WO2003036279A1 - Systeme micro-chimique et procede spectroscopique de conversion photothermique - Google Patents
Systeme micro-chimique et procede spectroscopique de conversion photothermique Download PDFInfo
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- WO2003036279A1 WO2003036279A1 PCT/JP2002/009464 JP0209464W WO03036279A1 WO 2003036279 A1 WO2003036279 A1 WO 2003036279A1 JP 0209464 W JP0209464 W JP 0209464W WO 03036279 A1 WO03036279 A1 WO 03036279A1
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- Prior art keywords
- light
- lens
- excitation light
- detection light
- detection
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- 239000000126 substance Substances 0.000 title claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 title claims description 36
- 238000004611 spectroscopical analysis Methods 0.000 title claims description 18
- 239000013307 optical fiber Substances 0.000 claims abstract description 56
- 238000009826 distribution Methods 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims description 116
- 230000005284 excitation Effects 0.000 claims description 110
- 230000003287 optical effect Effects 0.000 claims description 34
- 239000000835 fiber Substances 0.000 claims description 15
- 230000004075 alteration Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000004458 analytical method Methods 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 14
- 230000035945 sensitivity Effects 0.000 abstract description 9
- 241000219739 Lens Species 0.000 description 139
- 239000012488 sample solution Substances 0.000 description 24
- 239000011521 glass Substances 0.000 description 16
- 239000000523 sample Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000000926 separation method Methods 0.000 description 7
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- 230000015572 biosynthetic process Effects 0.000 description 4
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- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
- 239000005388 borosilicate glass Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000001962 electrophoresis Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000012472 biological sample Substances 0.000 description 1
- 238000006193 diazotization reaction Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 150000007523 nucleic acids Chemical class 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000011896 sensitive detection Methods 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- -1 thallium ions Chemical class 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/171—Systems in which incident light is modified in accordance with the properties of the material investigated with calorimetric detection, e.g. with thermal lens detection
Definitions
- the present invention relates to a micro-mouth chemical system and a photothermal conversion spectroscopic analysis method.
- microchemical system performs mixing, reaction, separation, extraction, detection, etc. of a sample solution (liquid containing a sample) in a fine channel formed in a small glass substrate or the like.
- reactions performed in this microchemical system include a diazotization reaction, a nitration reaction, and an antigen-antibody reaction.
- extraction and separation include solvent extraction, electrophoretic separation, and column separation.
- a microchemical system may use only a single function, such as for separation only, or a combination of multiple functions.
- This electrophoresis apparatus includes a plate-like member with a flow path composed of two glass substrates bonded to each other. Since this member is plate-shaped, it can be used as a glass cabriolet tube with a circular or square cross section. It is harder to break and easier to handle.
- Figure 3 is a diagram showing the principle of a thermal lens.
- the magnitude of the thermal lens effect that is, the power of the concave lens is proportional to the light absorption of the sample solution.
- the refractive index increases in proportion to the temperature, the change in the refractive index is reversed, so that a thermal lens effect that has the same effect as a convex lens is generated.
- photothermal conversion spectroscopy is used to observe the change in the refractive index of a sample solution caused by the diffusion of heat in the sample solution, it is suitable for detecting the concentration of an extremely small sample. I have.
- a plate member with a flow path is disposed below an objective lens of a microscope, and excitation light of a predetermined wavelength output from an excitation light source enters the microscope.
- This excitation light is focused and irradiated on the sample solution in the flow path of the plate member with the flow path by the objective lens of the microscope.
- the focal position of the focused excitation light is located in the sample solution, and a thermal lens is formed around this focal position.
- the detection light source outputs detection light having a wavelength different from that of the excitation light and enters the microscope.
- the detection light emitted through the microscope is focused and irradiated on the thermal lens formed in the sample solution by the excitation light, passes through the sample solution, and diverges (when the thermal lens has the effect of a concave lens).
- light is condensed (when the thermal lens has the effect of a convex lens).
- the light diverged or condensed from the sample solution and emitted serves as signal light.
- This signal light is received by the detector after passing through both the condenser lens and the filter or only the filter, and is detected.
- the intensity of the detected signal light depends on the refractive index of the thermal lens formed in the sample solution.
- the detection light may have the same wavelength as the excitation light, and the excitation light may also serve as the detection light.
- the thermal lens is formed at the focal position of the excitation light, and the change in the refractive index of the formed thermal lens is different from that of the excitation light. It is detected by detection light of the same wavelength or a different wavelength.
- the photothermal conversion spectrometer described above is bulky and lacks portability because the light source, the optical system of the measurement unit and the detection unit (photoelectric conversion unit) and the like are complicatedly configured. For this reason, there is a problem that the place where the photothermal conversion spectrometer is installed and the operation of the device are limited, and further, there is a problem that the work efficiency of the user is poor.
- the photothermal conversion spectrometer guides the excitation light and the detection light as spatial light to the sample solution, each component of the optical system such as the light source, mirror, and lens may move during the measurement. This requires a solid surface plate to secure them.
- FIG. 4A and 4B are diagrams showing the position of the formation of the thermal lens and the focal position of the detection light in the traveling direction of the excitation light, and FIG. 4A shows the case where the objective lens has chromatic aberration. 4B shows the case where the objective lens has no chromatic aberration.
- the thermal lens 13 1 is formed at the focal position 13 2 of the excitation light, and the focal position 13 2 Since the focal position 133 of the detection light is formed at a position shifted by ⁇ L, a change in the refractive index of the thermal lens 131 can be detected as a change in the focal length of the detection light.
- the focal position 13 3 of the detection light is the thermal lens 13 3 formed at the focal position 13 2 of the excitation light. It almost matches the position of 1. For this reason, since the detection light does not undergo refraction by the thermal lens 131, a change in the refractive index of the thermal lens 131 cannot be detected.
- the focus position 133 of the detection light is a thermal lens formed at the focus position of the excitation light. It almost coincides with the position of 13 1 (Fig. 4B). Therefore, a change in the refractive index of the thermal lens 13 1 cannot be detected. This Therefore, the position of the sample solution on which the thermal lens 13 1 is formed is shifted from the focal position 13 3 of the detection light as shown in FIG. 5A or FIG. As shown in Fig. 6, by using a lens (not shown) to slightly diverge or condense the detection light and make it incident on the objective lens 130, the focus position 133 of the detection light is heated. The lens must be displaced from the lens 13 1, and the sensitivity of the measurement may be sacrificed, and there is a problem that the user's working efficiency is poor.
- An object of the present invention is to provide a microchemical system capable of performing measurement with high sensitivity, and a photothermal conversion spectroscopy method to be performed by the microchemical system.
- An object of the present invention is to provide a small-sized microchemical system that can improve the performance. Disclosure of the invention
- an excitation light source that outputs excitation light
- a detection light source that outputs detection light
- the excitation light and the detection light are combined.
- An irradiating lens for irradiating the sample with the excitation light and the detection light guided by the guidance optics; and an illumination lens generated by the sample irradiated with the excitation light.
- a microchemical system including: a detection unit that detects the detection light transmitted through the thermal lens; and an analysis unit that analyzes a sample based on the detected detection light.
- a first light introducing optical fiber for introducing excitation light into the guiding optical system; and a second introducing light for introducing detection light emitted from the detection light source into the guiding optical system.
- Optical fiber and the guidance A two-wavelength multiplexing element that is disposed in a scientific system, multiplexes the excitation light and the detection light introduced by the first and second introduction light fibers, and Guidance light for guiding excitation light and detection light to the illumination lens
- a microchemical system provided with a light guiding optical fiber is provided.
- the two-wavelength multiplexing device has a multilayer film that reflects or transmits light according to the wavelength of light, and the multilayer film transmits the reflected light and transmits the light. It is preferable that the wavelength of the light at the boundary with the excitation light is between the wavelength of the excitation light and the wavelength of the detection light.
- the two-wavelength multiplexing element includes a dielectric multilayer film filter in which two gradient index rod lenses are connected in series, and the multilayer film is made of a dielectric on a connection surface. It is preferable that the figure is formed. In the first embodiment of the present invention, it is preferable that the dielectric multilayer filter is formed on a surface of the refractive index distribution type lens.
- the guide light fiber propagates the excitation light and the detection light in a single mode.
- the irradiation lens is fixed to an end of the guide light fiber from which the excitation light and the detection light are emitted.
- the frequency of the detection light is different from the frequency of the excitation light, and the irradiation lens has chromatic aberration.
- the irradiation lens is preferably a refractive index distribution type lens.
- the gradient index lens is a cylindrical lens.
- a sample is irradiated with excitation light and detection light via an irradiation lens, and heat generated by the sample irradiated with the excitation light is emitted. Detects the detection light transmitted through the lens and In the photothermal conversion spectroscopy method for analyzing a sample, the excitation light and the detection light are each converted into a two-wavelength multiplexing element that multiplexes two types of light having different wavelengths through a first and a second input optical fiber.
- a photothermal conversion spectroscopy method in which the excitation light and the detection light that have been introduced and multiplexed by the two-wavelength multiplexing element are guided to the irradiation lens in a single mode by a guide light fiber.
- the two-wavelength multiplexing element is configured such that the excitation light is generated by a dielectric multilayer filter formed between two refractive index distribution type lenses connected in series. It is preferable that one of the light and the detection light is reflected and the other is transmitted and multiplexed.
- FIG. 1 is a diagram showing a schematic configuration of a microchemical system according to a first embodiment of the present invention.
- FIG. 2 is a diagram illustrating a schematic configuration of a microchemical system according to a second embodiment of the present invention.
- Figure 3 is a diagram showing the principle of a thermal lens.
- FIG. 4A and 4B are diagrams showing the formation position of the thermal lens and the focus position of the detection light in the traveling direction of the excitation light, and FIG. 4A shows the case where the objective lens has chromatic aberration. Indicates the case where the objective lens has no chromatic aberration.
- FIGS. 5A and 5B are diagrams showing the formation position of the thermal lens and the focal position of the detection light in the traveling direction of the excitation light
- FIG. 5A shows that the thermal lens is closer to the objective lens than the focal position of the detection light
- FIG. 5B shows a case where the thermal lens is formed at a position farther from the objective lens than the focal position of the detection light
- Fig. 6 is a diagram showing a method for detecting a change in the refractive index of a thermal lens in a conventional photothermal conversion analyzer. A concave lens is inserted in the middle of the optical path to make the detection light divergent light, and the focal length of the excitation light The focus position is located farther than This is the case where BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a diagram showing a schematic configuration of a microchemical system according to a first embodiment of the present invention.
- a microchemical system 1 includes an optical fiber unit 10 (hereinafter, an optical fiber unit 10) having a built-in lens.
- the optical fiber unit 10 has a gradient index rod lens 102 as an objective lens at the front end side (the lower side in the drawing) of the tube 104.
- an optical fiber 101 that propagates the excitation light and the detection light in a single mode from the rear end side (the upper side in the drawing) is inserted.
- the input end of the optical fin 101 is connected to one end of a gradient index lens 102.
- the optical fiber 10 is further provided with a refractive index distributed type lens 102 on the one end side of the refractive index distributed type lens 102 in the tube 104.
- a ferrule 103 having the same outer diameter as the outer diameter is incorporated in the ferrule 103.
- the outer diameter of the optical fiber 101 is determined by changing the outer diameter of the refractive index rod lens 102.
- the optical fiber 101 is mounted so as to penetrate through the ferrule 103.
- the optical fiber 101 is mounted so as to penetrate the ferrule 103. It is fixed by a ferrule 103, and the gradient index rod lens 102 and the ferrule 103 are fixed in a tube 104.
- an optical fiber is used.
- the optical fiber unit 1 may be in close contact with the refractive index type land lens 102 and may have a gap. 0 indicates that the emitted light is perpendicularly incident on the plate-like member with flow path 20 described later. Is fixed by a jig 30 at the position where the light beam travels.
- the refractive index distribution rod lens 102 is a columnar transparent lens whose refractive index continuously changes in the radial direction from the center line extending in the longitudinal direction.
- the refractive index n (r) at a position at a distance of r in the radial direction from the center line position is represented by n Q as the refractive index at the center line position and g as the square distribution constant.
- n (r) n 0 I 1 one (2/2) ⁇ r 2
- the refractive index distributed lens 102 has its total length z. Where 0 ⁇ z.
- both end faces are flat but have the same image forming properties as a normal convex lens, and the parallel incident light focuses from the exit end.
- Such a gradient index rod lens 102 is manufactured, for example, by the following method.
- the glass port is treated in an ion-exchange medium such as nitric acid-reamed salt to remove the thallium ions in the glass.
- an ion-exchange medium such as nitric acid-reamed salt to remove the thallium ions in the glass.
- the ion exchange between the sodium ion and the potassium ion in the ion exchange medium results in a refractive index distribution that decreases continuously from the center to the periphery in the glass rod. In this way, a gradient index lens is manufactured.
- the refractive index distribution type lens 102 Since the bottom surface of the refractive index distribution type lens 102 is flat, the end face of the optical fiber 101 can be easily attached, and the refractive index distribution type lens 1 It is possible to easily match the optical axis of the optical filter 02 with the optical axis of the optical filter 101.
- the gradient index rod lens 102 is a circle. Since the optical fiber unit 10 is columnar, the optical fiber unit 10 can be easily formed into a cylindrical shape. This makes it extremely easy to hold the optical fiber unit 10 by the jig 30.
- the single mode of the optical fiber 101 which has only one propagation mode, is different from the single mode in which excitation light can be generated when detecting a small amount of solute in a sample solution using photothermal conversion spectroscopy.
- the aperture By reducing the aperture as much as possible, the energy used for photothermal conversion is increased, and the thermal lens generated by the excitation light is made a lens with less aberration.
- the focal point of the excitation light becomes smaller.
- the thermal lens generated by the excitation light it is desirable to narrow down the detection light as much as possible in order to increase the amount of detection light passing through this thermal lens as much as possible. . From this point, it is preferable that the optical fiber transmits the excitation light and the detection light in a single mode.
- any optical fiber 101 can be used as long as it transmits the excitation light and the detection light.
- the output light does not have a Gaussian distribution, and the output pattern of the output light depends on various conditions such as the degree of bending of the optical fiber 101. Because of the change, stable emitted light cannot always be obtained. For this reason, it may be difficult to measure a small amount of solute, and the measured value may not be stable ( therefore, as described above, the optical fiber 101 is preferably of a single mode).
- an excitation light source 105 for emitting excitation light for exciting the sample solution, and for analyzing the sample solution, etc.
- a detection light source 106 that emits detection light that irradiates the sample to detect information
- a modulator 107 that modulates excitation light
- an optical fiber 1 A two-wavelength multiplexing element 108 for multiplexing the excitation light and the detection light to be incident on 01 is provided.
- the two-wavelength multiplexing element 500 has two gradient index rod lenses 501 and 502.
- the refractive index rod lenses 501 and 502 have almost the same overall length.
- the gradient index rod lenses 501 and 502 are fixed so that one end faces thereof are connected in series.
- An interference filter film 503 described later is formed between the one end surfaces.
- the excitation light source 105 is driven by an optical fiber 505 to one end face of the refractive index distribution type aperture lens 501 (hereinafter, the incident side). It is connected to the end face 504).
- the optical fiber 505 is connected to a position shifted from the center of the incident side end face 504.
- One end of the optical fiber 101 is connected to the incident side end face 504.
- the detection light source 106 is connected to one end face of a refractive index distribution type aperture lens 502 by an optical fiber 508.
- the optical fiber 508 is connected to a position shifted from the center of the one end face.
- the total length of the refractive index distribution type lens 501 is about 1/4 of the meandering period of the off-axis incident light beam.
- the above-described interference filter film 503 is formed of a dielectric multilayer film, and is formed by a film forming method such as sputtering. This interference filter film 503 reflects the excitation light propagating through the optical fiber 505 and reflects the detection light propagating through the optical fiber 508. have.
- the outgoing light beam of the excitation light propagated through the optical fiber 505 from the excitation light source 105 is subjected to a refractive index distribution from the incident side end face 504. It is incident on the mold lens 501.
- the emitted light beam becomes a light beam 506 whose beam diameter increases while meandering in the gradient index rod lens 501, and is incident on the interference filter film 503.
- Light beam 5 0 6 is reflected by an interference filter ⁇ "503 and becomes a light beam 507, which is incident on an optical fiber 101.
- the light beam 509 meanders and the beam diameter increases while meandering. Then, the light enters the interference filter film 503. The light beam 509 passes through the interference filter 503 and then becomes the light beam 507 and enters the optical fiber 101.
- the two-wavelength multiplexing element 500 has the interference filter film 503 of the dielectric multilayer film between the two refractive index type aperture lenses 501 and 502. Since it is only sandwiched and fixed, the number of components is small, and all components can be fixed, so that the loss of pumping light and detection light in the two-wavelength multiplexer 500 is small. Stable for long-term use, improving measurement sensitivity and stability. Further, since the refractive index distribution type lens elements 501 and 502 can be extremely small, the two-wavelength multiplexing element becomes extremely small, and the microchemical system can be miniaturized.
- the pump light and the detection light multiplexed by the two-wavelength multiplexing element 500 propagate through the optical fiber 101 and enter the optical fiber unit 10, where the refractive index distribution is obtained.
- the light exits from the lens 102.
- This emitted light is perpendicularly incident on the plate member 20 with the flow path.
- the plate member 20 with a flow path has a flow path 204 through which the sample solution flows, and is made of glass substrates 201, 202, and 203 that are adhered in three layers.
- the glass substrate 202 is provided with the above-mentioned flow path 204 through which the sample solution flows during mixing, stirring, synthesis, separation, extraction, detection, and the like.
- the material of the plate member 20 with a flow path is desirably glass from the viewpoint of durability and chemical resistance.
- glass having high acid resistance and alkali resistance specifically, borosilicate glass, soda lime glass, and aluminum Borosilicate glass, JT British glass Etc. are preferred.
- JT British glass Etc. is preferred.
- Adhesives for bonding the glass substrates 201, 202, and 203 to each other include, for example, UV-curable, thermosetting, two-liquid curable acrylic and epoxy-based organic adhesives. , And inorganic adhesives. Further, the glass substrates 201 to 203 may be fused to each other by heat fusion.
- the photoelectric converter 401 for detecting the detection light separates the excitation light and the detection light.
- a wavelength filter 403 for selectively transmitting only the detection light is provided.
- the pinhole of the member in which the pinhole is formed is located on the optical path of the detection light and at a position upstream of the photoelectric converter 401. It may be arranged as follows. The signal obtained from the photoelectric converter 401 is sent to a lock-in amplifier 404 in order to synchronize with the modulator 107 used for modulating the pump light, and then transmitted to the lock amplifier 404. Analyzed (analyzed) by computer 405.
- the two-wavelength multiplexing element 500 for multiplexing the excitation light and the detection light has two very small refractive index distributed rod lenses 5. Since it is composed of 0 1 and 502, the size of the micro chemical system can be reduced. Also, since the refractive index distribution type lens 102 is connected to the tip of the optical fiber 101 that propagates the excitation light and the detection light, the optical axis of the excitation light and the detection light is changed every measurement. It is not necessary to adjust the optical axis of the refractive index distributed type lens 102, and a jig for aligning the optical axis and a solid surface plate are not required. Efficiency is improved and the size of the microchemical system can be further reduced.
- the focal position of the excitation light emitted from the gradient index rod lens 102 needs to be located in the channel 204 of the plate member 20 with a channel.
- Refractive index The distributed lens 102 does not need to be in contact with the plate member 20 with the flow path, but if it does, it is bent by the thickness of the upper glass plate 201 of the plate member 20 with the flow path.
- the focal length of the rate distribution type lens 102 can be adjusted. If the thickness of the upper glass plate 201 is not sufficient, a spacer for adjusting the focal length may be inserted between any of the gradient index aperture lens 102 and the upper glass plate 201. . If the focal position of the excitation light is fixed in the flow path 204 of the plate member 20 with a flow path in this manner, the focal length adjustment is not necessary, and the microchemical system is not required. 1 can be further miniaturized.
- the refractive index rod lens 102 is set so that the focus position of the detection light slightly deviates by ⁇ L from the focus position of the excitation light (FIG. 4A).
- SZXA! Is a near disk calculated by SNA, Z is the wavelength of the excitation light (nm), and NA is the refractive index distribution type aperture.
- the numerical aperture of the drain 102 When an optical fiber is used, the numerical aperture of the light emitted from the optical fiber is small. Therefore, the optical fiber is used for calculating the confocal length when a land lens having a large numerical aperture is used. Use the numerical aperture of.
- the above AL value varies depending on the thickness of the sample to be measured.
- the value of ⁇ L represents the difference between the focal position of the detection light and the focal position of the excitation light
- the value of ⁇ L can be used when the focal length of the detection light is longer than the focal length of the excitation light or shorter. The same result.
- the tip of the optical fiber is processed into a spherical shape to form a lens, it is possible to narrow down the excitation light and detection light without attaching a lens to the tip of the optical fiber.
- Excitation light and detection due to almost no chromatic aberration The respective focal positions of the light emission become substantially the same. Therefore, there is a problem that the signal of the thermal lens is hardly detected.
- the lens formed by adding the tip of the optical fiber has another large aberration, so that there is a problem that the focus of the excitation light and the detection light is large. Therefore, in the present embodiment, the gradient index rod lens 102 is attached to the tip of the optical fiber 101.
- FIG. 2 is a diagram showing a schematic configuration of a microphone chemical system according to the second embodiment of the present invention.
- the microphone chemical system 2 according to the second embodiment has the same reference numerals as those of the microphone chemical system 1 according to the first embodiment. The description is omitted.
- the two-wavelength multiplexing device 600 is different from the two-wavelength multiplexing device 500 of the microphone chemistry system 1 according to the first embodiment. I have.
- the two-wavelength multiplexing element 600 has a two-wavelength multiplexing device in which an interference filter film of a dielectric multilayer film is interposed between the end faces of two gradient index load lenses 501 and 502. Instead of a configuration like the wave element 500, the excitation light and the detection light propagating through the optical fiber are collimated once by the collimator 110, and the dielectric The structure is such that the light is multiplexed by the multilayer filter 111.
- the excitation light and the detection light that have propagated through the optical fiber 101 are collimated by the collimator 110. Since the light is multiplexed by the dielectric multilayer filter 111, the two-wavelength multiplexing element is slightly larger than that of the microchemical system of the first embodiment. However, since the collimated light is multiplexed, the optical axis can be easily aligned, and a two-wavelength multiplexing device with lower loss can be easily manufactured. Industrial applicability
- the excitation light and the detection light are supplied to the guiding optical system by the first and second introduction light fibers, respectively. Since it is introduced, the excitation light and the detection light can be accurately introduced into the guiding optical system. After the excitation light and the detection light introduced into the guiding optical system are multiplexed by a two-wavelength multiplexing element and guided to the irradiation lens by a guiding light fiber, they are always coaxial with the excitation light and the detection light. Become. Further, since the excitation light and the detection light have no process of being guided as spatial light, there is no deviation of the optical axis due to a change in environment such as temperature. Therefore, measurement can be performed with high sensitivity.
- the work efficiency of the user can be improved.
- a jig for adjusting the optical axis is unnecessary, the size of the micro chemical system can be reduced.
- the excitation light and the detection light are multiplexed using a two-wavelength multiplexing element that reflects or transmits light according to the wavelength of the light.
- the miniaturization is easy, and the microchemical system can be further miniaturized.
- the two-wavelength multiplexing element connects two refractive index distribution rod lenses, and reflects one of the excitation light and the detection light therebetween, and the other. Since it is formed with a dielectric multilayer filter that transmits light, it is extremely compact, and the microchemical system can be further miniaturized. Further, since the loss of the excitation light and the detection light in the two-wavelength multiplexing element is small and stable for long-time use, the sensitivity and stability of measurement can be improved.
- the refractive index distribution type filter is formed on the surface of the refractive index distribution type lens. This eliminates the need for combining a dielectric multilayer filter separate from the rod lens with the gradient index rod lens, and can be easily manufactured. Further, since a jig for combining the refractive index distribution type lens and the dielectric multilayer film filter is not required, the microchemical system can be further miniaturized. In addition, the number of surfaces involved in the reflection is reduced, so that the loss of excitation light and detection light is smaller, and the sensitivity and stability of measurement can be further improved. .
- the thermal lens generated by the excitation light becomes a lens with small aberration.
- the irradiation lens is fixed to the end of the guide light fiber from which the excitation light and the detection light are emitted, all of the excitation light, the detection light, and the irradiation lens are used.
- the optical axis is fixed. Therefore, more accurate measurement is possible.
- the work efficiency of the user is further improved.
- a jig for adjusting the optical axis is not required, the size of the microchemical system can be further reduced.
- the frequency of the detection light is different from the frequency of the excitation light
- the irradiation lens is a lens having chromatic aberration.
- the micro chemical system can be further miniaturized.
- the irradiation lens is a gradient index lens
- the irradiation lens can be downsized. This can further reduce the size of the micro-mouth chemical system.
- the gradient index lens is a cylindrical rod lens
- the optical axis of the guide light fiber and the optical axis of the rod lens can be easily adjusted. It is easy to hold as well as easy to manufacture. Easy to manufacture and maintain.
- the excitation light and the detection light multiplexed by the two-wavelength multiplexing element are converted by the induction light filter. Since the light propagates to the irradiation lens in single mode, the excitation light and the detection light are always coaxial.
- the excitation light and the detection light have no process of being guided as spatial light, there is no deviation of the optical axis due to a change in environment such as temperature. Therefore, measurement can be performed with high sensitivity. Further, there is no need to adjust the optical axes of the excitation light and the detection light, and the work efficiency of the user can be improved.
- the two-wavelength multiplexing element includes the excitation light and the excitation light by the dielectric multilayer filter formed between the two connected refractive index distribution type lens elements. Since either one of the detection lights is reflected and the other is transmitted and combined, the loss of the excitation light and the detection light in the two-wavelength multiplexing element is small, and the excitation light and the detection light can be used for a long time. Light is stable. For this reason, the sensitivity and stability of the measurement can be improved.
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
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Description
Claims
Priority Applications (1)
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US10/830,284 US7339677B2 (en) | 2001-10-22 | 2004-04-21 | Microchemical system, and photothermal conversion spectroscopic analysis method |
Applications Claiming Priority (2)
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JP2001-323350 | 2001-10-22 | ||
JP2001323350A JP3848125B2 (ja) | 2001-10-22 | 2001-10-22 | 光熱変換分光分析方法及びマイクロ化学システム |
Related Child Applications (1)
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US10/830,284 Continuation US7339677B2 (en) | 2001-10-22 | 2004-04-21 | Microchemical system, and photothermal conversion spectroscopic analysis method |
Publications (1)
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WO2003036279A1 true WO2003036279A1 (fr) | 2003-05-01 |
Family
ID=19140251
Family Applications (1)
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---|---|---|---|
PCT/JP2002/009464 WO2003036279A1 (fr) | 2001-10-22 | 2002-09-13 | Systeme micro-chimique et procede spectroscopique de conversion photothermique |
Country Status (4)
Country | Link |
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US (1) | US7339677B2 (ja) |
JP (1) | JP3848125B2 (ja) |
CN (1) | CN1575414A (ja) |
WO (1) | WO2003036279A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004029633A1 (ja) * | 2002-09-27 | 2004-04-08 | Nippon Sheet Glass Co., Ltd. | マイクロ化学システム |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100487055B1 (ko) * | 2000-01-28 | 2005-05-04 | 아사히 가세이 가부시키가이샤 | 광열 변환 분광 분석 장치 |
US20040175297A1 (en) * | 2003-03-04 | 2004-09-09 | Nippon Sheet Glass Co., Ltd. | Microchemical system |
JP4145892B2 (ja) * | 2005-04-20 | 2008-09-03 | 日本板硝子株式会社 | 熱レンズ分光分析システム及び熱レンズ信号補正方法 |
JP2009210323A (ja) * | 2008-03-03 | 2009-09-17 | Nippon Sheet Glass Co Ltd | 多チャンネル熱レンズ分光分析システム及び多チャンネル熱レンズ分光分析方法 |
JP6358735B2 (ja) * | 2014-02-26 | 2018-07-18 | オリンパス株式会社 | 光音響顕微鏡装置 |
US20180177404A1 (en) * | 2015-06-26 | 2018-06-28 | Lightlab Imaging, Inc. | Gradient Index Lens Assembly-Based Imaging Apparatus, Systems and Methods |
CN105510234A (zh) * | 2015-12-31 | 2016-04-20 | 合肥知常光电科技有限公司 | 一种基于光纤传感的激光激发热波信号检测装置 |
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US257575A (en) * | 1882-05-09 | Sheet-delivery apparatus for printing-presses | ||
US2038A (en) * | 1841-04-10 | Machine for cutting staves | ||
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US4938593A (en) | 1987-01-30 | 1990-07-03 | The Regents Of The University Of Michigan | Photothermal densitometer for reading electrophoresis gels |
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EP1011007B1 (en) | 1997-08-08 | 2005-07-06 | National Institute of Advanced Industrial Science and Technology | Optical control method and apparatus |
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KR100487055B1 (ko) | 2000-01-28 | 2005-05-04 | 아사히 가세이 가부시키가이샤 | 광열 변환 분광 분석 장치 |
JP2002365252A (ja) * | 2001-06-12 | 2002-12-18 | Nippon Sheet Glass Co Ltd | マイクロ化学システム |
JP2003021704A (ja) * | 2001-07-10 | 2003-01-24 | Nippon Sheet Glass Co Ltd | 一組の屈折率分布型ロッドレンズ及び該レンズを備えたマイクロ化学システム |
JP2003042982A (ja) | 2001-07-27 | 2003-02-13 | Nippon Sheet Glass Co Ltd | 光熱変換分光分析方法及びその方法を実行するマイクロ化学システム |
JP3824224B2 (ja) * | 2002-09-27 | 2006-09-20 | 日本板硝子株式会社 | マイクロ化学システム |
-
2001
- 2001-10-22 JP JP2001323350A patent/JP3848125B2/ja not_active Expired - Fee Related
-
2002
- 2002-09-13 WO PCT/JP2002/009464 patent/WO2003036279A1/ja active Application Filing
- 2002-09-13 CN CN02820937.0A patent/CN1575414A/zh active Pending
-
2004
- 2004-04-21 US US10/830,284 patent/US7339677B2/en not_active Expired - Fee Related
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JPH08248266A (ja) * | 1995-01-13 | 1996-09-27 | Seiko Giken:Kk | 光ファイバフェルールおよび前記光ファイバフェルールを用いた光カプラ |
EP1087223A1 (en) * | 1998-06-12 | 2001-03-28 | Asahi Kasei Kogyo Kabushiki Kaisha | Analyzer |
JP2000002677A (ja) * | 1998-06-15 | 2000-01-07 | Asahi Chem Ind Co Ltd | 分析装置 |
JP2001059829A (ja) * | 1999-08-25 | 2001-03-06 | Univ Osaka Sangyo | 光熱レンズ型試料分析装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2004029633A1 (ja) * | 2002-09-27 | 2004-04-08 | Nippon Sheet Glass Co., Ltd. | マイクロ化学システム |
US7142305B2 (en) | 2002-09-27 | 2006-11-28 | Nippon Sheet Glass Company, Limited | Microchemical system |
Also Published As
Publication number | Publication date |
---|---|
JP3848125B2 (ja) | 2006-11-22 |
CN1575414A (zh) | 2005-02-02 |
US7339677B2 (en) | 2008-03-04 |
JP2003130826A (ja) | 2003-05-08 |
US20040196466A1 (en) | 2004-10-07 |
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