EP1938087A1 - Ringleuchte zur ausleuchtung eines begrenzten volumens und deren verwendung - Google Patents
Ringleuchte zur ausleuchtung eines begrenzten volumens und deren verwendungInfo
- Publication number
- EP1938087A1 EP1938087A1 EP06805311A EP06805311A EP1938087A1 EP 1938087 A1 EP1938087 A1 EP 1938087A1 EP 06805311 A EP06805311 A EP 06805311A EP 06805311 A EP06805311 A EP 06805311A EP 1938087 A1 EP1938087 A1 EP 1938087A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- ring
- light source
- hollow cylinder
- lens
- 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- Withdrawn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
- 239000002245 particle Substances 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 abstract 1
- 238000005286 illumination Methods 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000000149 argon plasma sintering Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 241000282461 Canis lupus Species 0.000 description 1
- 241001465382 Physalis alkekengi Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 238000003909 pattern recognition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Optical investigation techniques, e.g. flow cytometry
- G01N15/1456—Optical investigation techniques, e.g. flow cytometry without spatial resolution of the texture or inner structure of the particle, e.g. processing of pulse signals
- G01N15/1459—Optical investigation techniques, e.g. flow cytometry without spatial resolution of the texture or inner structure of the particle, e.g. processing of pulse signals the analysis being performed on a sample stream
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Optical investigation techniques, e.g. flow cytometry
- G01N2015/1493—Particle size
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
- G01N21/474—Details of optical heads therefor, e.g. using optical fibres
- G01N2021/4752—Geometry
- G01N2021/4759—Annular illumination
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
- G01N2021/4764—Special kinds of physical applications
- G01N2021/4769—Fluid samples, e.g. slurries, granulates; Compressible powdery of fibrous samples
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/02—Mechanical
- G01N2201/021—Special mounting in general
- G01N2201/0218—Submersible, submarine
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/062—LED's
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/063—Illuminating optical parts
- G01N2201/0638—Refractive parts
Definitions
- the invention relates to a ring light with a hollow cylinder designed as a light source with a light source and with a device for guiding the light emission, wherein the light source has a radiating surface with a pointing to the axis of the hollow cylinder Lichtabstrahlraum.
- Such ring lights are e.g. to camera lenses for macro photography, as operating field illumination in medicine or for transmitted light or reflected light illumination in light microscopy in use.
- a ring light is arranged concentrically to the optical axis of the imaging optics. It is thus achieved in contrast to the spot lighting a shadow-free illumination of the object to be imaged. Also in the field of particle detection in flows a shadow-free, uniform and intense lighting is needed, but here within a limited volume, whereby only the particles entering the illuminated area with the flow are considered.
- DD 232 552 A1 discloses a device for counting and classifying dispersed particles in liquids with a measuring volume spatially limited by a measuring cell, in which a laser beam is used to illuminate the measuring volume, the beam focus being in the middle of the measuring volume, so that the detected measuring volume is reduced to a point.
- the measuring volume is due to the training of the The measuring cell is concentrated so that there is always only one particle in the light focus whose scattering is measured in the laser light.
- DD 221 861 A1 describes a lighting device for generating a two-dimensional light strip for pattern recognition and identification of workpieces in an industrial environment.
- a linear light source is used whose rays are directed through a louvre diaphragm and bundled by a cylindrical lens on the object to be detected.
- a sharp black-and-white image of the respective illuminated strip is generated and analyzed by contrast adjustment in the recording system.
- a reflector can be mounted behind the light source for a higher light output.
- Luminous efficiency corresponds approximately to the beam angle and is therefore very low.
- DE 197 36 172 B4 describes a device for analyzing particles dispersed in a flowing fluid, which works with diaphragms whose edges are curved in a hyperbolic manner and thus when illuminated define a three-dimensional measuring volume with a known depth of field, which is formed as a truncated cone with curved edges is.
- particles with a defined transit time are evaluated in the measuring volume.
- the illumination device is arranged parallel to the detector, the detection signal is deflected by a prism from the measurement volume.
- VPR video plankton recorders
- VPR uses point or line light sources and single spherical or cylindrical lenses for collimation.
- strong halogen systems are also used.
- the known devices have the problem that no sharp optical limit of the measuring volume can be generated and the depth of focus in the measuring volume is complicated software adjusted, which In the small-scale area of plankton observation leads to high inaccuracies in the volume estimation.
- the ring light for shadow-free Repropapie from DE 299 21 150 U1 is known.
- the ring light for shadow-free Repropapie from DE 299 21 150 U1 is used as a bulbs commercially available ring fluorescent lamp. It radiates its light evenly on all sides, ie also inwards in the direction of the axis of the light source.
- a device for directing the light emission direction is formed here by a device which mainly changes the incidence of light on the object to be illuminated by raising or lowering the luminous means.
- a ring lamp is known from DE 102 11 768 A1, from which the present invention proceeds as the closest prior art.
- This document discloses an existing from a ring of light-emitting diodes for white light, designed as a flat hollow cylinder light source whose emission direction points inwards on the axis of the hollow cylinder.
- a two-part construction of the LEDs carrying the first ring with respect to a fixed second ring can be changed in diameter.
- the diodes supporting, flexible, circular curved board is arranged with its lower end in the fixed second ring and with its upper end in the variable first ring, with changing the diameter of the first ring, the angle of the radiation with respect to the axis the ring light changed.
- This device is used to optimize a shadow-free illumination of different images to be imaged, fixed objects.
- the described device for directing the light emission can not illuminate a strictly limited volume.
- the light is, limited only by the not further defined in their dimensions edges of the two mutually displaceable rings, and thus spans a up and down only vaguely delimited, double-conical volume with significantly beyond going scattering areas.
- the object of the present invention is to provide a ring lamp of the generic type described above, which illuminates a very strictly limited volume in all three spatial dimensions bright.
- the ring light should be simple, robust in design and handling designed and inexpensive to produce.
- the present invention is characterized in that the means for directing the light emission is formed by a lens system, which is at least one in a orthogonal to the axis of the light source forming the hollow cylinder radial plane focusing lens formed as a further hollow cylinder , and an annular, centered in the beam path behind the one focussing lens arranged aperture diaphragm, and that the emission surface of the light source and the lens system have the same length and are arranged to each axis and length congruent, with a determined by the inner radius of the lens system radial surface and the length of Lensensystems a strictly limited volume span.
- the ring lamp according to the invention has a lighting means which is arranged distributed uniformly on a light source designed as a hollow cylinder.
- the emission direction of the light source is inwardly perpendicular to the axis of the hollow cylinder and therefore with the aligned orthogonal to the axis of the hollow cylinder radial planes coincident.
- the main luminous flux directly illuminates the interior of the hollow cylinder and only a very small Streuanteil leaves this spanned by the cross section and the length of the hollow cylinder space. It can be considered as a strictly limited three-dimensional volume. Due to the nature of the all-round light source, a largely uniform and shadow-free illumination of objects located in the volume is achieved.
- the length of the hollow cylinder can be made particularly low, so that it can be said of a thin, circular lens. Plankters passing through the flow are abruptly illuminated very brightly and can thereby be registered with a camera system located at a distance which does not adversely affect the flow. Then they are dimmed seamlessly, avoiding undefined edges. With an exact focus on the thin lens, the image between the camera and the lens, but also behind the lens, unlit plankter will attenuate the recording only slightly. The thinner the lens, the less light is scattered by the passing Plankter outward and reflected on still or again unlighted Planktem in the recording disturbing manner.
- the minimum thickness of the lens depends on the one hand on the possible structural conditions and the expected flow velocities and on the other hand on the size of the Plankter to be imaged, which should be at least briefly completely in the light, the necessary exposure and process times and the depth of field for the Camera as additional parameters added.
- the light source can light up in a flash even with a further increase in luminous flux.
- the radiation of the light source of the light source must be focused to a horizontal beam path for a strictly limited in the length of the hollow cylinder lens.
- the one focusing lens is designed as a Fresnel lens. Fresnel lenses or more precisely Fresnelsche
- Fresnel lenses are optical lenses that were originally developed for lighthouses. They allow the construction of large short focal length lenses without the weight and volume of conventional lenses. The reduction of the volume is done in the Fresnel lenses by a division into annular areas. In each of these areas, the thickness is reduced compared to the conventional lens, so that the Fresnel lens receives a series of annular steps having the same curvature as the respective portion of the original lens. Since light is only refracted at the surface of a lens, the angle of refraction does not depend on the thickness but only on the angle between the two surfaces of a lens. Therefore, the Fresnel lens maintains its optical properties, although the image quality is somewhat affected by the step structure.
- Fresnel lenses are used where weight or dimensions are critical and degraded imaging quality can be tolerated. Examples are ship's lanterns or lighthouses. Fresnel lenses can also be pressed from plastic and are then used in daylight projectors, car rear windows and simple hand loupes. In the case of the ring lamp according to the present invention, a further, particularly advantageous embodiment is achieved in that the Fresnel lens is formed as a flexible film. Due to the small thickness of the Fresnel lens pressed as a film, it can be bent and adapted to the inner radius of the hollow cylinder forming the light source.
- the focal length of the Fresnel lens is designed to be equal to the distance between the light emitting diodes and the Fresnel lens, the light rays of the light emitting diodes from the Fresnel lens are accurately deflected into the radial plane of the hollow cylinder and thereby the thickness of the lens at maximum utilization determined by the luminous flux supplied by the LEDs.
- the distance can also be varied to achieve other scattering effects.
- a next advantageous development of the ring lamp according to the invention results when the lens system has a further focusing lens, which is formed as a third, smooth-walled, unstructured hollow cylinder having the same length as the one focusing lens and arranged with this axis and length congruent is.
- the outer radius of this third hollow cylinder serves as a receptacle for the Fresnel lens, whose flexibility requires a rigid body as a forming contact surface.
- the lens formed by the smooth-walled and unstructured third hollow cylinder scatters the light rays of the luminous means to a slight extent horizontally and, due to the superposition of the elementary cone cones, ensures a more even illumination in the interior of the ring light.
- Hollow cylinder formed further lens remains free. This is the prerequisite for use underwater.
- the sensitive electrical parts are effectively protected from the seawater and the flow channel in the interior of the ring light, in which the lens is generated and the objects to be imaged can move undisturbed, remains free.
- the outer cylindrical wall is formed by the light source designed as a hollow cylinder and the inner cylindrical wall is formed by the further focusing lens designed as a third hollow cylinder.
- the hollow cylinder forming the light source is bounded in this case by a cylindrical, pressure-resistant outer wall, on the inside of which the light-emitting diodes are arranged.
- the Fresnel lens forming further hollow cylinder marked with its outer radius of the inner radius of the light source.
- the third hollow cylinder forming the further lens which receives the Fresnel lens on its outer radius, is designed as a pressure-resistant inner wall of the housing and, with its inner radius, simultaneously designates the inner radius of the housing and thus the ring light.
- a pressure-resistant designed as a ring with opening lid at the top and bottom of the hollow cylinder completes the housing and defines the overall dimensions of the ring light.
- the outer radii of the lids correspond to the outer radius of the light source and the inner radii of the lids correspond to the inner radius of the further lens.
- the lids must be sealed against the outer and inner cylindrical walls.
- an aperture diaphragm is useful for further control of the light radiation with respect to a low-scattered defined lens.
- the cover seal and the aperture diaphragm can be combined particularly advantageously if the aperture diaphragm is inserted as an O-ring element which adjoins the annular cover and is inserted as an inner wall in the end faces of the third hollow cylinder forming the further focusing lens. Seal is formed.
- O-rings ie O-rings, in matching grooves into consideration. With them, the pressure-resistant housing can be easily opened for maintenance purposes and reseal, they are inexpensive and their operating conditions are well known.
- a particularly advantageous, special embodiment of the ring lamp according to the invention results when the outer radius of the pressure-resistant housing in a range of 100 mm to 150 mm and its inner radius in a range of 40 mm to 60 mm and the length of the light source and the Lens system forming hollow cylinder not more than 10 mm and the total length of the ring light is not more than 40 mm. It is about here by example dimensions, the indication of the general use of the ring lamp according to the invention in any other dimensions in no way limits.
- Light-emitting diodes have a high degree of efficiency and a particularly high life expectancy. They thus generate only a small heat loss and have a life that regularly exceeds the useful life of the other components.
- Light-emitting diodes are small and a plurality of them can be arranged close to one another to form the light source. Its small diameter makes it possible to form a hollow cylinder of very small height, as e.g.
- LEDs discharge light, incandescent
- laser light insufficient illumination
- the spectrum of the light emitted by the LEDs depends on the task that is to be fulfilled with the ring light. In the standard case, it can be white light whose spectral distribution plays only a minor role for ease of illustration.
- Examinations can also be light with exactly defined spectrum or individual spectral colors.
- light-emitting diodes When using light-emitting diodes as the light source in the light source, these can be arranged with their longitudinal axis directly in the emission direction, ie perpendicular to the axis of the hollow cylinder forming the light source. Due to the linear expansion of the LEDs then the outer diameter of the Ring light and thus the resulting in water currents back pressure correspondingly large.
- a particularly advantageous development of the ring lamp according to the invention results when the light source has a light source radiating in the direction of the axis of the hollow cylinder forming the light source and a peripheral deflection mirror arranged at 45 °.
- the light-emitting diodes can then be arranged with their longitudinal axis parallel to the axis of the hollow cylinder and thus the outer diameter of the ring light can be reduced.
- the rotating mirror deflects the light by 90 ° in the light emission direction required perpendicular to the axis of the hollow cylinder.
- the length of the emission surface thus no longer corresponds to the length of the hollow cylinder forming the light source, but only the length of the projection surface of the mirror. This is therefore chosen according to the desired thickness of the lens.
- the length of the ring light is somewhat larger due to this arrangement, but at a reduced and thus more favorable outside diameter.
- the curved mirror acts in this arrangement as a slight concave mirror, so that a more favorable deflection of the fanned light beams incident from the light beam takes place in the direction of the central axis of the hollow cylinder.
- FIG. 1 shows a plan view of a ring light without an upper lid
- FIG. 2 shows a section along the marking XX in FIG. 1
- Figure 3 is a perspective view of a detail of
- Figure 5 shows an embodiment of the ring light with 45 ° deflection mirror.
- Figure 1 shows a ring light RL for possible use in a video plankton recorder in plan view without the top cover DO.
- the light source LQ is arranged, which is designed as a hollow cylinder H1.
- Its outer contour A1 at the same time marks the outer boundary AG of the pressure-tight housing DG enclosing the ring light RL.
- Its inner contour 11 is at the same time the outer contour A2 of the further hollow cylinder H2 forming the one focussing lens LE.
- the one focusing lens LE is formed as a flexible Fresnel lens FL. Trained as a hollow cylinder H2 Fresnel lens FL is firmly applied with its inner contour 12 to the outer contour A3 of the further focusing lens LW forming hollow cylinder H3.
- the further focusing lens LW is a simple, not further structured body which forms with its inner contour 13 at the same time the inner boundary IG of the ring light RL enclosing pressure-resistant housing DG.
- the Fresnel lens FL and the further lens LW together form the lens system LY.
- the interior IB of the ring light RL which is located within the inner boundary IG of the pressure-tight housing DG, remains open at the ends and represents the illuminated by the light source LQ flow channel SK, which serves the observation and imaging of passing objects.
- the light source LQ has light-emitting diodes LD as the light source LM.
- the light-emitting diodes LD are arranged uniformly distributed at an intermediate radius ZR of the light source LQ designed as a hollow cylinder H1, which at the same time forms the inner boundary of the outer wall WA of the pressure-tight housing DG enclosing the ring light RL.
- the light emitted from the LEDs LD light LL traverses the air space L1 in the hollow cylinder H1, is picked up by the Fresnel lens FL and focused on the center ZB of the ring light RL.
- the further lens LW which forms the inner wall Wl of the housing DG and has a biconvex shape, the light LL is further compressed.
- the light LL finally exits into the interior IB of the ring light RL and spreads uniformly because of multiple reflections in the radial plane RE on the opposite wall of the further lens LW.
- the walls WA, WI of the housing DG have screw holes SL, through which they are bolted to the covers DO 9 DU and completed to the housing DG.
- O-ring seals OD are provided between the walls WA, WI and the covers DO, DU. They are located in grooves ON, which are embedded in the walls WA 5 WI.
- the O-ring seals OD in the inner wall Wl serve at the same time as an annular aperture AB centered in the beam path behind the one focusing lens LE for the light LL to illuminate the limited volume BV and thus further reduce the light scattering outside the lens LS, for which the plane of the drawing simultaneously represents the radial plane RE.
- Figure 2 shows a section along the line XX in Figure 1. Not shown reference numerals are shown in FIG. It is the upper and lower lid DO 1 DU shown with their openings OE, which clamp together with screws SG in the screw holes SL the pressure-resistant housing DG. Also, the arrangement of the O-ring seals OD is clear, which lie in the grooves ON the further focusing lens LW of the lens system LY and the outer wall WA and on the one hand protect the interior of the light source LQ from penetrating water and on the other hand as the aperture AB the light Limit LL to the lens LS and thus to the limited volume BV and reduce the scattering. In short Hollow cylinders 141,142,143, the total length HG of Ringieuchte RL and thus the length HL of the lens LS is low.
- an outer radius A1 of 100 to 150 mm, an inner radius 13 of 40 to 60 mm, an overall length HG of less than or equal to 40 mm and a length HL of the light disk LS of less than or equal to 10 mm are called.
- Other dimensions are also possible.
- Figure 3 shows a perspective view of a detail of Figure 1. It serves to further illustrate the structure of the ring light RL and shows the height of the radiating surface AF, which corresponds in this design, the length L1 of the hollow cylinder H1.
- the grooves ON are shown with the O-ring seals OD in the walls WA 1 WI acting as aperture stops AB and the arrangement of the screw holes SL outside the O-ring seals OD with respect to the air space LR.
- FIG. 4 shows the optical path of the light LL from the light-emitting diode LD on the outer wall WA through the air space L1, through the lens system LY with the one focusing lens LE, which is designed as a Fresnel lens FL, and the further focusing lens LW, which is simpler , Not further structured body is formed in the interior IB of the ring light RL. Again, the influence of the O-ring seal OD in the slots ON as an aperture diaphragm AB clearly.
- FIG. 5 shows an embodiment of the ring light with a 45 ° deflection mirror.
- the ring light RL has a reduced outer diameter but a greater length than in Figure 2. This is achieved by the alignment of the LEDs LD parallel to the central axis of the light source LQ forming hollow cylinder H1 and the arrangement of a set at 45 °, rotating deflection mirror AS.
- the length L1 of the light source LQ forming hollow cylinder H1 is increased by this measure, the Outer diameter of the ring light RL at the outer boundary AG but significantly reduced and thus improves the flow characteristics.
- the deflection mirror AS acts by the curvature of its circular shape as a concave mirror and has a focusing effect for the fan light beam of the light-emitting diode LD.
- center For example, center
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Stroboscope Apparatuses (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005050722A DE102005050722B4 (de) | 2005-10-19 | 2005-10-19 | Ringleuchte mit begrenztem Ausleuchtungs-Volumen und deren Verwendung |
PCT/DE2006/001657 WO2007045200A1 (de) | 2005-10-19 | 2006-09-15 | Ringleuchte zur ausleuchtung eines begrenzten volumens und deren verwendung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1938087A1 true EP1938087A1 (de) | 2008-07-02 |
Family
ID=37492208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06805311A Withdrawn EP1938087A1 (de) | 2005-10-19 | 2006-09-15 | Ringleuchte zur ausleuchtung eines begrenzten volumens und deren verwendung |
Country Status (4)
Country | Link |
---|---|
US (1) | US7976175B2 (de) |
EP (1) | EP1938087A1 (de) |
DE (1) | DE102005050722B4 (de) |
WO (1) | WO2007045200A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202008009783U1 (de) * | 2008-07-22 | 2008-09-25 | Sattler Gmbh | Leuchte |
US8602790B1 (en) | 2010-06-04 | 2013-12-10 | Museum of Mathematics | Demonstration tools for geometric properties |
DE102012211992A1 (de) * | 2012-07-10 | 2014-01-30 | Siemens Aktiengesellschaft | Anordnung für die laserbasierte Partikeldetektion |
DE102012111222A1 (de) | 2012-11-21 | 2014-05-22 | Dirk Könecke | Leuchte |
US11961379B2 (en) * | 2019-12-20 | 2024-04-16 | Siemens Schweiz Ag | Measurement chamber for mounting on a smoke detection unit, having a light trap according to the principle of a fresnel stepped lens |
CN113494690B (zh) * | 2020-04-02 | 2023-06-27 | 中国科学院深圳先进技术研究院 | 一种照明器、成像系统及成像系统控制方法 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4380392A (en) * | 1981-03-18 | 1983-04-19 | Karabegov Mikhail A | Method and apparatus for calibration of instruments serving to count and to determine the size of particles suspended in dispersion medium |
DD232552A1 (de) | 1983-08-04 | 1986-01-29 | Adw Ddr | Verfahren und einrichtung zur zaehlung und klassifizierung von dispergierten teilchen |
DD221861A1 (de) | 1984-01-25 | 1985-05-02 | Adw Ddr | Beleuchtungseinrichtung zur erzeugung eines lichtstreifens |
US4893223A (en) * | 1989-01-10 | 1990-01-09 | Northern Telecom Limited | Illumination devices for inspection systems |
US5092675A (en) * | 1989-11-14 | 1992-03-03 | Pacific Scientific Company | Vacuum line particle detector with slab laser |
US5396333A (en) * | 1992-05-21 | 1995-03-07 | General Electric Company | Device and method for observing and analyzing a stream of material |
US5580163A (en) * | 1994-07-20 | 1996-12-03 | August Technology Corporation | Focusing light source with flexible mount for multiple light-emitting elements |
FR2739692B1 (fr) * | 1995-10-09 | 1997-12-12 | Europ Agence Spatiale | Appareil de mesure de retombees de particules sur une surface, utilisant une plaque temoin |
US5690417A (en) * | 1996-05-13 | 1997-11-25 | Optical Gaging Products, Inc. | Surface illuminator with means for adjusting orientation and inclination of incident illumination |
DE19724364C2 (de) | 1997-06-10 | 1999-04-08 | Karlsruhe Forschzent | Verfahren und Vorrichtung zur Ermittlung von Partikelgrößen und Partikelgeschwindigkeiten |
JP3726150B2 (ja) * | 1997-06-12 | 2005-12-14 | 株式会社ダイレクトコミュニケーションズ | 微細領域の照明装置 |
US6022124A (en) * | 1997-08-19 | 2000-02-08 | Ppt Vision, Inc. | Machine-vision ring-reflector illumination system and method |
DE19736172B4 (de) | 1997-08-20 | 2004-02-05 | Palas Gmbh Partikel- Und Lasermesstechnik | Verfahren und Vorrichtung zur Analyse von Teilchen |
US5897195A (en) * | 1997-12-09 | 1999-04-27 | Optical Gaging, Products, Inc. | Oblique led illuminator device |
DE29813109U1 (de) | 1998-07-23 | 1998-10-22 | Lieberwirth, Peter Claus, Dipl.-Ing. (FH), 35619 Braunfels | Optische Beleuchtungsvorrichtung zur Erzeugung eines schmalen und langen Lichtbandes |
CA2314679A1 (en) | 1999-07-28 | 2001-01-28 | William Kelly | Improvements in and relating to ring lighting |
DE29921159U1 (de) * | 1999-12-01 | 2000-02-24 | Ust Umwelt Systemtechnik Gmbh | Transpondergestützte Probenidentifizierungseinrichtung |
DE29921150U1 (de) | 1999-12-01 | 2000-02-10 | Eckweiler Wolfgang | Ringleuchte für schattenfreie Reprofotografie |
DE10211768A1 (de) | 2000-12-22 | 2003-10-02 | Friedrich Burckhardt | Ringleuchte |
JP3496644B2 (ja) * | 2001-01-12 | 2004-02-16 | シーシーエス株式会社 | 検査用照明装置 |
DE10129972A1 (de) | 2001-06-21 | 2003-01-09 | Thomas Buechner | Beleuchtungseinrichtung |
US7357529B2 (en) * | 2002-02-21 | 2008-04-15 | Optical Gaging Prod Inc | Variable incidence oblique illuminator device |
EP1411290A1 (de) * | 2002-10-18 | 2004-04-21 | Altman Stage Lighting Co.,Inc. New York Corporation | Beleuchtungssytem mit Leuchtdioden |
DE10356384A1 (de) * | 2003-12-03 | 2005-06-30 | E. Zoller GmbH & Co. KG Einstell- und Messgeräte | Werkzeugbeleuchtungsvorrichtung |
DE102004018439A1 (de) * | 2004-04-08 | 2005-10-27 | Upmeyer, Arnold, Prof. Dr. | Leuchte für eine Unterwasserkamera |
-
2005
- 2005-10-19 DE DE102005050722A patent/DE102005050722B4/de not_active Expired - Fee Related
-
2006
- 2006-09-15 EP EP06805311A patent/EP1938087A1/de not_active Withdrawn
- 2006-09-15 US US12/090,812 patent/US7976175B2/en not_active Expired - Fee Related
- 2006-09-15 WO PCT/DE2006/001657 patent/WO2007045200A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007045200A1 * |
Also Published As
Publication number | Publication date |
---|---|
US7976175B2 (en) | 2011-07-12 |
US20090016058A1 (en) | 2009-01-15 |
WO2007045200A1 (de) | 2007-04-26 |
DE102005050722B4 (de) | 2010-10-14 |
DE102005050722A1 (de) | 2007-05-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE60303328T2 (de) | Ringförmige Lichtquelle | |
EP2789900B1 (de) | Lichtmodul für eine kraftfahrzeugbeleuchtungseinrichtung | |
EP2151622B1 (de) | Beleuchtungsvorrichtung mit veränderlichem Abstrahlwinkel | |
DE102005050722B4 (de) | Ringleuchte mit begrenztem Ausleuchtungs-Volumen und deren Verwendung | |
DE3906555A1 (de) | Auflicht-objektbeleuchtungseinrichtung | |
EP2650597A2 (de) | Leuchte | |
DE2152086A1 (de) | Anordnung zur Ausrichtung von Licht fuer ein optisches Beleuchtungsfasersystem | |
DE102004018439A1 (de) | Leuchte für eine Unterwasserkamera | |
DE4035799C2 (de) | Vorrichtung zur dreidimensionalen optischen Untersuchung eines Objektes | |
DE102012214138A1 (de) | Lichtmodul | |
DE102019216130A1 (de) | Beleuchtungsreflektoreinrichtung zum Beleuchten einer Probe, optische Analysevorrichtung zum Analysieren von Licht von einer Probe und Verfahren zum Herstellen einer Beleuchtungsreflektoreinrichtung | |
DE102016109647A1 (de) | Linse und Leuchte mit einer solchen Linse | |
DE102004011987A1 (de) | Optische Leitung zum Lenken von Licht auf eine Oberfläche | |
DE102018201980A1 (de) | Beleuchtungsvorrichtung für ein Kraftfahrzeug | |
DE102013222481A1 (de) | Optisches Element für eine Leuchte, sowie Leuchte | |
EP2500716A2 (de) | Vorrichtung zur optischen Erfassung von Prüfobjekten | |
DE102009015424A1 (de) | Beleuchtungsvorrichtung | |
WO2018220069A1 (de) | Halbleiterlichtquelle | |
EP3623695A1 (de) | Leuchte sowie verfahren zur steuerung der abstrahlcharakteristik derselben und lichtmischleiter und leuchte mit lichtmischleiter | |
DE102014204691A1 (de) | Bildaufnahmevorrichtung, insbesondere zur Fahrzeugvermessung | |
DE102012207725A1 (de) | Ringförmiges Beleuchtungssystem | |
EP1445638B1 (de) | Scheinwerfer, insbesondere Taschenleuchte, mit Leuchtdioden und dioptrischen Einrichtungen | |
DE602004012652T2 (de) | Vorrichtung zur Einstellung der Lichtintensität für Projektoren mit Entladungslampe | |
DE2023739A1 (de) | ||
DE102019123515B4 (de) | Kraftfahrzeugscheinwerfer mit zwei Projektionslichtmodulen unterschiedlicher Brennweite und gleich breit ausgeleuchteten Lichtaustrittslinsen |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20080317 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: STIFTUNG ALFRED-WEGENER-INSITUT FUER POLAR UND MEE |
|
17Q | First examination report despatched |
Effective date: 20090119 |
|
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: G01N 21/01 20060101ALI20120830BHEP Ipc: F21S 8/00 20060101ALI20120830BHEP Ipc: G01N 21/53 20060101AFI20120830BHEP Ipc: G01N 15/14 20060101ALI20120830BHEP Ipc: G01N 15/10 20060101ALI20120830BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20130206 |