WO2020058076A1 - Optische anordnung für fluoreszenzmikroskopische anwendungen - Google Patents
Optische anordnung für fluoreszenzmikroskopische anwendungen Download PDFInfo
- Publication number
- WO2020058076A1 WO2020058076A1 PCT/EP2019/074340 EP2019074340W WO2020058076A1 WO 2020058076 A1 WO2020058076 A1 WO 2020058076A1 EP 2019074340 W EP2019074340 W EP 2019074340W WO 2020058076 A1 WO2020058076 A1 WO 2020058076A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical system
- photon
- optical
- sample
- arrangement according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—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
-
- 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
- G02B21/0076—Optical details of the image generation arrangements using fluorescence or luminescence
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/16—Microscopes adapted for ultraviolet illumination ; Fluorescence microscopes
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B2207/00—Coding scheme for general features or characteristics of optical elements and systems of subclass G02B, but not including elements and systems which would be classified in G02B6/00 and subgroups
- G02B2207/114—Two photon or multiphoton effect
Definitions
- the invention relates to an optical arrangement for fluorescence microscopic applications using non-classical light.
- the area of application is in
- the light sheet can be formed by a line focus, a line image or a laterally scanning laser beam. Only in this light sheet can fluorescence molecules be excited by two-photon absorption and thus show fluorescence. Disadvantage of the method is the need for illumination with very high-intensity continuous wave lasers or laser systems for ultra-short laser pulses. In both cases, the sample is irradiated with high-intensity laser radiation or even laser pulses and exposed to a high radiation dose with high energy. This leads to the fading of the fluorescence as well as to phototoxicity, especially with biological samples. Here, too, the two-photon absorption probability and thus also the fluorescence intensity depend quadratically on the current stimulus. intensity. c.
- Possibilities for photon pair fluorescence microscopy are also known from US Pat. No. 5,796,477 B.
- the two-photon absorption is not stimulated by high-intensity or pulsed lasers, but by photon pairs from two correlated (in space, time, impulse and / or energy) photons. These can be generated in particular by spontaneous difference frequency conversion in a nonlinear crystal outside the sample.
- Those with the photons can be spatially separated from one another during their movement from the photon pair source to the respective sample. If they have a different wavelength, this can be achieved with a dichroic mirror. If they have opposite polarization, they can be spatially separated by a polarization beam splitter.
- both photons leave a crystal with nonlinear optical properties spatially separated and are therefore spatially separated.
- the two photon beams are then focused crosswise into the sample.
- the two-photon absorption can then take place in the overlap region of the photons meeting in the focus.
- the two-photon absorption and thus the fluorescence intensity are linearly proportional to the current excitation intensity.
- Another advantage is that the focal volume compared to that in a. described method can be smaller.
- a disadvantage of this method is the complex experimental setup, since it must be ensured that both photons of a pair arrive at the beam overlap volume at exactly the same time and meet within the sample. This can be difficult due to the very short coherence time and possibly different but correlated wavelength of the two photons. A very precise adjustment, which is at the expense of flexibility and practicality, is therefore necessary.
- the method proposed here is based on the use of a preferred collinear source from which in particular photon pairs or else multi-photon states are emitted simultaneously on a sample and since the principle of light-sheet microscopy can be used.
- a source of non-classical light emits multiphoton beams, but at least photon pair beams from in particular photon pairs or else multi-photon states, preferably in collinear geometry. This can be done by spontaneous difference frequency conversion / spontaneous parametric fluorescence in a nonlinear, also periodically poled optical crystal.
- the multiphoton beam (s) pass through a first optical system onto a sample, so that a light sheet or a light sheet-like shape is formed.
- the light sheet or the light sheet-like shape can be designed as a line focus that is constant over time, but also as a photon beam scanned in the light sheet plane, or can be composed by the chronological sequence of small partial light sheets.
- a suitable first optical system can be a lens or a photon reflecting optical element or polarization optics or an optical filter or any arrangement of several of these optical elements.
- a light sheet or a light sheet-like shape can also be achieved by moving an optical element, which can be part of the first optical system.
- an optical element which can be part of the first optical system.
- a photon reflecting the element can be pivoted about an axis of rotation and thus the position on the sample at which the photon pairs meet at the same time can be changed, in a similar manner to that which is possible with the known scanner mirrors in laser technology.
- a simultaneous absorption of several photons, in particular of photon pairs, and thus fluorescence excitation is possible only in the region of the sample which is illuminated in the region of the light sheet or the light sheet-like shape.
- Part of the fluorescence radiation becomes optional
- the second optical system can be an optical lens or a fluorescent radiation reflecting element or polarization optics or an optical filter or any arrangement of several of these optical elements.
- a detector system should enable a spatially resolved measurement of the fluorescence radiation that has been excited within the light sheet.
- the detector system can be a camera with sufficient sensitivity. Examples of this are a CCD, EMCCD, ICCD, CMOS camera, SPAD array. It can include an optical filter or a second optical system.
- the second optical system and the detection system can also be designed as a unit.
- a plurality of photon beams can also be used, so that fluorescence can be excited simultaneously in several light sheets or in areas with a light sheet-like shape on the sample.
- the excitation of the fluorescence can also be done explicitly by multiphoton absorption of multi-photon states, in particular of photon pairs that strike a sample at the same time.
- multiphoton states can e.g. can be realized by so-called N00N states, in which case an N-photon absorption takes place.
- a source of non-classical light can be, for example, a non-linear crystal pumped by a laser or another source of photon pairs or multiphoton states, such as a laser-pumped waveguide structure in a non-linear crystal, or at least two identical coherently pumped quantum dots.
- the solution according to the invention has several advantages over the prior art for fluorescence microscopy by means of multiphoton absorption. Since the fluorescence intensity scales linearly with the current illumination intensity, the radiation dose of the sample can be reduced while the signal yield remains the same, or the signal strength and image contrast of the fluorescence radiation detected with the detection system can be increased while the radiation dose remains constant.
- the process is extremely gentle, without unnecessary light exposure of the sample and thus allows long-term studies of photosensitive samples, since both fluorescence bleaching and phototoxic can be minimized.
- the structure is significantly simplified and more robust, so that a cost reduction and improvement of the axial resolution can be achieved.
- the collinear structure is compatible and can be implemented with existing light sheet microscope systems.
- Multiphoto NEN radiation can be focused with photons of a certain center wavelength to focal volumes that are otherwise only achievable with laser light of half the wavelength.
- the axial resolution of the detectable fluorescence radiation within the respective light sheet can thus be increased. Overall, increased efficiency, increased spatial resolution and increased penetration depth are possible.
- the linear relationship between fluorescence intensity and photon beam intensity is also advantageous for data evaluation, since there is a linear relationship between the measurement variable (fluorescence signal) and excitation variable (radiation dose).
- FIG. 1 shows how a photon pair beam 2 is directed from a collinear source of non-classic light 1 to a first optical system 3.
- the first optical system 3 can be designed as defined in the claims.
- the photon pair beam 2 influenced by the first optical system 3 is directed onto / into the sample 5 such that at least one one-dimensional linear movement of the position at which the photon pair beam 2 hits the sample 5 or enters the sample to form a light sheet 4 he follows.
- the movement can be achieved by a movement of the element reflecting the photons, in particular by means of a pivoting movement about an axis of rotation of a reflecting element.
- Fluorescence radiation 6 generated in this way strikes a second optical system 7, which is also designed as defined in the claims.
- Detector system 8 is a spatially resolved detection of fluorescence radiation, which can be evaluated by fluorescence microscopy.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pathology (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Microscoopes, Condenser (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17/275,705 US20220034813A1 (en) | 2018-09-18 | 2019-09-12 | Optical arrangment for fluorescence microscopy applications |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018215833.9A DE102018215833B4 (de) | 2018-09-18 | 2018-09-18 | Optische Anordnung für fluoreszenzmikroskopische Anwendungen |
| DE102018215833.9 | 2018-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020058076A1 true WO2020058076A1 (de) | 2020-03-26 |
Family
ID=68051748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2019/074340 Ceased WO2020058076A1 (de) | 2018-09-18 | 2019-09-12 | Optische anordnung für fluoreszenzmikroskopische anwendungen |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20220034813A1 (de) |
| DE (1) | DE102018215833B4 (de) |
| WO (1) | WO2020058076A1 (de) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5503613A (en) | 1994-01-21 | 1996-04-02 | The Trustees Of Columbia University In The City Of New York | Apparatus and method to reduce restenosis after arterial intervention |
| US5796477A (en) | 1997-02-27 | 1998-08-18 | Trustees Of Boston University | Entangled-photon microscopy, spectroscopy, and display |
| US6020591A (en) | 1997-07-11 | 2000-02-01 | Imra America, Inc. | Two-photon microscopy with plane wave illumination |
| DE102013205115A1 (de) * | 2013-03-22 | 2014-09-25 | Leica Microsystems Cms Gmbh | SPIM-Anordnung |
| US20150098126A1 (en) * | 2013-10-09 | 2015-04-09 | Howard Hughes Medical Institute | Multiview Light-Sheet Microscopy |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10201388A1 (de) * | 2001-08-24 | 2003-03-13 | Zeiss Carl Jena Gmbh | Verfahren und / oder Apparaturen für mikroskopische Abbildung |
| WO2003060610A1 (de) * | 2002-01-16 | 2003-07-24 | Carl Zeiss Jena Gmbh | Verfahren und anordnungen zur mikroskopischen abbildung |
| DE10211458A1 (de) * | 2002-03-12 | 2003-09-25 | Zeiss Carl Jena Gmbh | Verfahren und Anordnung zur Erhöhung der Auflösung in einem Mikroskop |
-
2018
- 2018-09-18 DE DE102018215833.9A patent/DE102018215833B4/de active Active
-
2019
- 2019-09-12 US US17/275,705 patent/US20220034813A1/en not_active Abandoned
- 2019-09-12 WO PCT/EP2019/074340 patent/WO2020058076A1/de not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5503613A (en) | 1994-01-21 | 1996-04-02 | The Trustees Of Columbia University In The City Of New York | Apparatus and method to reduce restenosis after arterial intervention |
| US5796477A (en) | 1997-02-27 | 1998-08-18 | Trustees Of Boston University | Entangled-photon microscopy, spectroscopy, and display |
| US6020591A (en) | 1997-07-11 | 2000-02-01 | Imra America, Inc. | Two-photon microscopy with plane wave illumination |
| DE102013205115A1 (de) * | 2013-03-22 | 2014-09-25 | Leica Microsystems Cms Gmbh | SPIM-Anordnung |
| US20150098126A1 (en) * | 2013-10-09 | 2015-04-09 | Howard Hughes Medical Institute | Multiview Light-Sheet Microscopy |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018215833B4 (de) | 2020-04-02 |
| US20220034813A1 (en) | 2022-02-03 |
| DE102018215833A1 (de) | 2020-03-19 |
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