CN202661170U - Portable trace detection hyperspectral imager - Google Patents
Portable trace detection hyperspectral imager Download PDFInfo
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- CN202661170U CN202661170U CN201220275143XU CN201220275143U CN202661170U CN 202661170 U CN202661170 U CN 202661170U CN 201220275143X U CN201220275143X U CN 201220275143XU CN 201220275143 U CN201220275143 U CN 201220275143U CN 202661170 U CN202661170 U CN 202661170U
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- relay lens
- liquid crystal
- optical filter
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- crystal tunable
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Abstract
The utility model discloses a portable trace detection hyperspectral imager. The portable trace detection hyperspectral imager comprises a main unit shell, an X ray machine assembly arranged in the main unit shell, a processor, a power module and an objective lens arranged outside the main unit shell; the X ray machine assembly comprises a relay lens front assembly, a liquid crystal tunable optical filter, a relay lens rear assembly, and an array type solid detector which are sequentially connected; the objective lens is connected with the relay lens front assembly; the processor is connected with the liquid crystal tunable optical filter, the array type solid detector and the power module respectively; optical axes of the relay lens front assembly, the relay lens rear assembly, and the objective lens are coincided; and the center of the liquid crystal tunable optical filter is positioned on the optical axis, and the liquid crystal tunable optical filter is perpendicular to the optical axis. The portable trace detection hyperspectral imager can output a display result in real time, and has the advantages of real time performance, small size, convenience in carrying, high flexibility and capacity of not damaging materials to be detected.
Description
Technical field
The utility model relates to a kind of portable vestige detecting light spectrum imager, belongs 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 technical method of modern vestige technology application specific, the vestige that the people relevant with crime dramas or thing stay is investigated on the spot and identified, 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 contacting of crime dramas; Carry out establishing identity to determine whether vestige belongs to a certain particular person or thing is left over.
Traditional detection methods such as fluorescent powder, combining powder appearance method, the smoked aobvious decoration method of 502 glue, granule appearance method, suspension method appearance method are mainly adopted at present traditional verification of traces, and the technological means such as chemical analysis and DNA detection, its sensitivity is low, and easily damage sample, more and more be not suitable for the demand of modern trace detection.
The light technology has highly sensitive and does not damage the characteristics of sample, so, reconnoitring, checking for a lot of trace evidences, various optical detections are routine 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, greatly improved the accuracy of check.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, surveys under laboratory environment and identifies, and causes sense cycle long, is not suitable for Site Detection.
Based on this, how a kind of portable vestige detecting light spectrum imager of utility model is easy to carry, can show in real time testing result, and highly sensitive, do not damage sample, be the problem that the utility model mainly solves.
Summary of the invention
The utility model provides a kind of portable vestige detecting light spectrum imager in order to solve the problem that does not also have a kind of high sensitivity, portable trace detection instrument at present, has advantages of highly sensitive, easy to carry, real-time output detections result.
In order to solve the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of portable vestige detecting light spectrum imager, comprise host housing, be arranged on the lighting apparatus component in the host housing, processor, power module, and the object lens that are arranged on the described host housing outside, described lighting apparatus component is organized before comprising the relay lens that connects successively, the liquid crystal tunable optical filter, organize behind the relay lens, and array solid probe, described object lens are connected with group before the relay lens, described processor respectively with the liquid crystal tunable optical filter, the array solid probe, power module connects, group before the relay lens, organize behind the relay lens, object lens three's optical axis coincidence, 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.
For real-time output detections result, described optical spectrum imagers also comprises the display screen that is connected with processor.
Further, for handled easily, and to the processor input of control commands, described display screen is liquid crystal touch screen.
Further again, described lighting apparatus component also comprises base plate, and described base plate is provided with for the fixing fixed mount of liquid crystal tunable optical filter, and the antetheca of fixed mount and rear wall leave respectively light hole.
Preferably, in order to make the adaptive multiple object lens of spectrometer, described imager also comprises adapter, and described adapter one end is connected with object lens, and an other end is connected with group before the relay lens.
Further, described adapter is tubular, and the one end is the standard C interface, be used for to connect object lens, and an other end car has internal thread, and group is arranged in the adapter before the described relay lens, and the external thread that the shaft shoulder of group is got on the bus and is complementary with described internal thread before the relay lens.
Accordingly, described adapter is fixed on the antetheca of described fixed mount, and group is fixed on the rear wall of described 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, for the liquid crystal tunable optical filter provides one section parallel light path, can effectively eliminate the aberration that the liquid crystal tunable optical filter causes self.
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 utility model and good effect are: portable vestige detecting light spectrum imager of the present utility model, adopt the flush bonding processor Real-time Collection to process image, and real-time output display, has real-time, and the instrument volume is little, easy to carry, can be carried into collection in worksite, indoor, the field all can be used, in conjunction with the characteristics of on-the-spot Output rusults, bring great convenience to use, adopt the light technology 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, greatly improved the accuracy of check; Have the vestige of discovery warning function, reduced because the erroneous judgement that operating personnel's subjective reason causes.
After reading by reference to the accompanying drawings the detailed description of the utility model embodiment, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is a kind of example structure schematic diagram of the portable vestige detecting light spectrum imager that proposes of the utility model;
Fig. 2 is host housing 1 inner structure schematic 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
Below in conjunction with accompanying drawing embodiment of the present utility model is described in more detail.
Embodiment one, referring to Fig. 1, shown in Figure 2, a kind of portable vestige detecting light spectrum imager of the present embodiment, comprise host housing 1, be arranged on the lighting apparatus component 2 in the host housing 1, processor 3, power module 4, and the object lens 6 that are arranged on described host housing 1 outside, referring to shown in Figure 3, described lighting apparatus component 2 organizes 21 before comprising the relay lens that connects successively, liquid crystal tunable optical filter 22, organize 23 behind the relay lens, and array solid probe 24, described object lens 6 are connected with group 21 before the relay lens, described processor 3 respectively with liquid crystal tunable optical filter 22, array solid probe 24, power module 4 connects, referring to shown in Figure 4, group 21 before the relay lens, organize 23 behind 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.
For real-time output detections result, referring to shown in Figure 1, the optical spectrum imagers of the present embodiment also comprises display screen 7, this display screen is connected with processor 3, for handled easily, and to the processor input of control commands, described display screen is liquid crystal touch screen, this liquid crystal touch screen comprises human-computer interaction interface, and operating personnel can control processor 3 by touch-screen, finish 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 by the transmission of usb communication module.Wherein the view data of the collection of array solid probe 24 is also passed processor 3 back by 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, until stable rear array solid probe 24 exposures once.Described array solid probe 24 can be ccd array, CMOS array or photodiode array.The imager of the present embodiment also has the vestige of discovery warning function, by 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 the present embodiment is: by organize 21 before object lens 6, the relay lens, behind the relay lens group 23 optical imaging systems that form with target imaging to be analyzed, the image planes position overlaps with the object space focal plane of the front group 22 of relay lens, organize 22 this moment before the relay lens with the target beam collimation, namely the light beam of group 22 back is parallel beam before relay lens.Place liquid crystal tunable optical filter 22 in the parallel light path before relay lens after the group 22, by adjusting 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 lower light signal by the specific light spectral coverage of control signal control.Behind liquid crystal tunable optical filter 22 rear placement relay lenses, organize 23, group 23 is converged to picture with filtered parallel beam 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 by the image acquisition units in the processor 3 and is stored in the storage medium.Processor 3 sends instruction and regulates the voltage that is added on the liquid crystal tunable optical filter 22 by the control panel of liquid crystal tunable optical filter 22, changes the centre wavelength that liquid crystal tunable optical filter 22 sees through.Need to prove, the portable vestige detecting light spectrum imager of the present embodiment also can be controlled this instrument by external computing machine.In addition, this instrument can adopt two kinds of mode of operations, the first 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 finished search that can target, when find that can target the time, system can point out in showing image.The second pattern is the light spectrum image-forming pattern, behind lock onto target, position of host machine is fixed, adjust the wavelength that sees through of liquid crystal tunable optical filter 22, carry out collection and the preservation of different spectral coverage sequence image, can utilize the program of carrying on the main frame that spectrum picture is analyzed, also can be further analyzed gathering download image to computing machine.And this analysis instrument can be realized the adjustment of adpative exposure time in the light spectrum image-forming process, to reach maximum signal to noise ratio (S/N ratio).
Adopt in the present embodiment the liquid crystal tunable light filter to obtain element as spectrum picture, liquid crystal tunable optical filter 22 by 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, can realize fast that wave band is tuning, has higher spatial resolution and spectral resolution.This optical spectrum imagers is under the spectrum obtaining mode, the liquid crystal tunable light filter filters to the light that enters rear end array solid probe according to fixed step size spectral coverage interval, and the array solid probe can be accepted the narrow-band spectrum through filtering successively, can realize a kind of collection of full spectral coverage spectroscopic data of movement-less part static state by 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 convenient lighting apparatus component 2 is fixed in the host housing 1, and the fixing steadiness of increase, be corrupted to optical device when preventing from moving instrument, also comprise base plate 8, and described base plate 8 is provided with for the fixing fixed mount 9 of liquid crystal tunable optical filter 22, the antetheca of fixed mount 9 and rear wall leave respectively light hole 91, 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 structure is identical, interchangeable behind front group 21 of relay lens and the relay lens, the two symmetrical placement, and group 22 plays the effect with the target beam collimation before the relay lens, and group 23 plays the effect that filtered parallel beam is converged to picture behind the relay lens.
For the scope of application of enhanced spectrum imager, described imager also comprises adapter 10, and described adapter 10 1 ends are connected with object lens 6, and an other end is connected with group 21 before the relay lens.Object lens 6 are common photographic lens, can be commercial phtographic lens or industrial lens, and interface is public mouthful of standard C interface, perhaps can be converted to the standard C interface by adapter 10.Female mouthful of standard C interface on object lens 6 and the host housing 1 is connected.Further, described adapter 10 is tubular, the one end is the standard C interface, be used for connecting object lens 6, an other end car has internal thread, group 22 is arranged in the adapter 10 before the described relay lens, and the external thread that the shaft shoulder 11 of group is got on the bus and is complementary with described 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 be fixed, 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 described 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 to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement also should belong to protection domain of the present utility model.
Claims (10)
1. portable vestige detecting light spectrum imager, it is characterized in that: comprise host housing, be arranged on the lighting apparatus component in the host housing, processor, power module, and the object lens that are arranged on the described host housing outside, described lighting apparatus component is organized before comprising the relay lens that connects successively, the liquid crystal tunable optical filter, organize behind the relay lens, and array solid probe, described object lens are connected with group before the relay lens, described processor respectively with the liquid crystal tunable optical filter, the array solid probe, power module connects, group before the relay lens, organize behind the relay lens, object lens three's optical axis coincidence, 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, it is characterized in that: described imager also comprises the display screen that is connected with processor.
3. imager according to claim 2, it is characterized in that: described display screen is liquid crystal touch screen.
4. imager according to claim 1, it is characterized in that: described lighting apparatus component also comprises base plate, and described base plate is provided with for the fixing fixed mount of liquid crystal tunable optical filter, and the antetheca of fixed mount and rear wall leave respectively light hole.
5. imager according to claim 4, it is characterized in that: described imager also comprises adapter, and described adapter one end is connected with object lens, and an other end is connected with group before the relay lens.
6. imager according to claim 5, it is characterized in that: described adapter is tubular, the one end is the standard C interface, be used for connecting object lens, an other end car has internal thread, group is arranged in the adapter before the described relay lens, and the external thread that the shaft shoulder of group is got on the bus and is complementary with described internal thread before the relay lens.
7. imager according to claim 6, it is characterized in that: described adapter is fixed on the antetheca of described fixed mount, and group is fixed on the rear wall of described 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, it 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: before the described relay lens behind group and the relay lens group be two telecentric systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220275143XU CN202661170U (en) | 2012-06-12 | 2012-06-12 | Portable trace detection hyperspectral imager |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220275143XU CN202661170U (en) | 2012-06-12 | 2012-06-12 | Portable trace detection hyperspectral imager |
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| Publication Number | Publication Date |
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| CN202661170U true CN202661170U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220275143XU Expired - Lifetime CN202661170U (en) | 2012-06-12 | 2012-06-12 | Portable trace detection hyperspectral imager |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758523A (en) * | 2016-03-25 | 2016-07-13 | 浙江大学 | Hyperspectral imaging device based on rotary high-speed spectrum channel switching |
-
2012
- 2012-06-12 CN CN201220275143XU patent/CN202661170U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758523A (en) * | 2016-03-25 | 2016-07-13 | 浙江大学 | Hyperspectral imaging device based on rotary high-speed spectrum channel switching |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |