EP0967583A2 - Optoelektronische Sensoreinrichtung - Google Patents
Optoelektronische Sensoreinrichtung Download PDFInfo
- Publication number
- EP0967583A2 EP0967583A2 EP99109753A EP99109753A EP0967583A2 EP 0967583 A2 EP0967583 A2 EP 0967583A2 EP 99109753 A EP99109753 A EP 99109753A EP 99109753 A EP99109753 A EP 99109753A EP 0967583 A2 EP0967583 A2 EP 0967583A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflection
- expansion
- sensor device
- designed
- mirror
- 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.)
- Granted
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
- G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
- G08B13/184—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using radiation reflectors
Definitions
- the invention relates to an optoelectronic sensor device for monitoring a protection area, at least with one transmitting element, one Receiving element and a reflection unit with at least one first and a second reflection element, one of the transmission element emitted along the protected area to the first reflection element Transmit light bundle by means of the first reflection element as a deflecting light beam to the second reflection element and by means of of the second reflection element as a reception light bundle along the Protection area can be deflected to the receiving element.
- Such sensor devices are, for example, at the edge of a security area arranged a machine tool, if necessary To enter this security area to be detected by factory personnel and trigger a warning signal or a shutdown signal.
- the Reflection unit serves the Reflection unit for deflecting the transmitted light beam first around an offset distance and finally towards the receiving element, so that from the transmit light beam and from the receive light beam simultaneously different sections of the protected area are monitored can.
- a disadvantage of the known optoelectronic sensor devices The type described is that, especially with a large offset distance the adjustment of their reflection units for exact redirection of the transmitted light beam on the receiving element difficult and often can only be accomplished by trained specialist personnel.
- their production has been proven expensive because their reflection elements at certain angles to each other must be precisely arranged. A subsequent change in Location of these reflection elements, for example to change the offset distance, is not possible without complex adjustment measures.
- This object is achieved in that at least one of the reflection elements of the reflection unit as an expansion reflector trained to deflect and expand the light beam in question is.
- the reflection elements are used in the sensor device according to the invention So not only to redirect the light beam in question, but at least one of the reflection elements causes in addition to the deflection an expansion of the light beam.
- This widening of a light beam advantageously enlarges it Angular availability.
- the light beam cannot be set with the same accuracy as with a light beam of comparatively small beam diameter.
- the adjustment can thus be carried out comparatively quickly, and it can also be done by unskilled personnel, especially by the operator of the sensor device, for example after this to change the course of the transmit and receive light beams has been converted.
- the invention Sensor device flexible in different environmental conditions can be used because the deflection of the light bundle by means of the reflection unit for example, effects of temperature expansion or vibrations large machine tools, on which or adjacent to which the reflection unit is attached, not or only slightly disturbed becomes.
- the sensor device Compared to the use of a transmission light bundle that has been expanded from the outset the sensor device according to the invention has the advantage that the light beam only at the for the adjustment of the sensor device critical sections of the beam path takes place, which means that with a Widening of the light bundle is accompanied by a reduction in its light intensity can be kept comparatively low.
- the invention works particularly well for comparative purposes short distances of each widened light beam.
- the expansion reflector of the sensor device according to the invention is preferably designed as a curved expansion mirror, in particular as essentially convex expansion mirror. Also one essentially concave curvature of the expansion mirror is possible.
- a Such an expansion mirror can be produced in a simple manner, for example by injection molding or deep drawing and subsequent vapor deposition with a reflective layer.
- a widening mirror suitable for the sensor device according to the invention causes the expansion of one reflected on its curved surface Light beam, depending on the radius of curvature the curvature of the mirror surface acted upon by the light beam.
- the radius of curvature of the curvature can be spherical, i.e. in cross section be provided as a radius of a circle, toric or aspherical. It is possible to use different radii of curvature strong widening of a light beam at different, with respect to provide reflection elements arranged one behind the other of the beam path.
- the expansion of the light beam by the expansion reflector can either along essentially a single direction perpendicular to the longitudinal axis of the light beam deflected by the expansion reflector take place, or along essentially two each to said Longitudinal axis and directions perpendicular to each other.
- the expansion reflector can be used to expand the light beam as a convex expansion mirror with the shape of a part the lateral surface of a cylinder.
- the expansion reflector as Expansion mirror essentially in the form of part of the surface a ball is formed.
- a widening mirror can be used in a corresponding manner the shape of part of the lateral surface of a torid or Own barrel body, that is, a body that results from the rotation of one curved line, for example a circular line or a parabola.
- the expansion mirror can take the form of part of the Have surface of a body that is similar to a sphere or Barrel body is formed, but with consistently or at least partially aspherical radii of curvature.
- the expansion mirror is not is formed purely spherical, the expansion of a reflected Beam of light in different directions perpendicular to the longitudinal axis of the reflected light beam to different degrees, corresponding to the each assigned radius of curvature of the surface of the expansion mirror.
- the expansion reflector As an alternative to designing the expansion reflector as a curved one Expansion mirrors can be used to achieve any other optical elements the effect of a redirection and a simultaneous expansion of the Light beam can be used. In particular, it is possible to use the expansion reflector as a combination of a flat mirror and a diverging lens to train.
- the reflection unit has exactly two reflection elements, and the transmitting element and the receiving element on the one hand or the reflection unit on the other hand are essentially opposite to each other Sides of the protection area arranged so that the transmit light beam and the received light beam in opposite to each other Beam directions run between these two sides.
- the two light beams can be parallel and spaced apart by an offset distance run to each other, the reflection unit ultimately causes a U-shaped deflection of the transmitted light beam by 180 °.
- transmit and receive light bundles can also have any angle take each other and / or cut each other.
- the reflection unit While it is particularly accurate in the embodiment of the invention two reflection elements is preferred if all reflection elements the reflection unit are designed as a curved expansion mirror it is also possible to use some of the reflection elements in a conventional manner train, for example as a flat mirror or as a roof edge element.
- the reflection unit can also do more than that have two preferred reflection elements.
- the Deflection of the transmitted light beam by means of the two reflection elements mentioned to the receiving element at least indirectly, namely about the additional reflection element or elements.
- a semi-transparent mirror can be provided, the one Part of the light beam that impacts him for additional enforcement the protection area with a light beam in the direction of an additional one Redirects reception elements.
- the transmitting element and the receiving element on opposite sides of the Protection area are arranged while the reflection unit essentially is located in the center of the protected area and the redirection of the transmitted light beam by an offset distance, but essentially without changing direction, so that the light beam, for example follows a step-like course.
- the invention also extends to at least two reflection elements having reflection unit, which in a corresponding manner as described above for the sensor unit according to the invention for deflection of a transmitted light bundle on the reflection elements to one Receiving element is provided, and in the at least one of the reflection elements is designed as an expansion reflector in addition to Deflection causes an expansion of the light beam in question.
- This Reflection unit can be constructed essentially, as in the above Described in connection with the sensor device according to the invention. In particular, it is preferred if the expansion reflector as convex expansion mirror is formed.
- FIG. 1a shows an optoelectronic sensor device according to the invention in perspective side view.
- This sensor device has a Transmitting element 11 and a receiving element arranged adjacent to it 13, as well as one arranged opposite these elements 11, 13 Reflection unit 15 with a within a common housing arranged first expansion mirror 17 and second expansion mirror 19th
- a transmission light bundle 21 extends from the transmission element 11 in one Transmit beam direction A to the first expansion mirror 17, from which it as a deflecting light bundle 23 in a deflecting beam direction B to the second Expansion mirror 19 is deflected.
- This deflecting light bundle 23 is from the second expansion mirror 19 in a received beam direction C deflected that it as the receiving light bundle 25, the receiving element 13 acted upon.
- axes X, Y, Z of an orthogonal coordinate system are also shown drawn.
- the send beam direction A and the receive beam direction C run in opposite or parallel directions to the X-axis, namely spaced apart by an offset distance D.
- the deflecting beam direction B of the deflected at the first expansion mirror 17 Beam 23 runs in opposite directions parallel to the Z axis, that this light beam 23 and the transmit and receive light beams 21 or 25 U-shaped essentially within a common one Level.
- the two expansion mirrors 17, 19 are inside the housing Reflection unit 15 along the Z-axis spaced apart.
- the housing has suitable, not shown in the figures Openings so that the transmit light beam 21 the first expansion mirror 17 act unhindered and the reception light bundle 25 unhindered by the second expansion mirror 19 in the received beam direction C can run.
- the two expansion mirrors 17, 19 each have the shape of a part the outer surface of a cylinder, with the reflective side of the mirror 17, 19 corresponds to the convex outside of this lateral surface. Consequently are two opposite side edges of the two mirrors 17, 19 curved in a circular line, and the other two opposite each other Side edges are essentially straight and parallel to each other. Accordingly, a light beam is expanded 23, 25, which is deflected by one of the expansion mirrors 17, 19, respectively in a direction perpendicular to the beam direction of this light beam 23, 25, namely along the course of the curved side edges and perpendicular to the course of the straight side edges.
- the two expansion mirrors 17, 19 are in this way relative to one another and aligned with the light beams 21, 23, 25 that the first expansion mirror 17 and the second expansion mirror 19 each an expansion of the cross section of the deflecting light bundle 23 or of the receiving light bundle 25 in the Y direction, i.e. an expansion of the Cross section along and against the Y axis.
- the expansion of the Receiving light bundle 25 in the Y direction can be seen in Fig. 1a.
- 1b shows the reflection unit 15 and the beam path of the light beams 21, 23, 25 in a schematic cross-sectional side view.
- the straight forward Course of the cross section of the expansion mirror 17, 19 corresponds the course of the two straight side edges.
- the sensor device shown in Fig. 1a is used to monitor a between transmitting element 11 and receiving element 13 on the one hand and reflection unit 15 protection area on the other hand. For that it will Transmit light bundle 21 continuously or in a fast manner in a known manner Pulses emitted by the transmitting element 11 while the receiving element 13 continuously or synchronously with the reception of the received light beam 25 monitors. If this reception is due to a Interruption of the transmitted light beam 21 or the received light beam 25 is interrupted, there is an assigned to the sensor device, a corresponding evaluation unit, not shown in FIG. 1a Output signal from, for example a warning, shutdown or control signal.
- Fig. 1a shows the sensor device in an ideally adjusted position, i. H. the Beam 21 is transmitted after deflection at the two expansion mirrors 17, 19 as reception light bundle 25 on the reception element 13 reflects that the longitudinal axis C of the received light beam 25 runs essentially centrally through the receiving element 13.
- the receiving element 13 remains with a certain one Tilting of the entire reflection unit 15 is still sufficient Way acted upon by the received light beam 25.
- this advantageous property of the sensor device according to the invention is a tilting of the reflection unit 15 in FIGS. 2a and 2b Y-axis and in FIGS. 3a and 3b a rotation of the reflection unit 15 around the Z axis.
- FIGS. 1a and 1b show the sensor device in a perspective side view or the reflection element 15 in cross-sectional side view, wherein the reflection element 15 is tilted with respect to the Y axis.
- the deflecting light beam 23 and the transmit light beam 21 and the receive light beam 25 are therefore no longer at the angle shown in FIGS. 1a and 1b of 90 ° to each other.
- the receiving element 13 is still in a measure sufficient to monitor the protection area Receiving light bundle 25 is applied. This is due to the well-known 180 ° reflection a 90 ° roof reflection unit, which the two expansion mirrors 17, 19 due to their relative angle position shown in Fig. 2b of 90 ° to each other. This will make the transmit light beam 21 still ultimately reflected by 180 °.
- the reflection unit 15 is the assembly of the two Mirrors 17, 19 compared to conventional reflection units plane mirrors, however, much easier, since the beam path B, C of deflecting light bundle 23 and received light bundle 25 due to this Widening is relatively uncritical, especially with large offset distances behaves towards deviations in the relative angle position of the two Expansion mirrors 17, 19 from their ideal position of 90 °. this makes possible Greater tolerances in the manufacture and adjustment of the invention Reflection unit 15.
- the cross-sectional side view according to FIG. 2b also shows that the offset distance D between the transmitted light beam 21 and the received light beam 25 due to the tilting of the reflection unit 15 and thus the deflecting light beam 23 is shortened, so that the longitudinal axis C of the received light bundle 25 with increasing such tilting away from the receiving element 13 in the direction of the transmitting element 11, i.e. migrates along the Z axis.
- This effect of the migration of the received light bundle 25 can be caused by a reflection unit 15 according to the invention can be compensated as they is shown in a cross-sectional side view in Fig. 2c.
- Reflection unit 15 is the first expansion mirror 17 compared to that twisted second expansion mirror 19 so that the two straight lines Side edges of the first expansion mirror 17 to the straight line Side edges of the second expansion mirror 19 in a view along make an angle of 90 ° with respect to the Z axis. Accordingly shows the side view of FIG. 2c a curved cross section of the first expansion mirror 17, corresponding to the curved ones Side edges of this mirror 17.
- the first expansion mirror 17 causes an expansion of the cross section of the deflecting light bundle 23 in the X direction.
- This widening appears on the second widening mirror after deflection 19 as widening of the reception light bundle 25 in the Z direction, in addition to that caused by the second expansion mirror 19 Expansion in the Y direction.
- the expansion of the reception light bundle 25 in the Z direction can the explained effect of the migration of the received light beam Compensate 25 from the receiving element 13. Therefore allowed the reflection unit 15 according to the invention due to its design with arched expansion mirrors 17, 19 compared to a known one Reflection unit with flat mirrors a stronger tilt and 15 more generous assembly tolerances for the alignment of the reflection unit.
- FIGS. 1a and 1b show the sensor device according to FIGS. 1a and 1b in one perspective side view or in a schematic top view, wherein the reflection unit 15 is rotated with respect to the Z axis.
- the receiving element 13 While due to the rotation of the reflection unit 15, the received beam direction C with respect to the receiving element 13 in the Y direction is pivoted laterally, the receiving element 13 due to the expansion of the received light bundle 25 in the Y direction is nevertheless subjected to light.
- a compensation of such a rotation of the reflection unit 15 is also possible through a conventional triple reflection unit a reflection element as a correspondingly arranged roof edge element is trained.
- this well-known triple reflection unit is disadvantageously difficult to adjust, especially with large offset distances and especially if it should be possible, different offset distances adjust.
- an expansion mirror 17 requires 19 of the reflection unit 15 according to the invention is only a comparative one low accuracy in its arrangement within the reflection unit 15.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
Abstract
Description
- Fig. 1a und 1b
- eine perspektivische Seitenansicht einer erfindungsgemäßen Sensoreinrichtung mit einer Reflexionseinheit bzw. eine Querschnitts-Seitenansicht dieser Reflexionseinheit,
- Fig. 2a und 2b
- eine perspektivische Seitenansicht der Sensoreinrichtung gemäß Fig. 1 mit bezüglich einer ersten Achse verkippter Reflexionseinheit bzw. eine Querschnitts-Seitenansicht dieser Reflexionseinheit,
- Fig. 2c
- eine Querschnitts-Seitenansicht einer Reflexionseinheit mit im Vergleich zur Reflexionseinheit gemäß Fig. 2b unterschiedlich angeordneten Reflexionselementen, und
- Fig. 3a und 3b
- eine perspektivische Seitenansicht der Sensoreinrichtung gemäß Fig. 1 mit bezüglich einer weiteren Achse verkippter Reflexionseinheit bzw. eine schematische Draufsicht auf diese Reflexionseinheit.
- 11
- Sendeelement
- 13
- Empfangselement
- 15
- Reflexionseinheit
- 17
- erster Aufweitungsspiegel
- 19
- zweiter Aufweitungsspiegel
- 21
- Sende-Lichtbündel
- 23
- Umlenk-Lichtbündel
- 25
- Empfangs-Lichtbündel
- A
- Sende-Strahlrichtung
- B
- Umlenk-Strahlrichtung
- C
- Empfangs-Strahlrichtung
- D
- Versatzabstand
- X
- Achse
- Y
- Achse
- Z
- Achse
Claims (11)
- Optoelektronische Sensoreinrichtung zur Überwachung eines Schutzbereichs,
zumindest mit einem Sendeelement (11), einem Empfangselement (13) sowie einer Reflexionseinheit (15) mit wenigstens einem ersten (17) und einem zweiten Reflexionselement (19),
wobei ein von dem Sendeelement (11) entlang des Schutzbereichs zu dem ersten Reflexionselement (17) ausgesendetes Sende-Lichtbündel (21) mittels des ersten Reflexionselements (17) als ein Umlenk-Lichtbündel (23) zu dem zweiten Reflexionselement (19) und mittels des zweiten Reflexionselements (19) als ein Empfangs-Lichtbündel (25) entlang des Schutzbereichs zu dem Empfangselement (13) umlenkbar ist,
dadurch gekennzeichnet,
daß wenigstens eines der Reflexionselemente (17, 19) als Aufweitungsreflektor zur Umlenkung und Aufweitung des betreffenden Lichtbündels (23, 25) ausgebildet ist. - Optoelektronische Sensoreinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Aufweitungsreflektor (17, 19) als gewölbter Aufweitungsspiegel, insbesondere als im wesentlichen konvex gewölbter Aufweitungsspiegel ausgebildet ist. - Optoelektronische Sensoreinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Aufweitungsreflektor (17, 19) zur Aufweitung des von ihm umgelenkten Lichtbündels (23, 25) entlang im wesentlichen einer einzigen Richtung senkrecht zu der Längsachse (B, C) dieses Lichtbündels ausgebildet ist,
wobei der Aufweitungsreflektor insbesondere als ein gewölbter Aufweitungsspiegel (17, 19) mit im wesentlichen der Form eines Teils der Mantelfläche eines Zylinders ausgebildet ist. - Optoelektronische Sensoreinrichtung nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet,
daß der Aufweitungsreflektor zur Aufweitung des von ihm umgelenkten Lichtbündels entlang des gesamten Umfangs des Querschnitts dieses Lichtbündels ausgebildet ist,
wobei der Aufweitungsreflektor insbesondere als ein gewölbter Aufweitungsspiegel mit zwei verschiedenen oder gleichen Krümmungen ausgebildet ist
und/oder im wesentlichen die Form eines Teils der Oberfläche einer Kugel, eines Teils der Mantelfläche eines Tonnenkörpers, vorzugsweise eines Kreis-Tonnenkörpers, eines Teils der Mantelfläche eines Torids oder eines Teils der Mantelfläche eines zumindest teilweise asphärischen Körpers aufweist. - Optoelektronische Sensoreinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Aufweitungsreflektor als Kombination eines im wesentlichen ebenen Spiegels und einer Zerstreuungslinse ausgebildet ist. - Optoelektronische Sensoreinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Reflexionseinheit (15) genau zwei Reflexionselemente (17, 19) aufweist, und
daß die Reflexionseinheit (15) einerseits sowie das Sendeelement (11) und das Empfangselement (13) andererseits sich bezüglich des Schutzbereichs im wesentlichen gegenüberliegend angeordnet sind, wobei das Sende-Lichtbündel (21) und das Empfangs-Lichtbündel (25) innerhalb des Schutzbereichs insbesondere im wesentlichen entgegengesetzt parallel und um einen Versatzabstand (D) beabstandet zueinander verlaufen. - Optoelektronische Sensoreinrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß beide Reflexionselemente (17, 19) als gewölbte Aufweitungsspiegel ausgebildet sind. - Optoelektronische Sensoreinrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß eines der Reflexionselemente als ein im wesentlichen ebener Spiegel und das andere Reflexionselement als ein gewölbter Aufweitungsspiegel ausgebildet ist. - Optoelektronische Sensoreinrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß eines der Reflexionselemente als ein Dachkant-Element und das andere der Reflexionselemente als ein gewölbter Aufweitungsspiegel ausgebildet ist. - Reflexionseinheit (15) mit wenigstens einem ersten (17) und einem zweiten Reflexionselement (19),
zur Umlenkung eines von einem Sendeelement (11) zu dem ersten Reflexionselement (17) ausgesendeten Sende-Lichtbündels (21) mittels des ersten Reflexionselements (17) zu dem zweiten Reflexionselement (19) und mittels des zweiten Reflexionselements (19) zu einem Empfangselement (13),
insbesondere für eine optoelektronische Sensoreinrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß wenigstens eines der Reflexionselemente (17, 19) als Aufweitungsreflektor zur Umlenkung und Aufweitung des betreffenden Lichtbündels (23, 25) ausgebildet ist. - Reflexionseinheit nach Anspruch 10,
dadurch gekennzeichnet,
daß der Aufweitungsreflektor (17, 19) als gewölbter Aufweitungsspiegel, insbesondere als im wesentlichen konvex gewölbter Aufweitungsspiegel ausgebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19828434 | 1998-06-25 | ||
DE19828434A DE19828434A1 (de) | 1998-06-25 | 1998-06-25 | Optoelektronische Sensoreinrichtung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0967583A2 true EP0967583A2 (de) | 1999-12-29 |
EP0967583A3 EP0967583A3 (de) | 2001-01-10 |
EP0967583B1 EP0967583B1 (de) | 2003-08-13 |
Family
ID=7872057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99109753A Expired - Lifetime EP0967583B1 (de) | 1998-06-25 | 1999-05-18 | Optoelektronische Sensoreinrichtung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0967583B1 (de) |
DE (2) | DE19828434A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1467228A2 (de) * | 2003-04-02 | 2004-10-13 | Sick Ag | Optoelektronische Zugangsabsicherung |
WO2020031674A1 (ja) * | 2018-08-07 | 2020-02-13 | オムロン株式会社 | 多光軸光電センサユニット |
EP4016139A1 (de) * | 2020-12-21 | 2022-06-22 | Leuze electronic GmbH + Co. KG | Sensoranordnung |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10239940A1 (de) * | 2002-08-30 | 2004-03-25 | Sick Ag | Lichtschranke oder Lichtgitter |
DE202010007107U1 (de) | 2010-05-21 | 2011-11-09 | Sick Ag | Aufweitungsreflektor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19533044A1 (de) * | 1994-10-03 | 1996-04-04 | Baumer Electric Ag | Doppeldurchlichtschranke |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4205902A (en) * | 1978-10-12 | 1980-06-03 | The Perkin-Elmer Corporation | Laser beam expander |
US4518232A (en) * | 1983-08-24 | 1985-05-21 | Avco Everett Research Laboratory, Inc. | Method and apparatus for optical beam shaping |
DE9104172U1 (de) * | 1991-04-06 | 1991-07-18 | Leuze Electronic Gmbh + Co, 7311 Owen, De | |
DE29607076U1 (de) * | 1996-04-18 | 1996-08-29 | Sick Optik Elektronik Erwin | Opto-elektronischer Sensor zur Erkennung transparenter Objekte |
DE29701903U1 (de) * | 1997-02-04 | 1997-03-27 | Imos Gubela Gmbh | Meßtechnikretroflektor |
-
1998
- 1998-06-25 DE DE19828434A patent/DE19828434A1/de not_active Withdrawn
-
1999
- 1999-05-18 DE DE59906565T patent/DE59906565D1/de not_active Expired - Lifetime
- 1999-05-18 EP EP99109753A patent/EP0967583B1/de not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19533044A1 (de) * | 1994-10-03 | 1996-04-04 | Baumer Electric Ag | Doppeldurchlichtschranke |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1467228A2 (de) * | 2003-04-02 | 2004-10-13 | Sick Ag | Optoelektronische Zugangsabsicherung |
EP1467228A3 (de) * | 2003-04-02 | 2004-10-20 | Sick Ag | Optoelektronische Zugangsabsicherung |
WO2020031674A1 (ja) * | 2018-08-07 | 2020-02-13 | オムロン株式会社 | 多光軸光電センサユニット |
JP2020024134A (ja) * | 2018-08-07 | 2020-02-13 | オムロン株式会社 | 多光軸光電センサユニット |
EP4016139A1 (de) * | 2020-12-21 | 2022-06-22 | Leuze electronic GmbH + Co. KG | Sensoranordnung |
Also Published As
Publication number | Publication date |
---|---|
EP0967583B1 (de) | 2003-08-13 |
EP0967583A3 (de) | 2001-01-10 |
DE59906565D1 (de) | 2003-09-18 |
DE19828434A1 (de) | 1999-12-30 |
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