WO2006018946A1 - 自動焦点装置及びそれを用いた顕微鏡装置 - Google Patents
自動焦点装置及びそれを用いた顕微鏡装置 Download PDFInfo
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- WO2006018946A1 WO2006018946A1 PCT/JP2005/013299 JP2005013299W WO2006018946A1 WO 2006018946 A1 WO2006018946 A1 WO 2006018946A1 JP 2005013299 W JP2005013299 W JP 2005013299W WO 2006018946 A1 WO2006018946 A1 WO 2006018946A1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/36—Microscopes arranged for photographic purposes or projection purposes or digital imaging or video purposes including associated control and data processing arrangements
- G02B21/365—Control or image processing arrangements for digital or video microscopes
- G02B21/367—Control or image processing arrangements for digital or video microscopes providing an output produced by processing a plurality of individual source images, e.g. image tiling, montage, composite images, depth sectioning, image comparison
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
- G02B7/38—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals measured at different points on the optical axis, e.g. focussing on two or more planes and comparing image data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
Definitions
- the present invention relates to an autofocus device for controlling the focus when acquiring an image of a sample, and a microscope apparatus using the autofocus device.
- Patent Document 1 Japanese Patent Laid-Open No. 5-288981
- the present invention has been made to solve the above-described problems, and provides an autofocus device that can accurately determine the in-focus position in a short time, and a microscope device using the autofocus device. For the purpose.
- the autofocus device includes (1) an imaging means for acquiring an image based on an optical image of a sample to be observed, and (2) light from a sample force. And a light guide optical system that guides the optical image of the sample to the imaging means, and (3) changes the focal position of the sample with respect to the image pickup means and the light guide optical system in the optical axis direction.
- the image power of multiple samples acquired in the first focus measurement executed while continuously changing the focus position in one direction.Calculate the first focus measurement value and set the focus position to the first focus. Multiple tests acquired in the second focus measurement performed while continuously changing in the opposite direction to the measurement. It calculates the power of the image the second focal point measurement value, and obtains the focus position in the sample based on the first focal point measurement value and the second focal point measurement value.
- the focal point for acquiring images of a plurality of samples while continuously changing the focal point position is not stopped at every fixed change interval.
- the in-focus position is obtained using a measurement method. This makes it possible to acquire focus information for the observation position of the sample in a short time.
- the focus position is changed twice and the focus measurement is performed twice, and the in-focus position is determined by referring to the focus measurement values calculated for each. .
- the effect of the delay in changing the focus position is reversed in the two focus measurements. Therefore, the final in-focus position can be accurately obtained by using the focus measurement values obtained by calculating the plurality of image forces in the two focus measurements.
- a microscope apparatus controls acquisition of an image of a sample based on the above-described autofocus device and focus information including a focused position obtained by a focus control unit with respect to the observation position of the sample. And image acquisition control means.
- the focus position is changed twice and the focus measurement is performed twice, and the focal position calculated with respect to the observation position of the sample is obtained with reference to the focus measurement values calculated respectively.
- the microscope apparatus is configured using the autofocus apparatus. This makes it possible to accurately obtain the in-focus position when acquiring an image of the sample in a short time, and to execute the sample observation with high accuracy and efficiency.
- the image of a plurality of samples is obtained while continuously changing the focal position by focus measurement for obtaining the in-focus position.
- the focus direction is changed twice and the focus measurement is performed twice, and the in-focus position is obtained by referring to the focus measurement values calculated in each case.
- the in-focus position can be accurately obtained in a short time.
- FIG. 1 is a block diagram showing a configuration of an embodiment of a microscope apparatus using an autofocus device.
- FIG. 2 is a graph showing the in-focus position obtained by focus measurement in one direction.
- Fig. 3 is a graph showing the in-focus position obtained by bidirectional focus measurement.
- FIG. 4 is a graph showing a delay in changing the focus position in focus measurement.
- FIG. 5 is a schematic diagram showing an example of a method of acquiring focus information for the entire observation target region of the sample.
- FIG. 6 is a schematic diagram showing another example of a method for acquiring focus information for the entire observation target region of a sample.
- FIG. 7 is a graph showing a change in straightness error with respect to the stage feed position.
- FIG. 8 is a graph showing a change in straightness error with respect to the stage feed position. Explanation of symbols
- 1A Microscope device, 10 ... Sample stage, 15 ... Stage drive unit, 20 ... Light guiding optical system, 21 ... Objective lens, 25 ... Optical system drive unit, 30 "CCD Camera (imaging device), 50 ... Control equipment 51, focus control unit, 52 ... image acquisition control unit, 55 ... focus information storage unit, 58 ... input device, 59 ... display device.
- CCD Camera imaging device
- FIG. 1 is a block diagram showing a configuration of an embodiment of a microscope apparatus using an autofocus device according to the present invention.
- This microscope apparatus 1A is used for acquiring an image of the sample S.
- the vertical direction that is the optical axis direction in the microscope apparatus 1A is the z-axis direction
- the horizontal direction that is perpendicular to the optical axis is the X-axis direction and the y-axis direction.
- the sample S to be observed by the microscope apparatus 1A is a biological sample, for example, and is placed on the sample stage 10.
- the sample stage 10 is an XY stage that is movable in the X direction and the y direction (horizontal direction). By driving the XY stage 10 in the xy plane, a microscope apparatus 1 A for the sample S is used. The observation position is set or changed. The sample stage 10 is driven and controlled by the XY stage driving unit 15. In this configuration, the XY stage driving unit 15 functions as an observation position changing unit that changes the observation position of the sample S with respect to the microscope apparatus 1A in the direction perpendicular to the optical axis.
- a light guide optical system 20 for guiding a light image of the sample S is provided above the stage 10 with respect to the sample S on the sample stage 10.
- the light guide optical system 20 includes an objective lens 21 on which light from the sample S is incident and an optical element necessary for guiding and focusing the light image of the sample S.
- a CCD camera 30 as an imaging device is installed at a predetermined position on the optical path where the light image of the sample S is guided by the light guide optical system 20.
- the CCD camera 30 is an imaging unit that acquires an image based on an optical image of the sample S.
- the light guide optical system 20 and the CCD camera 30 are integrally fixed with the optical axis and the distance between the optical system 20 and the camera 30 adjusted.
- an optical system drive unit 25 is installed for the light guide optical system 20 and the CCD camera 30. Yes.
- the optical system drive unit 25 is configured using, for example, a stepping motor or a piezoelectric actuator, and moves the optical system 20 and the camera 30 fixed to the optical system 20 in the z-axis direction that is the optical axis direction.
- the optical system driving unit 25 functions as a focus changing unit that changes the focal position of the sample S with respect to the CCD camera 30 and the light guide optical system 20 in the optical axis direction.
- the optical system driving unit 25 is used for controlling the focus in acquiring an image of the sample S.
- a control device 50 having a focus control unit 51 and an image acquisition control unit 52 is installed for the sample stage 10, the light guide optical system 20, and the CCD camera 30.
- the focus control unit 51 uses the CCD camera 30 and the optical system drive unit 25 to acquire focus information including the in-focus position in the image acquisition of the sample S.
- the sample stage 10 the light guide optical system 20, the CCD camera 30 as the imaging means, the stage drive unit 15 as the observation position changing means, and the optical as the focus changing means.
- the system drive unit 25 and the focus control unit 51 of the control device 50 constitute an automatic focus device for acquiring focus information used when acquiring an image of the sample S.
- the focus information acquired by the focus control unit 51 is stored in the focus information storage unit 55.
- the image acquisition control unit 52 determines the in-focus position obtained by the focus control unit 51 with respect to the observation position of the sample S.
- the acquisition of the image of the sample S is controlled based on the included focus information.
- the image acquisition control unit 52 refers to the focus information including the in-focus position read from the focus information storage unit 55, and the CCD camera 30 performs the image acquisition operation of the sample S. Then, the focus change operation by the optical system drive unit 25 and the observation position change operation by the stage drive unit 15 are controlled, and the observation of the sample S and the acquisition of the image are executed under the desired observation conditions.
- the control device 50 including the focus control unit 51 and the image acquisition control unit 52 is configured by a computer including a CPU and a storage device such as a necessary memory and a hard disk, for example.
- An input device 58 and a display device 59 are connected to the control device 50.
- the input device 58 includes, for example, a keyboard and mouse force connected to a computer, and the focus information acquisition operation or the image by the focus control unit 51 in the microscope device 1A. It is used for inputting information, instructions, etc. necessary for execution of an image acquisition operation by the image acquisition control unit 52.
- the display device 59 is configured by, for example, a CRT display or a liquid crystal display connected to a computer, and is used for displaying necessary information regarding focus information acquisition and image acquisition in the microscope device 1A.
- the focus information including the in-focus position in the image acquisition of the sample S is performed by the focus control unit 51 of the control device 50 as described above.
- the focus control unit 51 uses the CCD camera 30, which is an imaging unit, the optical system driving unit 25, which is a focal point changing unit, or the stage driving unit 15, which is an observation position changing unit, if necessary. Execute focus information acquisition for acquisition.
- the focus control unit 51 drives the CCD camera 30 and the light guide optical system 20 in the z-axis direction, which is the optical axis direction, by the optical system driving unit 25, and sets the focal position in the sample S along the z-axis direction. Change continuously. During the continuous change of the focal position, focus measurement is performed to acquire an image of the sample S at every predetermined change interval, and analysis is performed on the obtained plurality of images. In addition, a focus measurement value indicating an in-focus position where the image acquisition focus by the light guide optical system 20 is calculated is calculated.
- the change range of the focus position at which the focus measurement is performed is appropriately set so that the focus position is included in the change range.
- For calculation of focus measurement values using multiple images acquired by the CCD camera 30 over the set focus position change range for example, contrast between multiple images, brightness levels, etc.
- a method is used in which a change in image characteristics is evaluated, and based on the evaluation result, the position where the image acquisition is most focused and calculated as a focus measurement value is used.
- FIG. 2 is a graph showing the in-focus position obtained by focus measurement in one direction.
- the horizontal axis represents the measurement time t in the focus measurement performed while continuously changing the focal position z of the sample S
- the vertical axis represents the focal position z.
- graph A1 shows the focal position that the focus control unit 51 instructs the optical system driving unit 25
- graph A2 shows the actual focal position set by the optical system driving unit 25.
- FIG. 3 is a graph showing the in-focus position obtained by bidirectional focus measurement.
- graph B1 shows the focus position that the focus control unit 51 instructs the optical system drive unit 25
- graph B2 shows the actual focus position set by the optical system drive unit 25. .
- the focus control unit 51 performs the first focus measurement while continuously changing the focus position on the sample S in one direction along the z-axis direction.
- the first focus measurement value is also calculated for the image force of the sample S acquired at predetermined change intervals during that time. At this time, the obtained first focus measurement value has an error due to a delay in changing the focus position, as indicated by an arrow B6 in FIG.
- the focus control unit 51 further executes the second focus measurement while continuously changing the focus position in the sample S in the direction opposite to the first focus measurement along the z-axis direction. In the meantime, the second focus measurement value of the image force of the sample S acquired at every predetermined change interval is calculated. At this time, the obtained second focus measurement value has an error in the opposite direction to the first focus measurement value due to the delay in changing the focus position, as indicated by an arrow B7 in FIG. Yes.
- the focus control unit 51 obtains the in-focus position in the sample S from the average value of the first focus measurement value and the second focus measurement value, as indicated by a broken line BO in FIG.
- the focus position is continuously changed by the optical system driving unit 25 that does not stop the change of the focus position in the sample S at every fixed change interval.
- the focal position is obtained using a focus measurement method in which images of a plurality of samples S are acquired by the CCD camera 30 while changing. Thereby, it is possible to acquire the focus information for the observation position of the sample S in a short time.
- the focus position change direction with respect to the optical axis direction is changed, and the focus measurement is performed twice.
- the in-focus position is obtained with reference to the calculated focus measurement value.
- the error of the focus measurement value due to the influence of the delay in changing the focus position is in the reverse direction. Therefore, the final in-focus position can be accurately obtained by using the first and second focus measurement values obtained by calculating the plurality of image forces in each of the first and second focus measurements.
- the in-focus position for acquiring the image of the sample S can be accurately obtained in a short V and time, and the sample S can be efficiently obtained with high accuracy. It becomes possible to carry out observations.
- the effects of the autofocus device and the microscope device 1A will be described in detail.
- the delay of the focal position changing operation due to this is a few tens of ms: about LOOms (milliseconds).
- the focus control unit The focal position instructed by 51 and the actual focal position set by the optical system driving unit 25 are shifted by 3 images in terms of the number of images. Such image shift is further increased by using an imaging device having a high frame rate. According to the above-described apparatus configuration and focus information acquisition method, the influence of such image shift can be eliminated by performing focus measurement in both directions.
- the frame rate of image acquisition is 30 Hz
- the number of images acquired for focus measurement is 30 for one direction.
- the time required for bidirectional focus measurement is 2 seconds.
- Figure 4 is a graph showing the delay in changing the focus position in focus measurement.
- a graph C1 indicates a focus position instructed by the focus control unit 51 to achieve a predetermined change speed
- a graph C2 indicates an actual focus position set by the optical system driving unit 25.
- Graph D1 shows the focus position indicated by the focus control unit 51 so that the change speed is slower than the change speed in the graph C1
- the graph D2 shows the actual focus position set by the optical system drive unit 25. Is shown.
- the delay in changing the focal point position at Dl and D2 when the change speed is set slow is the change at Cl and C2 when the change speed is set fast. Smaller than the delay.
- the focus position change delay in focus measurement and the error that occurs in the focus measurement value vary depending on the specific conditions of focus measurement such as the focus position change speed. Such a difference in error also occurs due to, for example, the type of equipment used in the optical system driving unit 25, individual characteristics, or changes in apparatus characteristics over time.
- the focus information acquisition method described above uses a method that performs two focus measurements and cancels the influence of the delay in changing the focus position, it is related to the uncertainty of such errors. Therefore, it is possible to reliably obtain the in-focus position.
- the focus measurement is performed under the same conditions with respect to the conditions other than the change direction of the focus position, for example, the change range of the focus position, the change interval, etc. in the two focus measurements. It is preferable. Alternatively, conditions other than the changing direction of the focal position may be set to different conditions.
- the focus position on the sample S in the first focus measurement and the second focus measurement With respect to the change interval it is preferable to acquire a plurality of images used for calculation of the focus measurement value by acquiring the image of the sample S for each change interval of the focus position set to the depth of field or less. .
- the in-focus position with respect to the observation position of the sample S can be obtained with sufficiently high accuracy.
- NA the numerical aperture of the objective lens 21 used in the light guide optical system 20
- NA It is about 0.5 m at 0.7.
- the focal position changing interval for example, a method of setting the changing interval with half the depth of field can be used.
- the focal position change interval may be set larger than the depth of field in accordance with the required focal position accuracy.
- the derivation of the in-focus position using the first focus measurement value and the second focus measurement value is based on the average value of the first and second focus measurement values. It is preferable to determine the position. In the first and second focus measurements in which the direction of change of the focal position is reversed, the direction of the delay in changing the focal position is usually reverse and the magnitude is approximately equal. Therefore, by setting the average value of the first and second focus measurement values as the in-focus position as described above, the in-focus position in a state where the influence of the delay in changing the focus position has been canceled can be easily and reliably obtained. Can be sought.
- the method for deriving the in-focus position a method other than the specific focus measurement method and the method for setting the average value to the in-focus position according to the characteristics of the equipment used to change the focus position, etc. May be used.
- the imaging unit that acquires the image of the sample S acquires the focus information by the focus control unit 51 and the image acquisition control unit 52 acquires the image of the sample S.
- a different imaging device may be used.
- two optical paths, a focus control optical path and an image acquisition optical path, are set, and an imaging apparatus for focus control and an image acquisition apparatus for image acquisition are installed on each optical path.
- the structure to be used can be used.
- a configuration may be adopted in which an imaging device for focus control and an imaging device for image acquisition are switched and installed on a single optical path.
- an image sensor such as a CCD camera capable of acquiring a two-dimensional image of the sample S as the imaging device for focus control.
- an imaging device for image acquisition a linear sensor that can acquire a one-dimensional image of the sample S or an image sensor that can acquire a two-dimensional image can be used.
- a linear sensor (line sensor) or TDI operation can be used as an imaging device for image acquisition.
- TDI operation can be used as an imaging device for image acquisition.
- a two-dimensional image sensor or the like In the configuration shown in FIG. 1, a CCD camera capable of both a normal two-dimensional image acquisition operation and a TDI line sensor operation may be used as the CCD camera 30.
- an XY stage movable in the xy plane is used as the sample stage 10, and an XY stage driving unit 15 is provided for the stage 10.
- the observation position with respect to the sample S can be adjusted in the xy plane.
- the observation position on the sample S is set perpendicular to the optical axis in the xy plane by the XY stage driving unit 15. It is possible to change the direction.
- the focus control unit 51 when acquiring an image of the sample S for a certain observation target region, as a method of acquiring focus information for the entire observation target region, the focus control unit 51 observes the sample S.
- FIG. 5 is a schematic diagram showing an example of a method for acquiring focus information for the entire observation target region of the sample.
- the sample S is scanned over a wide range using the microscope apparatus 1A to acquire image data
- the change in the focal position in the observation target region due to the tilt of the sample stage 10 or the shape of the sample S becomes a problem.
- the observation area is small
- the change in the focal position is not a problem even when the image of the sample S is acquired at multiple observation positions.
- the observation target region R is divided into a plurality of focus measurement regions.
- 10 ⁇ 10 focus measurement regions RF are set by dividing the rectangular observation target region R into 10 in the horizontal direction and 10 in the vertical direction. Then, by performing focus measurement for each of the 100 focus measurement areas RF by obtaining the focus position by the method described above, mapping data of the focus position with respect to the entire observation target area R can be created. According to such a method, it is possible to efficiently acquire focus information such as a focal point position with respect to the observation target region R including a plurality of observation positions.
- the classification conditions such as the number of divisions of the observation target region R into the focus measurement region RF are appropriate depending on the specific size of the observation target region R and the accuracy of the required focus information. Set it.
- the central point of the focus measurement region RF is the representative point RC, and this representative point RC is used as the measurement position to focus. It is preferable to perform measurement and derivation of the in-focus position.
- the image acquisition control unit 52 performs mapping data of focus information stored in the focus information storage unit 55.
- the image of sample S can be obtained by scanning the image and scanning the observation area R while referring to the data.
- FIG. 5 shows an example of a method for acquiring the image of the sample S in the observation target region R.
- an image scan from the upper side to the lower side in the figure (solid arrow) is repeated from the left side to the right side (dashed arrow) in the observation target region R, and the sample is applied to the entire area scale.
- Get S images In this case, refer to the mapping data of the focus information and acquire the image while adjusting the focus position so as to follow the image scan in the observation target region R. You can get a good image.
- the focus control unit 51 sets three or more focus measurement positions in the observation target region of the sample S, obtains the focus position for each of the three or more focus measurement positions, and determines the focus positions. It is preferable to use a method of obtaining a focal point position for each observation position in the observation target region.
- FIG. 6 is a schematic diagram showing another example of a method for acquiring focus information for the entire observation target region of the sample.
- three focus measurement positions PF are set for the observation target region R as described above.
- focus measurement is performed by the above-described method to determine the in-focus position!
- the in-focus position with respect to an arbitrary observation position in the observation target region R can be obtained by linear interpolation from the in-focus positions obtained at the three focus measurement positions PF.
- the straightness of the XY stage is such as the eccentricity of the ball screw used to move the stage, the straightness of the guide itself (for example, the warp of the rail on which the stage moves), the flatness of the base part to which the guide is attached, and the guide mounting.
- the stage may not move linearly due to the effects of undulations due to the screw fixing of the screw and vibration associated with the passing of rolling elements when the guide is a ball circulation type.
- FIG. 7 and FIG. 8 are each a diagram showing changes in straightness error with respect to the stage feed position.
- the graph in Figure 7 shows the change in straightness error over a wide feed position range. Yes. This mainly corresponds to the error pattern due to the warp of the rail on which the stage moves.
- the graph in Fig. 8 shows the change in straightness error for a narrow feed position range. This mainly corresponds to an error pattern due to a feeding screw.
- the automatic focusing apparatus and the microscope apparatus 1A described above it is possible to simultaneously correct the straightness of such a stage by acquiring the focus information by focus measurement.
- the autofocus device and the microscope device according to the present invention are not limited to the above-described embodiments and configuration examples, and various modifications are possible.
- focus changing means for changing the focal position of the sample S relative to the imaging means and the light guide optical system in the optical axis direction!
- the CCD camera 30 and the light guide optical system are used.
- Force using the optical system drive unit 25 that drives 20 in the z-axis direction.Other configurations such as a configuration in which the sample stage 10 on which the sample S is mounted are driven in the z-axis direction may be used! ,.
- the observation position changing means for changing the observation position (imaging position) in the sample S in the direction perpendicular to the optical axis is the XY stage that drives the sample stage 10 in the xy plane in the configuration shown in FIG.
- other configurations such as a configuration in which the CCD camera 30 and the light guide optical system 20 are driven in the xy plane may be used.
- such an observation position changing means is not provided if it is not necessary, such as when acquiring an image with respect to the sample S at only one observation position.
- the autofocus device includes (1) imaging means for acquiring an image based on an optical image of a sample to be observed, and (2) an objective lens on which light from the sample force is incident, A light guide optical system that guides the optical image of the light to the image pickup means, and (3) a focus change means that changes the focal position of the sample relative to the image pickup means and the light guide optical system in the optical axis direction, and (4) A focus control means for acquiring focus information when acquiring an image of the sample using the imaging means and the focus change means, and (5) the focus control means continuously moves the focus position in one direction by the focus change means.
- the image power of multiple samples acquired in the first focus measurement performed while changing to the first focus measurement value is calculated, and the focus position is continuously changed in the opposite direction to the first focus measurement.
- the image power of multiple samples acquired in the second focus measurement performed while calculating the second focus measurement value Both focus points on the sample based on the first and second focus measurements. I prefer to find the position!
- the focus control means obtains the in-focus position from an average value of the first focus measurement value and the second focus measurement value. In this case, the in-focus position in a state where the influence of the delay in changing the focal position has been canceled can be reliably obtained.
- other methods may be used depending on the specific focus measurement method for determining the in-focus position.
- the focus control means acquires images of a plurality of samples at every focus position change interval set to a depth of field or less. This is preferred. In this case, the in-focus position with respect to the observation position of the sample can be obtained with sufficiently high accuracy.
- the automatic focusing device includes observation position changing means for changing the observation position of the sample with respect to the imaging means and the light guide optical system in a direction perpendicular to the optical axis, and the focus control means includes the observation target region of the sample. May be divided into a plurality of focus measurement areas, and the in-focus position may be mapped to the observation target area based on the in-focus positions obtained for each of the plurality of focus measurement areas.
- the automatic focusing apparatus includes observation position changing means for changing the observation position in the sample with respect to the imaging means and the light guide optical system in a direction perpendicular to the optical axis, and the focus control means includes the observation target region of the sample.
- observation position changing means for changing the observation position in the sample with respect to the imaging means and the light guide optical system in a direction perpendicular to the optical axis
- the focus control means includes the observation target region of the sample.
- 3 or more focus measurement positions are set, and for each of the 3 or more focus measurement positions, the in-focus position for each observation position in the observation target area is obtained using the in-focus position obtained. It's also good.
- the microscope apparatus controls the acquisition of the image of the sample based on the above-described automatic focus apparatus and focus information including the in-focus position obtained by the focus control unit with respect to the observation position of the sample. It is preferable to include an image acquisition control unit.
- the automatic focusing apparatus and the microscope apparatus according to the present invention shorten the in-focus position! It can be used as an autofocus device that can be obtained and a microscope device using it.
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Application Number | Priority Date | Filing Date | Title |
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US11/658,499 US20080283722A1 (en) | 2004-07-28 | 2005-07-20 | Autofocus Device and Microscope Using the Same |
EP05762016A EP1775617A4 (en) | 2004-07-28 | 2005-07-20 | AUTOMATIC FOCUSING DEVICE AND MICROSCOPE COMPRISING SAID DEVICE |
AU2005273421A AU2005273421A1 (en) | 2004-07-28 | 2005-07-20 | Autofocus device and microscope using the same |
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JP2004220718A JP2006039315A (ja) | 2004-07-28 | 2004-07-28 | 自動焦点装置及びそれを用いた顕微鏡装置 |
JP2004-220718 | 2004-07-28 |
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EP (1) | EP1775617A4 (ja) |
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HU0800686D0 (en) * | 2008-11-17 | 2009-01-28 | Femtonics Kft | Laser scanning microscope |
EP3764085A3 (en) * | 2008-10-24 | 2021-03-24 | Leica Biosystems Imaging Inc. | Whole slide fluorescence scanner |
US9229207B2 (en) * | 2008-11-17 | 2016-01-05 | Femtonics Kft | Laser scanning microscope with focus-detecting unit |
BRPI1011689B1 (pt) | 2009-03-11 | 2019-12-17 | Sakura Finetek Usa Inc | método de autofocalização e dispositivo de autofocalização |
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Also Published As
Publication number | Publication date |
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US20080283722A1 (en) | 2008-11-20 |
AU2005273421A1 (en) | 2006-02-23 |
EP1775617A1 (en) | 2007-04-18 |
EP1775617A4 (en) | 2010-07-28 |
JP2006039315A (ja) | 2006-02-09 |
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