EP3769137A1 - Lighting device for microscope - Google Patents
Lighting device for microscopeInfo
- Publication number
- EP3769137A1 EP3769137A1 EP19711861.5A EP19711861A EP3769137A1 EP 3769137 A1 EP3769137 A1 EP 3769137A1 EP 19711861 A EP19711861 A EP 19711861A EP 3769137 A1 EP3769137 A1 EP 3769137A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- optical fiber
- light
- objective
- fiber
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
- G02B21/08—Condensers
- G02B21/082—Condensers for incident illumination only
- G02B21/084—Condensers for incident illumination only having annular illumination around the objective
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
- G02B21/08—Condensers
- G02B21/10—Condensers affording dark-field illumination
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
- G02B21/08—Condensers
- G02B21/12—Condensers affording bright-field illumination
- G02B21/125—Condensers affording bright-field illumination affording both dark- and bright-field illumination
-
- 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
Definitions
- the present invention relates to a lighting device for a microscope objective. It also relates to a lighting system implementing this device.
- the field of the invention is more particularly, but without limitation, that of the optical inspection of objects.
- dark field illumination sources can be arranged around the microscope objective, or integrated with the objective itself. These sources must in particular be arranged so as to provide illumination of the object to be inspected at an angle with respect to the axis of the objective making it possible to collect the light scattered by the structure of the illuminated object but not the incident light or specular reflection on the object.
- the known dark-field illumination devices are bulky and require a specifically adapted microscope architecture. In particular, they can not be used with standard microscope, and / or integrated into microscopy systems not intended for. In addition, the known devices do not offer enough flexibility to obtain illumination according to several azimuthal angles or different directions without significant modification of the illumination pattern.
- An object of the present invention is to provide a lighting device for an imaging system with an objective to overcome these disadvantages.
- An object of the present invention is to provide a dark field illumination device allowing illumination of the object to be inspected both uniformly in field and angle, offering wide angles of incidence.
- the lighting shall be adapted to the characteristics of the structures or defects to be inspected.
- Another object of the present invention is to provide a lighting device for covering azimuthal angles or various directions without changing the illumination pattern near the objective or the object to be inspected.
- Another object of the present invention is to provide a lighting device adapting to different types of existing microscope objectives.
- Another object of the present invention is to provide a compact and lightweight lighting device around the microscope objective.
- a lighting device for an imaging system with an imaging objective comprising:
- a sleeve configured to be positioned around said imaging lens
- At least one optical fiber integral with said sleeve and arranged to guide a light coming from at least one light source, and a direction means configured to orient a light beam emitted by said at least one optical fiber so as to illuminate an observation field of said imaging system at an angle with respect to the optical axis of said lens greater than the opening digital imaging system.
- the lighting device according to the invention can in particular be implemented with an imaging objective in the form of a microscope objective to achieve a dark field illumination.
- the illumination device according to the invention may comprise a sleeve of substantially or substantially cylindrical shape, with an inner diameter corresponding approximately to the outside diameter of an imaging or microscope objective, so that it can be slidably positioned or tight around the lens. It can thus be fixed or attached to the lens by clamping or by any other means such as screws.
- the lighting device according to the invention may also comprise fixing means for attaching it to a mechanical element other than the objective.
- a sleeve according to the invention may comprise any extension piece or any mechanical assembly able to position itself around an objective.
- the sleeve of the device may be adapted to be attached to, or positioned around, one or more existing microscope objectives. Imaging systems in the form of existing microscopes can thus easily be modified to create dark field detection systems. More precisely, the same sleeve can be adapted to several objectives whose diameters, magnifications and working distances are different.
- the lighting device according to the invention can also be implemented with interferometric objectives, such as for example Mirau lenses.
- the sleeve may comprise a wall or part with openings or guides ("V-grooves") for positioning the optical fiber or fibers integrally from the wall of said sleeve.
- the optical fiber or fibers may be arranged, at the sleeve, in a direction parallel or substantially parallel to an extension direction of said sleeve, which direction of extension being intended to be parallel or substantially parallel to the optical axis of the sleeve. an imaging lens around which the sleeve is positioned.
- the optical fiber or fibers may be arranged, at the sleeve, in one or more directions lying respectively in the same plane as the direction of extension of said sleeve.
- the steering means are also integral with the sleeve, so as to constitute with the optical fiber or fibers a mechanically stable assembly.
- Arranging the optical fibers in or integrally with the sleeve wall minimizes the size and weight of the device.
- the thickness of the wall is adapted to both the size of the fibers and the requirement of mechanical stability of the sleeve. The weight and bulk of the lens itself on which the device is used are therefore not significantly altered.
- the wall of the sleeve has a thickness of between about 2 and 4 mm for an objective of about 30 to 35 mm in diameter.
- the light source and other optical components are placed away from the lens so as not to clutter the area around the lens. This is particularly important when the device is used with multiple lenses placed close to each other. It is thus also possible to avoid heating up the environment of the objective on which the device is fixed, since this heating may indeed cause a variation of the refractive index of the air, which can lead to a degradation of the resolution of the optical imaging system or microscope.
- the objective on which the device is attached can also be used for light field microscopy measurements (with illumination of the field of view through the lens) without dark field lighting being changed or removed.
- the device may comprise a plurality of optical fibers arranged around the perimeter of the sleeve, for example in a regular manner.
- the optical fibers can be grouped into a plurality of groups of optical fibers, the groups being able to be arranged for example in a regular manner around the perimeter of the sleeve.
- optical fibers in the sleeve make it possible both to control the uniformity of the illumination and to select azimuthal angles or illumination directions in the field of view of the imaging system or the microscope.
- the azimuthal angle of illumination corresponds to the direction or orientation of the illumination beam in the plane of the field of view.
- the steering means comprises a mirror, for example for each optical fiber.
- the mirror is then placed at the output of the optical fiber in order to direct the light beam emitted by the latter in the desired direction.
- the steering means comprises a guide element arranged to curve the end of the at least one optical fiber, so as to direct the light beam emitted by the latter in the desired direction, or according to the desired lighting axis.
- This guide element may in particular comprise a mechanical guide part integral with, or part of, a wall of the sleeve.
- the steering means is produced by a treatment, such as polishing or cleavage, of the end of the optical fiber in order to direct the light beam emitted by the latter at an angle. determined by the angle of the exit face relative to the longitudinal axis of the fiber.
- the device according to the invention may comprise a lens arranged facing or at the exit of the at least one optical fiber.
- the lens makes it possible to control the opening angle of the beam emitted by the fiber and thus to modify the size of the illuminated area on the object to be inspected.
- the lens may be configured to collimate the light beam emitted by the optical fiber, or to focus it.
- the lens can be made by polishing the output end of the optical fiber itself.
- the at least one optical fiber is a multimode fiber.
- a multimode fiber has the advantage of being able to deliver a beam of greater uniformity, compared to a monomode fiber. It also has a wider acceptance angle that allows for more efficient light coupling with a wider variety of source types.
- the lighting device according to the invention may further comprise translation means configured to move the sleeve relative to an imaging objective (around which it is positioned), in a direction parallel to the optical axis of said objective.
- These translation means may comprise sliding means of the sleeve along the objective, and / or a translational system integral with another element than the objective.
- the lighting device may further comprise fastener means adapted to fix the sleeve on an imaging lens.
- These fastening means may allow to fix the sleeve in one or more positions along the axis of revolution or the optical axis of the lens. They may comprise, for example, clamping screws.
- the relative displacement of the sleeve with respect to the objective makes it possible in particular to modify the width of the illuminated zone in the field of view, to modify the angle of incidence of the light beams thereon, and more generally to adapt lighting at the working distance of the lens.
- the device according to the invention may furthermore comprise at least one light source configured to emit at least one light beam, and injection control means for injecting said at least one light beam into said light beam. less an optical fiber.
- the injection control means may comprise at least one fiber coupler for injecting a light beam emitted by a light source into at least two optical fibers.
- the injection control means may comprise at least one switch configured to inject a light beam in at least two different optical fibers sequentially.
- the use of a switch makes it possible in particular to illuminate the object to be inspected sequentially according to different azimuthal angles, and / or in different directions. The accuracy of detection of defects or structures on the object can thus be improved.
- system according to the invention may further comprise means for modifying the numerical aperture of the light emitted by said at least one optical fiber.
- These means for modifying the numerical aperture may be arranged between the at least one light source and an input (or an end to the opposite of the end to the field of view) of the at least one optical fiber.
- the modification of the numerical aperture of the light emitted by the fibers makes it possible in particular to vary the width and the luminance of the illuminated zone on the object to be inspected without having to modify the position of the sleeve and / or the objective relative to to the field of view or the object inspected.
- the means for modifying the numerical aperture may comprise a lens system (which may include one or more lenses).
- the means for modifying the numerical aperture may also comprise a fiber component with a gradual variation of the light guide section diameter along the propagation axis.
- This component may comprise a single fiber elongate or stretched (called “fiber taper” in English) or a bundle of several fibers elongated or stretched (“tapered fiber bundle” in English).
- the numerical aperture of the light beam injected at the input of a multimode optical fiber (in the limit of a maximum numerical aperture) is kept at the output of this fiber as long as there is no excessive stress constraints generating micro-curvatures.
- the means for modifying the numerical aperture of the light emitted by said at least one optical fiber are placed towards the entrance of the at least one optical fiber, and thus away from the objective microscope, thereby allowing flexibility of fit without the clutter of additional elements near the lens.
- the system according to the invention may comprise at least two light sources. These light sources can emit light beams having different polarizations and / or wavelengths.
- sources emitting wavelengths for which the object to be inspected appears opaque or transparent This allows in particular to observe different surfaces of the object, for example, the outer surfaces or an interface within the object.
- an imaging system including an imaging lens, and a lighting device according to the invention for providing dark field illumination.
- This imaging system can of course any other necessary element, such as a camera. It may in particular be in the form of a microscope.
- It may also comprise a plurality of microscope objectives, for example mounted on a rotating or linear turret.
- one or more objectives may be provided with a lighting device according to the invention.
- a lighting device according to the invention may also be adapted to be mounted on one or more objectives, manually or by means of mechanical automation.
- the microscope objective on which the sleeve of the lighting system is fixed may be replaced by another microscope objective without it being necessary to modify the configuration of the sleeve with respect to the object to be inspected (except possibly by adjusting a working distance) and to modify the lighting conditions of the optical fibers (numerical aperture, angle of incidence, etc.).
- Figure 1 is a schematic representation of a non-limiting embodiment of a device according to the invention, set up on two different types of microscope objective;
- Figure 2A illustrates a sectional view of a device according to the invention;
- Figure 2B shows a detail of Figure 2A
- Figure 3 shows a detail of a device according to one embodiment of the invention
- Figure 4 shows a detail of a device according to another embodiment
- FIGS. 5A-5D schematically show embodiments of a system according to the invention.
- Figures 6A and 6B schematically illustrate means for controlling the numerical aperture at the output of the fibers.
- the embodiments presented illustrate, without loss of generality, implementations of the lighting device according to the invention in a microscope-type imaging system, provided with an imaging objective of microscope objective type.
- a microscope-type imaging system provided with an imaging objective of microscope objective type.
- Such a device makes it possible, for example, to make an image of an object to be inspected according to a field of observation on an imaging sensor (for example of the camera or CCD sensor type).
- the terms “lower” and “upper” are used to designate the location of elements when the device according to the invention is used with a microscope, that is to say, fixed on a objective, without being limiting.
- the term “inferior” may refer to the end of the (microscope) objective opposite the field of view.
- an object to be inspected or observed may be in particular any substrate or wafer intended to be used in the field of electronics, optics or optoelectronics.
- FIG. 1 schematically illustrates an example of a lighting device 1 according to one embodiment of the invention.
- the lighting device 1 is illustrated mounted on a microscope objective 2.
- the device 1 comprises a cylindrical element in the form of a sleeve 10.
- the sleeve 10 can be attached to the objective 2 in various known ways, for example by means of a screw or a clamp (not shown).
- the inside diameter of the cylindrical sleeve 10 is adapted so that the sleeve 10 can be attached to several types of lenses.
- the same sleeve can be attached to lenses 32 to 34 mm in diameter.
- the cylindrical sleeve 10 comprises at least one or in the illustrated embodiment a plurality of optical fibers 14. Each optical fiber 14 is arranged in the wall of the sleeve 10 parallel to the axis of revolution of the sleeve 10.
- Each optical fiber 14 is configured to guide light in order to illuminate a substrate 3 to be inspected at an angle with respect to the axis of the sleeve 10, so as to obtain a dark-field illumination of the substrate 3.
- the beam of The illumination is indicated by reference 16 in FIG. 1.
- the specular reflection on the substrate 3 due to the illumination beam 16 is indicated by the reference 18.
- Figure 2A shows a sectional view of the cylindrical sleeve 10 in the plane perpendicular to its axis
- Figure 2B shows a detail of Figure 2A.
- the sleeve 10 consists of an inner ring 11 and an outer ring 12.
- the outer diameter of the inner ring 11 corresponds substantially to the inside diameter of the outer ring 12.
- the inner ring 11 has V-shaped grooves 13 arranged along the axis and over the entire length of the sleeve 10.
- the grooves 13 serve to receive optical fibers 14.
- the optical fibers 14 are held in the grooves when the inner ring 11 and the outer ring 12 are assembled together.
- the grooves 13 may have other shapes adapted to hold the optical fibers 14, such as a U-shaped for example.
- the cylindrical sleeve 10 is made in one piece.
- channels in the wall of the sleeve can receive the optical fibers, possibly inserted and glued at their end in a ferrule.
- the insertion of the ferrules into channels of suitable diameter ensures a precise and easy positioning of the optical fibers 14.
- the channels may extend only towards the lower end of the sleeve 10 facing the field of view for maintain the end of the optical fibers 14 in the ferrules, and lead into wider openings or recesses in the wall of the sleeve towards its upper end allowing easy passage of the optical fibers.
- the device 1 comprises 64 optical fibers 14 distributed homogeneously over the entire perimeter of the sleeve 10.
- the device according to the invention may comprise a single fiber optical, or between two and about a hundred optical fibers. The number of fibers depends in particular on the illumination configurations that one wishes to achieve.
- the optical fibers 14 are preferably multimode fibers. Their diameter is, for example, of the order of 400 pm.
- Figure 3 shows a detail view of the lower part of the device 1 according to the embodiment of Figure 1.
- the inner ring 11 comprises a cover 15 on one of its ends.
- the cache 15 has, for example, a ring shape.
- the cover 15 is an integral part of the inner ring 11.
- the cover 15 may alternatively be fixed on the inner ring 11 by known means.
- the cover 15 makes it possible to conceal the light coming from the optical fibers 14 and being reflected by the object inspected 3 in the field of observation of the microscope, to prevent this reflected light from returning inside the sleeve and being reflected by the inner wall thereof to form parasitic light sources.
- only the light directly from the optical fibers 14 and diffused by defects or structures of the substrate is collected by the objective and thus detected by a detection system.
- the outer ring 12 comprises a mirror 17 at its lower end.
- the mirror 17 is arranged so that the light emitted by each optical fiber 14 is oriented by the mirror 17 at an angle with respect to the axis of the cylindrical sleeve 10 in order to illuminate in a dark field the substrate to be inspected which is found in the field of observation of the microscope, or more precisely in the cone of acceptance of the objective of the microscope.
- the illumination angle is adjusted so that the specular reflections are outside the acceptance cone of the microscope objective.
- the mirror 17 may have an annular shape. It can in particular be made in the form of a polished metal ring.
- the mirror 17 may also comprise a plurality of plane mirror elements so that a mirror element is disposed in the axis of each optical fiber 14.
- the optical fibers 14 disposed in the sleeve 10 each have a lower end (facing the mirror 17) without termination, polished or cleaved at right angles, and an upper end coupled to a light source, a coupler or other optical component, for example via connectors or splices.
- Figure 4 shows a detail of another embodiment of the device according to the invention.
- a lens 19 is arranged near the exit an optical fiber 14.
- the lens 19 controls the opening angle of the light beam illuminating the substrate to be inspected.
- the lens 19 may be configured to obtain a collimated or focused beam.
- the end of the optical fiber can be maintained as previously by a groove (V-groove) or, as shown in Figure 4, inserted in a ferrule 40.
- the lens 19 may be a micro-lens , or an index gradient lens (GRIN). In the latter case, it can also be integrated in ferrule 40.
- GRIN index gradient lens
- the output end of the optical fiber 14 can be processed directly, for example by polishing, to modify the characteristics of the beam emitted by the fiber 14. It can in particular be treated so as to form a lens at its end. , and / or polished at an angle to generate an illumination beam deviated from the axis of the fiber 14.
- the invention also relates to a dark field illumination system for an imaging system with a microscope objective.
- FIGS. 5A to 5D show diagrammatically exemplary embodiments of the lighting system 100.
- the system 100 comprises the device described above and at least one light source 20 as well as means 21, 22 for controlling the injection of the beams into the beams.
- the light source 20 is placed at a distance from the objective of the microscope.
- the optical fibers 14 are coupled directly or indirectly, for example via couplers 21, to the light source 20.
- the source 20 may be, for example, a light-emitting diode (LED) source, a thermal source or a laser.
- the source 20 is preferably provided with an optical fiber connector. If the device according to the invention comprises several optical fibers 14, the light beam 23 coming out of the light source 20 can be divided into several beams
- the coupler 21 can be made by a fiber optic component, an integrated optical circuit or a component optical volume. Each beam 24 emerging from the coupler 21 is injected into one of the optical fibers 14.
- FIGS. 5A to 5D make it possible to obtain different illumination configurations.
- the individual control of the illumination of each fiber 14 is achieved by means of different combinations of couplers 21 and / or switches 22.
- FIGS. 5A to 5D only one of the bases 10a of the sleeve 10, corresponding to the face of The input of the optical fibers 14 is shown schematically.
- Figure 5A illustrates an embodiment of the illumination system in which a light beam 24 is injected into each optical fiber 14 at the same time, the fibers 14 being evenly distributed in the wall of the sleeve around its perimeter. To do this, the light beam 23 emitted by the source 20 is divided into as many beams 24 as there are optical fibers 14 by a coupler 21. This embodiment thus allows a uniform and continuous illumination.
- Figure 5B shows another embodiment of the lighting system.
- a switch 22 is placed between the source 20 and two couplers 21a, 21b. Depending on the state of the switch 22, one or other of the couplers 21a, 21b receives the light from the source 20 sequentially.
- the optical fibers 14 at the output of the couplers 21a, 21b are arranged in the sleeve 10 to provide illumination along two different azimuthal angles. According to variants, more than two couplers can be used to obtain more than two azimuthal illumination angles.
- Figure 5C shows an embodiment for illuminating the substrate in different directions or azimuthal angles with a plurality of sources.
- the illumination is performed sequentially.
- the use of two light sources 20a, 20b or more also makes it possible to vary the characteristics of the light emitted.
- the sources 20a, 20b may, for example, emit light beams 23a, 23b of different wavelengths from one another. It is thus possible to choose a wavelength for which the substrate to be inspected is transparent in order to be able to penetrate the substrate, and another wavelength for which the substrate is opaque.
- the light from both sources may also have different polarization states.
- more than two light sources can be used.
- FIGS. 5B and 5A may be combined with the configuration of FIG. 5C in order to be able to connect a fiber to a plurality of sequentially switchable sources. This makes it possible to modify the lighting conditions (such as, for example, the wavelength) emanating from a fiber.
- two light sources 20a, 20b are each associated with a coupler 21a, 21b.
- the couplers 21a, 21b each have an input channel and several output channels.
- the optical fibers 14 of the lighting device are grouped into four groups 14 'of three fibers respectively.
- the groups 14 ' are arranged in a regular manner around the perimeter of the sleeve. This arrangement allows illumination of the substrate at preferred azimuthal angles.
- the use of two light sources 20a, 20b makes it possible to have light beams 23a, 23b having different characteristics.
- other fiber groups 14 are also possible.
- the azimuthal angle or direction of illumination it is also important to be able to control the uniformity and luminance of the illumination over a given area of the substrate to be inspected.
- the size of the illuminated area can be adjusted by the position of the sleeve, and thus the optical fibers, relative to the substrate.
- Figures 6A and 6B schematically illustrate means for controlling and adjusting the numerical aperture of the light beams at the output of the fibers.
- Fig. 6A is shown an optical fiber 14 with a digital aperture converter 30 placed between the light source and the input 14a of the optical fiber 14 to control the injection conditions. light in the fiber.
- the converter 30 is configured to change the numerical aperture NA in an input beam to obtain a numerical aperture NA 0 different for the output beam.
- the input beam comes from the light source.
- the digital aperture converter 30 may be embodied, for example, by lenses or fiber components such as multimode fiber combiners with gradual changes of the guides along the axis of propagation.
- the output beam of the converter is injected into the optical fiber 14 and has a numerical aperture NA 0UT .
- the numerical aperture NA 0Ut is kept at the output 14b of the fiber 14.
- FIG. 6B shows an example of a fiber component for making a digital aperture converter.
- the converter 30 is made by a fiber coupler.
- a fiber coupler consists of a bundle of optical fibers on one side which are fused into a single optical fiber on the other side ("tapered fiber bundle").
- the fused portion 31 has a tapered shape ("tap") defining a stretch ratio d out / d in between the output diameter d or t and the input diameter d m .
- the coupler 31 may be connected to a light source at the input 31a (single fiber side) and to the optical fibers 14 of the beam side lighting device 31b.
- the stretch ratio of the fiber coupler 31 defines a ratio between the input numerical aperture NA in and the numerical aperture NA 0Ut of output:
- the digital aperture conversion is performed away from the microscope objective, thus allowing for adjustment flexibility without the clutter of additional elements.
- the optical fiber will emit to the inspected substrate a digital aperture beam NA or controlled by the numerical aperture of the source and / or digital aperture converter.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Microscoopes, Condenser (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1852353A FR3079313B1 (en) | 2018-03-20 | 2018-03-20 | MICROSCOPE LIGHTING DEVICE |
PCT/EP2019/056236 WO2019179841A1 (en) | 2018-03-20 | 2019-03-13 | Lighting device for microscope |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3769137A1 true EP3769137A1 (en) | 2021-01-27 |
Family
ID=62751049
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19711861.5A Withdrawn EP3769137A1 (en) | 2018-03-20 | 2019-03-13 | Lighting device for microscope |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210116694A1 (en) |
EP (1) | EP3769137A1 (en) |
CN (1) | CN112119341A (en) |
FR (1) | FR3079313B1 (en) |
WO (1) | WO2019179841A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117388976B (en) * | 2023-10-12 | 2024-06-21 | 魅杰光电科技(上海)有限公司 | Annular dark field optical fiber device |
CN117589790A (en) * | 2023-11-30 | 2024-02-23 | 魅杰光电科技(上海)有限公司 | Dark field lighting device and optical detection system for dark field lighting |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5647605Y2 (en) | 1976-09-30 | 1981-11-07 | ||
US4729070A (en) * | 1986-05-12 | 1988-03-01 | David Chiu | Adjustable ring light |
US6146025A (en) * | 1998-08-03 | 2000-11-14 | Litton Systems Inc. | Laser diode and substrate |
CA2370508A1 (en) * | 1999-04-30 | 2000-11-09 | Douglas M. Brenner | Improved coupling of light from a small arc lamp to a larger target |
CN101414056B (en) * | 2008-12-05 | 2010-08-11 | 南京东利来光电实业有限责任公司 | Dark field illumination objective lens apparatus |
US20120057154A1 (en) * | 2010-09-08 | 2012-03-08 | Andrei Brunfeld | Optical measuring system with matched collection lens and detector light guide |
US20130170024A1 (en) * | 2010-09-14 | 2013-07-04 | Applied Precision, Inc. | Oblique-illumination systems and methods |
JP2012220609A (en) * | 2011-04-06 | 2012-11-12 | Nikon Corp | Microscope apparatus |
JP6108772B2 (en) | 2012-11-05 | 2017-04-05 | オリンパス株式会社 | Microscope and dark field objective lens |
CN104238020B (en) * | 2013-06-09 | 2017-02-22 | 中国科学院大连化学物理研究所 | Manufacturing method for plastic optical fiber micro lens |
-
2018
- 2018-03-20 FR FR1852353A patent/FR3079313B1/en active Active
-
2019
- 2019-03-13 WO PCT/EP2019/056236 patent/WO2019179841A1/en unknown
- 2019-03-13 EP EP19711861.5A patent/EP3769137A1/en not_active Withdrawn
- 2019-03-13 CN CN201980026694.7A patent/CN112119341A/en active Pending
- 2019-03-13 US US16/981,778 patent/US20210116694A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20210116694A1 (en) | 2021-04-22 |
FR3079313A1 (en) | 2019-09-27 |
CN112119341A (en) | 2020-12-22 |
FR3079313B1 (en) | 2020-07-24 |
WO2019179841A1 (en) | 2019-09-26 |
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