CN105445195A - Sample measuring cell - Google Patents
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- CN105445195A CN105445195A CN201410781960.6A CN201410781960A CN105445195A CN 105445195 A CN105445195 A CN 105445195A CN 201410781960 A CN201410781960 A CN 201410781960A CN 105445195 A CN105445195 A CN 105445195A
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Abstract
The invention discloses a sample measuring cell. The sample measuring cell comprises a reflection cavity and at least a reflection structure, wherein the reflection cavity is used for containing samples to be measured; the reflection structures are arranged on the boundary of the reflection cavity and comprise at least a contact surface and two reflecting surfaces; the contact surfaces are used for coming into contact with the samples; the reflecting surfaces are far away from the samples; and the reflecting surfaces are fully reflecting surfaces or are not fully reflecting surfaces. The sample measuring cell has the beneficial effects that the sample contact surfaces have chemical inertness toward the samples, and meanwhile, the reflecting surfaces are far away from the samples to be measured, so that the impurities in the samples to be measured and in samples cannot damage the reflecting surfaces playing a reflecting role; therefore the sample measuring cell has the advantages of strong adaptive capacity to environment and long optical path.
Description
Technical field
The present invention relates to a kind of sample measuring cell, particularly relate to a kind of sample measuring cell utilizing the physico-chemical property of optical means to sample to measure.
Background technology
At present, all need to utilize absorption spectroscopy to detect the micro-example of ppm and ppb concentration level in the application in a lot of field, in order to improve the detection sensitivity of absorption spectroscopy techniques to low concentration sample, increase light beam is a kind of effective method through the light path of sample.Obviously, merely by optical light source and detector position away from, make light beam pass through a very straight long transmission-type sample measuring cell, can make that device is heavy, collimation is complicated, temperature stability and poor seismic behavior.Usual employing " folds " light path, even if light beam multiple reflections between catoptron realizes the effective optical path lengthening in a less area of space.Such as, more commonly White type sample measuring cell and Herriott type sample measuring cell, these two kinds of sample measuring cells all adopt sphere concave mirror in less chamber volume, realize the multiple reflections of light path.Equally also there is the mode utilizing plane mirror to realize, such as, describe in US Patent No. 3524066 and two plane mirrors are installed to realize the multiple reflections of light path at the two ends of cylindrical cavity.
But, in actual use, when test environment severe (high dust, corrosivity, high moisture content, high temperature, vibration etc.), based on the sample measuring cell of catoptron, because high reverse--bias rete is plated in front surface (i.e. eyeglass plating external reflection film), now, the reflecting surface of catoptron overlaps with the surface of contact contacting sample, is namely all a face.Actual when using this rete directly contact with the sample in sample measuring cell, rete easily destroy by the impurity in sample, sample.
Usually, high reverse--bias rete is metallic reflective coating or dielectric reflection film.If use metallic reflective coating, because the metal film hardness of individual layer is lower, be very easily scratched, therefore, metal film of being everlasting add protective film coating, and metallic reflective coating inherently needs to form through repeatedly plating to establish, the metallic reflective coating obtained generally comprises stratified film.Similarly, when using dielectric reflection film, dielectric reflection film generally forms by repeatedly plating to establish, and therefore, the dielectric reflection film obtained also comprises stratified film.No matter be metallic reflective coating or dielectric reflection film, because the compactness of the adhesiveness between each rete, adhesiveness between rete and substrate material and rete is limited, when highly reflecting films being placed in the rugged surroundings such as high temperature, high humidity, high dust, corrosivity, between each rete that gas in environment, steam and impurity easily enter into high reverse--bias rete and the junction of high reverse--bias rete and substrate of glass, makes high reverse--bias rete easily be destroyed, in addition, in the preparation process of high reverse--bias rete, generally can introduce particle foreign matter, the particle foreign matter introduced can cause the defect of high reverse--bias rete, when there being the catoptron of rete defect to be placed in rugged surroundings, destruction can be aggravated, this not only makes the reflectance reduction of high reverse--bias rete, loss luminous energy, and the rete that destructive process comes off also may stop light path, the collection efficiency of further reduction luminous energy, even can make glass deformation fracture under the effect of the stress of high reverse--bias rete, thus cause the environmental suitability of the sample measuring cell based on coating technique catoptron poor, different measurement environment cannot be adapted to, cannot normally use in rugged surroundings.
Summary of the invention
The object of the present invention is to provide a kind of sample measuring cell.
Sample measuring cell of the present invention measuring method used is optical means, includes but not limited to: the analytical approachs such as absorption spectrum, Raman spectrum, scattering spectra, fluorescence.
One of for achieving the above object, an embodiment of the present invention provides sample measuring cell, and described sample measuring cell comprises reflection cavity and at least one reflection configuration, and reflection cavity is used for accommodating testing sample; At least one reflection configuration described is arranged at the border of described reflection cavity; Wherein, described reflection configuration comprises two reflectings surface and at least one surface of contact, described surface of contact contacts described testing sample, described reflecting surface is away from described testing sample, described reflecting surface is fully reflecting surface or non-fully reflecting surface, when described reflecting surface is fully reflecting surface, the travel path of the multiple reflections of incident light in described reflection cavity is not in a plane; When described reflecting surface is non-fully reflecting surface, described non-fully reflecting surface is coated with reflectance coating.
Progress one as an embodiment of the present invention improves, and at least one reflection configuration described is two secondary counter emitting prisms be oppositely arranged.
Progress one as an embodiment of the present invention improves, and at least one reflection configuration described is two two mirror catoptrons be oppositely arranged.
Progress one as an embodiment of the present invention improves, described secondary counter emitting prism or described two mirror catoptrons form the first plane and the second plane, described two reflecting surface intersections of described secondary counter emitting prism or described two mirror catoptrons form an axis, described first plane orthogonal is in described axis, described second plane orthogonal is in described first plane and comprise described incident light, and the angle between described incident light and described first plane is greater than 0 ° and is less than 90 °.
Progress one as an embodiment of the present invention improves, described surface of contact and described reflecting surface at least one of them is on-plane surface.
Progress one as an embodiment of the present invention improves, and described on-plane surface is sphere, cylinder, quadric surface, free form surface or aspheric surface.
Progress one as an embodiment of the present invention improves, and the beam waist position of the hot spot of described incident light is positioned at the inside of described reflection cavity.
Progress one as an embodiment of the present invention improves, and has angle between at least one reflection configuration described, and described angle span is 0 ° ~ 360 °.
Progress one as an embodiment of the present invention improves, and described reflecting surface is provided with operator guards, and described operator guards is for the protection of described reflecting surface.
Progress one as an embodiment of the present invention improves, and when described reflecting surface is fully reflecting surface, described reflecting surface is provided with reflectance coating.
Compared with prior art, the invention has the beneficial effects as follows: the reflecting surface of reflection configuration is set to the one side away from testing sample by the present invention, impurity in sample to be measured, sample can not destroy the reflecting surface of reflex, the present invention is while providing long light path, the adaptive capacity to environment of sample measuring cell have also been obtained great lifting, so, the present invention has the advantage of the strong and long light path of adaptive capacity to environment concurrently.
Accompanying drawing explanation
Fig. 1 is the sample measuring cell stereographic map of an embodiment of the present invention;
Fig. 2 is the sample measuring cell front view of an embodiment of the present invention;
Fig. 3 is the total reflection schematic diagram of an embodiment of the present invention;
Fig. 4 is the structural representation of the incident light of an embodiment of the present invention;
Fig. 5 is the light hole structural representation of an embodiment of the present invention;
Fig. 6 is the light hole structural representation of an embodiment of the present invention;
Fig. 7 is the structural representation of the detector of an embodiment of the present invention;
Fig. 8 is the measurement procedure module map of the sample measuring cell of an embodiment of the present invention;
Fig. 9-Figure 16 is the sample measuring cell structural representation of other embodiments of an embodiment of the present invention;
Figure 17 is the sample measuring cell stereographic map of another embodiment of the present invention;
Figure 18 is the structural representation of the incident light of another embodiment of the present invention;
Figure 19-Figure 28 is the sample measuring cell structural representation of other embodiments of another embodiment of the present invention.
Embodiment
Describe the present invention below with reference to embodiment shown in the drawings.But these embodiments do not limit the present invention, the structure that those of ordinary skill in the art makes according to these embodiments, method or conversion functionally are all included in protection scope of the present invention.
As shown in Figures 1 and 2, in an embodiment of the present invention, described sample measuring cell 100 comprises reflection cavity 101 and at least one reflection configuration 102; Described reflection cavity 101 is for accommodating testing sample, and at least one reflection configuration 102 described is arranged at the border of described reflection cavity 101; Wherein, described reflection configuration 102 comprises at least one surface of contact 1021 and two reflectings surface 1022, described surface of contact 1021 contacts described testing sample, described reflecting surface 1022 is away from described testing sample, described reflecting surface 1022 is fully reflecting surface or non-fully reflecting surface, when described reflecting surface 1022 is fully reflecting surface, the travel path of the multiple reflections of incident light L in described reflection cavity 101 is not in a plane; When described reflecting surface 1022 is non-fully reflecting surface, described non-fully reflecting surface is coated with reflectance coating.
Wherein, what directly contact with testing sample is surface of contact 1021, and the reflecting surface 1022 realizing reflex is all away from testing sample, the surface of contact 1021 can not being reflex that namely can be destroyed, and reflecting surface 1022 can not be subject to the impact of the impurity in testing sample, sample, so, the environmental suitability ability of sample measuring cell 100 obtains great lifting.Reflecting surface 1022 is away from testing sample; compared to prior art; its beneficial effect is also: reflecting surface 1022 can arrange operator guards; such as; operator guards is physical construction, can arrange physical construction to protect reflecting surface 1022 to avoid scratch, to stop the impurity such as gas and moisture content to contact with reflecting surface 1022, also can place drying agent near reflecting surface 1022; or be set to high vacuum between reflecting surface and physical construction or be filled with inert gas etc., but not as limit.
In the present embodiment, incident light L arrives reflecting surface 1022 again through surface of contact 1021 and reflects, when incident light L meets certain incident condition, light can between reflecting surface 1022 multiple reflections, the situation of reflection between surface of contact 1021 in conventional art, the distance of the light process of present embodiment is longer, thus realizes longer light path.Therefore, present embodiment has the advantage of the strong and long light path of adaptive capacity to environment.
In the present embodiment, when described reflecting surface 1022 is fully reflecting surface, between described incident light L and the normal of described surface of contact 1021, there is an angle, described angle can make the travel path of described incident light L extend along the juncture area 1025 of two reflectings surface 1022, as shown in Figure 1, described incident light L propagates along juncture area 1025 in the shape of a spiral, namely the travel path of described incident light L is not limited to a plane, but be full of whole space, so, the spread scope of incident light L can be made wider, greatly improve optical path length, add the utilization factor of reflecting surface.
In the present embodiment, the manufactured materials of reflection configuration 102 can be glass, and current known applicable material has: vitreosil, sapphire, calcium fluoride, adamas, yttrium aluminum garnet (YAG), Si
3n
4, ZrO
2, Al
2o
3, HfO
2deng, and other are transparent medium within the scope of frequency of light wave, but not as limit, because such material has chemical inertness, the reflection configuration 102 that such material makes is when being placed in sample measuring cell 100, its surface of contact 1021 can not by the testing sample in sample measuring cell 100, testing sample impurities destroy.Or surface of contact 1021 is attached with has chemically inert material to the impurity in testing sample, testing sample.
In the present embodiment, described reflecting surface 1022 can plate the reflectance coating establishing high reflectance, to strengthen reflecting effect, but not as limit.Reflectance coating can be divided into deielectric-coating or metal film etc. by the unusual of material, but not as limit, compared to prior art, because the reflectance coating in present embodiment is arranged on reflecting surface 1022, the impurity of reflectance coating not in contact measured sample, testing sample, when this reflection configuration 102 is placed in high temperature, high humidity, high dust, corrosive sample measuring cell 100, testing sample in sample measuring cell 100, the impurity in testing sample can not enter the inner or reflectance coating of reflectance coating and reflecting surface 1022 junction, and the reflecting properties of reflectance coating can not sustain damage.Therefore, the reflection configuration 102 of present embodiment is applicable to rugged surroundings (high dust, corrosivity, high moisture content, high temperature etc.); In addition, the incident light L in present embodiment enters described reflection cavity 101 by incident portion, when incident light L meets certain incident condition, light can in reflection cavity 101 multiple reflections, thus realize longer light path.Therefore, present embodiment has the advantage of the strong and long light path of adaptive capacity to environment.
In the present embodiment, described reflection configuration 102 can be two secondary counter emitting prisms 102 be oppositely arranged, and secondary counter emitting prism 102 refers to the prism 102 of light prism 102 internal reflection twice.Prism 102 can be right-angle prism, prism of corner cube, etc. girdle prism etc., but not as limit, the type of prism 102 can be determined according to actual conditions.Described reflecting surface 1022 is fully reflecting surface 1022, and light is totally reflected at fully reflecting surface 1022 place.As shown in Figure 3, total reflection refers to that light incides optically thinner medium (n2 from optically denser medium (n1), n1>n2), when incident angle is greater than critical angle (arcsin(n2/n1)) time, light all returns the phenomenon of optically denser medium, now, the interface of optically denser medium and optically thinner medium is called fully reflecting surface.
In the present embodiment, for two prisms 102, described prism 102 comprises two fully reflecting surfaces 1022, the critical angle that total reflection occurs described fully reflecting surface 1022 is first critical angle, when the angle of described incident light L and described fully reflecting surface 1022 is not less than described first critical angle, described incident light L is multiple total reflection between described fully reflecting surface 1022.Present embodiment utilizes the total reflection effect of prism 102, the reflection process between prism 102 inside and prism 102 can be realized, only need control the incident angle of incident ray L, multiple reflections between prism 102 inside and prism 102 can be realized, thus realize long light path, and the fully reflecting surface 1022 of prism 102 not contact measured amount sample, so, the environmental suitability of sample measuring cell 100 is improved.Suppose that prism 102 is made up of BK7 material, the prism 102 be made up of BK7, along with wavelength variation range is from infrared to vacuum ultraviolet, the transformation range producing the critical angle of total reflection is 42 ° to 40.76 °, such as now the angle of incident light L and fully reflecting surface 1022 is 45 °, then this angle is greater than the critical angle producing total reflection, incident light L multiple total reflection between described multiple fully reflecting surfaces 1022 of described prism 102, concrete, as shown in Figure 1, the optical axis of the surface of contact 1021 of incident ray L and one of them prism 102 is that an angle is incident, angle time this angle can ensure that incident light L reaches on first fully reflecting surface 1022 and between fully reflecting surface 1022 is about 45 °, light outgoing after two fully reflecting surface 1022 places of the inside of prism 102 experience twice total internal reflection, emergent ray incides another one prism 102, outgoing after twice total internal reflection of same experience, light is propagated repeatedly between two prisms 102, last by two one of them outgoing of prism 102.Wherein, because the optical axis of incident ray L and surface of contact 1021 is that an angle is incident, light can realize spiral fashion and propagate between two prisms 102, can improve the utilization factor of fully reflecting surface 1022.
In the present embodiment, as shown in Figure 4, described prism 102 forms the first plane 1027 and the second plane 1028, described two reflecting surface 1022 intersections of described prism 102 form an axis 1025, described axis 1025 is juncture area 1025, described first plane 1027 is perpendicular to described axis 1025, described second plane 1028 is perpendicular to described first plane 1027 and comprise described incident light L, described incident light L and and described first plane 1027 between angle α be greater than 0 ° and be less than 90 °, but not as limit.Incident light L can not be positioned at described second plane 1028, and also can not strictly equal angle α, namely incident light L can have error range, and described error range can be α ± 10 °, but not as limit.
In the present embodiment, described reflecting surface 1022 reflectance coating being provided with high reflectance can be plated, so, even if utilize the total reflection effect of prism 102, also reflecting effect can be strengthened further.Reflectance coating can be divided into deielectric-coating or metal film etc. by the difference of material, and reflectance coating is plated in outside prism 102, makes sample measuring cell 100 be applicable to rugged surroundings.
As shown in Figure 2, the described surface of contact 1021 of described at least two prisms 102 and described multiple reflecting surface 1022 at least one of them is on-plane surface, on-plane surface can be sphere, cylinder, quadric surface or free form surface etc., but not as limit, can determine according to actual conditions.
In the present embodiment, as shown in Figure 5, for two prisms 102, and one of them reflecting surface 1022 of two prisms 102 is sphere, one of them prism 102 can arrange light hole 1023, and incident light L is incident on the described surface of contact 1021 of wherein another prism 102 by described light hole 1023, and described incident light L can be penetrated by described light hole 1023 after reflecting surface 1022 multiple reflections, but not as limit, incident light L also can pass in and out from the side of prism 102.Because reflecting surface 1022 is sphere, through the hot spot generally distribution in closed form that multiple reflections obtains, namely incident light L and emergent light pass in and out from same position, after multiple reflections the hot spot of emergent light can overlap with the hot spot of incident light L, located adjacent one another or be spaced multiple hot spot, the position relationship of the hot spot of the distribution of hot spot, the hot spot of emergent light and incident light L is determined according to actual conditions, when incident light L and emergent light are from same position turnover, the stability of sample measuring cell 100 can be improved, also can realize the miniaturization of sample measuring cell 100.
In the present embodiment, as shown in Figure 5, at least one of them can arrange light hole 1023 at two prisms 102; The quantity of light hole 1023 is not limited to one, as shown in Figure 6, such as, can arrange multiple light hole 1023 on a prism 102; The position of light hole 1023 is not limited at the middle part of prism 102, and such as light hole 1023 can be arranged at the marginal position of prism 102, and namely light hole 1023 can run through the edge of prism 102, and now light hole 1023 is non-closed hole; Prism 102 also can not arrange light hole 1023, and such as incident light L is incident to described reflection cavity 101 from the side of prism 102.
In the present embodiment, due in the communication process of light, it is inner that light will enter prism 102, if design improper, the main optical path that the reflected light on prism 102 surface may be formed incident light L forms interference, cause detection sensitivity low.Experimental studies have found that, cause the essence of this problem to be, be parallel to each other between the surface of contact 1021 of two prisms 102, itself be equivalent to a plane-parallel resonator, if destroy its depth of parallelism, then can reduce the impact of reflected light on main optical path of material surface.Therefore, in present embodiment by the described surface of contact 1021 of described at least two prisms 102 and described multiple reflecting surface 1022 at least one of them is set to on-plane surface, be such as sphere, cylinder, quadric surface or free form surface, aspheric surface etc., but not as limit, so, when incident light L is incident on reflecting surface 1022, angle is had between the light reflected and incident light L, thus the light preventing reflection process from being formed produces interference to the main optical path that incident light L is formed, and reduces the parasitic light in sample measuring cell 100.Learnt by computer simulation experiment, when other influences factor is consistent, nonplanar radius-of-curvature is less, then the impact of prism 102 surface reflection on main optical path is less, by choose reasonable radius-of-curvature, can effectively avoid prism 102 surface reflection on the impact of main optical path.In addition, by the described surface of contact 1021 of described at least two prisms 102 and described reflecting surface 1022 at least one of them is set to on-plane surface, because the actual hot spot of incident light L has certain angle of divergence, the size of hot spot can increase along with the increase of propagation distance, nonplanar setting is equivalent to convergent lens, the size of hot spot can be reduced, the angle of divergence of incident light L is retrained.
In the present embodiment, such as incident light L is sent by collimating apparatus, from the hot spot of collimating apparatus outgoing, there is certain angle of divergence, the parameter of light source 200 and collimating apparatus determines the variation relation between spot size and propagation distance, the size of hot spot can first reduce rear increase along with propagation distance or increase with the increase of propagation distance, and the position at the minimum place of hot spot is called beam waist position.In order to make the hot spot that is distributed on prism 102 less, the beam waist position of hot spot has been arranged on the inside of reflection cavity 101 by present embodiment, and namely the beam waist position of the hot spot of described incident light L is positioned at the inside of described reflection cavity 101.Because reflection cavity 101 is symmetrical, when beam waist position is positioned at reflection cavity 101 inside, the process that hot spot passes through repeatedly " poly-ly can disperse-understand poly-dispersing ", the size that can realize all hot spots on prism 102 is all less, therefore, by beam waist position being arranged on the inside of reflection cavity 101, the effect that hot spot on prism 102 is less can be realized, thus improve the surface utilisation of prism 102 further.
In the present embodiment, the face shaping of prism 102 is not limit, such as, be designed to circle, square etc.Nonplanar form of prism 102 is not limit, such as, can be sphere, cylinder, quadric surface, free form surface, aspheric surface etc., but not as limit.Placement location between prism 102 is not limit, i.e. prism 102 distance each other, and the relations such as angle can be determined by actual conditions, such as, can have angle between prism 102.The quantity of prism 102 is not limit, and the prism 102 of composition sample measuring cell 100 can more than two, or even the form of array device, if multiple prism 102, then comprise the arrangement form of prism 102, such as, can be arranged in one circumferentially, but not as limit.The size of prism 102 is not limit, and such as, prism 102 in same sample measuring cell 100 can not wait greatly.Prism 102 also can be arranged in pairs or groups with other components and parts and be used, such as by prism 102 and catoptron with the use of.Multiple prism 102 also can be made in one on the whole.Incidence and the emission mode of incident light L are not limit, and such as incident light L can from the side of prism 102 or light hole turnover.
As shown in Figure 7, the sample measuring cell 100 of present embodiment also comprises light source 200 and detector 300, light source 200 is for launching incident light L, detector 300 is for receiving the light of outgoing from sample measuring cell 100, all can assemble via lens 500 from the light of sample measuring cell 100 outgoing at every turn and enter detector 300, testing sample is such as solid, gas, liquid, liquid crystal, biological tissue etc., but not as limit.
As shown in Figure 8, described measurement procedure module map includes but not limited to light source control module 10, light source module 11, outer light path adjusting module 12, sample measuring cell 100, sample measuring cell monitoring modular 13, sample measuring cell control module 18, sample pretreatment module 14, photoelectric detection module 15, data acquisition and processing (DAP) module 16, data and image output module 17 to the measurement procedure module map of sample measuring cell 100 of the present invention.Need special instruction time, each measurement module shown in Fig. 8 can carry out suitable increase or minimizing according to actual measurement demand, as testing sample do not need pre-service time, sample pretreatment module 14 can omit.
Principle of work or the function of the modules of present embodiment are as described below:
Light source control module 10: described light source control module 10 is for controlling the functions such as the opening or closing of light source module 11, frequency modulation (PFM), electric current tuning, thermal tuning;
Light source module 11: described light source module 11 can have different forms according to the difference of Detection Techniques and request for utilization, includes but not limited to the combination of LASER Light Source, wideband light source, different frequency LASER Light Source, the combination etc. of LASER Light Source and wideband light source;
Outer light path adjusting module 12: described outer light path adjusting module 12 for changing polarisation of light character, the angle of divergence of light beam, the energy distribution etc. of light field, and feeds back signal to light source control module 10.Described outer light path adjusting module 12 has included but not limited to deflection device, optical coupled, has cut electro-optical device etc.;
Sample measuring cell 100: described sample measuring cell 100 is optical delay system, for increasing travel path, the increase light path of light, improve systematic survey sensitivity, described sample measuring cell 100 includes but not limited to multiple reflections room, optical resonator etc.;
Sample measuring cell monitoring modular 13: described sample measuring cell monitoring modular 13 for monitoring the duty of reflection cavity 101, the equivalent absorption light path of fault warning, online real-time calibration sample measuring cell 100, and provides monitor signal to sample measuring cell control module 18;
Sample measuring cell control module 18: the relative position relation of optical device in the monitor signal online real time correction sample measuring cell 100 that described sample measuring cell control module 18 provides for measuring cell monitoring modular 13 per sample, sample measuring cell control module 18 include but not limited at least one piece of PZT or other there is the physical construction of translation spinfunction or device or its combination realize, thus change the relative position relation of sample measuring cell 100 optical device;
Sample pretreatment module 14: described sample pretreatment module 14 for carrying out pre-service to testing sample, described sample pretreatment module 14 include but not limited to heat in testing sample, moisture in filtering sample, filtering sample with measure irrelevant other impurity, filtering dusts etc.;
Photoelectric detection module 15: the light signal that described photoelectric detection module 15 exports for receiving and detect sample measuring cell 100, and light signal is changed into electric signal, carry out the process such as the filtering of signal, amplification, analog to digital conversion;
Data acquisition and processing (DAP) module 16: the photoelectric figure signal after the collection of described data acquisition and processing (DAP) module 16 transforms, and be averaged, the spectral signal process such as concentration calculating;
Data and image output module 17: described data and image output module 17 are for exporting data and the image information such as spectrum line, molecular spectrum absorption intensity, concentration value of sample.It should be noted that, the setting of described data and image output module 17 is in order to information such as display element concentration, its form and structure unrestricted.
Sample measuring cell 100 of the present invention is according to the difference of the concrete condition such as quantity, position, form of reflection configuration 102, numerous embodiments can be had, just illustrate other embodiments of the present invention below, but embodiments of the present invention are not limited with the quantity of concrete example, for convenience of explanation, clipped element, and identical element uses identical label.
As shown in Figure 9, in present embodiment, sample measuring cell 100 comprises two prisms 102, and the surface of contact 1021 of one of them prism 102 of two prisms 102 is set to on-plane surface.
As shown in Figure 10, in present embodiment, sample measuring cell 100 comprises two prisms 102, and a reflecting surface 1022 of one of them prism 102 of two prisms 102 is set to on-plane surface, meanwhile, a reflecting surface 1022 of wherein another prism 102 is also set to on-plane surface.
As shown in figure 11, in present embodiment, sample measuring cell 100 comprises two prisms 102, and the surface of contact 1021 of one of them prism 102 of two prisms 102 is set to on-plane surface, meanwhile, the surface of contact 1021 of wherein another prism 102 is set to on-plane surface.
As shown in figure 12, in present embodiment, sample measuring cell 100 comprises two prisms 102, and two reflectings surface 1022 of one of them prism 102 of two prisms 102 are set to on-plane surface.
As shown in figure 13, in present embodiment, sample measuring cell 100 comprises two prisms 102, and four of two prisms 102 reflectings surface 1022 are all set to on-plane surface.
As shown in figure 14, in present embodiment, sample measuring cell 100 comprises two prisms 102, and a reflecting surface 1022 of one of them prism 102 of two prisms 102 is set to on-plane surface, but the size of one of them prism 102 of two prisms 102 is less than the size of wherein another prism 102, so, incident light L can from the non-overlapped portions incident of two prisms 102.
As shown in figure 15, in present embodiment, sample measuring cell 100 comprises two prisms 102, the surface of contact 1021 of prism 102 is on-plane surface, on-plane surface such as can be sphere, cylinder, quadric surface, free form surface, aspheric surface etc., but not as limit, at least one of them can be provided with light hole at two prisms 102, the first angle theta is formed between two prisms 102, the scope of the first angle theta can be 0 ° ~ 360 ° (comprising 0 °), by the adjustment of angle, light transmition path can be controlled, make the versatility of sample measuring cell 100 stronger, and the utilized area in the face of prism 102 reflexs can be made wider.Described first angle theta is defined as the angle between the axis of prism 102, and the axis of prism 102 is defined as: the intersection of the intersection of two reflectings surface 1022 of prism 102 or the elongated surfaces of reflecting surface 1022.As shown in Figure 15 and Figure 16, the intersection of two reflectings surface 1022 of two one of them prisms 102 of prism 102 is the first intersection 10251, the intersection of two prisms 102 wherein two reflectings surface 1022 of another prism 102 is that the angle between the second intersection 10252, first intersection 10251 and the second intersection 10252 is the first angle theta.
In another embodiment of the present invention, described reflection configuration 102 can be two two mirror catoptron 102 ', two mirror catoptrons 102 ' be oppositely arranged and refers to the catoptron 102 ' of light catoptron 102 ' internal reflection twice.As shown in figure 17, present embodiment is for two catoptrons 102 ', two catoptrons 102 ' are arranged at the border of described reflection cavity 101 ' respectively, each catoptron 102 ' comprises two surface of contact 1021 ' and two reflectings surface 1022 ', described surface of contact 1021 ' contacts described testing sample, described reflecting surface 1022 ' is away from described testing sample, described two reflecting surface 1022 ' intersections form a juncture area 1025 ', described incident light L is configured to when described incident light L propagates in described sample measuring cell 100 ', the travel path of described incident light L extends along described juncture area 1025 '.In the present embodiment, two reflectings surface 1022 ' of catoptron 102 ' are all coated with reflectance coating.
As shown in figure 18, described catoptron 102 ' forms the first plane 1027 ' and the second plane 1028 ', described two reflecting surface 1022 ' intersections of described catoptron 102 ' form an axis 1025 ', described axis 1025 ' is juncture area 1025 ', described first plane 1027 ' is perpendicular to described axis 1025 ', described second plane 1028 ' is perpendicular to described first plane 1027 ' and comprise described incident light L, angle β between described incident light L and described first plane 1027 ' is greater than 0 ° and is less than 90 °, but not as limit.Incident light L can not be positioned at the second plane 1028 ', and also can not strictly equal angle β, namely incident light L can have error range, and described error range can be β ± 10 °, but not as limit.
The structure of the catoptron 102 ' of present embodiment and characteristic with reference to the explanation of above-mentioned prism 102, can not repeat them here, the reflecting surface 1022 ' of the catoptron 102 ' of such as present embodiment and surface of contact 1021 ' at least one of them is on-plane surface etc.
As shown in figure 19, in present embodiment, sample measuring cell 100 ' comprises a catoptron 102 ', described catoptron 102 ' comprises two surface of contact 1021 ' and two reflectings surface 1022 ', incident light L can between two of a catoptron 102 ' reflecting surface 1022 ' multiple reflections, so, can guarantee long light path and environmental suitability while, reduce the manufacture difficulty of catoptron 102 ', also improve the flexibility ratio that catoptron 102 ' uses.
As shown in Figure 20 and Figure 21, in present embodiment, sample measuring cell 100 ' comprises two catoptrons 102 ', described two catoptrons 102 ' are spliced into square ring, namely now reflection cavity 101 ' is the center section of square ring catoptron 102 ', and described catoptron 102 ' has light hole 1023 ', and incident light L enters in reflection cavity 101 ' from light hole 1023 ', and through described surface of contact 1021 ' multiple reflections between reflecting surface 1022 ', emergent light can penetrate from light hole 1023 '.So, increased the area of the reflecting surface 1022 ' of reflex, can increase the number of times of light multiple reflections, improve optical path length, in another embodiment, square ring catoptron 102 ' also can be formed in one.
As shown in figure 22, in the present embodiment, sample measuring cell 100 ' comprises two catoptrons 102 ', form the second angle between described two catoptrons 102 ', by the adjustment of angle, light can be controlled and relay path, make the versatility of sample measuring cell 100 ' stronger, and the utilized area of reflecting surface 1022 ' can be made wider, the definition of the second angle see the definition of the first angle theta of prism 102 in above-mentioned embodiment, can not repeat them here.
In other embodiments of the present invention, prism 102, catoptron 102 ' or miscellaneous part can combinationally use according to actual needs, improve the flexibility ratio of use.
As shown in figure 23, in the present embodiment, sample measuring cell 100 comprises a prism 102 and a catoptron 102 ', described prism 102 comprises a surface of contact 1021 and two reflectings surface 1022, described catoptron 102 ' comprises two surface of contact 1021 ' and two reflectings surface 1022 ', and described incident light L is multiple reflections between described reflecting surface 1022,1022 '.As shown in Figure 24 and Figure 25, the size that described prism 102 can be two little prisms 102 ' ' be spliced, two little prisms 102 ' ' can be similar and different, two little prisms 102 ' ' between angle adjustable, so, the flexibility ratio of use and the range of adjustment can be improved.
As shown in figure 26, in the present embodiment, sample measuring cell 100 comprises a catoptron 102 ' and level crossing 103, described catoptron 102 ' comprises two surface of contact 1021 ' and two reflectings surface 1022 ', described level crossing 103 comprises a surface of contact 1031 and a reflecting surface 1032, the reflecting surface 1032 of described level crossing 103 away from described reflection cavity 101, described incident light L multiple reflections between described reflecting surface 1022 ' and 1032.
As shown in Figure 27 and Figure 28, in the present embodiment, sample measuring cell 100 comprises a hollow reflective mirror 104 and a level crossing 103, described hollow reflective mirror 104 comprises a surface of contact 1041 and two reflectings surface 1042, described two reflectings surface 1042 are arranged in the hollow area 1046 of described hollow reflective mirror 104, described reflecting surface 1042 is away from reflection cavity 101, described surface of contact 1041 contact reflex chamber 101, incident light L arrives described reflecting surface 1042 through surface of contact 1041, described level crossing 103 comprises a surface of contact 1031 and a reflecting surface 1032, the reflecting surface 1032 of described level crossing 103 is away from described reflection cavity 101, described incident light L is at described reflecting surface 1042, multiple reflections between 1032.The reflecting surface 1042 of present embodiment is positioned at hollow area 1046, makes the protected effect of reflecting surface 1042 better.
In sum, reflection configuration 102 of the present invention replaces the reflection configuration of tradition plating external reflection film, because the reflecting surface 1022 of reflection configuration 102 is away from testing sample, do not contact with testing sample, thus solve the problem of the reflection configuration environmental suitability difference of tradition plating external reflection film; The present invention is while providing long light path, and the adaptive capacity to environment of sample measuring cell 100 obtains great lifting, has taken into account long light path and the strong advantage of environmental suitability; The travel path of the multiple reflections of incident light L of the present invention, not in same plane, effectively improves the utilization factor of optical path length and reflecting surface 1022; The present invention, by the nonplanar radius-of-curvature of choose reasonable, effectively reduces the parasitic light in sample measuring cell 100; It is closed that the present invention can realize the distribution form of hot spot on reflection configuration 102, thus improves stability, realizes miniaturization; The beam waist position of hot spot is arranged on the inside of reflection cavity 101 by the present invention, optimizes the size of hot spot on reflection configuration 102 with this, improves the surface utilisation of reflection configuration 102 further.
Be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
A series of detailed description listed is above only illustrating for feasibility embodiment of the present invention; they are also not used to limit the scope of the invention, all do not depart from the skill of the present invention equivalent implementations done of spirit or change all should be included within protection scope of the present invention.
Claims (10)
1. a sample measuring cell, is characterized in that, described sample measuring cell comprises:
Reflection cavity, for accommodating testing sample; And
At least one reflection configuration, at least one reflection configuration described is arranged at the border of described reflection cavity;
Wherein, described reflection configuration comprises two reflectings surface and at least one surface of contact, described surface of contact contacts described testing sample, described reflecting surface is away from described testing sample, described reflecting surface is fully reflecting surface or non-fully reflecting surface, when described reflecting surface is fully reflecting surface, the travel path of the multiple reflections of incident light in described reflection cavity is not in a plane; When described reflecting surface is non-fully reflecting surface, described non-fully reflecting surface is coated with reflectance coating.
2. sample measuring cell according to claim 1, is characterized in that, at least one reflection configuration described is two secondary counter emitting prisms be oppositely arranged.
3. sample measuring cell according to claim 1, is characterized in that, at least one reflection configuration described is two two mirror catoptrons be oppositely arranged.
4. the sample measuring cell according to claim 1,2 or 3, it is characterized in that, described secondary counter emitting prism or described two mirror catoptrons form the first plane and the second plane, described two reflecting surface intersections of described secondary counter emitting prism or described two mirror catoptrons form an axis, described first plane orthogonal is in described axis, described second plane orthogonal is in described first plane and comprise described incident light, and the angle between described incident light and described first plane is greater than 0 ° and is less than 90 °.
5. the sample measuring cell according to claim 1,2 or 3, is characterized in that, described surface of contact and described reflecting surface at least one of them is on-plane surface.
6. sample measuring cell according to claim 5, is characterized in that, described on-plane surface is sphere, cylinder, quadric surface, free form surface or aspheric surface.
7. the sample measuring cell according to claim 1,2 or 3, is characterized in that, the beam waist position of the hot spot of described incident light is positioned at the inside of described reflection cavity.
8. the sample measuring cell according to claim 1,2 or 3, is characterized in that, has angle between at least one reflection configuration described, and described angle span is 0 ° ~ 360 °.
9. the sample measuring cell according to claim 1,2 or 3, is characterized in that, described reflecting surface is provided with operator guards, and described operator guards is for the protection of described reflecting surface.
10. the sample measuring cell according to claim 1,2, is characterized in that, when described reflecting surface is fully reflecting surface, described reflecting surface is provided with reflectance coating.
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| CN106644068A (en) * | 2016-12-30 | 2017-05-10 | 聚光科技(杭州)股份有限公司 | Long-optical-path optical system |
| CN106596408A (en) * | 2017-01-10 | 2017-04-26 | 安徽大学 | Triangular structure-based long range spectral absorption cell |
| CN107402185A (en) * | 2017-07-31 | 2017-11-28 | 三代光学科技（天津）有限公司 | A kind of free form surface gas cell and its processing method |
| CN107678156A (en) * | 2017-10-23 | 2018-02-09 | 深圳市太赫兹科技创新研究院有限公司 | Optical texture and deferred mount |
| CN108195799A (en) * | 2018-02-12 | 2018-06-22 | 中国科学院光电研究院 | A kind of penetration by liquid rate measuring device and method based on total reflection principle |
| CN108195799B (en) * | 2018-02-12 | 2024-05-03 | 中国科学院光电研究院 | Liquid transmittance measuring device and method based on total reflection principle |
| CN108333131A (en) * | 2018-02-14 | 2018-07-27 | 天津同阳科技发展有限公司 | Tail gas measuring devices and methods therefor |
| CN108507959A (en) * | 2018-06-01 | 2018-09-07 | 济南盛泰电子科技有限公司 | A kind of variable light path gas absorption gas chamber sensor-based system |
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| CN109975241A (en) * | 2019-02-27 | 2019-07-05 | 哈尔滨工业大学 | A kind of corner reflection enhancing optoacoustic spectroscopy formula trace gas detection device and method |
| WO2021212931A1 (en) * | 2020-04-23 | 2021-10-28 | 山东省科学院激光研究所 | Two-dimensional, multi-point-reflection, long-optical-distance gas sensor probe, and gas sensor |
| CN113008866A (en) * | 2021-03-05 | 2021-06-22 | 云南电网有限责任公司电力科学研究院 | Detection apparatus for GIS decomposed gas |
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