CN102680100A - Portable type trace detection spectral imager - Google Patents
Portable type trace detection spectral imager Download PDFInfo
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- CN102680100A CN102680100A CN2012101921584A CN201210192158A CN102680100A CN 102680100 A CN102680100 A CN 102680100A CN 2012101921584 A CN2012101921584 A CN 2012101921584A CN 201210192158 A CN201210192158 A CN 201210192158A CN 102680100 A CN102680100 A CN 102680100A
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Abstract
The invention discloses a portable type trace detection spectral imager. The portable type trace detection spectral imager comprises a host case, an optical machine component arranged in the host case, a processor, a power module and an objective lens arranged outside the host case, wherein the optical machine component comprises a relay lens front component, a liquid crystal tunable light filter, a relay lens rear component and an array type solid detector which are sequentially connected; the objective lens is connected with the relay lens front component; the processor is respectively connected with the liquid crystal tunable light filter, the array type solid detector and the power module; optical axes of the relay lens front component, the relay lens rear component and the objective lens coincide; and the center of the liquid crystal tunable light filter is positioned on the optical axis, and the liquid crystal tunable light filter is vertical to the optical axis. The portable type trace detection spectral imager can be used for outputting a display result in real time and has the advantages of real time, small instrument volume, convenience in carrying, high sensitivity and no damage to a detected material.
Description
Technical field
The present invention relates to a kind of portable vestige detecting light spectrum imager, belong to optical, mechanical and electronic integration field and light spectrum image-forming field.
Background technology
The verification of traces technology is the important component part of science and technology concerning criminal matters and judicial inspection technology, simultaneously, extensive utilization is arranged also in administrative law enforcement with aspect dealing with civil litigation.The special technical method of modern vestige technical application; Vestige to the people relevant with crime dramas or thing stay investigates on the spot and identifies, for example to the check of impression of the hand, footprint, teeth mark, cartridge mark, tool mark, tyre mark, overall separation vestige and other special marks.The main task of verification of traces is to find, extract and save from damage various vestiges; The mechanism that the research vestige forms and with the getting in touch of crime dramas; Carry out establishing identity to confirm whether vestige belongs to a certain persona certa or thing is left over.
Fluorescent powder, combining powder appearance method, the smoked traditional detection methods such as decoration method, granule appearance method, suspension method appearance method that show of 502 glue are mainly adopted in traditional verification of traces at present; And technological means such as chemical analysis and DNA detection; Its sensitivity is low; And damage sample easily, more and more be not suitable for the demand of modern trace detection.
Optical tech has highly sensitive and does not damage the characteristics of sample, so, reconnoitring, checking for a lot of trace evidences; Various optical detections are customary first steps; The light spectrum image-forming technology combines imaging technique and spectral technique, when obtaining the two-dimensional space information of target, has also obtained the clarification of objective spectral information; Form data cube, improved the accuracy of check greatly.Yet domestic and international existing employing light spectrum image-forming technology is carried out the mode that vestige is surveyed, and mainly is with after the sample collection, under laboratory environment, surveys and discerns, and causes sense cycle long, is not suitable for on-the-spot the detection.
Based on this, how to invent a kind of portable vestige detecting light spectrum imager, easy to carry, can show testing result in real time, and highly sensitive, do not damage sample, be the problem that the present invention mainly solves.
Summary of the invention
The present invention provides a kind of portable vestige detecting light spectrum imager in order to solve the problem that does not also have at present a kind of high sensitivity, portable trace detection instrument, have highly sensitive, easy to carry, export the advantage of testing result in real time.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme to be achieved:
A kind of portable vestige detecting light spectrum imager; The object lens that comprise host housing, are arranged on lighting apparatus component, processor, the power module in the host housing and are arranged on the said host housing outside; Described lighting apparatus component is organized and the array solid probe after comprising the preceding group of the relay lens that connects successively, liquid crystal tunable optical filter, relay lens; Said object lens are connected with the preceding group of relay lens; Said processor is connected with liquid crystal tunable optical filter, array solid probe, power module respectively; Group, object lens three's optical axis coincidence behind group, the relay lens before the relay lens, being centered close on the described optical axis of liquid crystal tunable optical filter, and the liquid crystal tunable optical filter is vertical with this optical axis.
In order to export testing result in real time, described optical spectrum imagers also comprises the display screen that is connected with processor.
Further, operation for ease, and to the processor input of control commands, described display screen is a liquid crystal touch screen.
Further again, described lighting apparatus component also comprises base plate, and said base plate is provided with the fixed mount that is used for fixing the liquid crystal tunable optical filter, and the antetheca of fixed mount and rear wall leave light hole respectively.
Preferably, in order to make the adaptive multiple object lens of spectrometer, described imager also comprises adapter, and said adapter one end is connected with object lens, and an other end is connected with the preceding group of relay lens.
Further, described adapter is a tubular, and the one of which end is the standard C interface, is used to connect object lens, and an other end car has internal thread, and group is arranged in the adapter before the said relay lens, and the external thread that the shaft shoulder of group is got on the bus and is complementary with said internal thread before the relay lens.
Accordingly, described adapter is fixed on the antetheca of said fixed mount, and group is fixed on the rear wall of said fixed mount behind the relay lens.
Organize the both sides that are symmetricly set on the liquid crystal tunable optical filter before the described relay lens behind group and the relay lens,, can effectively eliminate the aberration that the liquid crystal tunable optical filter causes self for the liquid crystal tunable optical filter provides one section parallel light path.
Wherein, described array solid probe is ccd array, CMOS array or photodiode array.
Organize behind group and the relay lens before the described relay lens and be two telecentric systems.
Compared with prior art, advantage of the present invention and good effect are: portable vestige detecting light spectrum imager of the present invention, adopt the real-time acquisition process image of flush bonding processor; And can export demonstration in real time, have real-time, and the instrument volume is little; Easy to carry, can be carried into collection in worksite, indoor, field all can be used; In conjunction with on-the-spot output result's characteristics, bring great convenience to use, adopt optical tech to detect; Have highly sensitive and do not damage the characteristics of sample, in conjunction with imaging technique and spectral technique, when obtaining the two-dimensional space information of target; Also obtain the clarification of objective spectral information, formed data cube, improved the accuracy of check greatly; Have the vestige of discovery warning function, reduced because the erroneous judgement that operating personnel's subjective reason causes.
After the detailed description in conjunction with the advantages embodiment of the present invention, other characteristics of the present invention and advantage will become clearer.
Description of drawings
Fig. 1 is a kind of example structure synoptic diagram of portable vestige detecting light spectrum imager proposed by the invention;
Fig. 2 is host housing 1 an inner structure synoptic diagram among Fig. 1;
Fig. 3 is the structural representation of lighting apparatus component 2 among Fig. 2;
Fig. 4 is the index path of the portable vestige detecting light spectrum imager among the embodiment one;
Fig. 5 is the explosive view of lighting apparatus component 2 among Fig. 2.
Embodiment
Do explanation in further detail below in conjunction with the accompanying drawing specific embodiments of the invention.
Embodiment one; Referring to Fig. 1, shown in Figure 2; A kind of portable vestige detecting light spectrum imager of present embodiment; Comprise host housing 1, be arranged on lighting apparatus component 2, processor 3, power module 4 in the host housing 1 and the object lens 6 that are arranged on said host housing 1 outside, referring to shown in Figure 3, described lighting apparatus component 2 comprises organizes 23 and array solid probe 24 behind group 21 before the relay lens that connects successively, liquid crystal tunable optical filter 22, the relay lens; Said object lens 6 are connected with the preceding group 21 of relay lens; Said processor 3 is connected with liquid crystal tunable optical filter 22, array solid probe 24, power module 4 respectively, referring to shown in Figure 4, organizes 23 before the relay lens behind group 21, the relay lens, object lens 6 threes' optical axis coincidence; Being centered close on the described optical axis of liquid crystal tunable optical filter 22, and liquid crystal tunable optical filter 22 is vertical with this optical axis.
In order to export testing result in real time, referring to shown in Figure 1, the optical spectrum imagers of present embodiment also comprises display screen 7; This display screen is connected with processor 3, operation for ease, and to the processor input of control commands; Described display screen is a liquid crystal touch screen; This liquid crystal touch screen comprises human-computer interaction interface, and operating personnel can control processor 3 through touch-screen, accomplishes the operations to processor.The processor 3 preferred flush bonding processors that adopt, the operating instruction of liquid crystal tunable optical filter 22 and array solid probe 24 sends by processor 3, and data can be through the transmission of usb communication module.Wherein the view data of the collection of array solid probe 24 is also passed processor 3 back through same usb communication module, is stored in the storer.Liquid crystal tunable optical filter 22 and array solid probe 24 synchro control; Array solid probe 24 postpones a period of time than liquid crystal tunable optical filter 22; Be specially the tuning stabilization time of liquid crystal tunable optical filter 22; Liquid crystal tunable optical filter 22 of every adjustment is treated array solid probe 24 exposures of stable back once.Described array solid probe 24 can be ccd array, CMOS array or photodiode array.The imager of present embodiment also has the vestige of discovery warning function, through an alarm unit is set, is connected with processor 3, and when processor 3 was found vestige, the control alarm unit was reported to the police.
The principle of work of the portable vestige detecting light spectrum imager of present embodiment is: by organize 21 before object lens 6, the relay lens, group 23 is formed behind the relay lens optical imaging system is target imaging to be analyzed; The image planes position overlaps with the object space focal plane of the preceding group 22 of relay lens; Organize 22 with target beam collimation before the relay lens this moment, and promptly the light beam of group 22 back is a parallel beam before relay lens.Place liquid crystal tunable optical filter 22 in the parallel light path before relay lens after the group 22; Through the adjustment driving voltage; Can change the centre wavelength that sees through of liquid crystal tunable optical filter 22, also be that liquid crystal tunable optical filter 22 is at following light signal through the specific light spectral coverage of control signal control., liquid crystal tunable optical filter 22 backs organize 23 after placing relay lens; Group 23 will be converged to picture through the parallel beam that filters behind the relay lens; This imaging surface overlaps with the target surface of array solid probe 24, thereby array solid probe 24 can obtain the monochrome image through 22 filtrations of liquid crystal tunable optical filter.The spectrum picture signal that array solid probe 24 receives converts digital picture to through the image acquisition units in the processor 3 and is stored in the storage medium.Processor 3 sends the control panel of instruction through liquid crystal tunable optical filter 22 and regulates and be added in the voltage on the liquid crystal tunable optical filter 22, changes the centre wavelength that liquid crystal tunable optical filter 22 sees through.Need to prove that the portable vestige detecting light spectrum imager of present embodiment also can be controlled this instrument by external computing machine.In addition, this instrument can adopt two kinds of mode of operations, and first kind of pattern is target search pattern; Liquid crystal tunable optical filter 22 is arranged on a certain specific wavelength, 24 pairs of target imagings of array solid probe, this moment can mobile host; Different target is carried out forming monochrome image; This mode is accomplished search that can target, when find that can target the time, system can point out in display image.Second kind of pattern is the light spectrum image-forming pattern; Behind lock onto target; With the main frame stationkeeping, adjust the wavelength that sees through of liquid crystal tunable optical filter 22, carry out the collection and the preservation of different spectral coverage sequence image; The program of carrying is analyzed spectrum picture on the main frame capable of using, also can images acquired be downloaded to computing machine and further analyze.And this analysis appearance can be realized the adjustment of self-adaptation time shutter in the light spectrum image-forming process, to reach maximum signal to noise ratio (S/N ratio).
Adopt the liquid crystal tunable light filter to obtain element in the present embodiment as spectrum picture; Liquid crystal tunable optical filter 22 through electric tuning; Compare traditional mechanical rotating filtering sheet mode; The runner that do not need repeatedly to circulate obtains the spectrum picture of one group of narrow bandwidth, but the Rapid Realization wave band is tuning, and higher spatial resolution and spectral resolution are arranged.This optical spectrum imagers is under the spectrum obtaining mode; The liquid crystal tunable light filter filters to the light that gets into rear end array solid probe according to the fixed step size spectral coverage at interval; And the array solid probe can be accepted the narrow-band spectrum through filtering successively, can realize the collection of the full spectral coverage spectroscopic data that a kind of movement-less part is static through single pass.
Referring to shown in Figure 5; A kind of concrete wiring layout for the lighting apparatus component 2 that provides in the present embodiment; For ease lighting apparatus component 2 is fixed in the host housing 1, and increases fixing steadiness, be corrupted to optical device when preventing to move instrument; Also comprise base plate 8; And said base plate 8 is provided with the fixed mount 9 that is used for fixing liquid crystal tunable optical filter 22, and the antetheca of fixed mount 9 and rear wall leave light hole 91 respectively, its caliber size preferably with relay lens before group 23 is connected an end with it behind group 21 or the relay lens bore match.Use screw or other immobilising devices to be fixed in the host housing 1 base plate 8.23 liang of groups of group structures are identical, interchangeable behind preceding group 21 of relay lens and the relay lens, the two symmetrical placement, and the effect that the preceding group 22 of relay lens plays the target beam collimation, group 23 plays the effect that the parallel beam that warp is filtered is converged to picture behind the relay lens.
For the scope of application of enhanced spectrum imager, described imager also comprises adapter 10, and said adapter 10 1 ends are connected with object lens 6, and an other end is connected with the preceding group 21 of relay lens.Object lens 6 are common photographic lens, can be commercial phtographic lens or industrial lens, and interface is public mouthful of a standard C interface, perhaps can convert the standard C interface into through adapter 10.Female mouthful of standard C interface on object lens 6 and the host housing 1 is connected.Further; Described adapter 10 is a tubular, and the one of which end is the standard C interface, is used to connect object lens 6; An other end car has internal thread; Group 22 is arranged in the adapter 10 before the said relay lens, and the external thread that the shaft shoulder 11 of group is got on the bus and is complementary with said internal thread before the relay lens, is convenient to group 22 before the relay lens fixing with adapter 10.Adapter 10 is fixed on the antetheca of described fixed mount 9, can uses holding screw or other fixtures to fix, adapter 10 preferably is provided with adapter pad 12 with the junction of the antetheca of fixed mount 9, to organize 22 before the protection relay lens.Because group 23 need not to connect adapter behind the relay lens, therefore, can be fixed on the rear wall of said fixed mount 9.
Organize design before the described relay lens behind group and the relay lens and adopt the two telecentric systems of object space and picture side to design, and then can mate the preposition camera lens of standard C interface of different exit pupil positions, magnification is-1.
Certainly; Above-mentioned explanation is not to be limitation of the present invention; The present invention also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also should belong to protection scope of the present invention.
Claims (10)
1. portable vestige detecting light spectrum imager; It is characterized in that: the object lens that comprise host housing, are arranged on lighting apparatus component, processor, the power module in the host housing and are arranged on the said host housing outside; Described lighting apparatus component is organized and the array solid probe after comprising the preceding group of the relay lens that connects successively, liquid crystal tunable optical filter, relay lens; Said object lens are connected with the preceding group of relay lens; Said processor is connected with liquid crystal tunable optical filter, array solid probe, power module respectively; Group, object lens three's optical axis coincidence behind group, the relay lens before the relay lens, being centered close on the described optical axis of liquid crystal tunable optical filter, and the liquid crystal tunable optical filter is vertical with this optical axis.
2. imager according to claim 1 is characterized in that: described imager also comprises the display screen that is connected with processor.
3. imager according to claim 2 is characterized in that: described display screen is a liquid crystal touch screen.
4. imager according to claim 1 is characterized in that: described lighting apparatus component also comprises base plate, and said base plate is provided with the fixed mount that is used for fixing the liquid crystal tunable optical filter, and the antetheca of fixed mount and rear wall leave light hole respectively.
5. imager according to claim 4 is characterized in that: described imager also comprises adapter, and said adapter one end is connected with object lens, and an other end is connected with the preceding group of relay lens.
6. imager according to claim 5; It is characterized in that: described adapter is a tubular; The one of which end is the standard C interface, is used to connect object lens, and an other end car has internal thread; Group is arranged in the adapter before the said relay lens, and the external thread that the shaft shoulder of group is got on the bus and is complementary with said internal thread before the relay lens.
7. imager according to claim 6 is characterized in that: described adapter is fixed on the antetheca of said fixed mount, and group is fixed on the rear wall of said fixed mount behind the relay lens.
8. imager according to claim 1 is characterized in that: organize the both sides that are symmetricly set on the liquid crystal tunable optical filter before the described relay lens behind group and the relay lens.
9. imager according to claim 1 is characterized in that: described array solid probe is ccd array, CMOS array or photodiode array.
10. imager according to claim 1 is characterized in that: organizing behind group and the relay lens before the described relay lens is two telecentric systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101921584A CN102680100A (en) | 2012-06-12 | 2012-06-12 | Portable type trace detection spectral imager |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101921584A CN102680100A (en) | 2012-06-12 | 2012-06-12 | Portable type trace detection spectral imager |
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| CN102680100A true CN102680100A (en) | 2012-09-19 |
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| CN2012101921584A Pending CN102680100A (en) | 2012-06-12 | 2012-06-12 | Portable type trace detection spectral imager |
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| CN114112035A (en) * | 2021-12-07 | 2022-03-01 | 长春理工大学 | Portable LCTF imaging camera and imaging method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109443535A (en) * | 2018-10-30 | 2019-03-08 | 浙江大学 | A kind of underwater microspectrum imaging device and method based on fast illuminated spectrum camera |
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| CN114047791A (en) * | 2021-11-08 | 2022-02-15 | 福州大学 | Optical filter rotating wheel rapid imaging control system based on embedded real-time operating system and control method thereof |
| CN114047791B (en) * | 2021-11-08 | 2023-12-15 | 福州大学 | Optical filter runner rapid imaging control system based on embedded real-time operating system and control method thereof |
| CN114112035A (en) * | 2021-12-07 | 2022-03-01 | 长春理工大学 | Portable LCTF imaging camera and imaging method |
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Application publication date: 20120919 |