laser, gas laser etc.
As shown in Figure 3, described excitation source 5 can be from the back side illuminaton experiment sample 3 of test sample, the infrared fileter 4 of specific band is installed before the infrared eye 1, the light transmission experiment sample 3 that light source 5 sends, utilize this infrared fileter 4 to receive transmitted ray then, enter imaging in the described pyroscan 1 then, excitation source 5 described here can be short wavelength's a blue green light, ultraviolet light, also infrared light, receiving wave range can be by infrared fileter 4 decisions, the light that receives can be the infrared light that transmission is come, and also can be the Infrared fluorescence that transmission is come, and it is determined by experiment sample 3.This kind infrared transmitting photographic means also can adopt different excitation source 5, and different reception infrared fileters 4 carry out combination experiment.
As described in Figure 4, described light source 5 also can shine in experiment sample 3 by another optical filter 7, and described optical filter 7 has played the effect that light is selected.
Above-mentioned light source 5 can select the light emitting diode of wave bands such as 254nm, 365nm, 400nm, 525nm as excitation source.Light emitting diode is compared with traditional light source, and monochromaticity is more better, might inspire the fluorescence of comparison dullness, the easier composition characteristics that reflects printing ink.The carbon dioxide laser that can also select the YAG laser instrument of 1064nm and 10.6um utilizes optical filter to receive the Infrared fluorescence image more farther than exciting light wave band as excitation source.Also can select other specific infrared light supplies, obtain the infrared output of specific band.
In sum, this kind mid and far infrared photographic means is mainly used in the check to printing ink and writing, can certainly be used for the check of textile, paper, plastics, coin, seal, bloodstain, paint etc.The spectral range of all pyroscans all will fall into the protection domain of this patent at the mid and far infrared wave band.
More than explanation is just illustrative for the purpose of the present invention; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claims and limited; can make many modifications, variation or equivalence, but all fall within the scope of protection of the present invention.
Claims (8)
1, a kind of mid and far infrared line photographic means, it comprises
One pyroscan, described pyroscan has an infrared lens, and an infrared fileter is installed before the described infrared lens;
One light source, the rayed that described light source sends are behind an experiment sample, and the light that utilizes described infrared fileter to filter the back specific band enters described pyroscan and carries out imaging; It is characterized in that described pyroscan is the mid and far infrared detector, the wave band of described mid and far infrared detector is the mid and far infrared wave band.
2, mid and far infrared line photographic means according to claim 1 is characterized in that, described mid and far infrared wave band is 3um to 15um.
3, mid and far infrared line photographic means according to claim 1 is characterized in that described light source shines in described experiment sample by another optical filter.
4, mid and far infrared line photographic means according to claim 1 is characterized in that, described light source is a light emitting diode.
5, mid and far infrared line photographic means according to claim 4 is characterized in that, described light emitting diode is ultraviolet light-emitting diode, visible light emitting diode or infrarede emitting diode.
6, mid and far infrared line photographic means according to claim 1 is characterized in that, described light source is a laser instrument.
7, mid and far infrared line photographic means according to claim 6 is characterized in that, described laser instrument is Argon ion laser, dye laser, semiconductor laser, solid state laser or gas laser.
8, mid and far infrared line photographic means according to claim 1 is characterized in that the bandpass width of described infrared fileter is less than 20nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910081385 CN101520420B (en) | 2009-04-03 | 2009-04-03 | Middle and far infrared camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910081385 CN101520420B (en) | 2009-04-03 | 2009-04-03 | Middle and far infrared camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101520420A true CN101520420A (en) | 2009-09-02 |
| CN101520420B CN101520420B (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910081385 Expired - Fee Related CN101520420B (en) | 2009-04-03 | 2009-04-03 | Middle and far infrared camera |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102184394A (en) * | 2011-03-10 | 2011-09-14 | 上海市公安局物证鉴定中心 | Method and device for revealing and extracting scene potential fingerprint |
| CN102735661A (en) * | 2011-04-12 | 2012-10-17 | 施乐公司 | Clear overcoat compositions and methods for using and detecting the same |
| CN102830575A (en) * | 2012-09-21 | 2012-12-19 | 河南平原光电有限公司 | Portable camera |
| CN103973952A (en) * | 2014-05-15 | 2014-08-06 | 深圳市唯特视科技有限公司 | Four-dimensional human body recognition device |
| CN110082349A (en) * | 2019-02-01 | 2019-08-02 | 南京师范大学 | A kind of inland nutrition-enriched water of lake blue alga biomass ratio remote sensing estimation method based on OLCI |
| CN110458998A (en) * | 2019-07-11 | 2019-11-15 | 深圳怡化电脑股份有限公司 | Bill detection method, bill detection device and terminal |
-
2009
- 2009-04-03 CN CN 200910081385 patent/CN101520420B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102184394A (en) * | 2011-03-10 | 2011-09-14 | 上海市公安局物证鉴定中心 | Method and device for revealing and extracting scene potential fingerprint |
| CN102735661A (en) * | 2011-04-12 | 2012-10-17 | 施乐公司 | Clear overcoat compositions and methods for using and detecting the same |
| CN102735661B (en) * | 2011-04-12 | 2015-11-25 | 施乐公司 | Transparent topcoat composition and use thereof and detection method |
| CN102830575A (en) * | 2012-09-21 | 2012-12-19 | 河南平原光电有限公司 | Portable camera |
| CN103973952A (en) * | 2014-05-15 | 2014-08-06 | 深圳市唯特视科技有限公司 | Four-dimensional human body recognition device |
| CN110082349A (en) * | 2019-02-01 | 2019-08-02 | 南京师范大学 | A kind of inland nutrition-enriched water of lake blue alga biomass ratio remote sensing estimation method based on OLCI |
| CN110458998A (en) * | 2019-07-11 | 2019-11-15 | 深圳怡化电脑股份有限公司 | Bill detection method, bill detection device and terminal |
| CN110458998B (en) * | 2019-07-11 | 2021-11-16 | 深圳怡化电脑股份有限公司 | Bill detection method, bill detection device and terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101520420B (en) | 2011-05-04 |
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