CN209342614U - Copy paper video fluorescent spectral test equipment - Google Patents

Abstract

The utility model provides a kind of copy paper video fluorescent spectral test equipment, which includes the display screen, host and objective table being arranged from top to bottom.The host includes light-source system and imaging system, and the light-source system has floodlight source, long wave ultraviolet light source and intense light source, and the imaging system includes camera；The host further includes dispersion element, the first colour filter including being arranged in the intense light source front end and the second colour filter for being arranged in the camera front end；The objective table is arranged at the imaging system lower position preset distance.The upper surface of the host is equipped with control panel.Inspection process used in the equipment is easy to operate, and the fluorescence phenomenon presented under each operating condition is vertical to be waited as it can be seen that can be realized the quick identification of copy paper sample.The operating condition and method of the equipment do not have any pollution and damage to copy paper sample in checkout procedure.The equipment volume is small and exquisite, easy to carry.

Description

Copy paper video fluorescent spectral test equipment

Technical field

The utility model relates to inspection of document field, in particular to a kind of copy paper video fluorescent spectral test equipment.

Background technique

Copy paper is the paper used suitable for duplicator, Printers and Faxes machine, and paper product is pure white, smooth, and fiber is fine and closely woven, Stiffness is higher, because it is with certain antistatic property, also referred to as " electro-photographic paper ".The performance of copy paper is stablized, and is daily do A kind of indispensable paper product in public affairs.Some unprincipled fellows often print reaction propaganda material, letter of blackmailing using copy paper Deng, make copy paper become a kind of its tool for being engaged in illegal activity；In addition, party concerned is led to sometimes in economy class case It crosses and the modes such as replicates, skips come the documents such as contract, agreement, ticket of forging or alter, cause people's commercial dispute, destroy finance Order.Therefore, the inspection of document practitioner of forensic science field often will type, brand, batch to copy paper etc. carry out It examines and identifies, determine the true and false and the source of documents, and then provide direction and clue for investigation, mentioned for court action For strong evidence.Inspection of document practitioner both domestic and external is usually using biomicroscope, infrared spectrometer, UV, visible light point The instrument and equipments such as light photometer, scanning electron microscope and electron spectrometer carry out kinds of fibers, filler ingredient of copy paper etc. qualitative Analysis.But these instrument and equipments are complicated for operation, expensive, or damage outturn, all have certain limitation, in reality Border is difficult to popularize in handling a case.

The existing instrument and equipment examined, identify copy paper includes biology microscope, infrared spectrometer, UV, visible light point Light photometer, scanning electron microscope and electron spectrometer etc..The copy paper of different manufacturers, brand and model its constituent phase not to the utmost Together, the case where absorbing light energy just will be different；Therefore, different copy papers have its distinctive, solid under light wave scanning Fixed absorption and reflection spectrum curve can be realized according to the spectral signatures such as the quantity of spectral peak, position, intensity difference to copy paper Identify.Ultraviolet-visible spectrophotometer is made of components such as light source, monochromator, absorption cell, detector and signal processors. The function of light source is to provide sufficient intensity, stable continuous spectrum.Ultraviolet region usually uses hydrogen lamp or deuterium lamp, it is seen that light area is logical Common tungsten lamp or tungsten halogen lamp.The function of monochromator is by compound photodegradation that light source issues and therefrom to separate the monochrome of required wavelength Light.Dispersion element has prism and two kinds of grating.The measurement of the measurement of visible region glass absorption cell, ultraviolet region must use quartz Absorption cell.The function of detector is that the intensity of light is penetrated by photo-electric conversion element detection, converts optical signals into electric signal.Often Photo-electric conversion element has photoelectric tube, photomultiplier tube and photodiode array detector.Main test step is by following several Step composition.It weighs 1 gram of barium sulfate powder to be put into instrument sample pond, is then flattened surface with organic glass pestle, adjust instrument Light beam obtains standard white；Make reference with standard white, copy paper sample to be measured is inserted into integrating sphere, reflected light is obtained after scanning Spectrum；Identify copy paper according to the amplitude of variation of the peak number of UV Vis reflective spectrum, peak position and reflectivity.It examines in the prior art The instrument and equipment for testing, identifying copy paper has following defects that

(1) operating procedure of the prior art is complicated: identifying the operating procedure of copy paper using ultraviolet-uisible spectrophotometer It is cumbersome, pressed barium sulfate powder is needed, instrument beam is adjusted, to obtain standard white as reference sample.

(2) Check-Out Time of the prior art is long: identifying copy paper using ultraviolet-uisible spectrophotometer and needs using 320- The light wave range of 750nm is one by one scanned sample, and instrument is waited to provide reflection spectrum curve；The time of Sample Scan compared with It is long, and identification result cannot be shown immediately, need the post analysis of professional.

(3) spectral curve obtained after the prior art tests to outturn needs professional to interpret, and passes through The amplitude of variation of the peak number of reflectance spectrum, peak position and reflectivity identifies copy paper, and to the analysis of spectral curve once produce Raw deviation, then will lead to the identification result of mistake.

Utility model content

To solve, inspection equipment operation step in the prior art is complicated, Check-Out Time is long, cannot immediately arrive at detection knot The problem of fruit, the utility model provide a kind of copy paper video fluorescent spectral test equipment, the inspection equipment include from upper and Display screen, host and the objective table of lower setting.The host includes light-source system and imaging system, and the light-source system has general Light source, long wave ultraviolet light source and intense light source, the imaging system include camera；The host further includes dispersion element, including The first colour filter for being arranged in the intense light source front end and the second colour filter for being arranged in the camera front end；The objective table It is arranged at the imaging system lower position preset distance.

Preferably, the upper surface of the host is equipped with control panel, has selection light-source system on the control panel, adjusts The control button or knob of the enlargement ratio of whole imaging system, the realtime graphic of records tests.

Preferably, which is case structure, and at case lid, the host and objective table are located at the display location At cabinet, cabinet position corresponding with the objective table is equipped with the opening that can place copy paper, the case lid and described Cabinet is pivotally connected.

Preferably, the floodlight source and the intense light source use incandescent lamp, and the long wave ultraviolet light source uses low-pressure steam Discharge tube.

Preferably, the intense light source is 1 incandescent lamp being arranged in the middle part of the host, and having a size of 50cm, voltage is 12V, power 100W.

Preferably, the floodlight source is 4 incandescent lamps being arranged in the host surrounding, having a size of 16cm, voltage For 12V, power 12.8W.

Preferably, the long wave ultraviolet light source is 2 low-pressure steam discharge tubes for being arranged in the host two sides, power For 9W.

Preferably, the spectral region of first colour filter is 400nm~570nm, for through the strong light of blue；Described The spectral region of two colour filters is 520nm~780nm, through visible light and near infrared light.

Preferably, the imaging system is cold infrared colo r numeral camera system built in the high-resolution of 10,000,000 pixels, Its enlargement ratio is 0~32, and spectral region is 400~1000nm.

Preferably, the specification for carrying the objective table of outturn to be checked is 250mm × 320mm.

Preferably, the size of the inspection equipment is 250 × 320 × 300mm.

Copy paper video fluorescent spectral test equipment according to the present utility model, obtainable beneficial effect include at least:

(1) inspection process used in the equipment is easy to operate, the fluorescence phenomenon presented under each operating condition it is vertical equal as it can be seen that It can be realized the quick identification of copy paper sample.

(2) operating condition of the equipment and method do not have any pollution and damage to copy paper sample in checkout procedure.

(3) equipment volume is small and exquisite, easy to carry.

It should be appreciated that aforementioned description substantially and subsequent detailed description are exemplary illustration and explanation, it should not As the limitation to the claimed content of the utility model.

Detailed description of the invention

With reference to the attached drawing of accompanying, the more purposes of the utility model, function and advantage will pass through the utility model embodiment party Formula is illustrated described below, in which:

Fig. 1 schematically shows the structural schematic diagram of the copy paper video fluorescent spectral test equipment of the utility model；

Fig. 2 is an embodiment schematic diagram of host in the utility model；

Fig. 3 is the functional block diagram of the copy paper video fluorescent spectral test equipment of the utility model；

Fig. 4 is Gold Flagship copy paper UV video fluorescent spectrum；

Fig. 5 is Fu Mei copy paper UV video fluorescent spectrum；

Fig. 6 is capable Coral Sea's copy paper UV video fluorescent spectrum；

Fig. 7 is Double A copy paper UV video fluorescent spectrum；

Fig. 8 is the intense light source video fluorescent spectrum of Blue.G warship five-pointed star copy paper sample；

Fig. 9 is the intense light source video fluorescent spectrum of capable Coral Sea's copy paper；

Figure 10 is the intense light source video fluorescent spectrum of Blue.G warship Samsung copy paper sample；

Figure 11 is the intense light source video fluorescent spectrum of day chapter dragon copy paper sample；

Figure 12 is preferred the intense light source video fluorescent spectrum of print copy paper sample；

Figure 13 is the intense light source video fluorescent spectrum of day chapter fresh green copy paper sample.

Specific embodiment

By reference to exemplary embodiment, the purpose of this utility model and function and for realizing these purposes and function Method will be illustrated.However, the utility model is not limited to exemplary embodiment as disclosed below；It can be by not It is realized with form.The essence of specification is only to aid in those skilled in the relevant arts' Integrated Understanding the utility model Detail.

Hereinafter, the embodiments of the present invention will be described with reference to the drawings.In the accompanying drawings, identical appended drawing reference represents Same or similar component or same or like step.

To solve, inspection equipment operation step in the prior art is complicated, Check-Out Time is long, cannot immediately arrive at detection knot The problem of fruit, the utility model provide a kind of copy paper video fluorescent spectral test equipment, and Fig. 1 shows the inspection equipment Structural schematic diagram, Fig. 2 are an embodiment schematic diagram of host.As shown in Figure 1 and Figure 2, which includes setting from top to bottom Display screen 10, host 20 and objective table 30 for setting etc..The inspection equipment may also comprise processor, processor be connected with host 20 or It is located in host 20, processor is also connected with display screen 10, will test result and shows in real time on the display screen 10.

In the above-described embodiment, host 20 may include light-source system and imaging system 23.Wherein, light-source system has general Light source 22A, long wave ultraviolet light source 22B and intense light source 22C, imaging system 23 include camera.Host 20 may also include dispersion member Part, including the first colour filter 24B for being arranged in the front end intense light source 22C and the second colour filter 24A for being arranged in camera front end.

In the above-described embodiment, objective table 30 is arranged at 23 lower position preset distance of imaging system, described herein Preset distance should be within the scope of 23 blur-free imaging of imaging system, or within the scope of the imaging focal length of camera.

In the above-described embodiment, the upper surface of host 20 can be equipped with control panel 21, can have choosing on control panel 21 Select light-source system, adjust the enlargement ratio of imaging system, records tests realtime graphic control button or knob.In another reality It applies in mode, the upper surface of host 20 can also be equipped with electric control gear, for selecting, adjusting light-source system, dispersion element and imaging The enlargement ratio of system；The realtime graphic etc. of records tests.

In a specific implementation, incandescent lamp is can be used in floodlight source 22A and intense light source 22C, and long wave ultraviolet light source 22B can be used Low-pressure steam discharge tube.When it is implemented, intense light source 22C can be 1 incandescent lamp for being arranged in 20 middle part of host, having a size of 50cm, voltage 12V, power 100W.Floodlight source 22A can be 4 incandescent lamps being arranged in 20 surrounding of host, having a size of 16cm, voltage 12V, power 12.8W.Long wave ultraviolet light source 22B can be to be arranged in 2 low-pressure steams of 20 two sides of host to put Fulgurite, power 9W.In other embodiments, of floodlight source 22A, long wave ultraviolet light source 22B and intense light source 22C setting Several and position can be set according to demand.

In the above-described embodiment, (UV and visible spectra, the ultraviolet and of UV involved in this equipment Visible spectrum, is abbreviated as UV) fluorescence spectrum except available long wave ultraviolet realize in addition to, short wavelength UV can also be used and be subject to reality It is existing, but short wavelength UV to human body there is a great harm for, short irradiation can skin ambustion, long-term or high intensity illumination also will cause Cutaneum carcinoma, therefore this equipment should be using long wave ultraviolet as excitation light source.

In a specific implementation, the spectral region of the first colour filter 24B is 400nm~570nm, for strong through blue Light.The spectral region of second colour filter 24A is 520nm~780nm, through visible light and near infrared light.

In a specific implementation, imaging system is cold infrared colo r digital vedio recording system built in the high-resolution of 10,000,000 pixels System, enlargement ratio are 0~32, and spectral region is 400~1000nm.

In a specific implementation, the objective table 30 for carrying outturn to be checked should be greater than single printed page specification, objective table 30 specification can be 250mm × 320mm.

In a better embodiment of the utility model, which is case structure, and display screen 10 is located at case At lid, host 20 and objective table 30 are located at cabinet, and cabinet position corresponding with objective table 30 is equipped with can be by copy paper placement Opening, case lid and cabinet are pivotally connected.In this embodiment, the size of the inspection equipment is 250 × 320 × 300mm.Equipment It is whole small and exquisite, it is easy to carry.

It needs that suitable excitation spectrum is selected to obtain the best of documents to be checked using video fluorescent spectral test file Fluorescent effect, by fluorescence phenomenon and intensity come the property, state and the true and false of document of identify material.Video fluorescent spectral test tool There is lossless, quick and visual result advantage, is widely used in forensic science inspection of document field.The utility model The inspection equipment developed is sought a kind of more effective, more convenient and fast verification scheme by video fluorescent spectral test technology, is realized Quick, the Undamaged determination of different brands, model copy paper.

The inspection equipment of the utility model development, does not need to make reference sample in advance, can directly pass through instrument glazing Source irradiation compares fluorescence phenomenon caused by different copy papers, and easy to operate, quick, identification result is presented immediately, without interpreting, Effect of visualization is strong.

The principle of the inspection equipment of the utility model is as shown in Figure 3.Outturn to be checked is radiated at using specific light source, this Utility model provides three kinds of floodlight source, long wave ultraviolet light source and intense light source illumination modes.Outturn shines, and it is existing to generate fluorescence As imagewise pattern being generated over the display by imaging system, fluorescence phenomenon is compared in observation.Identification result is for one species or not Congener copy paper.The substances such as fiber, filler in copy paper sample and the fluorescent whitening agent of addition can be in specific light source Irradiation under generate fluorescence, since the copy paper of different manufacturers, brand and model its internal component is different, in same light source Irradiation under its fluorescence phenomenon also have differences.The inspection equipment of the utility model development, select ultraviolet light and blue light as Main excitation light source, to obtain the best fluorescent effect of different copy paper samples, by the visual comparison of fluorescence phenomenon and intensity, To identify all kinds of copy papers.

The work of key link when identifying copy paper using " the copy paper video fluorescent spectral test equipment " of the utility model It is as follows to make condition:

A) excitation light source --- long wave ultraviolet light source；Image-forming condition --- time for exposure 15ms, aperture 60%；Imaging receives End --- cut-off colour filter spectral region length is led to visible；

B) excitation light source --- the strong light of blue；Image-forming condition --- time for exposure 354ms, aperture 80%, imaging receive End --- the long logical 715nm of cut-off colour filter spectral region.

The inspection process of " the copy paper video fluorescent spectral test equipment " of the utility model is as follows:

1. opening equipment, paper to be checked is put on the objective table in equipment；

2. the enlargement ratio and focal length of imaging device are adjusted under floodlight source-white light operating condition of equipment default, until Showing clearly paper surface image, (remarks: it is clear generally to be showed when enlargement ratio coefficient is 16 by focusing Image)；

3. using excitation light source --- long wave ultraviolet light source, receiving terminal --- cut-off colour filter length of a film is logical as it can be seen that observation is duplicated The visible fluorescence phenomenon that paper is presented, i.e. UV video fluorescent spectrum picture, and record preservation；By comparing different copy papers at this The visible fluorescence phenomenon similarities and differences presented under operating condition, realize the preliminary identification of copy paper.

Identification result citing:

The fluorescence spectrum of Gold Flagship copy paper sample is uniform, impurity is few (see Fig. 4)；The fluorescence spectrum of Fu Mei copy paper sample In have fibrous dark areas different in size (see Fig. 5)；Not only there is fibre in the fluorescence spectrum of capable Coral Sea's copy paper sample Tie up shape dark areas, there are also point bulk dark areas not of uniform size (see Fig. 6)；Removing in the fluorescence spectrum of Double A sample has Outside the dark areas of part, there are also a small amount of fibrous light tone regions (see Fig. 7).

4. excitation light source may be used as step 3 cannot distinguish between different copy paper samples --- intense light source receives End --- cut-off colour filter length of a film leads to 715nm, further looks at the IR fluorescence phenomenon of copy paper presentation, i.e. intense light source video fluorescent Spectrum picture, and record preservation；The IR fluorescence phenomenon similarities and differences presented under the operating condition by comparing different copy papers, Further realize the identification of copy paper.

Identification result citing:

The fluorescence spectrum integral color of Blue.G warship five-pointed star copy paper sample is very dark, there are minute quantity and faint phosphor dot and Item (see Fig. 8)；The fluorescence spectrum integral color of capable Coral Sea's copy paper sample is also very dark, but there are more faint phosphor dots With item (see Fig. 9)；The fluorescence spectrum integral color of Blue.G warship Samsung copy paper sample is gloomy, and there are a small amount of phosphor dot and items (see Figure 10)；The fluorescence spectrum integral color of its chapter dragon copy paper sample is gloomy, and there are more phosphor dots and item (see Figure 11)； The fluorescence spectrum integral color of good print copy paper sample is greyish white, there is largely bright phosphor dot and item (see Figure 12)；Its Zhang Xin The fluorescence spectrum integral color of green copy paper sample is very bright, exists a large amount of bright and connects sheet of phosphor dot and item (see Figure 13).

5. the checking image after saving can realize observation, compare, the identification result of copy paper sample is obtained；It can also be used The tools such as matlab carry out more careful analysis to checking image.(remarks: in the system experimentation of early period, the utility model The copy paper that 20 kinds of different brands and model are examined using this method, according to the difference of video fluorescent spectrum picture can by this 20 Kind copy paper is divided into 12 classes, and is only capable of with UV Vis reflective spectrum method similar in the utility model method by 20 kinds of copy papers point For 5 classes.)

6. multiple positions should be selected to observe and record its fluorescence phenomenon and intensity when examining in same copy paper sample, with It prevents from unevenly testing result being caused to have deviation because of paper.(in the system experimentation of early period, same copy paper remarks: is not found The different parts fluorescence phenomenon of sample has differences)

Copy paper video fluorescent spectral test equipment according to the present utility model, obtainable beneficial effect include at least:

(1) equipment volume is small and exquisite, easy to carry.

(2) operating condition of the equipment and method do not have any pollution and damage to copy paper sample in checkout procedure.

(3) inspection process used in the equipment is easy to operate, the fluorescence phenomenon presented under each operating condition it is vertical equal as it can be seen that It can be realized the quick identification of copy paper sample.

In conjunction with the explanation and practice of the utility model disclosed here, the other embodiments of the utility model are for this field Technical staff will be readily apparent and understand.Illustrate and embodiment be regarded only as being exemplary, the utility model it is real Scope and spirit are defined in the claims.

Claims (10)

1. a kind of copy paper video fluorescent spectral test equipment, which is characterized in that the inspection equipment includes being arranged from top to bottom Display screen, host and objective table；

The host includes light-source system and imaging system, and the light-source system has floodlight source, long wave ultraviolet light source and Qiang Guang Source, the imaging system include camera；

The host further includes dispersion element, including being arranged in the first colour filter of the intense light source front end and being arranged in described take the photograph As the second colour filter of head front end；

The objective table is arranged at the imaging system lower position preset distance.

2. copy paper video fluorescent spectral test equipment according to claim 1, which is characterized in that the upper end of the host Face is equipped with control panel, has selection light-source system, the enlargement ratio for adjusting imaging system, records tests on the control panel Realtime graphic control button or knob.

3. copy paper video fluorescent spectral test equipment according to claim 1, which is characterized in that the inspection equipment is case Formula structure, at case lid, the host and objective table are located at cabinet the display location, the cabinet and the objective table pair The position answered is equipped with the opening that can place copy paper, and the case lid and the cabinet are pivotally connected.

4. copy paper video fluorescent spectral test equipment according to claim 1, which is characterized in that the floodlight source and institute Intense light source is stated using incandescent lamp, the long wave ultraviolet light source uses low-pressure steam discharge tube.

5. copy paper video fluorescent spectral test equipment according to claim 4, which is characterized in that the intense light source is cloth 1 incandescent lamp in the middle part of the host is set, having a size of 50cm, voltage 12V, power 100W；The floodlight source is cloth 4 incandescent lamps in the host surrounding are set, having a size of 16cm, voltage 12V, power 12.8W.

6. copy paper video fluorescent spectral test equipment according to claim 4, which is characterized in that the long wave ultraviolet light Source is 2 low-pressure steam discharge tubes for being arranged in the host two sides, power 9W.

7. copy paper video fluorescent spectral test equipment according to claim 1, which is characterized in that first colour filter Spectral region be 400nm~570nm, for through the strong light of blue；The spectral region of second colour filter be 520nm~ 780nm, through visible light and near infrared light.

8. copy paper video fluorescent spectral test equipment according to claim 1, which is characterized in that the imaging system is Cold infrared colo r numeral camera system built in the high-resolution of 10000000 pixels, enlargement ratio are 0~32, and spectral region is 400~1000nm.

9. copy paper video fluorescent spectral test equipment according to claim 1, which is characterized in that carry paper sample to be checked The specification of the objective table of product is 250mm × 320mm.

10. copy paper video fluorescent spectral test equipment according to claim 1, which is characterized in that the inspection equipment Having a size of 250 × 320 × 300mm.