CN104089878A - Transmissometer - Google Patents
Transmissometer Download PDFInfo
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- CN104089878A CN104089878A CN201410339390.5A CN201410339390A CN104089878A CN 104089878 A CN104089878 A CN 104089878A CN 201410339390 A CN201410339390 A CN 201410339390A CN 104089878 A CN104089878 A CN 104089878A
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- light source
- transilluminator
- signal
- halogen lamp
- light
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Abstract
The invention discloses a transmissometer. The transmissometer comprises a light source, a condensing reflection device arranged in back of the light source and a signal acquisition device arranged in front of the light source, wherein a condensing device is arranged between the signal acquisition device and the light source. According to the technical scheme, a low-cost halogen lamp is used as the light source, so that the problem of over-high price of a xenon lamp can be solved. The halogen lamp serving as the light source affects the signal-to-noise ratio of the transmissometer, and in order to solve the problem of the signal-to-noise ratio, the transmissometer in the technical scheme comprises the condensing device. The condensing device can condense light emitted by the halogen lamp in a transmitted sample, so as to effectively solve the problem of over low signal-to-noise ratio of the transmissometer when the halogen lamp is used as the light source.
Description
Technical field
The present invention relates to a kind of optical detection apparatus, espespecially a kind of transilluminator having compared with high s/n ratio.
Background technology
Signal to noise ratio (S/N ratio) (Signal-to-Noise Ratio, SNR) is an important performance indexes of transilluminator.In general, signal to noise ratio (S/N ratio) is larger, illustrates that the noise being mixed in signal is less, otherwise when signal to noise ratio (S/N ratio) is low, during small-signal input, noise is serious, may cause distinguishing the value of noise and output signal, thereby greatly reduces the accuracy of test.Existing transilluminator light source is generally halogen light source, its luminous intensity in 400nm to 500nm scope well below it intensity in the above wavelength coverage of 500nm, this makes in 400nm to 500nm scope signal to noise ratio (S/N ratio) lower, thereby cause this wavelength coverage build-in test credible result degree greatly to reduce even, cannot measure actual value.For the problems referred to above industry method that employing is replaced by xenon lamp by Halogen lamp LED conventionally, solve.Xenon source is to utilize xenon gaseous discharge and luminous electric light source.The spectral distribution that xenon lamp is continuous spectrum part almost changes and has nothing to do with lamp power input, and in lifetime, spectral power distribution is also almost constant.The optical, electrical parameter consistency of xenon lamp is good, and duty is subject to the impact of change of external conditions little.Xenon lamp radiation spectral power distribution and daylight are close, and colour temperature is about 6000K.Therefore, xenon lamp lamp source all has good signal to noise ratio (S/N ratio) in whole visible-range, but its price exceeds decades of times compared with Halogen lamp LED, and needs good cooling system.Therefore the method for, developing other raising transilluminator signal to noise ratio (S/N ratio) will be conducive to reduce equipment operating cost.
Summary of the invention
The object of the present invention is to provide a kind of transilluminator having compared with high s/n ratio, it adopts simple optical means to improve the signal to noise ratio (S/N ratio) of transilluminator, to strengthen power of test and the test accuracy of transilluminator.
In order to address the above problem, it comprises to the invention provides a kind of transilluminator: light source; Be arranged at the condensing reflection device at described light source rear; Be arranged at the signal collection device in described light source the place ahead; Between described signal collection device and described light source, be provided with beam condensing unit.
The further improvement of transilluminator of the present invention is: described light source is Halogen lamp LED.
The further improvement of transilluminator of the present invention is: the reference color temperature of described Halogen lamp LED is 2800K to 4000K.
The further improvement of transilluminator of the present invention is: described condensing reflection device is the device of optically focused concave mirror or similar half integrating sphere.
The further improvement of transilluminator of the present invention is: described beam condensing unit comprises convex lens, and described light source overlaps with the focus of described convex lens.
The further improvement of transilluminator of the present invention is: described beam condensing unit also comprises and is arranged in described convex lens away from the bright enhancement film of a side of described light source.
The further improvement of transilluminator of the present invention is: described bright enhancement film is to utilize micro-reproduction technology to be produced on the prism structure that acryl resin is made the optical thin film that on PET base material, manufacture forms, and its surface is to be highly the micro-prism structure of 20 microns to 50 microns.
Technical scheme of the present invention adopts Halogen lamp LED cheaply as light source, can avoid like this problem of xenon lamp selling at exorbitant prices.And adopt Halogen lamp LED as light source, can affect the signal to noise ratio (S/N ratio) of transilluminator, in order to solve in the problem technical scheme of the present invention of signal to noise ratio (S/N ratio), comprise a beam condensing unit.The light that the employing of beam condensing unit can be sent Halogen lamp LED concentrates on the sample being transmitted, and can effectively solve like this in Halogen lamp LED too low problem of transilluminator signal to noise ratio (S/N ratio) during as light source.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of transilluminator of the present invention;
Fig. 2 is the index path of the first embodiment of transilluminator of the present invention
Fig. 3 is the structural representation of the second embodiment of transilluminator of the present invention
Fig. 4 is the sample of transilluminator test in the prior art transmittance curve in visible-range;
Fig. 5 is the transmitted light light intensity curve that in prior art, transilluminator passes test sample;
Fig. 6 is the sample of transilluminator test in the first embodiment of the invention transmittance curve in visible-range;
Fig. 7 is the transmitted light light intensity curve that in first embodiment of the invention, transilluminator passes test sample;
Fig. 8 is the sample of transilluminator test in the second embodiment of the invention transmittance curve in visible-range; And
Fig. 9 is the transmitted light light intensity curve that in second embodiment of the invention, transilluminator passes test sample.
Embodiment
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this instructions.The present invention can also be implemented or be applied by other different embodiment, and the every details in this instructions also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
It should be noted that, appended graphic the illustrated structure of this instructions, ratio, size etc., equal contents in order to coordinate instructions to disclose only, for person skilled in the art scholar, understand and read, not in order to limit the enforceable qualifications of the present invention, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, not affecting under the effect that the present invention can produce and the object that can reach, all should still drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, in this instructions, quote as " on ", the term of D score, " left side ", " right side ", " centre " and " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under without essence change technology contents, when being also considered as the enforceable category of the present invention.
Below in conjunction with accompanying drawing and embodiment, the present invention is further detailed explanation.
Fig. 1 and the first embodiment that Figure 2 shows that transilluminator of the present invention.As depicted in figs. 1 and 2, transilluminator of the present invention comprises: light source 10; Be arranged at the condensing reflection device 20 at light source 10 rears; Be arranged at the signal collection device 40 in light source 10 the place aheads; Between signal collection device 40 and light source 10, be provided with beam condensing unit 30.Wherein: light source 10 is Halogen lamp LED, the reference color temperature of Halogen lamp LED is 2800K to 4000K; The condensing reflection device 20 that install at the rear of light source 10 is the optically focused concave mirror of sphere or the device of half integrating sphere for inside surface, the light directive all directions that light source 10 sends, condensing reflection device 20 can converge reflection by the light of directive all directions, the light directive beam condensing unit 30 after reflection; In the present embodiment, beam condensing unit 30 is convex lens, the optical axis of these convex lens is through light source 10, and light source 10 is positioned at the focus of these convex lens, the light that light source sends is directive beam condensing unit 30 after the reflection of condensing reflection device 20, the light that beam condensing unit 30 can send light source 10 is further gathered, through the light directive translucent sample 50 of gathering; After light penetration translucent sample 50, inject signal collection device 40.
The light path of transilluminator of the present invention as shown in Figure 2, the light of injecting beam condensing unit 30 is divided into two parts: wherein a part is the diverging light being sent by the light source 10 that is positioned at the focus place of convex lens, and this part light becomes directional light and injects translucent sample 50 after the refraction of convex lens; Another part light directive beam condensing unit 30 after the reflection of condensing reflection device 20 wherein, this part light is the focus of convex lens only, but convex lens can converge this part light directive translucent sample 50.The light that Halogen lamp LED sends after the beam condensing unit 30 being comprised of convex lens is collected at less region, can improve like this luminous intensity of the light that is irradiated to translucent sample 50, thereby improves the signal to noise ratio (S/N ratio) of transilluminator.
Figure 3 shows that the second embodiment of the present invention, it is that from the key distinction of the first embodiment both structures of beam condensing unit 30 are different.In the second embodiment, beam condensing unit 30 comprises a convex lens 31, at beam condensing unit 30, near a side of translucent sample 50, be also provided with bright enhancement film 32 (Brightness Enhancement Film, BEF), bright enhancement film 32 is to utilize micro-reproduction technology, the prism structure that acryl resin is made is produced on the optical thin film that on PET base material, manufacture forms, and its surface is to be highly the micro-prism structure of 20 microns～50 microns of left and right.According to geometric optical theory, the light of light source 10 outgoing, through the ringing of bright enhancement film 32 and condensing reflection device 20, finally converges in positive apparent direction outgoing, thereby reaches brightening effect.Thereby the more parallel signal to noise ratio (S/N ratio) that effectively improves transilluminator of light that the arranging of bright enhancement film 32 can make beam condensing unit 30 penetrate.
Fig. 4 is test sample tranmittance curve in visible-range of transilluminator in prior art, and Fig. 5 is the transmitted light light intensity curve that in prior art, transilluminator passes test sample.Test sample is one to be coated with the translucent glass substrate that thickness is the 25nm coat of metal, from Fig. 4 and Fig. 5, in the scope that the transilluminator of prior art is 400nm to 500nm at wavelength, signal to noise ratio (S/N ratio) is very low, the light intensity that spectrometer is collected in this wavelength band is only 50 to 200, and now the signal to noise ratio (S/N ratio) of transilluminator is lower.
Fig. 6 is the sample of transilluminator test in the first embodiment of the invention transmittance curve in visible-range; Fig. 7 is the transmitted light light intensity curve that in first embodiment of the invention, transilluminator passes test sample.As shown in Figure 6 and Figure 7, increasing the signal to noise ratio (S/N ratio) of convex lens this sample afterwards in wavelength is 400nm to 500nm scope increases.The light intensity that spectrometer is collected in this wavelength band is 200 to 1000, by experimental data being processed to the signal to noise ratio (S/N ratio) of transilluminator in known the present embodiment, compared to the prior art has the lifting of 5 times.
Fig. 8 is the sample of transilluminator test in the second embodiment of the invention transmittance curve in visible-range; Fig. 9 is the transmitted light light intensity curve that in second embodiment of the invention, transilluminator passes test sample.As shown in Figure 8 and Figure 9, after Halogen lamp LED bottom increases catoptron, the signal to noise ratio (S/N ratio) of transilluminator in wavelength is 400nm to 500nm scope compared remarkable lifting with the first embodiment, the light intensity of collecting in the scope that spectrometer is 400nm to 500nm at wavelength is 500 to 2000, known by test data is processed, in the second embodiment, the signal to noise ratio (S/N ratio) of transilluminator is about 10 times of prior art.
Technical scheme of the present invention adopts Halogen lamp LED cheaply as light source, can avoid like this problem of xenon lamp selling at exorbitant prices.And adopt Halogen lamp LED as light source, can affect the signal to noise ratio (S/N ratio) of transilluminator, in order to solve in the problem technical scheme of the present invention of signal to noise ratio (S/N ratio), comprise a beam condensing unit.The light that the employing of beam condensing unit can be sent Halogen lamp LED concentrates on the sample being transmitted, and can effectively solve like this in Halogen lamp LED too low problem of transilluminator signal to noise ratio (S/N ratio) during as light source.
Below embodiment has been described in detail the present invention by reference to the accompanying drawings, and those skilled in the art can make many variations example to the present invention according to the above description.Thereby some details in embodiment should not form limitation of the invention, the present invention will be usingd scope that appended claims defines as protection scope of the present invention.
Claims (7)
1. a transilluminator, is characterized in that, comprising: light source; Be arranged at the condensing reflection device at described light source rear; Be arranged at the signal collection device in described light source the place ahead; Between described signal collection device and described light source, be provided with beam condensing unit.
2. transilluminator as claimed in claim 1, is characterized in that: described light source is Halogen lamp LED.
3. transilluminator as claimed in claim 1, is characterized in that: the reference color temperature of described Halogen lamp LED is 2800K to 4000K.
4. transilluminator as claimed in claim 1, is characterized in that: described condensing reflection device is the device of optically focused concave mirror or half integrating sphere.
5. transilluminator as claimed in claim 1, is characterized in that: described beam condensing unit comprises convex lens, and described light source overlaps with the focus of described convex lens.
6. transilluminator as claimed in claim 5, is characterized in that: described beam condensing unit also comprises and is arranged in described convex lens away from the bright enhancement film of a side of described light source.
7. transilluminator as claimed in claim 6, it is characterized in that: described bright enhancement film is to utilize micro-reproduction technology to be produced on the prism structure that acryl resin is made the optical thin film that on PET base material, manufacture forms, and its surface is to be highly the micro-prism structure of 20 microns to 50 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410339390.5A CN104089878A (en) | 2014-07-16 | 2014-07-16 | Transmissometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410339390.5A CN104089878A (en) | 2014-07-16 | 2014-07-16 | Transmissometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104089878A true CN104089878A (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410339390.5A Pending CN104089878A (en) | 2014-07-16 | 2014-07-16 | Transmissometer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2271723Y (en) * | 1995-12-24 | 1997-12-31 | 黄喜平 | Writing Projector |
| CN2580477Y (en) * | 2002-11-22 | 2003-10-15 | 鸿富锦精密工业（深圳）有限公司 | Polarized light source system |
| CN2879175Y (en) * | 2005-08-02 | 2007-03-14 | 德菲电气（北京）有限公司 | Multi-component ultraviolet on-line gas analyzing inetrument |
| CN101470336A (en) * | 2007-12-25 | 2009-07-01 | 上海晨兴电子科技有限公司 | Projection display apparatus and its projection method |
| CN101647733A (en) * | 2009-09-09 | 2010-02-17 | 张轩 | Scald apparatus using arc lamp as light source |
| CN101672767A (en) * | 2009-09-01 | 2010-03-17 | 深圳市蓝韵实业有限公司 | Grating spectrophotometer |
| CN201652196U (en) * | 2009-08-21 | 2010-11-24 | 张昌锐 | Combined multiple-mirror light condensing device |
-
2014
- 2014-07-16 CN CN201410339390.5A patent/CN104089878A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2271723Y (en) * | 1995-12-24 | 1997-12-31 | 黄喜平 | Writing Projector |
| CN2580477Y (en) * | 2002-11-22 | 2003-10-15 | 鸿富锦精密工业（深圳）有限公司 | Polarized light source system |
| CN2879175Y (en) * | 2005-08-02 | 2007-03-14 | 德菲电气（北京）有限公司 | Multi-component ultraviolet on-line gas analyzing inetrument |
| CN101470336A (en) * | 2007-12-25 | 2009-07-01 | 上海晨兴电子科技有限公司 | Projection display apparatus and its projection method |
| CN201652196U (en) * | 2009-08-21 | 2010-11-24 | 张昌锐 | Combined multiple-mirror light condensing device |
| CN101672767A (en) * | 2009-09-01 | 2010-03-17 | 深圳市蓝韵实业有限公司 | Grating spectrophotometer |
| CN101647733A (en) * | 2009-09-09 | 2010-02-17 | 张轩 | Scald apparatus using arc lamp as light source |
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