WO2005124321A1 - 測定装置 - Google Patents
測定装置 Download PDFInfo
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- WO2005124321A1 WO2005124321A1 PCT/JP2005/011293 JP2005011293W WO2005124321A1 WO 2005124321 A1 WO2005124321 A1 WO 2005124321A1 JP 2005011293 W JP2005011293 W JP 2005011293W WO 2005124321 A1 WO2005124321 A1 WO 2005124321A1
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- Prior art keywords
- light
- microplate
- optical system
- sample
- objective lens
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Classifications
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- 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N21/6456—Spatial resolved fluorescence measurements; Imaging
- G01N21/6458—Fluorescence microscopy
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- 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N21/6452—Individual samples arranged in a regular 2D-array, e.g. multiwell plates
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/0004—Microscopes specially adapted for specific applications
- G02B21/002—Scanning microscopes
- G02B21/0024—Confocal scanning microscopes (CSOMs) or confocal "macroscopes"; Accessories which are not restricted to use with CSOMs, e.g. sample holders
- G02B21/0052—Optical details of the image generation
- G02B21/0064—Optical details of the image generation multi-spectral or wavelength-selective arrangements, e.g. wavelength fan-out, chromatic profiling
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/0004—Microscopes specially adapted for specific applications
- G02B21/002—Scanning microscopes
- G02B21/0024—Confocal scanning microscopes (CSOMs) or confocal "macroscopes"; Accessories which are not restricted to use with CSOMs, e.g. sample holders
- G02B21/0052—Optical details of the image generation
- G02B21/0076—Optical details of the image generation arrangements using fluorescence or luminescence
Definitions
- the present invention is directed to irradiating a sample with light and performing fluorescence correlation spectroscopy (FCS) or the like for analyzing the intensity fluctuation of fluorescence emitted from a labeled fluorescent substance in the sample.
- FCS fluorescence correlation spectroscopy
- the present invention relates to a measuring device, and particularly to a measuring device provided with an aim detection device for focusing a sample on incident light.
- the basic technology of the present invention is a technology related to fluorescence correlation spectroscopy using a laser based on a confocal optical microscope.
- fluorescence correlation spectroscopy proteins and colloid particles labeled with a fluorescent substance are suspended in a solution in the field of view of a confocal optical microscope, and laser light is applied to the suspension to excite the fluorescent substance. It analyzes the fluctuation of the fluorescence intensity based on the Brownian motion of a fine substance to determine the autocorrelation function, and measures the number of target particles and the translational diffusion velocity.
- Japanese Patent Application Laid-Open No. 11-502608 discloses a technique based on a confocal optical microscope, which irradiates a fluorescently labeled sample on a sample stage with laser light and analyzes the intensity fluctuation of the fluorescence emitted from the sample.
- a method and an apparatus for obtaining statistical properties such as the translational diffusion coefficient of fluorescent molecules and interaction between molecules are disclosed.
- a sample storage container called a microplate is often used. If a microplate is used, many samples can be accommodated separately in a plurality of wells accommodating samples on the microplate at a time, and each can be measured separately. Further, since a very small amount of sample at the microliter level can be measured, there is an advantage that it is not necessary to prepare a large amount of sample.
- fluorescence correlation spectroscopy the bottom of a microplate is made of transparent glass or the like, and an objective lens is placed below the microplate.
- the bottom surface position of the microplate is detected using the measurement optical system as it is.
- the light from the light source is collected and irradiated from the bottom of the microplate, and the condensing position on the optical axis of the incident light is moved little by little along the optical axis and directly reflected from the bottom of the microplate.
- the intensity of the reflected light is measured, the position on the optical axis where the peak is detected is determined as the bottom surface position of the microplate, and the focus position in the microplate is set based on this positional information. I have.
- reflected light having a light source power is received by a CCD power camera, and a spot position on a light receiving surface is detected to determine a bottom surface position of the plate.
- the focus position of the light source is adjusted in accordance with.
- the shift of the focus position of the sample is detected from the shift of the light spot position of the light source received by the differential diode on the light receiving surface. Based on the above, the sample stage is moved along the optical axis and controlled so that the light spot of the light source always coincides with the sample surface.
- the method described in Japanese Patent Publication No. 02-59963 is for adjusting the focus position of the observation optical system to the position of light on the sample by the focus position detection optical system. It is necessary that the light of the position detection optical system be observed on the sample. Therefore, in the case of a liquid sample, it is difficult to apply the light of the focus position detecting optical system to the liquid sample because it cannot form an image on the liquid sample.
- the present invention has been made in view of a powerful situation, and has a measurement device provided with an aim detection device that can quickly focus on a sample and can be applied to a liquid sample.
- the purpose is to provide.
- the immersion medium measuring device irradiates a sample contained in a container with light emitted from a light source, detects light emitted from the sample, and detects the physical and physical properties of the sample.
- a measuring optical system for measuring the sample and a position detecting optical system for detecting a position of a bottom surface of the container are provided.
- FIG. 1 is a diagram showing a configuration of a measuring apparatus according to a first embodiment of the present invention.
- FIG. 2 is a diagram showing a configuration of a two-divided light receiving element.
- FIG. 3A is a view showing a light beam reflection state corresponding to a distance between an objective lens and a microplate.
- FIG. 3B is a view showing a light beam reflection state corresponding to the distance between the objective lens and the microplate.
- FIG. 3C is a diagram showing a light beam reflection state corresponding to the distance between the objective lens and the microplate.
- FIG. 4A is a diagram showing a light condensing position on a two-segment light receiving element.
- FIG. 4B is a diagram showing a light condensing position on a two-segment light receiving element.
- FIG. 4C is a diagram showing a light condensing position on a two-segment light receiving element.
- ⁇ 6] is a diagram showing the aim detection value.
- FIG. 7 is a diagram showing a result of the operation.
- FIG. 8 A diagram showing a configuration of a measuring apparatus according to a second embodiment of the present invention.
- FIG. 9A is a view showing a light beam corresponding to an interval between an objective lens and a microplate.
- FIG. 9B is a view showing a light beam corresponding to the distance between the objective lens and the microplate.
- FIG. 9C is a view showing a light beam corresponding to the distance between the objective lens and the microplate.
- FIG. 10A is a view showing the state of irradiation on a pinhole.
- FIG. 10B is a view showing an irradiation state of a pinhole.
- FIG. 10C is a view showing an irradiation state of a pinhole.
- FIG. 11 is a diagram showing outputs of two photodetectors.
- [13A] A diagram showing the shape of an aim detection light beam.
- FIG. 13B is a diagram showing the shape of a light beam for aim detection.
- FIG. 13C illustrates a shape of an aim detection light beam.
- FIG. 14 is a diagram illustrating a positional relationship between an aiming optical system and a measuring optical system.
- FIG. 15A is a diagram showing a reflection state of a light beam and an irradiation state on a two-divided light receiving element corresponding to a distance between an aiming optical system and a microplate.
- FIG. 15B is a diagram showing a reflection state of a light beam corresponding to a distance between the aiming optical system and the microplate, and an irradiation state on a two-divided light receiving element.
- FIG. 15C is a diagram showing a reflection state of a light beam corresponding to a distance between the aiming optical system and the microplate, and an irradiation state on a two-divided light receiving element.
- a position detection operation for detecting a predetermined position is executed, and then, based on the result, a position adjustment operation for adjusting a focus position is executed. Focusing was performed by a series of operations. Therefore, if the device can be configured so that the position adjustment operation is executed by executing the position detection operation among these operations, the focusing operation can be quickly performed.
- the position adjustment operation cannot be performed by directly detecting the reflected light from the liquid sample.
- the position of the container that stores the liquid sample cannot be adjusted. If the apparatus can be configured so as to execute the position adjustment operation on the liquid sample as a result of the detection, the focusing operation can be quickly performed on the liquid sample as well.
- the condensing optical system refers to an optical system having a function of condensing a light beam using a lens.
- FIG. 1 is a diagram showing a configuration of a measuring device according to a first embodiment of the present invention.
- the aim detection optical system and the measurement optical system are configured as separate optical paths.
- an argon laser having a wavelength of 488 nm is used as the light source 1.
- This argon laser acts as excitation light for exciting the sample.
- the measuring beam emitted from the light source 1 becomes parallel light whose beam diameter has been expanded by the beam expander 2.
- the measurement beam is reflected by the dike mirror 3 and passes through the filter 18 and the dichroic beam splitter 17. Then, the light is focused by the objective lens 4.
- An objective lens driving mechanism 30 is provided around the objective lens 4.
- the objective lens driving mechanism 30 holds the objective lens 4 and moves the objective lens 4 along the optical axis manually or by a controller 35. Can be moved. Thus, the focusing position of the measurement beam can be adjusted.
- the focused measurement beam passes through the bottom surface of the microplate 5 and focuses on the sample solution in the well.
- the focus position is 10 / zm upward from the bottom surface of the well of the microplate 5, that is, from the upper bottom surface of the microplate 5.
- a sample 6 labeled with a fluorescent substance is accommodated in the well of the microplate 5 and emits fluorescence when excited by the measurement beam.
- the fluorescent substance for example, rhodamine 'darin (RhG) is used.
- the dichroic beam splitter 17 has a property of transmitting the measurement beam and the fluorescence
- the filter 18 has a property of blocking a laser beam for aiming detection described later.
- the fluorescent light transmits through the dichroic mirror 3, transmits through the filter 7 that transmits only the fluorescent light, and is collected by the condenser lens 8 in the plane of the pinhole 40.
- the fluorescence from which noise light generated in the well by the pinhole 40 has been removed is received by the photodetector 9 disposed behind the pinhole 40 and converted into a measurement signal.
- the aiming detection light beam emitted from the aiming detection laser 10 having polarization characteristics is converted into parallel light by the collimating lens 11, and the light beam of half of the cross section is cut off by the shielding plate 12 arranged in the optical path. It is shaded. At this time, the cross section of the light beam is substantially semicircular.
- the other half of the light beam is reflected by the polarizing beam splitter 13, condensed by the lens 14, passes through the relay lens 15, and is converted from linearly polarized light to circularly polarized light by the 1Z4 wavelength plate 16.
- This light beam is reflected by the dichroic beam splitter 17, and is condensed by the objective lens 4 on the upper bottom surface of the microphone port plate 5.
- This light beam is reflected by the upper bottom surface of the microplate 5, passes through the objective lens 4, and is reflected by the dichroic beam splitter 17 .
- the circularly polarized light is also converted into linearly polarized light.
- the light beam that has passed through the polarizing beam splitter 13 is condensed by a lens 20 and received by a two-segment light receiving element 21 arranged at the focus position. Then, based on the output of the two-divided light receiving element 21, the controller 35 drives the objective lens driving mechanism 30 to move the objective lens 4 along the optical axis.
- FIG. 2 is a diagram showing a configuration of the two-segment light receiving element 21.
- the two-divided light receiving element 21 includes two photoelectric conversion elements 21a and 21b having the same material strength and the same shape. Next, the position on the two-divided light receiving element 21 where the light beam condensed by the lens 20 is irradiated will be described.
- FIGS. 3A, 3B, and 3C are views showing reflection states of a light beam corresponding to the distance between the objective lens 4 and the microplate 5.
- FIG. 3A, 3B, and 3C are views showing reflection states of a light beam corresponding to the distance between the objective lens 4 and the microplate 5.
- the reflected light beam passes through a position symmetric with respect to the center axis of the objective lens 4, as shown in FIG. 3B. I do.
- the reflected light beam approaches the center of the objective lens 4 as shown in FIG. Pass through the position. If the distance between the objective lens 4 and the bottom surface of the microplate 5 is larger than a predetermined value, the reflected light beam moves away from the center of the objective lens 4 as shown in FIG. 3C. Pass through the position.
- FIGS. 4A, 4B, and 4C are diagrams showing light-condensing positions on the two-divided light-receiving element 21 depending on the distance between the objective lens 4 and the microplate 5.
- FIG. 4A, 4B, and 4C are diagrams showing light-condensing positions on the two-divided light-receiving element 21 depending on the distance between the objective lens 4 and the microplate 5.
- the reflected light beams irradiate the photoelectric conversion elements 21a and 21b evenly.
- the reflected light beam irradiates the photoelectric conversion element 21a more.
- the distance between the objective lens 4 and the bottom surface of the microplate 5 is closer than a predetermined value, as shown in FIG. 4A, more irradiation is performed on the photoelectric conversion element 21b.
- the light beam on the two-segment light receiving element 21 is large due to the distance between the objective lens 4 and the bottom surface of the It should be noted that the size changes.
- FIG. 5 is a diagram showing the outputs A and B of the two photoelectric conversion elements 21a and 21b when the objective lens 4 is moved in the optical axis direction.
- the output A and the output B are equal, but as the distance (Z) increases, the output A increases, and the distance A further increases. As (Z) spreads, only the output A is output, and as the light beam departs from the photoelectric conversion element 21a, the output A decreases.
- the output B can be similarly explained.
- the controller 35 calculates an aim detection value (A ⁇ B) Z (A + B) shown in FIG. 6 from the signals of the outputs A and B. Then, the objective lens drive mechanism 30 is operated to move the objective lens 4 in the optical axis direction, and feedback control is performed so that the aim detection value becomes a value corresponding to the deviation amount D.
- This aim detection value indicates the distance between the objective lens 4 and the upper bottom surface of the microplate 5. By this operation, the distance between the objective lens 4 and the upper bottom surface of the microplate 5 is controlled to be a predetermined value.
- FIG. 7 shows the result of the above operation.
- the focus position (X) of the laser for aim detection is located on the upper bottom surface of the microplate 5.
- the in-focus position (Y) of the measuring laser is located above the in-focus position (X) of the aiming detection laser by a shift amount D along the optical axis. That is, the focus position (X) of the aiming detection laser and the focus position (Y) of the measurement laser are adjusted so as to be shifted in advance along the optical axis by an amount D.
- the deviation D can be adjusted to an appropriate value depending on the amount of the sample to be measured, the type of the microplate 5, and the like.
- an electrical offset is applied to the aiming detection value “(A ⁇ B) Z (A + B)” shown in FIG. 6, and the controller 35 adjusts the offset aiming value. It controls the detection value to be 0. Then, the electric offset amount is input from an external setting device (not shown).
- the controller 35 controls the aim detection value “(A ⁇ B) Z (A + B)” shown in FIG. Is what you do. Then, the offset value that is the control target value is input from an external setting device (not shown).
- the third adjustment method is configured so that the wavelength of the detection light for aiming and the wavelength of the light for measurement are different. For example, when an infrared laser beam is used as the aim detection light, the focus position between the aim detection light and the measurement light is different due to the chromatic aberration of the objective lens 4, and the difference between the positions can be used as the shift amount D.
- the fourth adjustment method is a method of adjusting an optical system.
- the shift amount D can be adjusted by moving the condenser lens 14 along the optical axis in the aim detection optical system. This is because the focusing position along the optical axis of the aim detection light beam can be changed by moving the condenser lens 14. Therefore, a mechanism that allows the condenser lens 14 to move along the optical axis may be provided to adjust the shift amount D.
- the relay lens 15 shown in FIG. 1 may be moved along the optical axis instead of moving the condenser lens 14 along the optical axis.
- the fifth adjustment method is a method of adjusting the optical system in the same manner, but adjusts the light condensing position in the microplate 5 and then adjusts the position of the two-division light receiving element 21 which is the light receiving position. Adjust.
- the light-condensing position is adjusted by inputting light that is more divergent or converged than the collimated state to the objective lens 4.
- the aim detection laser 10 and the collimating lens 11 may be moved in a direction relatively away from each other. This has the same effect as moving the relay lens 15 and the condenser lens 14 in a direction relatively away from each other.
- the light receiving position is adjusted to a position corresponding to the shift amount D adjusted at the focusing position.
- the adjustment of the light receiving position is performed by moving the lens 20 and the two-segment light receiving element 21 relatively closer to each other in accordance with the shift amount D.
- the adjustment of the condensing position and the adjustment of the light receiving position may be performed manually or may be automatically performed.
- software may be created so that the light collecting position and the light receiving position are adjusted in the above-described manner, and the position driving device may be operated.
- the amount of deviation D is adjusted within the sample solution 10 ⁇ m above the bottom surface of the microplate 5.
- an argon laser with a wavelength of 488 nm.
- a helium neon laser with a wavelength of 633 nm.
- the aim detection light source for example, an infrared semiconductor laser having a wavelength of 780 nm is used.
- the aim detection light source does not need to be infrared light, and may be, for example, long wavelength visible light.
- the aim detection light source does not need to be a laser, and an LED may be used. If LEDs are used, the device can be manufactured small and inexpensively. When an LED is used, light can be used efficiently by inserting a polarizing plate between the collimating lens 11 and the polarizing beam splitter 13.
- the aim detection light beam emitted from the aim detection laser 10 is shielded by a shielding plate 12 arranged in the optical path so that a half of the luminous flux of its cross section is blocked.
- the cross section of the light beam is substantially semicircular.
- the shielding plate 12 since the light near the central axis of the light beam has a high intensity, there is a possibility that the influence of diffraction by the shielding plate 12 may occur. That is, of the semicircular cross-sections, (1) light near the center of the original circle and (2) light near the center line of the original circle are easily affected by diffraction. Hope to do so.
- FIGS. 13A, 13B, 13C, and 13D are diagrams showing the shape of the aim detection light beam.
- the shielding plate 12 is moved to a position where light is further shielded from the center line. As a result, it is possible to eliminate the influence of diffraction due to strong light near the central axis.
- the shape of the shielding plate 12 is further changed to shield light near the central axis.
- the shape of the shielding plate 12 may be a triangular shape as shown in FIG. 13C or a square shape as shown in FIG. 13D.
- FIG. 8 is a diagram showing a configuration of a measuring device according to a second embodiment of the present invention.
- the measuring apparatus according to the second embodiment differs from the first embodiment in the configuration of the optical system for aim detection. Therefore, the same portions as those of the first embodiment are denoted by the same reference numerals, and the detailed description is omitted.
- the aim detection light beam emitted from the aim detection laser 10 is condensed by the beam expander 23 and then expanded again, reflected by the polarization beam splitter 13 and reflected by the lens 24. Becomes parallel light. Then, the linearly polarized light is The light is converted into circularly polarized light and reflected by the dichroic beam splitter 17.
- the light reflected by the dichroic beam splitter 17 passes through the objective lens 4, is collected, and is irradiated on the microplate 5.
- the light reflected by the upper bottom surface of the microplate 5 passes through the objective lens 4 again, is converted into a parallel light beam, and is reflected by the dichroic beam splitter 17.
- the light passes through the 1Z4 wavelength plate 16, is converted from circularly polarized light into linearly polarized light, and reaches the lens 24.
- the reflected light condensed by the lens 24 passes through the polarization beam splitter 13 and is split into two traveling directions by the beam splitter 25.
- One light passes through a pinhole 26 provided on the optical axis ahead of the focus point Q, and is received by a photodetector 27. From the photodetector 27, an electric signal A corresponding to the intensity of the received light is output. The other light beam passes through a pinhole 28 disposed on the optical axis behind the focus point Q, and is received by another photodetector 29. From the photodetector 29, an electric signal B corresponding to the received light intensity is obtained as an output signal.
- FIGS. 9A, 9B, and 9C are diagrams showing light fluxes corresponding to the distance between the objective lens 4 and the microplate 5.
- FIG. 9A, 9B, and 9C are diagrams showing light fluxes corresponding to the distance between the objective lens 4 and the microplate 5.
- the distance between the objective lens 4 and the bottom surface of the microplate 5 is a predetermined value (focal length)
- the light passes through the objective lens 4 and becomes a parallel light beam as shown in FIG. 9B.
- the distance between the objective lens 4 and the bottom surface of the microplate 5 is smaller than a predetermined value
- the light beam diverges after passing through the objective lens 4 as shown in FIG. 9A.
- the distance between the objective lens 4 and the bottom surface of the microphone port plate 5 is larger than a predetermined value, the light flux converges after passing through the objective lens 4, as shown in FIG. 9C.
- FIGS. 10A, 10B, and 10C are views showing irradiation states on the pinholes 26 and 28 corresponding to the distance between the objective lens 4 and the microplate 5.
- FIG. 10A, 10B, and 10C are views showing irradiation states on the pinholes 26 and 28 corresponding to the distance between the objective lens 4 and the microplate 5.
- the distance between the objective lens 4 and the bottom surface of the microplate 5 is a predetermined value, as shown in FIG. 10B, the light beam incident on the lens 24 is focused on the focus point Q, and Irradiate detectors 27 and 29 evenly.
- the distance between the objective lens 4 and the bottom surface of the microplate 5 becomes smaller than a predetermined value, as shown in FIG.
- the light is condensed on the pinhole 28 and irradiated more on the photodetector 29.
- the distance between the objective lens 4 and the bottom surface of the microplate 5 is more than a predetermined value, the light beam incident on the lens 24 is focused on the pinhole 26 as shown in FIG. 10C. Then, more light is irradiated by the photodetector 27.
- FIG. 11 is a diagram illustrating the outputs A and B of the two photodetectors 27 and 29 when the objective lens 4 is moved in the optical axis direction.
- Output A is equal to output B, but output A increases as the interval increases, and output A continues to saturate as the interval increases, and then output A decreases.
- Output B can be explained similarly.
- the controller 35 uses the signals of the outputs A and B to detect the aim detection value (A-B) Z (A + B
- the objective lens driving mechanism 30 is operated to move the objective lens 4 in the optical axis direction, and feedback control is performed so that the aim detection value becomes a set value corresponding to the deviation amount D.
- the distance between the objective lens 4 and the bottom surface of the microplate 5 is controlled to be a predetermined value.
- the focus position (X) of the aiming detection laser and the focus position (Y) of the measurement laser are set along the optical axis. It is adjusted in advance so that it is shifted by the amount D.
- the displacement D can be adjusted by moving the lens 24 along the optical axis.
- the measuring apparatus is different from the first embodiment in that the configuration of the aiming optical system is not a focusing optical system. Therefore, the same portions as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.
- FIG. 14 is a diagram illustrating the positional relationship between the aiming optical system and the measuring optical system.
- FIG. 14 shows the vicinity of the objective lens 4 and the microplate 5 in an enlarged manner.
- the aiming optical system includes a light source 41, a lens 42, and a two-divided light receiving element 45. Note that
- the light source 41, the lens 42, and the two-piece light receiving element 45 are integrated with the objective lens 4 and are not shown.
- the aim detection light beam emitted from the aim detection light source 41 is converted into parallel light by the lens 42 and applied to the lower bottom surface of the microplate 5. Then, the reflected light is input to a two-segment light receiving element 45 having two light receiving surfaces.
- FIGS. 15A, 15B, and 15C are diagrams showing the reflection state of the light beam and the irradiation state on the two-divided light receiving element corresponding to the distance between the aiming optical system and the microplate 5.
- FIG. 15A, 15B, and 15C are diagrams showing the reflection state of the light beam and the irradiation state on the two-divided light receiving element corresponding to the distance between the aiming optical system and the microplate 5.
- the reflected light beam is equally distributed to the light receiving elements 45a and 45b of the two-part light receiving element. Irradiation.
- the reflected light beam passes through the light receiving element 45a of the two-segment light receiving element. Irradiate a lot.
- the reflected light beam is more supplied to the light receiving element 45b of the two-part light receiving element. Irradiate.
- the aim detection value (A ⁇ B) Z (A + B) is calculated from the outputs A and B of the light receiving elements 45a and 45b.
- the objective lens drive mechanism 30 is operated to move the aiming optical system and the objective lens 4 in the optical axis direction, and feedback control is performed so that the aiming detection value becomes a specified value (for example, 0).
- the distance between the aiming optical system and the lower bottom surface of the microplate 5 is controlled to be a predetermined value.
- the focus position of the measuring optical system (not shown) can be controlled to a predetermined position in the well.
- the aim detection light beam may be applied to the upper bottom surface of the microplate 5.
- the present invention is not limited to the above embodiments.
- the required effect can be obtained if the 1Z4 wavelength plate 16 in FIG. 1 is provided between the polarization beam splitter 13 and the dichroic beam splitter 17, without being provided after the lens 15.
- the condensing lens 14 is arranged in the common light path for light emission and light reception in FIG. 1, but between the collimating lens 11 and the polarization beam splitter 13 for light emission, and the polarization beam for light reception.
- Splitter 1 It may be installed separately between 3 and the lens 20.
- the two-division light receiving elements 21 and 45 can be replaced with position sensors (PSD: Position Sensitive Detector) to directly measure the position where the light beam is irradiated.
- PSD Position Sensitive Detector
- one type of measuring laser is used in each of the above embodiments, a plurality of measuring lasers are used.
- a measuring device having a plurality of light projecting systems and light receiving systems may be configured.
- the same effect can be obtained by setting the focus position of the focus detection laser not on the upper bottom surface of the microplate but on the lower bottom surface of the microplate 5.
- the focus following operation is performed when changing the measurement target level. During the measurement, the focus following operation may be stopped.
- the present invention is not limited to the above-described embodiment as it is, and may be modified by modifying its constituent elements without departing from the scope of the invention at the stage of implementation.
- Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.
- the present invention can be widely used in the industry for manufacturing a measurement device provided with an aim detection device that can quickly focus on a sample and can be applied to a liquid sample.
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2006514824A JP4914715B2 (ja) | 2004-06-21 | 2005-06-20 | 倒立顕微鏡システム |
EP05750918.4A EP1760455A4 (en) | 2004-06-21 | 2005-06-20 | MEASURING DEVICE |
US11/643,616 US7369220B2 (en) | 2004-06-21 | 2006-12-21 | Measuring apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004182510 | 2004-06-21 | ||
JP2004-182510 | 2004-06-21 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/643,616 Continuation US7369220B2 (en) | 2004-06-21 | 2006-12-21 | Measuring apparatus |
Publications (1)
Publication Number | Publication Date |
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WO2005124321A1 true WO2005124321A1 (ja) | 2005-12-29 |
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PCT/JP2005/011293 WO2005124321A1 (ja) | 2004-06-21 | 2005-06-20 | 測定装置 |
Country Status (4)
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US (1) | US7369220B2 (ja) |
EP (1) | EP1760455A4 (ja) |
JP (2) | JP4914715B2 (ja) |
WO (1) | WO2005124321A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101995397A (zh) * | 2009-08-12 | 2011-03-30 | 索尼公司 | 光检测芯片和设置有光检测芯片的光检测装置 |
JP2016090383A (ja) * | 2014-11-05 | 2016-05-23 | 株式会社小野測器 | レーザ測定装置及び照準光合成装置 |
JPWO2015181951A1 (ja) * | 2014-05-30 | 2017-04-20 | 株式会社ニコン | 観察装置、顕微鏡、観察方法、及び観察プログラム |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4782593B2 (ja) * | 2006-03-13 | 2011-09-28 | 株式会社日立製作所 | 光検出装置 |
EP2051051B1 (en) * | 2007-10-16 | 2020-06-03 | Cambridge Research & Instrumentation, Inc. | Spectral imaging system with dynamic optical correction |
JP5553374B2 (ja) * | 2008-06-24 | 2014-07-16 | 独立行政法人産業技術総合研究所 | 溶融材料の光学測定装置および光学測定方法 |
KR101801355B1 (ko) * | 2011-03-25 | 2017-11-24 | 엘지전자 주식회사 | 회절 소자와 광원을 이용한 대상물의 거리 인식 장치 |
CN104297218B (zh) * | 2013-07-15 | 2016-09-14 | 中国科学院沈阳自动化研究所 | 远距离冶金液态金属成分的原位、在线检测装置及方法 |
JP6446432B2 (ja) * | 2014-03-05 | 2018-12-26 | 株式会社日立ハイテクノロジーズ | 顕微分光装置 |
GB2534402A (en) * | 2015-01-22 | 2016-07-27 | Idea Biomedical Ltd | Auto-focussing method and device |
DE102015112628A1 (de) | 2015-07-31 | 2017-02-02 | Carl Zeiss Microscopy Gmbh | Verfahren zur Erzeugung eines digitalen Fluoreszenzbildes |
DE102016013236B4 (de) * | 2016-11-07 | 2020-07-16 | Particle Metrix Gmbh | Vorrichtung und Verfahren zum Messen der Konzentration, der Größe und des Zetapotentials von Nanopartikeln in Flüssigkeiten im Streulichtmodus und im Fluoreszenzmodus |
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2005
- 2005-06-20 WO PCT/JP2005/011293 patent/WO2005124321A1/ja not_active Application Discontinuation
- 2005-06-20 EP EP05750918.4A patent/EP1760455A4/en not_active Ceased
- 2005-06-20 JP JP2006514824A patent/JP4914715B2/ja active Active
-
2006
- 2006-12-21 US US11/643,616 patent/US7369220B2/en active Active
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2011
- 2011-07-22 JP JP2011161269A patent/JP5469133B2/ja not_active Expired - Fee Related
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101995397A (zh) * | 2009-08-12 | 2011-03-30 | 索尼公司 | 光检测芯片和设置有光检测芯片的光检测装置 |
JPWO2015181951A1 (ja) * | 2014-05-30 | 2017-04-20 | 株式会社ニコン | 観察装置、顕微鏡、観察方法、及び観察プログラム |
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JP2016090383A (ja) * | 2014-11-05 | 2016-05-23 | 株式会社小野測器 | レーザ測定装置及び照準光合成装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2005124321A1 (ja) | 2008-04-10 |
US7369220B2 (en) | 2008-05-06 |
JP2011203281A (ja) | 2011-10-13 |
EP1760455A4 (en) | 2016-12-21 |
JP5469133B2 (ja) | 2014-04-09 |
EP1760455A1 (en) | 2007-03-07 |
US20070103687A1 (en) | 2007-05-10 |
JP4914715B2 (ja) | 2012-04-11 |
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