WO2019053768A1 - 顕微鏡および観察方法 - Google Patents
顕微鏡および観察方法 Download PDFInfo
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- WO2019053768A1 WO2019053768A1 PCT/JP2017/032817 JP2017032817W WO2019053768A1 WO 2019053768 A1 WO2019053768 A1 WO 2019053768A1 JP 2017032817 W JP2017032817 W JP 2017032817W WO 2019053768 A1 WO2019053768 A1 WO 2019053768A1
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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
- G02B21/0056—Optical details of the image generation based on optical coherence, e.g. phase-contrast arrangements, interference arrangements
-
- 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
- G02B21/0032—Optical details of illumination, e.g. light-sources, pinholes, beam splitters, slits, fibers
-
- 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
- G02B21/0068—Optical details of the image generation arrangements using polarisation
-
- 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
- G02B21/0072—Optical details of the image generation details concerning resolution or correction, including general design of CSOM objectives
-
- 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
-
- 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
- G02B21/008—Details of detection or image processing, including general computer control
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/58—Optics for apodization or superresolution; Optical synthetic aperture systems
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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
Definitions
- a beam splitting unit for splitting light from a light source into a plurality of beams, and generated by interference of at least a portion of the beams of the plurality of beams split by the beam splitting unit
- Detection system that includes an illumination optical system that scans a sample in a plurality of directions by interference fringes, a detection optical system that receives light from the sample, and a plurality of detection units that detect light from the sample via the detection optical system
- a microscope is provided that includes an apparatus and an image processing unit that generates an image using detection results of two or more detection units of the detection apparatus.
- FIG. 21 is a diagram showing a region of frequency space used for component separation in the sixth embodiment. It is a figure which shows the microscope which concerns on 7th Embodiment. It is a figure which shows the microscope which concerns on 8th Embodiment. It is a figure which shows the mask which concerns on 8th Embodiment, and the polarization state of excitation light. It is a figure which shows the area
- Stage 2 holds the sample S to be observed.
- the sample S is, for example, a cell fluorescently stained in advance.
- the sample S contains a fluorescent substance such as a fluorescent dye.
- the light source 3 emits excitation light L1 for exciting a fluorescent substance contained in the sample S.
- the illumination optical system 4 scans the sample S with interference fringes L2 of the excitation light L1 in a plurality of directions (eg, X direction, Y direction).
- the illumination optical system 4 two-dimensionally scans the sample S with the interference fringe L2.
- the detection optical system 5 is disposed at a position where the fluorescence L3 from the sample S (shown later in FIG. 4) is incident.
- the detection device 6 includes a plurality of detection units 6a (shown later in FIG.
- the collimator lens 12 converts the excitation light L1 emitted from the optical fiber 11 into parallel light.
- the collimator lens 12 is disposed, for example, such that the focal point on the same side as the light source 3 coincides with the light exit of the optical fiber 11.
- the focal point on the same side as the light source 3 will be referred to as the back focal point
- the focal point on the same side as the sample S will be referred to as the front focal point.
- the image processing unit 7 generates an image based on the detection result of the detection device 6 obtained as described above.
- the processing performed by the image processing unit 7 will be described below.
- the coordinate system is described as a vector as appropriate.
- the distribution of the fluorescent substance in the sample S is represented by Obj (r)
- the image data obtained by the detection device 6 is represented by I (r, r s ).
- I (r, r s ) is represented by the following formula (3).
- the effective PSF (solid line) of each detection unit 6a is shown in one graph for three detection units 6a whose coordinates in the Xb direction are different from each other.
- the graph in the center of FIG. 5A shows the distribution Q1a (solid line) corresponding to the effective PSF of the detection unit 6a arranged at the position X1a.
- the graph on the left side of FIG. 5A shows the distribution Q1b (solid line) corresponding to the effective PSF of the detection unit 6a arranged at the position X1b.
- the graph on the right side of FIG. 5A shows a distribution Q1c (solid line) corresponding to the effective PSF of the detection unit 6a disposed at the position X1c.
- a distribution Q3b illustrated in the graph on the left side of FIG. 5A is a distribution corresponding to the detection unit 6a disposed at the position X1b among the plurality of detection units 6a.
- the distribution Q3b is a maximum (peak) at a position X1b (for example, the central position of the light receiving area of the detection unit 6a) at which the detection unit 6a is disposed.
- the position X1b is offset from the peak position X2b of the partial distribution Q2b including the position X1b in the distribution Q2 corresponding to the intensity distribution of the interference fringe L2.
- the peak position of the main lobe of the distribution Q1b of the effective PSF is offset from the center position (the position of X2a, the position of the optical axis of the detection optical system) of the detection device 6.
- the position (r) of the detection unit 6a of the detection device 6 also shifts the position of the main lobe of the effective PSF.
- the displacement of the position of the main lobe of the effective PSF is referred to as the displacement of the effective PSF.
- the distribution Q1c corresponding to the effective PSF is a distribution obtained by multiplying the distribution Q2 corresponding to the intensity distribution of the interference fringe L2 and the distribution Q3c corresponding to the detected PSF of the detection unit 6a disposed at the position X1c.
- the image processing unit 7 uses the detection result of the detection unit 6a selected from the plurality of detection units 6a based on the magnification of the detection optical system 5 and the cycle (fringe interval) of the interference fringe L2.
- the image processing unit 7 selects the detection unit 6a from the plurality of detection units 6a based on the peak position (for example, peak positions X2a, X2b, and X2c in FIG. 5) of the interference fringe L2, and the detection result of the selected detection unit 6a
- the peak position of the interference fringe L2 corresponds to, for example, the position at which the intensity is maximal (for example, the center position of the bright portion) in the intensity distribution of the interference fringe L2.
- the image processing unit 7 may use only the detection result of the one detection unit 6a disposed at the position X1a as the detection result on the partial distribution Q2a including one peak in the intensity distribution of the interference fringe L2.
- the detection results of the detection unit 6a disposed at the position X1a and at least one detection unit 6a around the detection unit 6a may be used.
- FIG. 6 is a flowchart showing the observation method according to the embodiment.
- the illumination optical system 4 of FIG. 1 sets the angle of the scanning mirror.
- the illumination optical system 4 irradiates excitation light as interference fringes on the position on the sample determined by the angle of the scanning mirror set in step S1.
- the fluorescent substance of the sample is excited by the interference fringes of the excitation light.
- the detection device 6 of FIG. 4 detects the fluorescence L3 from the sample S via the detection optical system 5.
- step S4 the microscope 1 (for example, the control unit) determines whether to change the angle of the scanning mirror.
- the microscope 1 determines that the process from step S1 to step S3 is not completed for a part of the planned observation area, it determines to execute the angle change of the scanning mirror in step S4 (step S4; Yes) .
- the microscope 1 determines that the angle change of the scanning mirror is to be performed (Step S4; Yes)
- the process returns to Step S1, and the illumination optical system 4 sets the angle of the scanning mirror to the predetermined next angle.
- the processing from step S2 to step S4 is repeated.
- the illumination optical system 4 two-dimensionally scans the sample S with the interference fringes of the excitation light L1.
- the microscope 1 scans the interference fringes L2 two-dimensionally by scanning the interference fringes L2 in two directions parallel to the sample surface Sa.
- the microscope 1 according to the embodiment may three-dimensionally scan the interference fringe L2 by scanning the interference fringe L2 in two directions parallel to the sample surface Sa and one direction perpendicular to the sample surface Sa (When the interference fringe L2 is scanned three-dimensionally, the process of scanning the interference fringe L2 in two directions parallel to the sample surface Sa (hereinafter referred to as two-dimensional process) is the same as the process described in the above embodiment.
- the microscope 1 can generate, for example, a three-dimensional super-resolution image by repeating the two-dimensional processing with changing the position in the Z direction.
- the interference fringes L2 may be scanned three-dimensionally.
- a (k s ) is the apodization function for suppressing the negative value of the image, called a apodization to applying the A (k s) to Obj ⁇ (r, k s) .
- the functional form of A (k s ) is designed to suppress the negative value of the image by theoretical calculation or simulation.
- F ks -1 is an inverse Fourier transform of k s .
- the image processing unit 7 performs the inverse Fourier transform after adding the spectra of the detection units 6a, but the images may be added after performing the inverse Fourier transform.
- FIG. 8 is a flowchart showing the observation method according to the second embodiment.
- the processing from step S1 to step S4 is the same as that of FIG.
- the image processing unit 7 Fourier-transforms the detection result of each detection unit.
- the image processing unit 7 executes deconvolution.
- the image processing unit 7 executes apodization. Apodization may be part of deconvolution processing.
- the image processing unit 7 adds the images for each of the detection units 6a using the result of deconvolution.
- the image processing unit 7 generates a second image (eg, super-resolution image) by performing inverse Fourier transform on the first image (eg, Fourier image) obtained in step S14.
- a second image eg, super-resolution image
- the image processing unit 7 may change the range of the detection unit 6a to be added, as described in the first embodiment. In addition, as described in the first embodiment, the image processing unit 7 may improve the resolution one-dimensionally or two-dimensionally.
- the image processing unit 7 corrects the deformation of the shape of the effective PSF for each detection unit 6a by image processing different from that of the second embodiment.
- FIG. 9A shows a PSF before image processing according to the present embodiment, which is the same as FIG. 5A.
- the distance between the detection units 6a of the detection device 6 does not match the distance between the interference fringes L2.
- the effective PSF (solid line) of the image obtained for each detection unit 6a is broken in shape depending on the position of the detector 6a.
- the distribution Q2g shifts the phase of the distribution Q2 so that the peak position X2c of the distribution Q2c of FIG. 9A matches the position X1c of the detection unit 6a. It is a distribution.
- the peak position X2g of the distribution Q2g substantially coincides with the position X1c of the detection unit 6a.
- the code Q1g is a distribution corresponding to the effective PSF obtained from the distribution Q2g whose phase is shifted and the detection PSF (distribution Q3c) of the detection unit 6a arranged at the position X1c. In the distribution Q1g, the collapse of the shape of the effective PSF is reduced.
- ⁇ indicates the initial phase of the interference fringe L2.
- the image processing unit 7 changes the phase of the interference fringe L2 according to the detector coordinates by image processing to make the shape of the effective PSF uniform.
- the microscope 1 acquires four-dimensional image data I (r, r s ) as described in the equation (3).
- the image processing unit 7 performs four-dimensional Fourier transform on I (r, r s ).
- the four-dimensional data in the frequency space obtained by the Fourier transform expressed by I ⁇ (k, k s) .
- the image processing unit 7, the I ⁇ (k, k s) extracts the information of one of satisfying area of formula (15) from the following equation (13).
- a region satisfying the condition of equation (13) is referred to as a zeroth-order component region AR1a
- a region satisfying the condition of equation (14) is referred to as a + 1st-order component region AR1b
- a condition of equation (15) The region to be filled in is referred to as a region AR1 c of -1st order component.
- the image processing unit 7 performs the processing shown in the above equations (16) and (17) on the result of the component separation and the inverse Fourier transform.
- the phase of the interference fringe L2 is shifted according to the detector coordinate r. Shift amount of the phase of the interference fringes, for example, as the peak of the peak position and the interference fringes of the resulting function by the product of PSF det (r + r s) and PSF ill (r s) is matched approximately, it is determined Ru.
- the value of the initial phase ⁇ may be a value previously measured using fluorescent beads, or may be a value estimated from an observation image.
- the image processing unit 7 determines the amount of phase conversion (phase shift amount) based on the light intensity distribution of the excitation light in the sample S.
- the image processing unit 7 determines the phase shift amount based on the electric field intensity ill (r) of the excitation light on the sample surface Sa as the light intensity distribution of the excitation light in the sample S.
- PH (r) is a pinhole function defined by the following equation (23).
- OTF 0 (k, k s ), OTF +1 (k, k s ), and OTF ⁇ 1 (k, k s ) are represented by the following Expression (26).
- an interference fringe L2 is formed by combining the interference fringe due to the interference of the excitation light L1c and the interference fringe due to the interference of the excitation light L1d. Since the polarization directions of the excitation light L1c and the excitation light L1d are almost orthogonal to each other, the interference between the excitation light L1c and the excitation light L1d is suppressed.
- FIG. 20 is a diagram illustrating a pupil conjugate surface and a region of a frequency space used for component separation according to the eighth embodiment.
- the pupil conjugate plane P1 is expressed in a wave number coordinate space.
- K NA ex (circle drawn by a dotted line) shown in FIG. 20A is the pupil radius of the objective lens 21.
- the area AR2a and the area AR2b in which the excitation light L1c is incident, and the area AR2c and the area AR2d in which the excitation light L1d is incident are circular, respectively, but are not limited to the circle.
- the radius of each of the areas ARa to ARd is ⁇ k NA ex .
- the electric field strength ill (r) at the sample surface Sa is expressed by the following equation (35).
- k 0 x and k 0 y are wave number vectors of the interference fringe L2, respectively.
- the illumination pupil has four poles, and the interference fringes in the periodic direction are the X direction and the interference fringes in the Y direction are the sum of the interference fringes in the Y direction.
- Image data I (r, r s ) obtained by the detection device 6 is expressed by the following equation (36).
- the image processing unit 7 four-dimensionally Fourier-transforms I (r, r s ) in equation (36) with respect to r and r s as shown in the following equation (37).
- I 0 to (k, k s ) is referred to as a zero-order component
- I to +1, x (k, k s ) is referred to as a +1 order component in the X direction
- I to -1, x (k, k We call s 1) the ⁇ 1st order component in the X direction
- I 1 to +1, y (k, k s ) is referred to as a + 1st order component in the Y direction
- I 1 to -1, y (k, k s ) is referred to as a -1st order component in the Y direction.
- the code AR3a is an area where data of the 0th order component exists (hereinafter referred to as an area of the 0th order component).
- the code AR3b is an area in which data of the + 1st order component in the X direction is present (hereinafter referred to as an area of the + 1st order component in the X direction).
- the code AR3c is an area where data of a -1st order component in the X direction is present (hereinafter referred to as an area of a -1st order component in the X direction).
- the code AR3 d is an area where data of + 1st order component in the Y direction is present (hereinafter referred to as an area of + 1st order component in the Y direction).
- the code AR3e is an area where data of -1st order component in the Y direction exists (hereinafter referred to as an area of -1st order component in the Y direction).
- the region AR3e of the ⁇ 1st order component in the Y direction is expressed by the following equation (44).
- the image processing unit 7 calculates data of each component in the real space by performing inverse Fourier transform on each extracted component.
- the zero-order component in the real space is represented by I 0 (r, r s )
- the + 1st- order component in the X direction in the real space is represented by I +1 , x (r, r s ).
- the primary component is represented by I -1, x (r, r s ).
- the + 1st order component in the Y direction in real space is represented by I +1 , y (r, r s )
- the ⁇ 1st order component in the Y direction in real space is represented by I ⁇ 1, y (r, r s ).
- the image processing unit 7 uses the at least a part of the data of each component in the real space obtained as described above to match the detector coordinates so that the effective PSFs for each of the detection units 6a of the detection device 6 are aligned. Shift the phase of the interference fringes.
- the image processing unit 7 calculates the + 1st component in the X direction, the ⁇ 1st component in the X direction, the + 1st component in the Y direction, and the ⁇ 1st component in the Y direction according to the following equation (45). Shift the phase for each of
- ⁇ x (r) is the amount of phase shift for each of the + 1st order component and the ⁇ 1st order component in the X direction.
- y y (r) is a phase shift amount for each of the + 1st order component and the ⁇ 1st order component in the Y direction.
- Phase shift amount of the is, for example, is set so that the peak position of the function obtained by the product of PSF det and (r + r s) and PSF ill (r s), and the peak position of the interference fringes L2 matches Ru.
- the image processing unit 7 adds the respective components as shown in the following equation (46).
- region used for component separation is not limited to the area
- the area used for component separation may be larger or smaller than the area shown in the above formulas (41) to (44).
- at least one of the openings 38a and 38b of the mask 38 and the openings 40a and 40b of the mask 40 may not be circular.
- the region used for component separation can be determined by numerical simulation, theoretical calculation or the like for any of the cases where the opening of the mask has a shape other than the circular shape when the opening of the mask is circular.
- the process performed by the image processing unit 7 may be any of the processes described in the first to fourth embodiments.
- the deconvolution in the frequency space described in the fourth embodiment although there are three components in the above equation (27), the zeroth order component, the + 1st order component in the X direction, The five components of the ⁇ 1st order component in the X direction, the + 1st order component in the Y direction, and the ⁇ 1st order component in the Y direction may be used.
- FIG. 21 is a view showing a microscope according to a ninth embodiment.
- the microscope 1 includes the ⁇ / 2 wavelength plate 30 and the optical path rotating unit 31 described with reference to FIG.
- the optical path rotation unit 31 is driven by the drive unit 32 and rotates around the optical axis of the illumination optical system 4.
- the optical path rotation unit 31 rotates, the optical path of the excitation light L1c and the optical path of the excitation light L1d rotate around the optical axis of the illumination optical system 4, respectively.
- the periodic direction of the interference fringes L2 formed on the sample surface Sa rotates around the Z direction.
- FIG. 22 is a view showing a polarization state of excitation light according to the ninth embodiment.
- the area AR4a on which the excitation light L1c is incident on the pupil plane P0 is aligned in the X direction.
- the area AR4b and the area AR4b on which the excitation light L1d is incident on the pupil plane P0 are aligned in the Y direction.
- FIG. 22B corresponds to a state in which the dove prism (optical path rotating portion 31 in FIG. 21) and the ⁇ / 2 wavelength plate 30 are rotated by 22.5 ° from the state in FIG.
- the region AR4a on which the excitation light L1c is incident on the pupil plane P0 is aligned in the direction rotated 45 ° from the X direction.
- the periodic direction of the interference fringes of the excitation light L1c on the sample surface Sa is rotated 45 ° from the X direction.
- the area AR4b on which the excitation light L1d is incident on the pupil plane P0 is aligned in the direction rotated 45 ° from the Y direction.
- the periodic direction of the interference fringes of the excitation light L1d on the sample surface Sa is rotated 45 ° from the Y direction.
- the detection device 6 detects fluorescence L3 from the sample S before and after the periodic direction of the interference fringe L2 is changed.
- the image processing unit 7 generates an image based on the detection result of the detection device 6 before the change of the periodic direction of the interference fringe L2 and the detection result of the detection device 6 after the change of the periodic direction of the interference fringe L2.
- the optical path rotation unit 31 may be disposed in the optical path between the dichroic mirror 16 and the detection device 6 as described with reference to FIG.
- the microscope 1 changes the periodic direction of the interference fringes L2 by the optical path rotating unit 31, but the fringe direction changing unit that changes the periodical direction of the interference fringes L2 is also different from the optical path rotating unit 31. Good.
- FIG. 23 is a view showing a microscope according to a tenth embodiment.
- FIG. 24 is a view showing a mask according to the tenth embodiment.
- the microscope 1 includes a drive unit 45 and a drive unit 46.
- the mask 38 is rotatable around the optical axis of the excitation light L1 c.
- the mask 38 is driven by the drive unit 45 to rotate (see FIG. 24A). In FIG. 24A, the mask 38 is rotated 45 degrees clockwise.
- the mask 40 is rotatable around the optical axis of the excitation light L1d.
- the mask 40 is driven by the drive unit 46 to rotate (see FIG. 24B).
- the drive unit 46 rotates the mask 40 by the same angle as the drive unit 45 rotates the mask 38.
- the mask 40 is rotated 45 degrees clockwise.
- the periodic direction of the interference fringes L2 on the sample surface Sa is rotated 45 ° around the Z direction.
- a ⁇ / 2 wavelength plate 48 is provided in the light path between the polarization separation element 41 and the dichroic mirror 16.
- the ⁇ / 2 wavelength plate 48 is driven by the drive unit 49 and rotates around the optical axis of the illumination optical system 4.
- the ⁇ / 2 wavelength plate 48 and the drive unit 49 adjust the excitation light L1 c and the excitation light L1 d so as to be incident on the sample S with S polarization.
- FIG. 25 is a view showing a microscope according to an eleventh embodiment.
- the microscope 1 includes a relay optical system 47.
- the relay optical system 47 is a part of the illumination optical system 4 and a part of the detection optical system 5.
- the relay optical system 47 is disposed in the optical path between the deflection mirror 18 a and the deflection mirror 18 b in the scanning unit 18.
- the deflection mirror 18 a is disposed at substantially the same position as the first pupil conjugate plane optically conjugate with the pupil plane P 0 of the objective lens 21.
- the scanning part 18 is not limited to the above-mentioned form.
- the stage 2 may include a Y stage that moves in the Y direction with respect to the objective lens 21, and the scanning unit 18 may include a Y stage instead of the deflection mirror 18b.
- the scanning unit 18 may scan the sample S in the X direction with the excitation light L1 by the deflection mirror 18a, and scan the sample S in the Y direction with the excitation light L1 by moving the Y stage.
- the deflection mirror 18 a may be disposed at substantially the same position as the pupil conjugate plane optically conjugate with the pupil plane P 0 of the objective lens 21.
- the stage 2 includes an X stage moving in the X direction with respect to the objective lens 21 and a Y stage moving in the Y direction with respect to the objective lens 21.
- the scanning unit 18 includes the X stage and the Y stage described above. May be included. In this case, the scanning unit 18 may scan the sample S in the X direction with the excitation light L1 by the movement of the X stage described above, and scan the sample S in the Y direction with the excitation light L1 by the movement of the Y stage described above .
- the scanning direction in which the sample S is scanned with interference fringes is two directions of the X direction and the Y direction, and the illumination optical system 4 two-dimensionally scans the sample S with interference fringes.
- the scanning direction in which the sample S is scanned with the interference fringes may be three directions of the X direction, the Y direction, and the Z direction.
- the microscope 1 performs 2D processing to acquire a 2D image by scanning the sample S with interference fringes in the X direction and Y direction, and repeats the 2D processing by changing the position in the Z direction at which interference fringes are generated
- the sample S may be three-dimensionally scanned with interference fringes.
- the microscope 1 may three-dimensionally scan the sample S with interference fringes to acquire a plurality of 2D images different in position in the Z direction and generate a 3D image (eg, Z-stack).
- the illumination optical system 4 may scan in the X direction and the Y direction, and may scan in the Z direction by the movement of the stage 2.
- the illumination optical system 4 may scan the sample S three-dimensionally with interference fringes.
- the illumination pupil has a form in which the illumination pupil having the shape shown in FIG. 26B has four poles.
- the illumination pupil has a form in which the illumination pupil of the shape shown in FIG. 26C has four poles.
- the number of the plurality of regions (number of poles) on which the excitation light is incident is set to an arbitrary number of 2 or more.
- the shape of one of the plurality of regions on the pupil plane P0 where the excitation light is incident may be different from the shape of the other regions.
- the diffraction grating 53 splits the excitation light L1 into a plurality of light beams by diffraction.
- the diffraction grating 53 is a beam splitting unit that splits the excitation light that excites the fluorescent material into a plurality of beams.
- the diffraction grating 53 is disposed within the focal point of the lens 52 or within 1 mm near the focal point. That is, the diffraction grating 53 is disposed within a plane conjugate with the sample surface Sa or within 1 mm in the vicinity thereof.
- the plurality of light fluxes described above include 0th order diffracted light, + 1st order diffracted light, and -1st order diffracted light.
- the fast axis of the ⁇ / 4 wavelength plate 61 is set to a direction rotated 45 ° counterclockwise in the X direction when viewed from the + Z side.
- the excitation light L1 passing through the ⁇ / 4 wavelength plate 61 becomes circularly polarized light and is incident on the mask 15.
- the excitation light L1 passing through the opening 15a and the opening 15b of the mask 15 is circularly polarized light, and is incident on the ⁇ / 4 wavelength plate 62.
- the fast axis of the ⁇ / 4 wavelength plate 62 is set to a direction rotated clockwise by 45 ° in the X direction when viewed from the + Z side.
- the excitation light L1 that has passed through the ⁇ / 4 wavelength plate 62 becomes linearly polarized light in the X direction, and is irradiated to the sample.
- the ⁇ / 4 wavelength plate 62 is included in the polarization adjusting unit that adjusts the polarization state of the excitation light when entering the sample.
- a polarization adjusting unit can reduce the loss of the light amount of the excitation light L1 as compared with the aspect described in FIG.
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Abstract
Description
第1実施形態について説明する。図1は、第1実施形態に係る顕微鏡および励起光の光路を示す図である。以下の実施形態において、顕微鏡1は走査型の蛍光顕微鏡であるものとして説明するが、実施形態に係る顕微鏡は、走査型の顕微鏡あるいは蛍光顕微鏡に限定されない。顕微鏡1は、ステージ2と、光源3と、照明光学系4と、検出光学系5と、検出装置6と、画像処理部7とを備える。顕微鏡1は、概略すると以下のように動作する。
第2実施形態について説明する。本実施形態において、上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。本実施形態において、画像処理部7(図4参照)は、周波数空間上のデータに対してフィルタリングを行って、画像を生成する。画像処理部7は、検出装置6から得られるデータに対してデコンボリューションを実行して、画像を生成する。画像処理部7は、上記のフィルタリングとして、検出装置6の検出部6aごとにデコンボリューションおよびアポダイゼーションを行って、画像を生成する。すなわち、画像処理部7は、周波数空間上のデータに対して、デコンボリューションを含むフィルタリングを行う。以下の説明において、適宜、デコンボリューションとアポダイゼーションの一連の処理を合わせて(総称して)、デコンボリューションと称することがある。
第3実施形態について説明する。本実施形態において、上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。図9は、第3実施形態に係る顕微鏡の画像処理部の処理を示す図である。顕微鏡の各部については、適宜、図1あるいは図4を参照する。
第4実施形態について説明する。本実施形態において、上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。本実施形態において、画像処理部7(図4参照)は、第3実施形態で説明した成分分離を行った後、分離された成分についてデコンボリューションを行って画像を生成する。
第5実施形態について説明する。本実施形態において、上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。図13は、第5実施形態に係る顕微鏡を示す図である。本実施形態において、検出装置6は、複数の検出部6aが1次元的に配列されたラインセンサ(ラインディテクター)を含む。複数の検出部6aは、検出装置6において1方向に配列されている。検出装置6は、試料面Saと光学的に共役な位置に配置される。複数の検出部6aが並ぶ方向(以下、配列方向という)は、干渉縞L2の周期方向と対応する方向に設定される。例えば、図13において、干渉縞の周期方向はX方向であり、複数の検出部6aの配列方向は、X方向に対応するXb方向に設定される。
第6実施形態について説明する。本実施形態において、上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。図15は、第6実施形態に係る顕微鏡を示す図である。本実施形態において、顕微鏡1は、遮光部材33を備える。遮光部材33は、試料面Saと光学的に共役な位置またはその近傍に配置される。図15において、検出装置6は、試料面Saと光学的に共役な位置に配置され、遮光部材33は、検出装置6の近傍に配置される。遮光部材33は、試料面Saと共役な位置またはその近傍に配置されてもよい。
第7実施形態について説明する。本実施形態において、上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。図17は、第7実施形態に係る顕微鏡を示す図である。本実施形態において、顕微鏡1は、駆動部22および駆動部34を備える。駆動部22は、第1実施形態と同様である。駆動部22は、マスク15を回転させ、干渉縞L2の周期方向を変更する。駆動部22は、試料Sに対する干渉縞L2の方向を変更する縞方向変更部に含まれる。
第8実施形態について説明する。本実施形態において、上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。図18は、第8実施形態に係る顕微鏡を示す図である。上述の実施形態において、瞳面P0(図2(C)参照)上で照明瞳が2極(2つの領域)に分かれる例を説明したが、照明瞳はその他の形態でもよい。ここでは、照明瞳が瞳面上で4極(4つの領域)に分かれる形態について説明する。
第9実施形態について説明する。本実施形態において、上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。図21は、第9実施形態に係る顕微鏡を示す図である。本実施形態において、顕微鏡1は、図13で説明したλ/2波長板30および光路回転部31を備える。光路回転部31は、駆動部32によって駆動され、照明光学系4の光軸の周りで回転する。光路回転部31が回転すると、励起光L1cの光路および励起光L1dの光路は、それぞれ、照明光学系4の光軸の周りで回転する。その結果、試料面Saに形成される干渉縞L2の周期方向は、Z方向の周りで回転する。
第10実施形態について説明する。本実施形態において、上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。第9実施形態において、顕微鏡1は、光路回転部31によって干渉縞L2の周期方向を変更するが、干渉縞L2の周期方向を変更する縞方向変更部は、光路回転部31と別の態様でもよい。
第11実施形態について説明する。本実施形態において、上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。図25は、第11実施形態に係る顕微鏡を示す図である。本実施形態において、顕微鏡1は、リレー光学系47を備える。リレー光学系47は、照明光学系4の一部であり、かつ検出光学系5の一部である。リレー光学系47は、走査部18において、偏向ミラー18aと偏向ミラー18bとの間の光路に配置される。偏向ミラー18aは、対物レンズ21の瞳面P0と光学的に共役な第1瞳共役面とほぼ同じ位置に配置される。リレー光学系47は、偏向ミラー18bとレンズ19との間に上記の第1瞳共役面と光学的に共役な第2瞳共役面が形成されるように設けられる。偏向ミラー18bは、上記の第2瞳共役面とほぼ同じ位置に配置される。
以下、変形例について説明する。上述の実施形態と同様の構成については、適宜、同じ符号を付してその説明を省略あるいは簡略化する。図26及び図27は、変形例に係る照明瞳を示す図である。
Claims (25)
- 光源からの光を複数の光束に分割する光束分割部を有し、前記光束分割部により分割された前記複数の光束の少なくとも一部の光束の干渉によって生成される干渉縞によって、試料を複数の方向において走査する照明光学系と、
前記試料からの光が入射する検出光学系と、
前記検出光学系を介して前記試料からの光を検出する複数の検出部を含む検出装置と、
前記検出装置の2以上の検出部の検出結果を用いて画像を生成する画像処理部と、を備える顕微鏡。 - 前記干渉縞は、前記干渉縞の周期方向において3以上の明部を有する、
請求項1に記載の顕微鏡 - 前記照明光学系は、対物レンズを有し、
前記光束分割部は、複数の開口部を有する開口部材を含み、
前記開口部材は、前記対物レンズの瞳面、前記瞳面の近傍、瞳共役面、又は前記瞳共役面の近傍に配置される、
請求項1又は請求項2に記載の顕微鏡 - 前記光束分割部は、回折格子を含み、
前記回折格子は、前記試料と共役な位置又はその近傍に配置される、
請求項1又は請求項2に記載の顕微鏡。 - 前記検出装置は、前記複数の検出部が1方向に配列されたラインセンサを含む、
請求項1から請求項4のいずれか1項に記載の顕微鏡。 - 前記検出装置は、前記複数の検出部が2方向に配列されたイメージセンサを含む、
請求項1から請求項4のいずれか1項に記載の顕微鏡。 - 前記試料に対する前記干渉縞の方向を変更する縞方向変更部を備える、
請求項1から請求項6のいずれか1項に記載の顕微鏡。 - 前記試料の像を前記複数の検出部に対して、前記検出光学系の光軸の周りで回転させる像回転部を備える、
請求項1から請求項7のいずれか1項に記載の顕微鏡。 - 前記像回転部は、前記検出光学系のうち前記照明光学系と重複しない光路に配置される、
請求項8に記載の顕微鏡。 - 前記縞方向変更部と前記像回転部とは同一の部材により構成される、
請求項8に記載の顕微鏡。 - 前記試料に入射する際の前記光の偏光状態を調整する偏光調整部を備える、
請求項1から請求項10のいずれか1項に記載の顕微鏡。 - 前記複数の検出部の位置は、前記検出光学系の倍率および前記干渉縞の周期に基づいて設定される、
請求項1から請求項11のいずれか1項に記載の顕微鏡。 - 前記画像処理部は、前記検出光学系の倍率および前記干渉縞の周期に基づいて、前記複数の検出部から選択される検出部の検出結果を用いて前記画像を生成する、
請求項1から請求項12のいずれか1項に記載の顕微鏡。 - 前記画像処理部は、前記複数の検出部の少なくとも1つの検出部から得られるデータを、その検出部の位置に基づいて補正する、
請求項1から請求項13のいずれか1項に記載の顕微鏡。 - 前記画像処理部は、前記複数の検出部の少なくとも一部の検出結果を周波数空間上のデータへ変換する
請求項1から請求項14のいずれか1項に記載の顕微鏡。 - 前記画像処理部は、前記複数の検出部の少なくとも一部の検出結果を、フーリエ変換によって前記周波数空間上のデータへ変換する、
請求項15に記載の顕微鏡。 - 前記画像処理部は、前記周波数空間上のデータに対してフィルタリングを行って、前記画像を生成する、
請求項15又は請求項16に記載の顕微鏡。 - 前記画像処理部は、前記周波数空間上のデータを前記周波数空間の複数の領域に分離して、前記画像を生成する、
請求項15から請求項17のいずれか1項に記載の顕微鏡。 - 前記画像処理部は、前記干渉縞の光強度分布に基づいて、前記周波数空間上のデータを前記周波数空間の複数の領域に分離する、
請求項18に記載の顕微鏡。 - 前記複数の領域は、互いに重複しないように設定される、
請求項18または請求項19に記載の顕微鏡。 - 前記画像処理部は、前記分離によって得られるデータの少なくとも一部の位相を変換して前記画像を生成する、
請求項18から請求項20のいずれか1項に記載の顕微鏡。 - 前記画像処理部は、前記干渉縞の光強度分布および前記検出部の位置に基づいて、前記位相を変換する量を決定する、
請求項21に記載の顕微鏡。 - 前記画像処理部は、前記検出装置から得られるデータに対してデコンボリューションを実行して、前記画像を生成する、
請求項1から請求項22のいずれか1項に記載の顕微鏡。 - 前記画像処理部は、前記複数の検出部の少なくとも1つの検出部から得られるデータに対して、その検出部の位置、及び前記干渉縞の光強度分布に基づいて前記デコンボリューションを実行する、
請求項23に記載の顕微鏡。 - 光源からの光を複数の光束に分割し、前記複数の光束の少なくとも一部の光束の干渉によって生成される干渉縞によって、試料を複数の方向において走査することと、
前記試料からの光が入射する検出光学系を介して、複数の検出部を含む検出装置によって、前記試料からの光を検出することと、
前記検出装置の2以上の検出部の検出結果を用いて画像を生成することと、を含む観察方法。
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| CN113711014A (zh) * | 2019-04-02 | 2021-11-26 | 热电科学仪器有限公司 | 使用结构化照明显微镜增强样品成像 |
| JP2022527827A (ja) * | 2019-04-02 | 2022-06-06 | サーモ エレクトロン サイエンティフィック インストルメンツ リミテッド ライアビリティ カンパニー | 構造化照明顕微鏡法を使用した高度な試料画像化 |
| CN113711014B (zh) * | 2019-04-02 | 2025-03-25 | 热电科学仪器有限公司 | 使用结构化照明显微镜增强样品成像 |
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| JP2023515509A (ja) * | 2020-02-19 | 2023-04-13 | サーモ エレクトロン サイエンティフィック インスツルメンツ エルエルシー | 構造化照明のための位相マスク |
| EP4106618A4 (en) * | 2020-02-19 | 2024-04-24 | Thermo Electron Scientific Instruments LLC | PHASE MASK FOR STRUCTURED LIGHTING |
| US12345865B2 (en) | 2020-02-19 | 2025-07-01 | Thermo Electron Scientific Instruments Llc | Phase mask for structured illumination |
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| US12332158B2 (en) * | 2020-04-10 | 2025-06-17 | Hamamatsu Photonics K.K. | Observation device and observation method |
| JP2022046447A (ja) * | 2020-09-10 | 2022-03-23 | カール ツァイス マイクロスコピー ゲーエムベーハー | 構造化方式で照明される顕微鏡画像の超高解像度評価方法及び構造化照明顕微鏡 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4628872A3 (en) | 2025-12-10 |
| JP7063337B2 (ja) | 2022-05-09 |
| EP3683611A4 (en) | 2021-06-09 |
| EP4628872A2 (en) | 2025-10-08 |
| EP3683611A1 (en) | 2020-07-22 |
| EP3683611B1 (en) | 2025-09-24 |
| US11287625B2 (en) | 2022-03-29 |
| US20200241271A1 (en) | 2020-07-30 |
| JPWO2019053768A1 (ja) | 2020-10-29 |
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