CN104359866A - Retro-reflection measuring device - Google Patents
Retro-reflection measuring device Download PDFInfo
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- CN104359866A CN104359866A CN201410679212.7A CN201410679212A CN104359866A CN 104359866 A CN104359866 A CN 104359866A CN 201410679212 A CN201410679212 A CN 201410679212A CN 104359866 A CN104359866 A CN 104359866A
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Abstract
The invention discloses a retro-reflection measuring device which adopts one or more sampling devices with diaphragms and reflectors with holes as well as one or more measuring devices corresponding to the sampling devices in quantity. Measurement of a plurality of retro-reflection characteristics under different observation angles can be achieved by one-time measurement, and the device can be suitable for accurate adjustment of various observation angles and the size of a measuring zone by flexibly selecting the sizes of the diaphragms and the reflectors with holes. No other intermediate device is needed and the optical signal of the zone is free of defects, so that the measuring accuracy is improved. Meanwhile, various color filters, a monitoring device and the like can be further flexibly arranged, so that the diversified measuring function is achieved. The device has the characteristics of fastness in measurement, high accuracy, small size, wide application range, powerful function, integral design and the like and can be widely applied to various occasions such as laboratories, industrial production lines, field fast measurement and the like.
Description
[technical field]
The invention belongs to optical radiation measurement field, be specifically related to a kind of retro-reflection characteristic measuring device.
[background technology]
Emitting retroreflective material is mainly used in the traffic safety alarm mark fields such as road traffic mark, graticule, various sight line inducing installations, has vital role to the operation that ensures traffic safety, and retro-reflection characteristic evaluates such material the most effectively and the most direct means.The measurement of retro-reflection characteristic requires that illumination angle and view angle meet specific condition, because angle is very little, in actual measurement, want precise control of angular degree often to need very large measuring distance, and need to carry out in very large darkroom, significantly limit its application in actual measurement of engineering, this also proposes very high requirement to the accuracy of instrument test result and fiduciary level.In addition, produce in line and on-site rapid measurement in industry, except requiring to realize except larger measuring distance within less space as far as possible, the general endless belt light signal meeting condition of lighting and observation that adopts is to realize the measuring condition of retro-reflection characteristic.
Notification number be US 7961328 B2 patent discloses a kind of multi-angle retro-reflection measurement mechanism, it is matched with endless belt minute surface by ring band electro-optical device, can realize the measurement of viewing angle corresponding to two different measuring endless belt simultaneously.In this technical scheme, need multiple bracing or strutting arrangement to support endless belt light transmission device, the introducing of multiple bracing or strutting arrangement can cause the imperfect of endless belt light signal, affects accuracy of measurement; In addition also there is unstable risk in the fixing of bracing or strutting arrangement, thus reduce reliability and the accuracy of device to test; And ring band electro-optical device limits in light path and needs to adopt beam splitter or small-sized catoptron, beam splitter can produce larger optical energy loss, and refracting process also can introduce measuring error, its processing of small-sized catoptron and fixing all more difficult, also can introduce and produce comparatively big error.
[summary of the invention]
For the deficiencies in the prior art, the present invention aims to provide a kind of portable retro-reflection measurement mechanism quick, accurate, applied widely, only need one-shot measurement, under the different viewing angle of group more than can simultaneously realizing, quick, the Measurement accuracy of retro-reflection characteristic, have the features such as volume is little, light path is simple, accuracy of measurement is high, speed is fast, easy to operate, cost is low.
The present invention is achieved through the following technical solutions: a kind of retro-reflection measurement mechanism, it is characterized in that, comprise light source, sampling apparatus and corresponding with sampling apparatus quantity one or above measurement mechanism that the different range of view angles of a group or above realization measures endless belt.Described sampling apparatus is made up of catoptron with holes and diaphragm; The light that light source sends incides on sample with certain illumination angle, the retro-reflection light of sample via formed after the sampling apparatus of catoptron with holes and diaphragm composition meet view angle condition endless belt light signal, received by corresponding measurement mechanism.
The measurement of retro-reflection characteristic comprises illumination path and observation light path two light paths, light source sends irradiation light and is illumination path according to the light path that certain illumination angle incides on sample, and the light path that the measured device of the retro-reflection light that sample sends receives is observation light path.In the present invention, the light that light source sends is irradiated on sample, the sampling apparatus of diaphragm and catoptron with holes composition is arranged in the light path before sample and measurement mechanism, and the retro-reflection light of sample is received by the measurement mechanism of correspondence through sampling apparatus; Often organize sampling apparatus to be formed by the diaphragm of certain size and arrangement of mirrors with holes, often the measurement endless belt that viewing angle is corresponding determined by group diaphragm and corresponding one of catoptron with holes, the endless belt light signal of what thus measurement mechanism received is sample retro-reflection light, and then the retro-reflection completed under this view angle is measured.By that analogy, sampling apparatus of the present invention can realize the measurement endless belt of many group different sizes, and the retro-reflection light of sample passes through the measurement endless belt under different viewing angle successively, and the retro-reflection that once sampling can complete multiple different viewing angle is measured.Compared to existing retro reflecting device, the present invention proposes a kind of retro-reflection measurement scheme of novelty, it introduces the sampling apparatus be made up of diaphragm and catoptron with holes, light path design is simple, ingenious, without the need to bracing or strutting arrangement, can obtain complete retro-reflection endless belt light signal, accuracy of measurement is high, good stability; Light path extendability is strong, according to testing requirement, can arrange multiple sampling apparatuses of satisfied different viewing angle, and once sampling can complete the retro-reflection feature measurement of the endless belt light signal under multiple different viewing angle; In addition light path is set by ingenious, makes the illumination path from light source to sample, from sample to sampling apparatus and the optical path of measurement mechanism do not interfere with each other, only need start light source can realize measure object; In addition, sampling apparatus manufacturing process simply and easily install, has the features such as cost is low, parasitic light is low, easy to operate.
The present invention also limits by following technical scheme and perfect further:
In the present invention, catoptron with holes in described sampling apparatus is for reflecting the light being greater than and measuring endless belt internal diameter, diaphragm is for ending the light being greater than and measuring endless belt external diameter, catoptron with holes and diaphragm combination are formed measures endless belt, can be determined the measurement endless belt of a range of view angles by a sampling apparatus.Such as, to obtain the measurement endless belt of (α ± Δ α) under α viewing angle, the aperture size of the catoptron with holes in sampling apparatus is (α-Δ α) to the subtended angle at sample center, and the beam angle of its reflection is greater than the light of (α-Δ α); And in sampling apparatus diaphragm aperture size corresponding to subtended angle be (α+Δ α), the light beam that only subtended angle is less than (α+Δ α) can pass through diaphragm, then after the combination of catoptron with holes and diaphragm, what measurement mechanism received is the endless belt light signal of beam angle scope in (α-Δ α) ~ (α+Δ α).
As a kind of technical scheme, described catoptron with holes and the center of diaphragm are arranged on optical axis, precisely to realize measurement endless belt corresponding to different view angle.Such as, if optical axis is all departed from the center of catoptron with holes and diaphragm, the aperture size of catoptron with holes is β to the subtended angle at sample center, is positioned at being respectively (β+Δ β) and (β-Δ β) of optical axis both sides subtended angle, is positioned at optical axis top; The subtended angle of aperture of the diaphragm center to sample center is of a size of γ (γ < β), is positioned at being respectively (γ+Δ γ) and (γ-Δ γ) of optical axis both sides subtended angle, is positioned at optical axis bottom; Then catoptron with holes and diaphragm are in conjunction with formation irregular light-emitting zone, cannot form measurement endless belt, thus cannot meet measurement requirement.
As a kind of technical scheme, comprise a sampling apparatus, the catoptron with holes of described sampling apparatus and diaphragm be arranged on measurement mechanism before light path on.Through the restriction of sampling apparatus to light beam, be met the light beam of range of view angles, received by the measurement mechanism of follow-up correspondence and measure, completing the feature measurement to a viewing angle retro-reflection.
As a kind of technical scheme, comprise two and plural sampling apparatus, the catoptron with holes of a described rear sampling apparatus is arranged in the light path before the diaphragm of last sampling apparatus along observation light path.Wherein with realize θ and
the sampling apparatus of two view angles is example, light through sample retro-reflection is measured on the catoptron with holes in endless belt sampling apparatus to θ viewing angle, the beam reflection that beam angle is greater than by catoptron with holes (θ-Δ θ) measures the catoptron place with holes of endless belt sampling apparatus to φ viewing angle, and wherein beam angle is less than
light beam through diaphragm, the θ viewing angle diaphragm cutoff beam angle measured in the sampling apparatus of endless belt is greater than the light beam of (θ+Δ θ), namely θ viewing angle measure light beam in endless belt by and received by the measurement mechanism of follow-up correspondence and measure; Beam angle is greater than
light beam be reflected onto
viewing angle measures the diaphragm in the sampling apparatus of endless belt,
the diaphragm cutoff beam angle that viewing angle is measured in the sampling apparatus of endless belt is greater than
light beam, namely
the viewing angle light beam measured in endless belt passes through and is received by the measurement mechanism of follow-up correspondence and measure.So far realize the measurement to multiple angle retro-reflection simultaneously.
As a kind of technical scheme, described different measuring endless belt sets gradually from small to large along observation light path.With θ and
measurement endless belt corresponding to two different viewing angles is example, obtains the sampling apparatus that θ viewing angle measures endless belt and is arranged on along observation light path
viewing angle is measured in the light path before the sampling apparatus of endless belt.θ and last sampling apparatus obtain the measurement endless belt of θ range of view angles,
namely after, a sampling apparatus obtains
the measurement endless belt of range of view angles, not only can realize measuring the retro-reflection of multiple viewing angle, also can significantly improve utilization factor and the testing efficiency of light path.
As preferably, the view angle that above-mentioned measurement endless belt is corresponding is 0.2 ° or 0.33 ° or 0.5 °, to meet actual measurement demand international and domestic at present.It is pointed out that the size by choosing catoptron with holes and diaphragm flexibly, the present invention can realize the measurement endless belt under multiple view angle simultaneously, meets different testing requirements, extensibility and universality good.
As a kind of technical scheme, comprise one or above color filter, described color filter arranges in observation light path and/or illumination path, the retro-reflection light of sample is after filtration after color chips, measured device receives, and namely measurement mechanism receives the endless belt light signal after corresponding color filter effect, different according to the kind of selected color filter, and match with corresponding measurement mechanism, the measurement of the different reflection characteristic of sample can be realized.Such as, transmitance simulation CIE luminosity function V (λ) of described color filter, matches with measurement mechanism, can realize the measurement of various light quantity.In addition, in the above-mentioned position arranging color filter, also color filter wheel can be comprised, described color filter wheel is arranged one or above color filter, be switched in light path by color filter wheel by different color filters, measurement mechanism receives the endless belt light signal through corresponding color filter, realize under same view angle, the measurement of different optical characteristic, color filter here can be arranged in observation light path, also can be arranged in illumination path.
One or more sampling apparatus can be comprised in retro reflecting device of the present invention.When comprising a sampling apparatus, before color filter can be arranged on measurement mechanism, observation light path any position, all can act on this sampling apparatus realize endless belt light signal.When comprising multiple sampling apparatus, above-mentioned observation light path is that one or more is measured the independent observation light path of endless belt or jointly observes light path, observation light path comprises two or more and measures the common observation light path of endless belt and each measures independent observation light path corresponding to endless belt, described common observation light path is before the catoptron with holes of a rear sampling apparatus and comprises the transmission light path of different measuring endless belt light signal, as the light path A in Fig. 3, B and C, wherein A and B light path comprises three measurement endless belt light signals, and light path C comprises the light signal that latter two measures endless belt; The independent observation light path of described last sampling apparatus is after the catoptron with holes of a rear sampling apparatus and is positioned at the light path at the light place by this catoptron aperture with holes.
Described color filter is arranged in common observation light path or independent observation light path.Also can be arranged in common observation light path specific to the color filter that light path D, E and F of Fig. 4 are corresponding.Color filter is arranged in common observation light path, realize the measurement of retro-reflection light same optical properties under each different view angle, such as, in A or B light path, the color filter of simulation CIE luminosity function V (λ) is set, then can realizes the measurement that three are measured endless belt light signal light quantity; If above-mentioned color filter is arranged in light path C, then can measure the measurement of endless belt light signal light quantity to latter two.Color filter also can be separately positioned in independent observation light path, the light-filtering characteristic of each color filter can be identical or different, but the color filter that last measurement mechanism is corresponding must be arranged in the light path by the light place of catoptron aperture with holes corresponding to a rear measurement mechanism, the retro-reflection light that sample sends, through after the catoptron with holes of a measurement mechanism be divided into two parts, a part is the light by aperture, and another part is the light reflected by catoptron with holes.Color filter is just arranged through in the light path at light place of aperture, the diaphragm of last measurement mechanism, color filter and measurement mechanism is provided with in this part light path, wherein diaphragm and arranging of color filter sequentially can be arranged arbitrarily, before both all only must be arranged on measurement mechanism, the measured device of the measurement endless belt of color chips and diaphragm receives after filtration, and namely measurement mechanism receives the endless belt light signal after color filter effect; The light that another part is reflected by catoptron with holes, again through a diaphragm, color filter later, forms that corresponding endless belt light signal is received by a rear measurement mechanism, detection.In addition, in the above-mentioned corresponding position arranging color filter, color filter wheel with placing multiple color filter also can be set, thus can realize under same view angle, the measurement of different retro-reflection characteristic, such as, measurement mechanism is black-white CCD, three color filters can be set on color filter wheel, the combination spectrum of these three color filters and black-white CCD responds as CIE tristimulus values curve x (λ), y (λ) and z (λ), color filter wheel, under the drive of drive unit, can realize the measurement of retro-reflection light tristimulus values; If color filter is the spectral luminous efficiency function under the different vision (photopic vision, noctovision, mesopic vision) of simulation CIE, then can obtain the luminosity value of retro-reflection light under different vision.
As a kind of technical scheme, described light source comprises the different monochromatic LEDs of or above program-controlled driving, described one or above monochromatic LED independence or illuminated in combination, directly or indirect irradiation on sample.Light source in the present invention has multiple implementation, it can be the LED array comprising multiple different monochromatic LEDs, under the control of stored program controlled, each different monochromatic LED on LED array is independent or combine the light sent, shine directly on sample, to realize the measurement of the retro-reflection characteristic of sample under different radiation source, also integrating sphere can be comprised, one or above monochromatic LED are independent or combine the light that sends after integrating sphere mixed light, be irradiated on sample, multiple different monochromatic LED also can match with integrating sphere, because the beam angle of LED luminescence is narrower, the homogeneity of the light intensity of light source outgoing cannot ensure, particularly for multiple monochromatic LED mixed light, the effect of direct mixed light is poor, each different monochromatic LED is arranged on integrating sphere, the light that its independence or combination send is after integrating sphere mixed light, be irradiated to again on sample, the mode of this indirect irradiation can guarantee that the irradiation light that sample receives is even, avoid the measuring error of the uneven introducing due to irradiation light.In addition, other light source adopted in other retro-reflection measurement mechanism also can be used in the present invention.Here monochromatic LED type of drive also can be selected flexibly, preferably adopts the mode of pulsed drive, by phase lock amplifying technology, effectively removes parasitic light, improves measuring accuracy, and follow-up signal process is more simple simultaneously, improves testing efficiency.
In addition, the devices such as collimator apparatus, diaphragm and feature color filter can also be set in illumination path.Such as, comprise collimator apparatus, described collimator apparatus be arranged on light source after light path on; Or comprise diaphragm, described diaphragm be arranged on collimator apparatus after light path on, coordinate collimator apparatus for generation of the illuminating bundle met the demands; Also comprise feature color filter, described feature color filter be arranged on diaphragm after light path on, for revising the spectrum of light source.
As a kind of technical scheme, described measurement mechanism is photometric detector or spectral radiance counter device, and different measurement mechanisms can meet different testing requirements, realizes the Quick Measurement to sample luminosity, colourity and spectrum.
As a kind of technical scheme, comprise one and above catoptron, described catoptron is arranged in illumination path and/or observation light path, reducing operating distance, reducing instrument volume when ensureing measuring distance.It is pointed out that in light path and multiple catoptron can be adopted to reduce operating distance, be beneficial to instrument miniaturization.But reducing of pursuit operating distance blindly and too much employing catoptron can cause because of multiple reflections, original optical signal being lost, and then the signal testing affecting measurement mechanism in follow-up retro-reflection process receives, produce significant error, thus suitably should select the quantity of catoptron, such as, can two catoptrons be preferably set in the optical path.
As a kind of technical scheme, comprise the monitoring device of monitoring light source fluctuation, described monitoring device receives the light sent from light source.The position of monitoring device can be arranged flexibly, as can be arranged on the side of light source or be arranged in the side light path of illumination path.In the present invention, monitoring device can be selected flexibly, meet different testing requirements, monitoring device can be spectral radiometer or photodetector or brightness measuring device for camera, monitoring device is preferably spectral radiometer, measurement mechanism is consistent with the metrical information of monitoring device, and the measurement result that can make full use of both obtains comprehensively luminosity, colourity and the spectrum value such as the reflectivity of sample, spectral reflectivity and the coefficient of luminous intensity.
As preferably, comprise cabinet, light source above, sampling apparatus, color filter, color filter wheel, measurement mechanism, monitoring device are all arranged in cabinet, and integration degree is high, design integration, easy to operate.In addition, cabinet also can comprise human-computer interaction device, and described human-computer interaction device comprises touch screen displays, touch screen control module and microprocessor, in order to Intelligent treatment and test data, and display test mode and test result in real time.
In sum, the present invention adopts one or comprise the sampling apparatus of diaphragm and catoptron with holes above, and corresponding with sampling apparatus quantity one or above measurement mechanism, one-shot measurement can achieve the measurement of retro-reflection characteristic under multiple different view angle simultaneously, by selecting the size of diaphragm and catoptron with holes flexibly, be applicable to various view angle, and measure the accurately adjustable, applied widely of endless belt size; Without the need to other middle devices, the endless belt light signal of realization, without disappearance, improves accuracy of measurement further; Simultaneously also can the various color filter of flexible configuration, monitoring device etc., realize diversified measurement function, have that measuring speed is fast, accuracy is high, volume is little, the feature such as applied widely, powerful and design integration.Can be widely used in laboratory, the various occasion such as line and on-site rapid measurement is produced in industry.
[accompanying drawing explanation]
Accompanying drawing 1 is the schematic diagram of embodiment 1;
Accompanying drawing 2 is schematic diagram of embodiment 2;
Accompanying drawing 3 is schematic diagram of embodiment 3;
Accompanying drawing 4 is schematic diagram embodiment 3 color filter wheel being arranged color filter;
Accompanying drawing 5 is light source schematic diagram of embodiment 4.
1-light source; 2-sampling apparatus; 21-catoptron with holes; 22-diaphragm; 3-measurement mechanism; 4-sample; 5-integrating sphere; 6-color filter; 7-color filter wheel; 8-monitoring device; 9-catoptron; 10-cabinet; 11-monochromatic LED; 12-drive unit.
[embodiment]
Embodiment 1
As shown in Figure 1, a kind of retro-reflection measurement mechanism measuring single viewing angle is disclosed in the present embodiment, comprise light source 1, sampling apparatus 2, measurement mechanism 3 and sample 4, sampling apparatus 2 is made up of a catoptron 21 with holes and a light path 22, the center of catoptron 21 with holes and diaphragm 22 is all positioned on optical axis, and light source 1, catoptron with holes 2, sample 4, diaphragm 22 and measurement mechanism 3 set gradually in the optical path.
The present embodiment realizes the retro-reflection feature measurement that corresponding 0.2 ° ± 0.05 ° of 0.2 ° of view angle measures endless belt, the light beam that light source 1 sends is directly incident on the surface of sample 4 through catoptron 21 with holes, via the light reflection of sample 4 retro-reflection to catoptron 21 with holes, wherein beam angle is greater than the light of 0.15 ° along observation light path arrival diaphragm 22, the light of beam angle in 0.25 ° is by diaphragm 22, thus form the endless belt light signal of 0.2 ° ± 0.05 °, be placed on the measurement mechanism 3 after diaphragm 22 to receive, the retro-reflection completed under 0.2 ° of viewing angle is measured.
The present embodiment light path is simple, ingenious, without the need to arranging bracing or strutting arrangement, completely can realize the measurement of 0.2 ° ± 0.05 ° of endless belt light signal, accuracy of measurement is high, and system architecture is simple, compact, easy to operate, test speed is fast, is applicable to industry and produces line and on-site rapid measurement.
Embodiment 2
As shown in Figure 2, the present embodiment comprises light source 1, sampling apparatus 2, measurement mechanism 3, monitoring device 8, catoptron 9, cabinet 10, catoptron 9 is arranged in the light path between light source 1 and sample 4, and light source 1, sampling apparatus 2, proving installation 3, monitoring device 8, catoptron 9 are all arranged in cabinet 10.As different from Example 1, illumination path in the present embodiment non-immediate arrive sample 4 surface, and twice reflection being through two catoptrons 91,92 arrives sample 4 surface, achieves the requirement of instrument miniaturization; In addition by arranging three groups of sampling apparatuses 2 (211 and 221,212 and 222,213 and 223), realize measuring the endless belt light signal under three viewing angles simultaneously.
The view angle that three groups of sampling apparatuses in the present embodiment are corresponding is respectively followed successively by 0.2 °, 0.33 °, 0.5 °, and corresponding endless belt light signal is respectively 0.2 ° ± 0.05 °, 0.33 ° ± 0.05 °, 0.5 ° ± 0.05 °; It is in observation light path, arrange from small to large successively, catoptron with holes 21 along a rear sampling apparatus 2 of observation light path is arranged in the light path before the diaphragm 22 of last sampling apparatus 2, namely before the catoptron with holes 212 of second group of sampling apparatus is arranged on the diaphragm 221 of first group of sampling apparatus, before the catoptron with holes 213 of the 3rd group of sampling apparatus is arranged on the diaphragm 222 of second group of sampling apparatus.
During measurement, the light that light source 1 sends is through catoptron 211 with holes, along illumination path through catoptron 91, the surface of sample 4 is irradiated to after catoptron 92 liang of secondary reflections, the retro-reflection light of sample 4 is back to catoptron 211 with holes along illumination path, the light beam that catoptron 211 reflected light beam angle with holes is greater than 0.15 °, this segment beam reflexes to next catoptron 212 place with holes along observation light path, part light is the catoptron with holes 212 of 0.28 ° successively through aperture size, and aperture size is the diaphragm 221 of 0.25 °, the light beam that diaphragm 221 cutoff beam angle is greater than 0.25 °, thus measurement mechanism 31 receives the endless belt light signal of 0.15 ° ~ 0.25 °, the light beam that another part beam angle is greater than 0.28 ° is reflected by catoptron 222 with holes, catoptron 213 place with holes is reflexed to along observation light path, part light is successively through aperture size to be the catoptron with holes 213 of 0.45 ° and aperture size the be diaphragm 222 of 0.38 °, the light beam that diaphragm 222 cutoff beam angle is greater than 0.38 °, measurement mechanism 32 receives the endless belt light signal of 0.28 ° ~ 0.38 °, the light beam that another part beam angle is greater than 0.45 ° is reflexed to diaphragm 223 place by catoptron 213 with holes, and diaphragm 223 is greater than the light beam of 0.55 ° for cutoff beam angle, and measurement mechanism 33 receives the endless belt light signal of 0.45 ° ~ 0.55 °.By one-shot measurement, the endless belt light signal that simultaneously can be met three viewing angles is measured, and significantly can reduce test consuming time, improves testing efficiency, has that measuring speed is fast, accuracy is high and the feature such as easy to operate.
The present embodiment also comprises the monitoring device 8 being arranged on light source 1 side, in order to receive the light sent from light source 1.Measurement mechanism 3 in the present embodiment and monitoring device 8 are spectral radiometer, both metrical informations are consistent, and the measurement result that can make full use of both obtains comprehensively luminosity, colourity and the spectrum value such as the reflectivity of sample, spectral reflectivity and the coefficient of luminous intensity.
Embodiment 3
As shown in Figure 3, as different from Example 2, the present embodiment comprises color filter 6, in light path after color filter 6 is arranged on the catoptron with holes 212 of second group of sampling apparatus, before the catoptron with holes 213 of the 3rd group of sampling apparatus, be namely arranged in the common observation light path C of second group of sampling apparatus and the 3rd group of sampling apparatus; Measurement mechanism 32 and measurement mechanism 33 are detector, color filter 6 is CIE human eye spectral luminous efficiency function V (λ), because this color filter 6 is arranged in common observation light path C, the light that what measurement mechanism 32 and measurement mechanism 33 received is all after the effect of this color filter 6, namely measurement mechanism 32 and measurement mechanism 33 obtain the shading value of different view angle.
The present embodiment also comprises color filter wheel 7, and color filter wheel 7 is arranged in the light path before the diaphragm 221 of first group of sampling apparatus 2 and measurement mechanism 31, is namely arranged in the independent observation light path D of first group of sampling apparatus 2.As shown in Figure 4, color filter 7 is arranged 4 color filters 6, measurement mechanism 31 is black-white CCD, wherein the combination spectrum of three color filters and black-white CCD responds and is respectively CIE tristimulus curve x (λ), y (λ) and z (λ), color filter wheel 7, under the drive of drive unit, can realize the measurement of retro-reflection light tristimulus values; Another one color filter should be CIE human eye spectral luminous efficiency function V (λ) mutually with the combination spectrum of black-white CCD, can obtain the luminosity value of retro-reflection light under photopic vision.
Embodiment 4
All different from above-described embodiment, the present embodiment comprises integrating sphere 5, integrating sphere 5 ball wall arranges 4 monochromatic LEDs 11, by each monochromatic LED 11 all be connected program control driving device 12, program control driving device 12 is controlled each monochromatic LED 11 and is all driven by the mode of pulsed drive and illuminated in combination control, one or above monochromatic LED are independent or combine the light that sends after integrating sphere 5 mixed light, be irradiated on sample 4, guarantee that the irradiation light that sample 4 receives is even, avoid the measuring error of the uneven introducing due to irradiation light.
Claims (15)
1. a retro-reflection measurement mechanism, it is characterized in that, comprise light source (1), one group or above sampling apparatus (2) and corresponding with sampling apparatus (2) quantity or the above measurement mechanism (3) realizing different measuring endless belt, described sampling apparatus (2) is made up of catoptron with holes (21) and diaphragm (22); The light that light source (1) sends incides on sample (4) with certain illumination angle, the retro-reflection light of sample (4) formed after catoptron with holes (21) and diaphragm (22) meet view angle condition endless belt light signal, received by corresponding measurement mechanism (3).
2. retro-reflection measurement mechanism as claimed in claim 1, it is characterized in that, described catoptron with holes (21) reflection is greater than the light measuring endless belt internal diameter, described diaphragm (22) cut-off is greater than the light measuring endless belt external diameter, and described catoptron with holes (21) and diaphragm (22) combination are formed measures endless belt.
3. retro-reflection measurement mechanism as claimed in claim 1, is characterized in that, being centrally located on optical axis of described catoptron with holes (21) and diaphragm (22).
4. retro-reflection measurement mechanism as claimed in claim 1, it is characterized in that, comprise two or more sampling apparatus (2), the catoptron with holes (21) along a rear sampling apparatus (2) of observation light path is arranged in the light path before the diaphragm (22) of last sampling apparatus (2).
5. retro-reflection measurement mechanism as claimed in claim 1, is characterized in that, in observation light path, described different measuring endless belt sets gradually from small to large.
6. retro-reflection measurement mechanism as claimed in claim 5, it is characterized in that, the view angle that described measurement endless belt is corresponding is 0.2o or 0.33o or 0.5o.
7. retro-reflection measurement mechanism as claimed in claim 1, it is characterized in that, described light source (1) comprises the different monochromatic LEDs (11) of or above program-controlled driving, described one or above monochromatic LED (11) independence or illuminated in combination, directly or indirect irradiation on sample (4).
8. retro-reflection measurement mechanism as claimed in claim 7, is characterized in that, described monochromatic LED (11) adopts pulse mode to drive.
9. retro-reflection measurement mechanism as claimed in claim 7, it is characterized in that, comprise integrating sphere (5), one or above monochromatic LED (11) are independent or combine the light that sends after integrating sphere (5) mixed light, are irradiated on sample (4).
10. retro-reflection measurement mechanism as claimed in claim 1, it is characterized in that, comprise one or above color filter (6), described color filter (6) is arranged in observation light path and/or illumination path, and measurement mechanism (3) receives the endless belt light signal after corresponding color filter (6) effect.
11. retro-reflection measurement mechanisms as claimed in claim 10, it is characterized in that, comprise color filter wheel (7), described color filter wheel (7) is arranged one or above color filter (6), be switched in light path by color filter wheel (7) by different color filters (6), measurement mechanism (3) receives the endless belt light signal through corresponding color filter (6).
12. retro-reflection measurement mechanisms as claimed in claim 10, it is characterized in that, described observation light path comprises two or more and measures the common observation light path of endless belt and each measures independent observation light path corresponding to endless belt, and described color filter (6) is arranged in common observation light path or independent observation light path.
13. retro-reflection measurement mechanisms as claimed in claim 1, it is characterized in that, comprise monitoring the monitoring device (8) that light source (1) fluctuates, described monitoring device (8) receives the light sent from light source (1).
14. retro-reflection measurement mechanisms as claimed in claim 1, is characterized in that, comprise one and above catoptron (9), and described catoptron (9) is arranged in illumination path and/or observation light path.
15. retro-reflection measurement mechanisms as claimed in claim 1, is characterized in that, described measurement mechanism (3) is photometric detector or spectral radiometer.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410679212.7A CN104359866B (en) | 2014-11-24 | 2014-11-24 | A kind of retro-reflection measurement apparatus |
| PCT/CN2015/076082 WO2016082416A1 (en) | 2014-11-24 | 2015-04-08 | Retro-reflection measuring device |
| US15/529,464 US10393655B2 (en) | 2014-11-24 | 2015-04-08 | Apparatus for retro-reflection measurement using a holed mirror and circular aperture for annular band detection |
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| CN201410679212.7A CN104359866B (en) | 2014-11-24 | 2014-11-24 | A kind of retro-reflection measurement apparatus |
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| CN104359866A true CN104359866A (en) | 2015-02-18 |
| CN104359866B CN104359866B (en) | 2017-11-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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