JP2003065856A - Optical measuring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical measuring system capable of taking accurately luminescent data at a measuring point by removing a noise entering through an observation optical path in luminescence measurement of the specific measuring point. SOLUTION: This optical measuring system comprises a pluralities of optical measuring parts for condensing luminescence of the measuring point through the observation optical paths and deriving condensed light so that the luminescence of one measuring point is condensed through the observation optical paths having mutually different angles, and a correlator for inputting each luminescent signal acquired from light condensed by each optical measuring part and outputting a coherent luminescent signal by taking coherence of inputted luminescent signals. Hereby, an analyzer inputting the luminescent signal acquired by taking the mutually coherent luminescent signals from the inputted plural luminescent signals by the correlator as a luminescent signal from which a noise from except the measuring point is removed can perform accurate measurement on the measuring point, to thereby facilitate clarification of luminescent phenomenon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical measurement system capable of performing optical measurement of light emission at a specific point, excluding the influence of noise on the observation optical path of an optical system.

[0002]

2. Description of the Related Art Conventionally, light having a specific frequency at a certain measurement point is measured to detect a specific substance or the state of the measurement point. For example, there are OH radicals, CH radicals, C ₂ radicals, and the like as transitional substances that appear uniquely in the combustion region, and these have specific wavelengths of 306.3 nm, 431.5 nm, and 516.52, respectively.
having an emission of nm. Therefore, in order to confirm the combustion state in the combustor of the boiler or the turbine, the luminescence accompanying the combustion reaction at the measurement point is observed, and the luminescence signals at those points are obtained and analyzed to determine the combustion phenomenon that is the luminescence phenomenon at the measurement point It is effective for monitoring the flame holding state of the pilot burner in the center of the combustor, for example.

A conventional example of such an optical measurement system will be described with reference to FIG. (A) is a general fiber
1 shows an optical measurement unit 1 using a lens system. (In the present specification, the “optical measurement unit” refers to a unit that collects light emitted from a measurement point through an observation optical path and guides the condensed light.) In FIG. 4, the optical measurement unit 1 is a measurement point. The light emitted from A is condensed by the convex lens 2, the captured light is guided to the fiber light guide 3 such as a quartz fiber or a glass fiber, and is input to the analyzer 4 through a necessary filter, amplifier, etc. not shown. . In FIG. 4A, the convex lens 2
Is shown as a single lens, but it is not limited to this and may be a lens group.

However, in FIG. 4A, assuming that B is the combustion region including the measurement point A, there is light emission accompanying combustion in the range of B, and the portion of the observation optical path from point A that passes through the region of B ( There is a problem that it is difficult to perform accurate optical measurement of the point A because all the light emission in the hatched portion in the figure) enters as noise.

As a conventional example of the improved optical measurement system, a Cassegrain optical system (Cass) shown in FIG.
egrain Optics). The optical measuring unit 1 ′ of the Cassegrain optical system includes a convex mirror 5 with its back facing the measurement point A, and a convex mirror 5 on the line connecting the measurement point A and the convex mirror 5.
And a concave mirror 6 having an opening 6a in the center.

The light emitted from the measuring point A passes around the convex mirror 5, is reflected by the concave mirror 6, is reflected by the convex mirror 5, passes through the central opening 6a of the concave mirror 6, and is condensed.

This is guided to a fiber light guide portion 3 such as a quartz fiber or a glass fiber, and is inputted to an analyzer 4 through a necessary filter, amplifier, etc. not shown.

Therefore, when the Cassegrain optical system is used, as shown in FIG. 4 (b), the observation optical path from the point A passing through the combustion zone B is limited, and the light emission as noise entering during that period is reduced. It is possible, but it is unavoidable that the light emission other than the measurement point A enters as noise.

[0009]

DISCLOSURE OF THE INVENTION The present invention is an optical measurement capable of accurately extracting emission data of a measurement point, excluding noise that enters in an observation optical path when observing a specific measurement point by the conventional optical measurement system as described above. The challenge is to provide a system.

[0010]

[Means for Solving the Problems] (1) The present invention has been made to solve the above problems, and as a first means thereof, collects light emitted from a measurement point through an observation optical path. A plurality of optical measurement units for deriving the condensed light are provided so as to collect light emitted from one measurement point through observation optical paths at mutually different angles, and each of the optical measurement units obtains from the collected light. There is provided an optical measurement system characterized by comprising a correlator that inputs each light emission signal, takes coherence of the input light emission signal, and outputs a coherent light emission signal.

According to the above-mentioned first means, the light emission signal of the light collected by capturing the light emission of the measurement point in each optical measuring section is not detected by the noise due to the light entering in the observation optical path. Although it has a waveform different from that of the light emission, the obtained light emission signal is measured by removing the noise from other than the measurement point by taking coherent light emission signals from multiple light emission signals in the input correlator. It can be used as a light emission signal according to light emission at a point.

(2) As a second means, in the optical measurement system of the first means, at least one of the plurality of optical measurement units has a convex lens facing the measurement point and light collected by the convex lens. An optical measurement system is provided which is a fiber lens system including a fiber light guide unit that guides the light.

According to the second means, the operation of the first means can be achieved, and the optical measurement system can be simply constructed.

(3) As a third means, in the optical measurement system of the first means, at least one of the plurality of optical measurement units has a convex mirror with its back facing the measurement point, and the same measurement. A Cassegrain optical system that includes a concave mirror disposed on a line connecting the point and the convex mirror and facing the convex mirror and having an opening in the center, and a fiber light guide unit that guides light condensed through the opening. A characteristic optical measurement system is provided.

According to the third means, the operation of the first means can be achieved, and the optical measurement system can measure with higher accuracy.

(4) As the fourth means, in the optical measurement system according to any one of the first means to the third means,
A plurality of sets of two optical measurement units are formed for the one measurement point, a filter adapted to the emission of a different substance is interposed for each set, and the correlator is provided for each set. Provided is an optical measurement system, which is characterized by outputting a light emission signal of a substance.

According to the fourth means, in addition to the operation of any one of the first means to the third means, a plurality of sets of optical measuring units are used to emit light at the same measurement point, and simultaneously to emit light from different substances. It is possible to measure without noise,
It is possible to perform accurate measurement regarding the light emission of a plurality of substances.

(5) As a fifth means, in the optical measuring system of the fourth means, one of the two optical measuring sections of each set is a common optical measuring section. Provide a measurement system.

According to the fifth means, in addition to the function of the fourth means, when configuring an optical measurement system with a plurality of sets of optical measurement units, one optical measurement unit can be shared by all the sets, so that few optical measurement The number of parts makes the optical measurement system simple.

(6) As a sixth means, in the optical measuring system according to any one of the first means to the third means, the optical measuring section is replaced with a plurality of measuring points instead of the one measuring point. Is provided so as to collect light from each of the same measurement points via observation optical paths at mutually different angles, and the coherence of the light emission signal input by the correlator is taken at each of the measurement points to output a coherent light emission signal. An optical measurement system characterized by the above.

According to the sixth means, in addition to the effect of the first means, a plurality of sets of optical measurement units are used to simultaneously perform noise-free measurement on light emission at a plurality of different measurement points in the measurement area. Therefore, it is possible to accurately capture the light emission state at a plurality of measurement points.

(7) As a seventh means, in the optical measuring system according to the sixth means, one of the plurality of optical measuring sections has all of the plurality of measuring points in its observation optical path. It is assumed that, for each of the measurement points, another optical measurement section of the plurality of optical measurement sections collects light emission at the same measurement point via an observation optical path at an angle different from the observation optical path of the one optical measurement section. An optical measurement system characterized by the above.

According to the seventh means, in addition to the function of the sixth means, when forming an optical measurement system with a plurality of sets of optical measurement units, the observation optical path of one optical measurement unit is made by parallel rays. Since it can be shared by all the measurement points, the optical measurement system can be simply configured with a small number of optical measurement units.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION An optical measurement system according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 shows the basic configuration of the optical measurement system of this embodiment.

In FIG. 1, 10 is a first optical measuring unit, 2
Reference numeral 0 denotes a second optical measuring unit, which is composed of an optical measuring unit 1 using a fiber-lens system or an optical measuring unit 1'of a Cassegrain optical system shown in the conventional example.

In the present embodiment, B is a combustion region which is a measurement region, and two optical measurement units, that is, the first optical measurement unit 10 and the second optical measurement unit, for one measurement point A in the combustion region B. The optical measurement unit 20 is provided as a set (1 pair) of optical measurement units with different angles of observation optical paths, and constitutes an optical measurement system.

In order to measure the light emission a at the measurement point A, the light b collected and collected by the first optical measurement unit 10 is a fiber light guide unit 13 such as a quartz fiber or a glass fiber.
And is input to the amplifier 18 (via the filter 17 matched to the emission of the substance when the emission of the specific substance is to be measured).
The light emission signal b ′ converted into an electric signal and amplified by the correlator 40
Is input to.

The light c collected and collected by the second optical measuring section 20 is guided by the fiber light guide section 23 such as a quartz fiber or a glass fiber, and (when measuring the emission of a specific substance, Is a filter 27 adapted to the emission of the same specific substance as set in the first optical measurement unit.
Via the) to the amplifier 28 and the amplifier 2
The light emission signal c ′ converted into an electric signal and amplified by 8 is the correlator 4
Input to 0.

The correlator 40 includes the first and second optical measuring units 1
Coherence (c) of the emission signals b ′ and c ′ from 0 and 20
The coherent light emission signal a ′ is obtained by taking the difference (attenuation), and this is input to the analyzer 4.

In the present specification, "obtaining coherent light emission signal by taking coherence" is similar to the time waveform of a reference light emission signal and the time waveform of a target light emission signal of a plurality of light emission signals. The property is to take a so-called coherence function, and a value close to 1 is used as a coherent light emission signal.

According to the optical measuring system of the present embodiment as described above, the light emission a at the measuring point A is measured by the first optical measuring unit 1.
The light b collected and collected at 0 is the observation optical path 11 in the combustion region B.
The light coming in (hatched portion in the figure) has a waveform different from that of the light emission a.

Similarly, the light c obtained by collecting the light emission a at the measurement point A by the second optical measuring section 20 and converging it enters through the observation optical path 21 (hatched portion in the figure) in the combustion zone B. Due to the light, it has a waveform different from that of the light emission a.

However, the respective lights b and c are transmitted to the amplifier 1
After being amplified by 8 and 28 to become emission signals b ′ and c ′,
Light emission signals a ′ that are coherent with each other in the correlator 40
By taking the measurement point A entered in the observation optical path 11 above.
By utilizing the disagreement between the component of the light emission signal due to the incident light from other than the component of the light emission signal due to the incident light from other than the measurement point A entered in the observation optical path 21, these can be distinguished and removed.

As a result, the obtained coherent light emission signal a'can be used as a light emission signal according to the light emission a at the measurement point A, excluding the noise from other than the measurement point A, and the light emission signal a '. With respect to the measurement point A, the analyzer 4 that has input is able to capture the combustion phenomenon much more accurately than the conventional example, and it is possible to easily understand the complicated combustion phenomenon.

In the present embodiment, the first optical measuring unit 10 and the second optical measuring unit 20 are sufficiently effective even by the optical measuring unit 1 of the fiber lens system shown in the conventional example, and the system is obtained. Although it is possible to reduce the cost of configuring, the use of the optical measuring unit 1 ′ of the Cassegrain optical system enables higher-precision measurement.

Next, the second embodiment of the present invention will be described with reference to FIG.
The optical measurement system according to the embodiment will be described. The present embodiment is an applied mode of the first embodiment, and the similar parts are omitted in the drawings, and FIG. 2 shows a main part of the configuration of the optical measurement system of the present embodiment.

In FIG. 2, a third optical measuring unit 30 for observing the same measuring point A is provided in the system of FIG. The optical measurement system including two sets (2 pairs) of optical measurement units is configured by the combination of the optical measurement unit 10 and the second optical measurement unit 20, and the combination of the first optical measurement unit 10 and the third optical measurement unit 30. Has been done.

The present embodiment shows the case where the emission a at the same measurement point A in the combustion zone B is measured at the same time for the emission of different substances X and Y, and the first optical measurement unit 10 collects. The emitted light b is guided by a fiber light guide 13 such as a quartz fiber or a glass fiber, and is divided into two by a mirror or the like (not shown) to match the emission of the substance X with the filter 17x and the emission of the substance Y. The light emission signals bx ′ and by ′, which have been converted into electric signals bx and by, are input to the amplifier 18, and converted into electric signals by the amplifier 18, and amplified by the correlator 40x and the correlator 40y, respectively. It is input.

The light c collected by the second optical measuring unit 20 by capturing the emitted light a is guided by the same fiber light guide unit 23, and becomes the light cx via the filter 27x adapted to the emission of the substance X. , Input to amplifier 28 and amplifier 2
The light emission signal cx ′ converted into an electric signal and amplified in 8 is input to the correlator 40x.

The correlator 40x obtains the light emission signal ax 'by taking the coherence of the light emission signals bx' and cx 'from the first and second optical measurement units 10 and 20, and the above-mentioned first embodiment. As described in the first embodiment, the obtained coherent light emission signal ax ′ is obtained by removing the noise due to the light incident from other than the measurement point A.
It can be used as a light emission signal of the substance X according to the light emission a in the above. By inputting the light emission signal ax ′ to the analyzer, highly accurate measurement of light emission of the substance X at the point A can be performed.

On the other hand, the light d collected by the third optical measuring unit 30 by capturing the emitted light a is guided by the same fiber light guide unit 33, and is transmitted through the filter 37y matched with the emission of the substance Y. The light emission signal dy becomes dy, is input to the amplifier 38, is converted into an electric signal by the amplifier 38, and is amplified, and is input to the correlator 40y.

The correlator 40y takes the coherence of the light emission signals by 'and dy' from the first and third optical measuring units 10 and 30 to obtain the light emission signal ay '. As described in the first embodiment, the obtained coherent light emission signal ay ′ is obtained by removing noise from other than the measurement point A, and can be used as the light emission signal of the substance Y according to the light emission a at the measurement point A. Will be things. By inputting the emission signal ay ′ to the analyzer, A
The light emission of the substance Y at the point is measured with high accuracy.

That is, according to the optical measurement system of the present embodiment, the measurement is performed by using two sets of optical measurement units with respect to the light emission a at the same measurement point A and simultaneously removing the noise from the light emission of the different substances X and Y. Is something you can do,
Regarding the measurement point A, it is possible to capture the combustion phenomenon much more accurately than in the conventional example, and by measuring the light emission of two kinds of substances at the same time, it is possible to easily clarify a more complicated combustion phenomenon. .

Further, in constructing an optical measurement system with two sets of optical measurement units, one set of optical measurement units can be shared by two sets, so that only three optical measurement units are required, and the optical measurement system can be simply constructed.

The optical measuring system of the present embodiment measures the emission of two substances at one measuring point by using two sets of optical measuring units, but an optical measuring unit should be added in the same manner. Can measure the luminescence of n kinds of substances at one measurement point by using n sets of optical measurement units, and the optical measurement system including the n sets of optical measurement units has (n + 1) optical measurement units. Can be configured with.

Therefore, the number of optical measuring units is small, the optical measuring system can be simply constructed, and the space and cost can be reduced.

Also in the present embodiment, the optical measuring section 1 of the fiber / lens system shown in the above-mentioned conventional example is sufficiently effective for each optical measuring section, and the cost for constructing the system can be reduced. However, when the optical measuring unit 1 ′ of the Cassegrain optical system is used, higher precision measurement becomes possible.

In FIG. 2, correlators 40x and 40
Although y and y are shown separately, they may be configured as an integrated correlator including the functions of both correlators instead of being configured separately.

Further, an optical measuring system according to the third embodiment of the present invention will be described with reference to FIG. The present embodiment is an applied aspect of the first embodiment, and the similar parts are omitted in the drawing, and FIG. 3 shows a main part of the configuration of the optical measurement system of the present embodiment.

In FIG. 3, reference numeral 110 denotes a first optical measuring section which makes the observation light path 111 a parallel light beam and puts two measurement points A1 and A2 in the combustion zone B into the observation light path 111. In addition to the first optical measurement unit 110, the second optical measurement unit 120 that observes the measurement point A1 and the third optical measurement unit 130 that observes the measurement point A2 are the first optical measurement unit 110.
The observation optical path 111 and the observation optical path are provided at different angles, and the first optical measurement unit 110 and the second optical measurement unit 12 are provided.
The combination of 0 and the first optical measurement unit 110 and the third optical measurement unit 130 constitutes an optical measurement system including two sets (2 pairs) of optical measurement units.

The present embodiment shows a case where the light emission a1 and a2 of the two measurement points A1 and A2 in the combustion zone B are measured simultaneously, and the first optical measurement unit 110 measures the measurement point A1. The light b, which is obtained by collecting and condensing the light emission a1 and the light emission a2 at the measurement point A2, is guided by the fiber light guide unit 113 such as a quartz fiber or a glass fiber, and (when measuring the light emission of a specific substance, Amplifier 11 via a filter 117 adapted to the emission of the substance)
The light-emission signal b ′ that has been input to the amplifier 8, converted into an electric signal by the amplifier 118 and amplified is input to the correlator 140.

The light c1 collected and collected by the second optical measuring unit 120 at the light emission a1 at the measuring point A1 is guided by the similar fiber light guiding unit 123 (the same as that set in the first optical measuring unit). When the emission of a specific substance is to be measured, the emission signal c1 'which is input to the amplifier 128 via the filter 127 matched to the emission of the substance, is converted into an electric signal by the amplifier 128, and is amplified is a correlator. 14
Input to 0.

The correlator 140 takes the coherence of the light emission signals b ′ and c1 ′ from the first and second optical measurement units 110 and 120 to obtain the light emission signal a1 ′. As described in the first embodiment, the obtained coherent light emission signal a1 ′ is obtained by removing noise due to light incident from other than the measurement point A1, and can be used as a light emission signal according to the light emission a1 at the measurement point A1. Will be things. By inputting the light emission signal a1 ′ to the analyzer, highly accurate measurement of the light emission a1 at the point A1 is performed.

On the other hand, the third optical measuring section 130 measures the measurement point A.
The light c2 obtained by capturing and condensing the second emitted light a2 is guided by the similar fiber light guide 133, and (when measuring the emitted light of the same specific substance as set in the first optical measurement unit, It is input to the amplifier 138 via the filter 137 matched to the emission of the substance, and the amplifier 1
The light emission signal c2 ′ which has been converted into an electric signal and amplified at 38 is input to the correlator 140.

The correlator 140 takes the coherence of the light emission signals b ′ and c2 ′ from the first and third optical measuring units 110 and 130 to obtain the light emission signal a2 ′. As described in the first embodiment, the obtained coherent light emission signal a2 ′ is obtained by removing noise due to light incident from other than the measurement point A2, and can be used as a light emission signal according to the light emission a2 at the measurement point A2. Will be things. By inputting the light emission signal a2 ′ to the analyzer, highly accurate measurement of the light emission a2 at the point A2 is performed.

That is, according to the optical measuring system of the present embodiment, two sets of optical measuring units are used for the light emission a1 and a2 of two different measuring points A1 and A2 in the combustion zone B.
It is possible to perform measurement with noise removed at the same time, and it is possible to capture the light emission state at two measurement points A1 and A2 much more accurately than in the conventional example, and simultaneously measure light emission at two locations. By doing so, it is possible to facilitate the elucidation of more complicated combustion phenomena.

Further, in constructing an optical measurement system with two sets of optical measurement units, since the observation optical path of one optical measurement unit can be shared by making parallel light rays, it is possible to use three optical measurement units. The optical measurement system can be simply constructed.

The optical measuring system of the present embodiment measures the light emission at two different measurement points by using two sets (2 pairs) of optical measuring units, but an optical measuring unit is additionally installed. As a result, it is possible to measure the light emission at n measurement points using the n sets of optical measurement units.

When n measurement points are linearly arranged, the optical measurement system including the n sets of optical measurement sections has one optical measurement section that uses parallel rays as an observation optical path and n.
It can be configured with individual optical measuring units.

Therefore, the number of optical measuring units is small, the optical measuring system can be simply constructed, and the space and cost can be reduced.

Further, in the present embodiment, each optical measuring section can sufficiently obtain the effect even by the optical measuring section 1 of the fiber lens system shown in the above-mentioned conventional example, and the cost for constructing the system can be reduced. , The optical measurement unit 1 ′ of the Cassegrain optical system can be used as each of the optical measurement units other than the first optical measurement unit that uses the parallel light beam as the observation optical path, and in that case, more accurate measurement is possible. Become. In addition,
The fiber-lens system optical measuring unit 1 is suitable as one optical measuring unit using parallel rays as the observation optical path.

The embodiment of the present invention has been described above.
It is needless to say that the present invention is not limited to the above-described embodiment, and various modifications may be made to the specific configuration within the scope of the present invention.

For example, in both the above-mentioned conventional example and the embodiment,
The combustion area of the boiler or turbine is taken as the measurement area, the optical measurement of the measurement points in the area is performed, and the optical measurement system for clarifying the combustion phenomenon as one light emission phenomenon has been described as an example, but the present invention is not limited to this. However, it can be implemented as an optical measurement system for performing optical measurement of a measurement point in a general measurement range and clarifying various light emission phenomena.

[0064]

(1) According to the invention of claim 1, the optical measuring system is provided with an optical measuring section which collects the light emitted from the measuring point through the observation optical path and derives the condensed light. Is provided so as to collect light emitted through the observation optical paths at different angles from each other, and the respective light emission signals obtained from the light collected by the respective optical measurement units are input, and the coherence of the input light emission signal is determined. Since it is configured to have a correlator that outputs a coherent light emission signal, the light emission signal of the light collected by capturing the light emission at the measurement point in each optical measurement unit is the light that enters the observation light path. Due to noise due to noise, a waveform different from the light emission at the measurement point is exhibited, but the obtained light emission signal is obtained by taking coherent light emission signals from a plurality of light emission signals in the input correlator. From other than Excluding noise, it becomes what can be used as a light-emitting signal according emitting at the measurement point,
The analyzer that inputs this can perform accurate measurement at the measurement point, and can easily clarify the light emission phenomenon.

(2) According to the invention of claim 2, claim 1
In the optical measurement system according to the item 1, at least one of the plurality of optical measurement units is a fiber lens system that includes a convex lens facing the measurement point and a fiber light guide unit that guides light condensed by the convex lens. With this configuration, the effect of the invention of claim 1 can be obtained, and the optical measurement system can be configured easily and its cost can be reduced.

(3) According to the invention of claim 3, claim 1
In the optical measurement system according to claim 1, at least one of the plurality of optical measurement units is disposed on a convex mirror with its back facing the measurement point and a line connecting the measurement point and the convex mirror, and faces the same convex mirror. Since it is configured to be a Cassegrain optical system that includes a concave mirror having an opening, and a fiber light guide unit that guides light that has passed through the opening and condensed light,
In addition to the effect of the invention of claim 1, the optical measurement system can be made more highly accurate.

(4) According to the invention of claim 4, claim 1
The optical measurement system according to any one of claims 1 to 3, wherein a plurality of sets of the two optical measurement units are formed for the one measurement point, and each set has a filter adapted to light emission of a different substance. In addition to the effect of the invention of any one of claims 1 to 3, since the correlator is interposed, and the correlator outputs the emission signal of the substance for each of the groups, a plurality of sets of optical measurement are provided. By using the unit, it is possible to measure the emission of different substances at the same time with noise removed, and it is possible to perform accurate measurement of the emission of multiple substances. The phenomenon can be easily clarified.

(5) According to the invention of claim 5, claim 4
In the optical measurement system according to claim 1, since one of the two optical measurement units of each set is configured as a common single optical measurement unit, in addition to the effect of the invention of claim 4, a plurality of sets of optical measurement units are provided. When configuring the optical measurement system with the measurement unit, one optical measurement unit can be shared by all the sets, so that the number of optical measurement units is small and the optical measurement system can be configured simply, and the space and cost can be reduced.

(6) According to the invention of claim 6, claim 1
The optical measurement system according to any one of claims 1 to 3, wherein the optical measurement unit replaces the one measurement point with light emitted from a plurality of measurement points via observation optical paths at different angles for each measurement point. 4. A plurality of light-collecting units are provided to collect light, and the coherence of the light-emission signal input to the correlator is taken at each of the measurement points to output a coherent light-emission signal. In addition to the effects of the invention, it is possible to simultaneously perform noise-free measurement on light emission at a plurality of different measurement points within a measurement area by using a plurality of sets of optical measurement units, and accurately emit light at a plurality of measurement points. It is possible to grasp the state and facilitate the elucidation of more complicated light emission phenomenon.

(7) According to the invention of claim 7, claim 6
2. In the optical measurement system according to claim 1, one of the plurality of optical measurement units has all of the plurality of measurement points in its observation optical path, and the plurality of optical measurement units is provided for each of the measurement points. Another optical measuring unit of the above is configured to collect the light emission of the same measurement point through the observation optical path of an angle different from the observation optical path of the one optical measuring unit, and thus the effect of the invention of claim 6 is obtained. In addition, when configuring an optical measurement system with multiple sets of optical measurement units, the observation optical path of one optical measurement unit can be shared by all the measurement points by using parallel rays, so the number of optical measurement units is small. The measurement system can be configured simply, saving space and cost.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an optical measurement system according to a first embodiment of the present invention, showing a basic configuration of the optical measurement system of the present embodiment.

FIG. 2 is an explanatory diagram of an optical measurement system according to a second embodiment of the present invention, showing a main part of the configuration of the optical measurement system of the present embodiment.

FIG. 3 is an explanatory diagram of an optical measurement system according to a third embodiment of the present invention, showing a main part of the configuration of the optical measurement system of the present embodiment.

FIG. 4 is an explanatory diagram of a conventional example of an optical measurement system,
(A) shows the optical measurement part by a general fiber lens system, (b) shows the optical measurement part by the Cassegrain optical system as an improved prior art example.

[Explanation of symbols]

4 Analyzer 10 First optical measurement unit 11 Observation optical path 13 Fiber light guide 17, 17x, 17y filters 18 amplifier 20 Second optical measurement unit 21 Observation optical path 23 Fiber light guide 27, 27x filter 28 amplifier 30 Third optical measuring unit 33 Fiber light guide 37y filter 38 amplifier 40, 40x, 40y correlators 110 First Optical Measuring Unit 111 Observation optical path 117 Filter 118 amplifier 120 Second optical measurement unit 127 filters 128 amplifier 130 Third optical measurement unit 137 Filter 138 Amplifier 140 correlator

Claims (7)

[Claims] 1. An optical measuring unit that collects light emitted from a measurement point through an observation optical path and guides the condensed light so that light emitted from one measurement point is collected through observation optical paths at different angles. A plurality of correlators are provided, each of which inputs each light emission signal obtained from the light collected by the optical measurement unit, takes coherence of the input light emission signal, and outputs a coherent light emission signal. An optical measurement system characterized by. 2. The optical measurement system according to claim 1, wherein at least one of the plurality of optical measurement units includes a convex lens facing the measurement point, and a fiber light guide unit that guides light collected by the convex lens. An optical measurement system characterized by being a fiber / lens system equipped with. 3. The optical measurement system according to claim 1, wherein at least one of the plurality of optical measurement units is on a convex mirror with its back facing the measurement point, and on a line connecting the measurement point and the same convex mirror. An optical measurement system comprising a concave mirror having a concave mirror having a central opening and facing the convex mirror, and a fiber light guide unit for guiding light condensed through the opening. 4. The optical measurement system according to claim 1, wherein a plurality of sets of two optical measurement units are formed for the one measurement point, and each set is different. An optical measurement system, wherein a filter adapted to the emission of a substance is provided, and the correlator outputs an emission signal of the substance for each of the groups. 5. The optical measurement system according to claim 4, wherein one of the two optical measurement units of each set serves as a common optical measurement unit. 6. The optical measuring system according to claim 1, wherein the optical measuring unit replaces the one measuring point with light emitted from a plurality of measuring points for each measuring point. An optical measurement system comprising a plurality of light sources that collect light through observation optical paths at different angles, and outputs coherent light emission signals by taking coherence of light emission signals input by the correlator at each of the measurement points. 7. The optical measurement system according to claim 6, wherein one of the plurality of optical measurement units has all of the plurality of measurement points in its observation optical path. For each of the plurality of optical measurement units, another optical measurement unit collects light emission at the same measurement point through an observation light path at an angle different from the observation light path of the one optical measurement unit. Measuring system.