TWI790185B - Optical analysis system and optical analyzer - Google Patents

Abstract

An optical analyzer includes a solid-state light source transmitter, a light splitting or light mixing element, a first optical receiver, and a second optical receiver. The solid-state light source emitter includes a light source. The light source includes a plurality of light-emitting elements, and each emitting light having at least one luminous peak wavelength and at least one wavelength range. The light rays emitted by the light-emitting elements passes through the light splitting or light mixing element to form a first light and a second light. The second light is not absorbed by the fluid after it passes through a fluid to be tested so as to obtain a detection light. The first optical receiver receives the first light. The second optical receiver receives the detection light.

Description

Optical analysis system and its optical analyzer

The present invention relates to the technical field of penetrating optical analysis, in particular to an optical analysis system and an optical analyzer thereof which use two optical receivers to respectively receive light from a light source to determine whether the luminous intensity of the light source has declined.

Existing optical analyzers can be divided into single-beam spectrometer and double-beam spectrometer. In single-beam spectrometer, the detection principle is to make the light source emit two detection rays and pass through the corresponding monochromator respectively, and then pass through the light cutter. Rotation to adjust the two detection light passes through the liquid to be measured in the absorption cell respectively, the liquid to be measured will absorb detection light of different wavelengths due to its different components, after the detection light passing through the absorption cell is received by the detector, it is obtained The absorption spectrum of the liquid to be tested is used to detect the physical or chemical properties of the liquid to be tested. However, the single-beam spectrometer uses the mirror rotation of the optical chopper to switch the detection light of different frequencies. When the mirror rotation speed is slow, the wavelength cannot be switched quickly. The complete absorption spectrum is measured. Moreover, the two detection lights will first pass through the absorption cell and then be received by the detector. Therefore, it is impossible to monitor the light intensity of the original detection light, and it is difficult to know in real time whether the light source intensity has attenuated.

In the double-beam spectrometer, as shown in Figure 1, the detection principle is to use the light source 1 to emit light and pass through the beam splitter 21 so that the path of the light is divided into the detection light path P1 and the contrast light path P2, in the detection light path P1 , the light passes through the liquid to be measured in the absorption cell 3, the liquid to be measured will absorb light of different wavelengths due to its different components, the light passing through the absorption cell 3 is received by the first detector 4, and the absorption spectrum of the liquid to be measured is obtained , and in the comparison light path P2, the light can be directly received by the second detector 5 to form a comparison spectrum, and finally the physical or chemical properties of the liquid to be tested are analyzed and detected through the above absorption spectrum and comparison spectrum. However, if multiple mirrors are used, as shown in Figure 1, adding a light chopper R2 to change the direction of the contrast light path P2, the mirrors need to be sealed to prevent dust, and the number of configured mirrors increases. Existing optical analyzers have relatively large volumes and cannot be made into portable products. In addition, when the light intensity is too low after the light is split by the beam splitter R1, if the liquid to be tested has a large absorption of light, the spectrum cannot be formed. On the other hand, if the angle of the beam splitter R1 changes It also affects the change in light intensity.

Therefore, the present invention explains how to effectively improve the above-mentioned problems of existing single-beam spectrometers and double-beam spectrometers through innovative hardware design, and developers and researchers in related industries still need to continue to work hard to overcome them. and problems to be solved.

In view of this, the purpose of the present invention is to provide an optical analysis system and its optical analyzer, which has a plurality of light-emitting elements, which can sequentially emit light in different wavelength ranges, and by setting two optical receivers, comparing two The difference of the light received by the optical receiver is used to determine whether the light intensity of the light emitted by the light emitting element is attenuated.

One embodiment of the optical analyzer of the present invention includes a solid state light source transmitter, a homogeneous mixing or splitting element, a first optical receiver, and a second optical receiver. The solid-state light source transmitter includes a light source, the light source includes a plurality of light-emitting elements each emitting light having at least one luminous peak wavelength and at least one wavelength range, and the light-emitting elements are light-emitting diodes, vertical resonant cavity surface-emitting lasers or A laser diode, and a plurality of light-emitting elements can respectively exhibit discontinuous light with a flickering frequency, and the plurality of flickering frequencies can be the same or different from each other, or the plurality of flickering frequencies can be partly the same or partly different. The light emitted by the light-emitting elements passes through the uniform mixing or light-splitting element to form a first light and a second light. The second light passes through a fluid object to be tested and is not absorbed by the fluid object to obtain a detection light. The first optical receiver receives the first light. The second optical receiver receives the detection light.

In another embodiment, when the first light has a standard light intensity, the light intensity of the second light is equal to the standard light intensity, and the ratio of the detection light to the standard light intensity is a standard transmittance of the fluid to be tested, And when the first light has a working light intensity, the light intensity of the second light is equal to the working light intensity, the ratio of the detection light to the working light intensity is one of the working penetration rate of the fluid to be tested, and the standard light intensity is equal to the working light intensity. If the intensity is different, compare whether the standard penetration rate is the same as the working penetration rate, and judge the composition change of the fluid to be tested according to the comparison result.

In another embodiment, when the first light has a standard light intensity, the first optical receiver receives the first light and generates a standard light intensity signal, and when the first light has an attenuated light intensity, the first optical receiver The receiver receives the first light and generates an attenuated light intensity signal, compares a variation between the standard light intensity signal and the attenuated light intensity signal, and the light splitting element adjusts the light intensity of the first light according to the variation.

In another embodiment, the uniform mixing or light splitting element is an optical integrating sphere, the optical integrating sphere includes a light entrance, a first light exit and a second light exit, the first optical receiver is aligned with the first light exit, The second optical receiver is aligned with the second light exit, the light rays emitted by the light emitting elements enter the optical integrating sphere through the light entrance, the first light exits from the first light exit, and the second light exits from the second light exit.

In another embodiment, the first light exit and the light entrance are separated by a central angle of 90 degrees relative to the center of the optical integrating sphere, and the second light exit is separated from the light entrance by a central angle of 90 degrees relative to the center of the optical integrating sphere , and the first light exit and the second light exit are separated by a central angle of 90 degrees relative to the center of the optical integrating sphere.

In another embodiment, the uniform mixing or light-splitting element is a light-splitting plate, the light-splitting plate has a through hole, the first optical receiver is arranged on the light-splitting plate and opposite to the light-emitting elements, and the light emitted by the light-emitting elements A part of the light becomes the first light and is received by the first optical receiver, and another part of the light emitted by the light-emitting elements passes through the through hole to become the second light.

In another embodiment, the wavelength ranges of two light-emitting elements corresponding to two adjacent luminous peak wavelengths partially overlap to form a continuous wavelength range wider than the wavelength range of each of the light-emitting elements , or the wavelength ranges of the two light-emitting elements corresponding to two adjacent luminous peak wavelengths do not overlap.

In another embodiment, a plurality of light-emitting elements are sequentially emitting light, and the aforementioned sequential light-emitting means that a plurality of light-emitting elements in different positions emit light in the same wavelength range and a plurality of light-emitting elements do not emit light at the same time; or, a plurality of A plurality of light-emitting elements are partially emitting light at the same time. The above-mentioned partial light-emitting at the same time refers to a plurality of light-emitting elements, so that some of them emit light at the same time and emit light in different wavelength ranges at the same time.

In another embodiment, the solid-state light source transmitter further includes a substrate for measuring a certain current bias value of the light-emitting elements when they are in operation, and by using the constant current bias value of the light-emitting elements and the PN of a solid-state light source The mathematical relational expression or corresponding table or diagram of the junction temperature is converted to obtain the PN junction temperature of the solid-state light source, and then the mathematical relational expression or corresponding table or diagram between the light intensity of the light-emitting elements and the PN junction temperature is obtained. The ratio of the luminous intensity of the luminous elements, and according to a judgment result, the value of the light intensity emitted by the luminous elements measured by the first optical receiver is corrected.

In another embodiment, the optical analyzer of the present invention further includes a first processor and a first display device, the solid-state light source transmitter, the first optical receiver and the second optical receiver are connected to the first processor, The first processor controls the solid-state light source transmitter to emit the light in sequence, and the light intensity signals received by the first optical receiver and the second optical receiver are displayed on the first display device.

In another embodiment, the optical analyzer of the present invention further includes a first wireless communication module connected to the first processor, the light intensity signal received by the first optical receiver and the second optical receiver It can transmit to the external electronic device through the first wireless communication module, or receive the control signal from the external electronic device.

In another embodiment, the flickering frequency is between 0.05 times/second and 50000 times/second.

In another embodiment, the time interval for turning on the light-emitting element in the flickering frequency is between 0.00001 second and 10 seconds.

In another embodiment, the time interval for turning off the light-emitting element in the flickering frequency is between 0.00001 second and 10 seconds.

In another embodiment, the difference between two adjacent luminescence peak wavelengths is between 1 nm and 80 nm.

In another embodiment, the difference between two adjacent luminescence peak wavelengths is between 5 nm and 80 nm.

In another embodiment, the wavelength half maximum width corresponding to each of the luminous peak wavelengths is between 15 nm and 50 nm.

In another embodiment, the wavelength half maximum width corresponding to each of the luminous peak wavelengths is between 15 nm and 40 nm.

In another embodiment, the difference between two adjacent luminous peak wavelengths is greater than or equal to 0.5 nm.

In another embodiment, the difference between two adjacent luminescence peak wavelengths is between 1 nm and 80 nm.

In another embodiment, at least a part of the peak luminescence wavelengths among the plurality of peak luminescence wavelengths has a wavelength half maximum width greater than 0 nm and less than or equal to 60 nm.

The present invention provides an optical analysis system, which includes an optical analyzer and a liquid conveying member, a liquid to be tested is conveyed in the liquid conveying member, the uniform mixing or light splitting element and the second optical receiver are arranged on the liquid conveying member The second light passes through the liquid conveying element and forms the detection light to be received by the second optical receiver.

In the optical analysis system and optical analyzer of the present invention, the light source has a plurality of light-emitting elements that emit light in different wavelength ranges and emits light one by one, so there is no need to install a monochromator in the prior art, and the volume of the optical analyzer can be greatly reduced. Moreover, the optical analyzer of the present invention is provided with a first optical receiver and a second optical receiver, which can detect the attenuation state of the light intensity of the light emitting element.

Please refer to Fig. 2 and Fig. 3, which represent an embodiment of the optical analyzer of the present invention. The optical analyzer 100 of this embodiment includes a solid-state light source transmitter 10 , a uniform mixing or splitting element 20 , a first optical receiver 30 and a second optical receiver 40 . The solid-state light source transmitter 10 includes a light source, and the light source includes a plurality of light-emitting elements 13 each emitting light having at least one luminous peak wavelength and at least one wavelength range. These light-emitting elements 13 are light-emitting diodes, vertical cavity surface-emitting types A laser or a laser diode, and a plurality of light-emitting elements 13 can respectively present a discontinuous light emission with a flickering frequency, and the multiple flickering frequencies can be the same or different from each other, or the multiple flickering frequencies can be partly the same or partly different .

The light emitted by the light-emitting elements 13 passes through the uniform mixing or light-splitting element 20 to form a first light L1 and a second light L2, and the second light L2 is not absorbed by the fluid test object after passing through a fluid test object O. A detection light L3 is obtained. The first optical receiver 30 receives the first light L1. The second optical receiver 40 receives the detection light L3. Wherein, when the first light L1 has a standard light intensity, the light intensity of the second light L2 is equal to the standard light intensity, and the ratio of the detection light L3 to the standard light intensity is one of the fluid analyte O Standard transmittance, and when the first light L1 has a working light intensity, the light intensity of the second light L2 is equal to the working light intensity, and the ratio of the detection light L3 to the working light intensity is the fluid to be tested One of the working transmittances of the object O, the standard light intensity is different from the working light intensity, compare whether the standard transmittance is the same as the working transmittance, and judge the composition of the fluid to be tested O according to the comparison result For example, the fluid analyte O can be used as a working liquid for printed circuit board (PCB), semiconductor, petrochemical or food processing industries, and the standard penetration rate represents that the fluid analyte O has a normal The proportion and concentration of the required components during work. When the standard penetration rate is the same as the working penetration rate or the difference is within a tolerable range, it can be judged that the composition of the fluid to be tested O still meets the needs of the user , and when the standard penetration rate is different from the working penetration rate and the difference is within an intolerable range, it can be judged that the composition ratio and concentration of the fluid analyte O have changed, resulting in abnormal working conditions. The required working liquid, and the current working liquid needs to be replaced or adjusted. In the present invention, the first optical receiver 30 that receives the first light L1 and the second optical receiver 40 that receives the detection light L3 that passes through the fluid test object O can be used to monitor or dynamically continuously record the current fluid test object in real time. Whether the penetration rate of O and its composition ratio and concentration meet the quality required for normal work, or further calculate the service life, and make preparations for replacing or adjusting the fluid to be tested O in advance.

The light emitted by the light-emitting elements 13 passes through the uniform mixing or light-splitting element 20 to form a first light L1 and a second light L2, and the second light L2 is not absorbed by the fluid test object after passing through a fluid test object O. A detection light L3 is obtained. The first optical receiver 30 receives the first light L1. The second optical receiver 40 receives the detection light L3. Wherein, when the first light L1 has a standard light intensity, the first optical receiver 30 receives the first light L1 and generates a standard light intensity signal, and when the first light L1 has an attenuated light intensity, The first optical receiver 30 receives the first light L1 and generates an attenuated light intensity signal, compares a change amount between the standard light intensity signal and the attenuated light intensity signal, and the uniform mixing or light splitting element 20 according to the change amount Adjust the light intensity of the first light L1 to obtain a measurement system with constant light intensity. The present invention can monitor in real time whether the light intensity of the light source of the solid-state light source transmitter 10 is attenuated through the first optical receiver 30 receiving the first light L1, and the change amount of attenuation of the light intensity signal, so as to further adjust or replace the solid-state light source transmitter 10 The light source.

The uniform mixing or light splitting element 20 of the present embodiment is an optical integrating sphere, the optical integrating sphere includes a light entrance 21, a first light exit 22 and a second light exit 23, and the first optical receiver 30 is aimed at the first light exit 22, the second optical receiver 40 is aimed at the second light exit 23, the light rays emitted by the light emitting elements 13 enter the optical integrating sphere through the light entrance 21, the first light L1 exits from the first light exit 22, the second The light L2 exits from the second light outlet 23 . As shown in Figure 2, the first light exit 22 and the light entrance 21 are separated by a central angle of 90 degrees relative to the center of the optical integrating sphere, and the second light exit 23 is separated by 90 degrees from the light entrance 21 relative to the center of the optical integrating sphere. degree, and the first light outlet 22 and the second light outlet 23 are separated by a central angle of 90 degrees relative to the center of the optical integrating sphere.

The optical integrating sphere of the uniform mixing or light splitting element 20 of the present embodiment is arranged in a housing 6, the solid-state light source transmitter 10 and the first optical receiver 30 are respectively arranged on the side wall of the housing 6, and the housing The body 6 has an opening 61 , and the opening 61 is aligned with the second light outlet 23 , so that the second light L2 can exit from the housing 6 through the opening 61 .

Please refer to Fig. 4, which shows another embodiment of the optical analyzer of the present invention. Part of the structure of this embodiment is the same as that of the embodiment in Fig. 2, so the same elements are assigned the same symbols and their descriptions are omitted. The uniform mixing or light-splitting element 20' of this embodiment is a light-splitting plate, and the light-splitting plate has a through hole 24. The first optical receiver 30 is arranged on the light-splitting plate and opposite to the light-emitting elements 13. The light emitted by the light-emitting elements 13 Part of the light becomes the first light L1 and is received by the first optical receiver 30 , and another part of the light emitted by the light emitting elements 13 passes through the through hole 24 to become the second light L2 . The second light L2 passes through the fluid object O to form a detection light L3 and is received by the second optical receiver 40 . Likewise, compare whether the intensity of the first light L1 is the same as that of the detection light L3, and adjust the light intensity of the light emitted by the light emitting elements 13 according to the comparison result.

In addition, for the light emitted by the light-emitting element 13 of the light source of the solid-state light source emitter 10 of the present invention, the wavelength ranges of the two light-emitting elements 13 corresponding to the two adjacent light-emitting peak wavelengths partially overlap to form A continuous wavelength range wider than the wavelength range of each of the light emitting elements 13 , or the wavelength ranges of the two light emitting elements 13 corresponding to two adjacent luminous peak wavelengths do not overlap.

Please refer to Figure 5, the wavelength ranges of the two adjacent light-emitting diodes corresponding to the luminous peak wavelengths partially overlap to form a wavelength range wider than that of each of the light-emitting diodes A continuous wavelength range, the continuous wavelength range is between 180nm and 2500nm. In Figure 2, there are three luminous peak wavelengths and corresponding wavelength ranges, which are respectively the first wavelength range corresponding to a first luminous peak wavelength (734nm) of a first light, and a second wavelength range of a second light. The second wavelength range corresponding to the emission peak wavelength (810nm) and the third wavelength range corresponding to a third emission peak wavelength (882nm) of a third light. The first luminescence peak wavelength and the second luminescence peak wavelength are two adjacent luminescence peak wavelengths, and likewise the second luminescence peak wavelength and the third luminescence peak wavelength are also two adjacent luminescence peak wavelengths. The first wavelength range corresponding to the first luminescence peak wavelength is between 660nm and 780nm, and the second wavelength range corresponding to the second luminescence peak wavelength of the second light is between 710nm and 850nm , the first wavelength range and the second wavelength range partially overlap between 710nm and 780nm, so the first wavelength range and the second wavelength range jointly form the continuous wavelength range between 660nm and 850nm. Similarly, the second wavelength range corresponding to the second luminescence peak wavelength is between 710nm and 850nm, and the third wavelength range corresponding to the third luminescence peak wavelength of the third light is between 780nm and 850nm. 940nm, the second wavelength range and the third wavelength range partially overlap between 780nm and 850nm, so the second wavelength range and the third wavelength range jointly form the continuous wavelength range between 710nm and 940nm. In the present invention, the overlapping portions of the wavelength ranges of the two adjacent light-emitting diodes corresponding to the two adjacent light-emitting peak wavelengths should be as small as possible. Of course, the wavelength ranges of the two light-emitting diodes corresponding to the two adjacent light-emitting peak wavelengths may not overlap, which will be described later.

The difference between two adjacent luminous peak wavelengths is greater than or equal to 0.5 nm, preferably between 1 nm and 80 nm, more preferably between 5 nm and 80 nm. In Figure 2, the difference between the adjacent first luminous peak wavelength (734nm) and the second luminous peak wavelength (810nm) is 76nm, and the adjacent second luminous peak wavelength (810nm) and the third The luminescence peak wavelengths (882 nm) differ from each other by 72 nm. Unless otherwise specified, the limitation of the numerical range described in the present invention and the scope of the patent always includes the end value, for example, the difference between the aforementioned two adjacent luminous peak wavelengths is between 5nm and 80nm, which means greater than Or equal to 5nm and less than or equal to 80nm.

Please also refer to the second embodiment in FIG. 6 . The second embodiment is a derivative embodiment of the first embodiment, so the similarities between the second embodiment and the first embodiment will not be repeated here. The difference between the second embodiment and the first embodiment is that the light source of the second embodiment includes five light-emitting diodes, respectively emitting a first light-emitting diode and emitting one of a fourth wavelength range. A fourth light-emitting diode for the fourth light, a second light-emitting diode, a fifth light-emitting diode and a third light-emitting diode emitting a fifth light with a fifth wavelength range, the The fourth light has a fourth luminescence peak wavelength (772nm) within the fourth wavelength range, and the fifth light has a fifth luminescence peak wavelength (854nm) within the fifth wavelength range. In Figure 3, the luminescence peak wavelengths from small to large are the first luminescence peak wavelength (734nm), the fourth luminescence peak wavelength (772nm), the second luminescence peak wavelength (810nm), the fifth luminescence peak wavelength The peak wavelength (854nm) and the third luminescence peak wavelength (882nm), the difference between the adjacent first luminescence peak wavelength (734nm) and the fourth luminescence peak wavelength (772nm) is 38nm, and the adjacent fourth luminescence peak wavelength The difference between the peak wavelength (772nm) and the second luminescence peak wavelength (810nm) is 38nm, the difference between the adjacent second luminescence peak wavelength (810nm) and the fifth luminescence peak wavelength (854nm) is 44nm, and the adjacent The fifth luminescence peak wavelength (854nm) and the third luminescence peak wavelength (882nm) differ from each other by 28nm.

Please also refer to the third embodiment in Figure 7. The third embodiment is a derivative embodiment of the first embodiment and the second embodiment, so the third embodiment is the same as the first embodiment and the second embodiment I won't go into details. The difference between the third embodiment and the first embodiment is that the light source of the third embodiment includes 12 light-emitting diodes. The sequence is 734nm (the first luminescence peak wavelength), 747nm, 760nm, 772nm (the fourth luminescence peak wavelength), 785nm, 798nm, 810nm (the second luminescence peak wavelength), 824nm, 839nm, 854nm (the fifth luminescence peak wavelength) peak wavelength), 867nm and 882nm (the third luminescence peak wavelength). Among the luminescence peak wavelengths of the 12 light-emitting diodes, the difference between the two adjacent luminescence peak wavelengths is 13nm, 13nm, 12nm, 13nm, 13nm, 12nm, 14nm, 15nm, 15nm, 13nm and 15nm respectively . If the light-emitting element 13 in the first embodiment, the second embodiment and the third embodiment is a laser diode instead, the difference between two adjacent luminous peak wavelengths can be greater than or equal to 0.5 nm, For example, it is 1 nm.

The wavelength half maximum width corresponding to at least a part of the luminescence peak wavelengths among the plurality of luminescence peak wavelengths is greater than 0 nm and less than or equal to 60 nm. Preferably, the wavelength half maximum width corresponding to each of the luminous peak wavelengths is greater than 0 nm and less than or equal to 60 nm, for example, in the aforementioned first embodiment, second embodiment and third embodiment, the luminous peak wavelengths vary from small to large. The sequence is 734nm (the first luminescence peak wavelength), 747nm, 760nm, 772nm (the fourth luminescence peak wavelength), 785nm, 798nm, 810nm (the second luminescence peak wavelength), 824nm, 839nm, 854nm (the fifth luminescence peak wavelength) peak wavelength), 867nm and 882nm (the third luminescence peak wavelength), the wavelength half maximum width corresponding to the first luminescence peak wavelength of the first light, and the wavelength corresponding to the second luminescence peak wavelength of the second light half maximum width, the wavelength half maximum width corresponding to the third luminous peak wavelength of the third light, the wavelength half maximum width corresponding to the fourth luminous peak wavelength of the fourth light, and the fifth light width of the fifth light The wavelength half maximum width corresponding to the luminescence peak wavelength is greater than 0 nm and less than or equal to 60 nm, preferably between 15 nm and 50 nm, more preferably between 15 nm and 40 nm. The half-maximum wavelength (Figure 4) corresponding to the remaining unexplained 747nm, 760nm, 785nm, 798nm, 824nm, 839nm and 867nm luminous peak wavelengths is also greater than 0nm and less than or equal to 60nm, preferably between 15nm and 50nm between, more preferably between 15nm and 40nm. During the experimental operation of the present invention, the wavelength half maximum width corresponding to the luminous peak wavelength in the first embodiment, the second embodiment and the third embodiment is 55nm; if the light emitting element 13 is a laser diode, The wavelength half maximum width corresponding to each of the emission peak wavelengths is greater than 0 nm and less than or equal to 60 nm, for example, 1 nm.

The aforementioned wavelength ranges of the two light-emitting diodes corresponding to the two adjacent luminous peak wavelengths may not overlap, for example, if each of the aforementioned first embodiment, second embodiment and third embodiment The wavelength half maximum width corresponding to the luminescence peak wavelength is 15nm, the width of the wavelength range corresponding to each luminescence peak wavelength (that is, the difference between the maximum value and the minimum value of the wavelength range) is 40nm, and the two adjacent luminescence The peak wavelengths differ from each other by 80 nm. For another example, if the light-emitting element 13 is a laser diode, the wavelength half maximum width corresponding to each of the luminous peak wavelengths is 1 nm, the width of the wavelength range is 4 nm, and the difference between two adjacent luminous peak wavelengths is 5 nm. , the wavelength ranges of the two light-emitting elements (laser diodes) corresponding to the two adjacent luminous peak wavelengths do not overlap.

Preferably, when operating an imaging device in the first embodiment, the second embodiment and the third embodiment to detect the object to be tested to generate the spectrogram of the object to be tested, the imaging device is a mobile phone or a tablet computer, As mentioned above, the solid-state light source transmitter 10 can separately control and make the plurality of light-emitting diodes respectively present discontinuous light with a flickering frequency. The frequency can be partly the same or partly different. The aforementioned flickering frequency is between 0.05 times/second and 50,000 times/second, and the time interval for turning on (lighting) the light-emitting diode in the flickering frequency is between 0.00001 second Between 0.00001 second and 10 seconds, the time interval for turning off (extinguishing) the light-emitting diode in the flickering frequency is between 0.00001 second and 10 seconds. The sum of the time interval of the diode and the time interval of turning off (extinguishing) the light-emitting diode, the period of the on-off frequency is the reciprocal of the on-off frequency; The diode continuously lights up for a lighting time interval and immediately goes out continuously without interruption for a sum of an extinguishing time interval. The lighting time interval is between 0.00001 seconds and 10 seconds, and the extinguishing time interval is between 0.00001 seconds. to 10 seconds. Preferably, the blinking frequency is between 0.5 times/second and 50000 times/second; more preferably, the blinking frequency is between 5 times/second and 50000 times/second. The plurality of light-emitting diodes exhibiting discontinuous light emission can greatly reduce the influence of the analyte (A) by the heat energy of the light emitted by the light-emitting diodes, and avoid the analyte (A) containing organisms Therefore, it is especially suitable for the analyte (A) that is sensitive to thermal energy, and it is more especially suitable for the light in the wavelength range emitted by the light-emitting diode to be near-infrared light.

In addition, a plurality of light-emitting elements 13 are sequentially emitting light. The aforementioned sequential light-emitting means that the plurality of light-emitting elements 13 at different positions emit light in the same wavelength range. The plurality of light-emitting elements 13 do not emit light at the same time; Parts of the elements 13 emit light at the same time. The above-mentioned simultaneous light emission refers to making a part of the plurality of light emitting elements 13 emit light at the same time and emit light in different wavelength ranges at the same time.

Please refer to FIG. 8, which shows an embodiment of the solid-state light source emitter of the present invention. The solid state light source transmitter 10 of this embodiment includes a substrate 11 , a temperature sensor 12 and a plurality of light emitting elements 13 . The light-emitting elements 13 and the temperature sensor 12 are arranged on a junction 111 of the substrate 11, measure the bias voltage value of the light-emitting elements, and use the bias value of the light-emitting elements 13 and a junction temperature The junction temperature of the junction 111 is obtained by converting the mathematical relational formula or corresponding table or figure, and then the mathematical relational formula or corresponding table or figure between the light intensity of the light emitting elements 13 and the junction temperature is obtained. The light intensity of the light emitting elements 13 is determined to determine whether the light intensity of the light emitting elements 13 changes, and the light intensity of the light emitted by the light emitting elements 13 is adjusted according to the judgment result.

In another embodiment of the present invention, the solid-state light source transmitter 10 further includes a substrate 11, which measures a certain current bias value of the light emitting elements 13 when they are working, and uses the constant current bias value of the light emitting elements 13 to Value and a mathematical relational expression or corresponding table or figure conversion of the PN junction temperature of the solid-state light source emitter 10 to obtain the PN junction temperature of the solid-state light source emitter 10, and then use the light intensity of the light-emitting elements 13 The mathematical relational expression or the corresponding table or figure with the temperature of the PN junction can obtain the luminous intensity ratio of the light emitting elements 13, and correct the light emitted by the light emitting elements 13 measured by the first optical receiver 30 according to a judgment result. Light intensity value.

Due to the inverse relationship between the luminous intensity of each of the LEDs and its junction temperature, and the heat dissipation of the LEDs, the LEDs have been continuously operated under the current density. As time increases, the junction temperature will increase and the luminous intensity will decrease. Therefore, it is necessary to correct the luminous intensity with a luminous correction method. The luminescence correction method sequentially includes a calibration relationship acquisition step P01, a forward bias voltage measurement step P02, a proportional relationship acquisition step P03, and a calibration completion step P04. The luminescence correction method can be followed by the luminescence method. The filtering step S03 and the inverse conversion step S04 of the aforementioned spectral detection method are followed by the luminescence correction method. Please refer to FIG. 9A.

Calibration relationship acquisition step P01: Obtain the mathematical relational formula or corresponding table or graph between the luminous intensity or relative intensity and the junction temperature of each LED, usually provided by the LED manufacturer. Please refer to FIG. 9B, which is the corresponding graph of the relative intensity of the fourth light-emitting diode and the junction temperature, the fourth light-emitting peak wavelength of the fourth light-emitting diode at the junction temperature of 25 degrees Celsius is 772nm and the relative intensity is calculated as 100%. In addition, a mathematical relationship or a corresponding table or graph between the forward voltage and the junction temperature of each light-emitting diode is also obtained. The junction temperature of the fourth light-emitting diode is 25 degrees Celsius. The fourth luminescence peak wavelength at 100°C is 772 nm and the forward bias voltage is 2 volts. Please refer to FIG. 9C , which is a graph corresponding to the forward bias voltage of the fourth light-emitting diode and the junction temperature. The mathematical relationship or corresponding table or graph of the luminous intensity or relative intensity and the junction temperature, and the mathematical relationship or corresponding table or graph of the forward bias voltage of the light emitting diode and the junction temperature, both The way to obtain it can be found in [Journal of Science and Engineering Technology, Vol. . 3, No. 4, pp. 99-103 (2007)), and the method disclosed in the Republic of China Invention Patent Publication No. 200818363, so it is not repeated here.

The step of measuring the forward bias voltage P02: during the time interval of turning on (lighting up) the light-emitting diode, for example, in the time interval of turning on (lighting up) the light-emitting diode in the flickering frequency, measure the luminescence at the same time The forward bias of the diode. For example, in the aforementioned embodiments two and three, the flickering frequency of the fourth light-emitting diode is about 90.90 times per second, and the time interval for turning on (lighting) the light-emitting diode in the flickering frequency is 1 millisecond ( 1ms), the time interval for turning off (extinguishing) the light-emitting diode in the flickering frequency is 10 milliseconds (10ms), and the time interval for turning on (lighting) the fourth light-emitting diode in the flickering frequency, and simultaneously measure The forward bias voltage of the fourth LED is 1.9V.

The proportional relationship obtaining step P03: compare the measured forward bias voltage with the mathematical relational expression or corresponding table or figure between the forward bias voltage of the light-emitting diode and the junction temperature, and convert the measured forward bias voltage to obtain the junction temperature. surface temperature. For example, the measured forward bias voltage of the fourth light-emitting diode is 1.9 volts, and the junction temperature is 50 degrees Celsius according to FIG. 9C . Next, the converted junction temperature is compared with the aforementioned mathematical relationship formula or corresponding table or figure between the luminous intensity or relative intensity and the junction temperature to obtain the luminous intensity or relative intensity through conversion. For example, the junction temperature obtained by comparison is 50 degrees Celsius, and the relative intensity of the fourth light-emitting diode is 83% by comparison with FIG. 9B . Next, the converted luminous intensity or relative intensity is compared with the mathematical relationship between the luminous intensity or relative intensity and the junction temperature or the correspondence table or the luminous intensity or relative intensity at a specific junction temperature in the figure A proportional relationship is obtained by comparison. For example, the specific junction temperature is 25 degrees Celsius, the relative intensity of the fourth light-emitting diode at 25 degrees Celsius is 100%, and the relative intensity of the junction temperature of 25 degrees Celsius is 100% divided by 50 degrees Celsius When the relative intensity is 83%, the proportional relationship is 1.20 times.

The complete correction step P04: multiply the luminous intensity of the wavelength range corresponding to the light-emitting diode in the initial spectral energy distribution curve by the proportional relationship to achieve the correction of the luminous intensity; or, the measured The spectral signal related to the wavelength range corresponding to the light-emitting diode is multiplied by the proportional relationship to achieve correction of the spectral signal. The spectral signal in the wavelength range may be the aforesaid spectral signal of the analyte and the background noise to form the time-domain signal of the analyte. For example, the light detector or the calculator multiplies the fourth luminous intensity 17.7×10 ⁷ (au) corresponding to the fourth light-emitting diode by the proportional relationship to be 1.20 times, and the obtained luminous intensity can be regarded as The luminous intensity of the fourth light-emitting diode at the specific junction temperature (25 degrees Celsius).

In particular, the present invention refers to at least one of the light-emitting diodes, some of the light-emitting diodes, or all of the light-emitting diodes in the light source, sequentially or simultaneously The luminescence correction method is executed. Preferably, in the present invention, all the light-emitting diodes execute the luminescence correction method at the same time, and the spectral energy distribution curve obtained in this way can be regarded as the spectral energy distribution curve at the specific junction temperature (25 degrees Celsius), And the obtained spectral signal can be regarded as the spectral signal at the specific junction temperature (25 degrees Celsius).

Please refer to FIG. 10, which shows an embodiment of the optical analysis system of the present invention. In addition to the optical analyzer 100 shown in FIG. 2, the optical analysis system of the present embodiment also includes a liquid delivery member 200, a fluid to be tested O is transported in the liquid delivery member 200, and a uniform mixing or spectroscopic element 20 The second optical receiver 40 is disposed on both sides of the liquid conveying element 200 , the second light L2 passes through the liquid conveying element 200 and forms the detection light L3 to be received by the second optical receiver 40 . Although the optical analysis system shown in FIG. 10 includes the optical analyzer 100 shown in FIG. 2 , the present invention is not limited thereto, and the optical analyzer shown in FIG. 4 is also applicable to the optical analysis system of the present invention.

Please refer to FIG. 11, which shows a system block diagram of an embodiment of the optical analyzer of the present invention. In addition to the aforementioned solid-state light source transmitter 10, uniform mixing or light splitting element 20, first optical receiver 30, and second optical receiver 40, the optical analyzer of this embodiment also includes a first optical analyzer. The processor 50 , the first display device 60 and the first wireless communication module 70 . The solid-state light source transmitter 10, the first optical receiver 30 and the second optical receiver 40 are connected to the first processor 50, and the first processor 50 controls the solid-state light source transmitter 10 to emit the light in sequence, and the first optical receiver 30 and the light intensity signals received by the second optical receiver 40 are displayed on the first display device 60 , that is, the first display device 60 displays the absorption spectrum of the detection light L3 generated after the second light L2 passes through the object to be tested. The first wireless communication module 70 is connected to the first processor 50, and the light intensity signals received by the first optical receiver 30 and the second optical receiver 40 can be transmitted to an external electronic device through the first wireless communication module 70, or Receive a control signal from an external electronic device.

Please refer to FIG. 12, which shows a system block diagram of the electronic device for signal connection of the optical analyzer of the present invention. The external electronic device may be, for example, a mobile device or a computer device. The external electronic device E includes a second processor 110 , a second setting unit 120 , a second display device 130 and a second wireless communication module 140 . The second setting unit 120 , the second display device 130 and the second wireless communication module 140 are all connected to the second processor 110 . The second wireless communication module 140 forms a signal connection with the first wireless communication module 70, and the light intensity signals received by the first optical receiver 30 and the second optical receiver 40 can pass through the first wireless communication module 70 and the second wireless communication module 70. The communication module 140 transmits to the external electronic device E, transmits to the second display device 130 through the second processor 110 and displays on the second display device 130 . The setting value or instruction (control signal) input by the second setting unit 120 is also sent to the first wireless communication module 70 by the second wireless communication module 140 through the second processor 110, and then sent to the first processor 50, Instead, the solid state light source emitter 10 is controlled.

In summary, compared with the prior art and products, the present invention has one of the following advantages:

One of the objectives of the present invention is that the light source has a plurality of light-emitting elements that emit light in different wavelength ranges and emit light one by one, without the need for a monochromator in the prior art, so that the volume of the optical analyzer can be greatly reduced. Moreover, the optical analyzer of the present invention is provided with a first optical receiver and a second optical receiver, which can detect the attenuation state of the light intensity of the light emitting element.

One of the objectives of the present invention is through the technical characteristics of the uniform mixing or light splitting element as an optical integrating sphere. Due to the small size of the optical integrating sphere, it can be used to solve the problem of large volume and inconvenient portability caused by the use of optical choppers in the past. , the optical integrating sphere can make the light evenly mixed and exit from the specific first light outlet and second light outlet, and further solve the influence of light intensity caused by the change of the angle of the beam splitter when using the beam splitter in the past.

One of the objectives of the present invention is that the uniform mixing or light splitting element is the technical feature of the light splitter. Because the through holes of the light splitter and their configuration relationship can solve the problem of large volume and inconvenient portability caused by the use of light cutters in the past , part of the light can also pass through the through hole, so as to further solve the influence of the light intensity that may be caused by the change of the angle of the beam splitter when using the beam splitter in the past.

One of the objectives of the present invention is to monitor or dynamically continuously record the current penetration of the fluid to be tested through the first optical receiver that receives the first light and the second optical receiver that receives the detection light that passes through the fluid to be tested. Whether the transmittance and its composition ratio and concentration meet the quality required for normal work, or further calculate the service life, and make preparations for replacing or adjusting the fluid to be tested in advance.

One of the objectives of the present invention is to monitor in real time whether the light intensity of the light source of the solid-state light source transmitter is attenuated through the first optical receiver receiving the first light, and the change amount of light intensity signal attenuation, and further adjust or replace the solid-state light source transmitter. light source.

But what is described above is only a preferred embodiment of the present invention, and should not limit the scope of implementation of the present invention with this, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the new description content, All still belong to the scope covered by the patent of the present invention. In addition, any embodiment or scope of claims of the present invention does not necessarily achieve all the objectives or advantages or features disclosed in the present invention. In addition, the abstract and the title are only used to assist the search of patent documents, and are not used to limit the scope of rights of the present invention. In addition, terms such as "first" and "second" mentioned in this specification or the scope of the patent application are only used to name elements (elements) or to distinguish different embodiments or ranges, and are not used to limit the number of elements. upper or lower limit.

1: light source R1: Optical splitter R2: light cutter 3: Absorption pool 4: First detector 5: Second detector P1: Detection light path P2: Contrasting light paths 6:Accommodating the shell 10: Solid state light source transmitter 11: Substrate 12: Temperature sensor 13:Light-emitting element 20, 20': Uniform mixing or light splitting elements 21: Light entrance 22: The first light exit 23: Second light exit 24: Through hole 30: First optical receiver 40: Second optical receiver 50: First Processor 60: The first display device 61: opening 70:The first wireless communication module 100: Optical analyzer 110: second processor 111: interface 120: the second setting unit 130: Second display device 140: Second wireless communication module 200: liquid conveying parts L1: first ray L2: second ray L3: Detect light O: fluid analyte E: electronic device

Figure 1 is a schematic diagram of a prior art optical analyzer. Fig. 2 is a schematic diagram of an embodiment of the optical analyzer of the present invention. Fig. 3 is a cross-sectional view of the optical analyzer of Fig. 2 . Fig. 4 is a schematic diagram of another embodiment of the optical analyzer of the present invention. Fig. 5 is an emission spectrum diagram of the light-emitting diode of the first embodiment of the solid-state light source emitter of the optical analyzer of the present invention. Fig. 6 is an emission spectrum diagram of the light-emitting diode of the second embodiment of the solid-state light source emitter of the optical analyzer of the present invention. Fig. 7 is an emission spectrum diagram of the light-emitting diode of the third embodiment of the solid-state light source emitter of the optical analyzer of the present invention. FIG. 8 is a schematic diagram of an embodiment of a solid-state light source emitter of the optical analyzer of the present invention. FIG. 9A is a flow chart of a method for calibrating the luminous intensity of a light emitting device by measuring temperature. FIG. 9B is a corresponding graph of relative intensity and junction temperature of the fourth light-emitting diode of the present invention. FIG. 9C is a corresponding graph of forward bias voltage and junction temperature of the fourth light-emitting diode of the present invention. Fig. 10 is a schematic diagram of an embodiment of the optical analysis system of the present invention. Fig. 11 is a system block diagram of an embodiment of the optical analyzer of the present invention. FIG. 12 is a system block diagram of an electronic device connected to the signal of the optical analyzer of the present invention.

10: Solid state light source transmitter

20: Uniform mixing or splitting components

21: Optical splitter

22: Cutter

23: Second light exit

30: First optical receiver

40: Second optical receiver

L1: first ray

L2: second ray

L3: Detect light

100: Optical analyzer

O: fluid analytes

Claims (21)

An optical analyzer comprising: A solid-state light source transmitter (10), which includes a light source, the light source includes a plurality of light-emitting elements (13) each emitting light having at least one light-emitting peak wavelength and at least one wavelength range, and the light-emitting elements (13) are light-emitting Diodes, vertical resonant cavity surface-emitting lasers or laser diodes, and a plurality of the light-emitting elements (13) can respectively present a discontinuous luminescence of a flickering frequency, and the plurality of flickering frequencies can be the same as each other or each other different, or a plurality of the flickering frequencies may be partly the same or partly different; A uniform mixing or light splitting element (20, 20'), the light emitted by the light emitting elements (13) passes through the uniform mixing or light splitting element (20, 20') to form a first light (L1) and a second light (L2), the second light (L2) passes through a fluid analyte (O) and is not absorbed by the fluid analyte (O) to obtain a detection light (L3); a first optical receiver (30), receiving the first light (L1); and a second optical receiver (40), receiving the detection light (L3); Wherein, at least a part of the plurality of peak luminescence wavelengths has a wavelength half maximum width corresponding to the luminescence peak wavelengths greater than 0 nm and less than or equal to 60 nm. The optical analyzer as described in Claim 1, wherein, when the first light (L1) has a standard light intensity, the light intensity of the second light (L2) is equal to the standard light intensity, and the detection light (L3 ) to the standard light intensity ratio is the standard transmittance of the fluid analyte (O), and when the first light (L1) has a working light intensity, the light intensity of the second light (L2) Equal to the working light intensity, the ratio of the detection light (L3) to the working light intensity is one of the working transmittances of the fluid object to be tested (O), the standard light intensity is different from the working light intensity, compare the Whether the standard penetration rate is the same as the working penetration rate, and judge the composition change of the fluid analyte (O) according to the comparison result. The optical analyzer according to claim 1, wherein, when the first light (L1) has a standard light intensity, the first optical receiver (30) receives the first light (L1) and generates a standard light Intensity signal, and when the first light (L1) has an attenuated light intensity, the first optical receiver (30) receives the first light (L1) and generates an attenuated light intensity signal for comparison with the standard light intensity signal According to a change amount between the attenuated light intensity signal, the uniform mixing or light splitting element (20, 20') adjusts the light intensity of the first light (L1) according to the change amount. The optical analyzer as claimed in item 1, wherein the uniform mixing or light splitting element (20) is an optical integrating sphere, and the optical integrating sphere includes a light entrance (21), a first light exit (22) and a first Two light outlets (23), the first optical receiver (30) is aligned with the first light outlet (22), the second optical receiver (40) is aligned with the second light outlet (23), and the light emitting The light emitted by the element (13) enters the optical integrating sphere through the light entrance (21), the first light (L1) exits from the first light exit (22), and the second light (L2) exits from the second light Two light outlets (23) exit. The optical analyzer as described in claim 4, wherein the first light exit (22) and the light entrance (21) are separated by a central angle of 90 degrees relative to the center of the optical integrating sphere, and the second light exit (23 ) and the light entrance (21) are separated by a central angle of 90 degrees relative to the center of the optical integrating sphere, and the first light exit (22) and the second light exit (23) are relative to the sphere of the optical integrating sphere The centers are separated by a central angle of 90 degrees. The optical analyzer as described in claim 1, wherein the uniform mixing or light splitting element (20') is a light splitter plate, the light splitter plate has a through hole (24), and the first optical receiver (30) is arranged on the light splitter board and set opposite to the light-emitting elements (13), part of the light emitted by the light-emitting elements (13) becomes the first light (L1) and is received by the first optical receiver (30), the Another part of the light emitted by the light emitting element (13) passes through the through hole (24) to become the second light (L2). The optical analyzer as described in claim 1, wherein the wavelength ranges of the two light-emitting elements (13) corresponding to the adjacent two light-emitting peak wavelengths partially overlap to form a shorter range than the light-emitting elements (13) The wavelength range of each of them is a wide continuous wavelength range, or the wavelength ranges of the two light-emitting elements (13) corresponding to two adjacent luminous peak wavelengths do not overlap. The optical analyzer as described in Claim 1, wherein a plurality of the light-emitting elements (13) emit light in sequence, and the aforementioned sequential light-emitting means that a plurality of the light-emitting elements (13) at different positions emit light of the same wavelength range The plurality of light-emitting elements (13) do not emit light at the same time; or, the plurality of light-emitting elements (13) partly emit light at the same time. It emits light while emitting light in different wavelength ranges. The optical analyzer as described in claim 1, wherein the solid-state light source transmitter (10) further includes a substrate (11), which measures a certain current bias value of the light-emitting elements (13) when they are working, and through the The PN of the solid-state light source emitter (10) is obtained by converting the constant current bias value of the light-emitting element (13) and the PN junction temperature of the solid-state light source emitter (10) or a corresponding table or figure conversion Junction temperature, and then by the mathematical relationship between the light intensity of the light-emitting elements (13) and the PN junction temperature or the corresponding table or figure, the luminous intensity ratio of the light-emitting elements (13) is obtained, and according to a The judgment result corrects the value of the light intensity emitted by the light emitting elements (13) measured by the first optical receiver (30). The optical analyzer according to claim 1, further comprising a first processor (50) and a first display device (60), the solid-state light source transmitter (10), the first optical receiver (30) And the second optical receiver (40) is connected to the first processor (50), the first processor (50) controls the solid-state light source transmitter (10) to emit the light in sequence, the first optical receiver The light intensity signal received by the device (30) and the second optical receiver (40) is displayed on the first display device (60). The optical analyzer as described in claim 10, further comprising a first wireless communication module (70), which is connected to the first processor (50), the first optical receiver (30) and the second The light intensity signal received by the optical receiver (40) can be transmitted to an external electronic device through the first wireless communication module (70), or receive a control signal from the external electronic device. The optical analyzer according to claim 1, wherein the flickering frequency is between 0.05 times/second and 50000 times/second. The optical analyzer according to claim 12, wherein the time interval for turning on the light-emitting element (13) in the flickering frequency is between 0.00001 second and 10 seconds. The optical analyzer according to claim 13, wherein the time interval for turning off the light-emitting element (13) in the flickering frequency is between 0.00001 second and 10 seconds. The optical analyzer according to claim 1, wherein the difference between two adjacent luminous peak wavelengths is between 1 nm and 80 nm. The optical analyzer according to claim 15, wherein the difference between two adjacent luminescence peak wavelengths is between 5nm and 80nm. The optical analyzer according to claim 16, wherein the wavelength half maximum width corresponding to each of the emission peak wavelengths is between 15nm and 50nm. The optical analyzer according to claim 17, wherein the wavelength half maximum width corresponding to each of the emission peak wavelengths is between 15nm and 40nm. The optical analyzer according to Claim 1, wherein the difference between two adjacent luminous peak wavelengths is greater than or equal to 0.5 nm. The optical analyzer according to claim 19, wherein the difference between two adjacent luminescence peak wavelengths is between 1 nm and 80 nm. An optical analysis system comprising: An optical analyzer (100) according to any one of claims 1 to 20; and A liquid conveying element (200), the fluid analyte (O) is transported in the liquid conveying element (200), the uniform mixing or light splitting element (20, 20') is arranged with the second optical receiver (40) On both sides of the liquid conveying element (200), the second light (L2) passes through the liquid conveying element (200) and forms the detection light (L3) to be received by the second optical receiver (40).

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