DE3719235A1 - Method and device for suppressing the influence of accidental reflections on a target which is marked with reflectors - Google Patents
Method and device for suppressing the influence of accidental reflections on a target which is marked with reflectorsInfo
- Publication number
- DE3719235A1 DE3719235A1 DE19873719235 DE3719235A DE3719235A1 DE 3719235 A1 DE3719235 A1 DE 3719235A1 DE 19873719235 DE19873719235 DE 19873719235 DE 3719235 A DE3719235 A DE 3719235A DE 3719235 A1 DE3719235 A1 DE 3719235A1
- Authority
- DE
- Germany
- Prior art keywords
- target
- reflectors
- marked
- influence
- reflections
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/499—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00 using polarisation effects
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Unterdrückung des Einflusses von ungewollten Reflexionen auf einem mit Reflektoren markierten Ziel.The invention relates to a method for suppressing the influence of unwanted reflections on a target marked with reflectors.
Wenn man ein Ziel mit polarisierter Strahlung beleuchtet - also zum Beispiel mit linear polarisiertem Licht aus Laserdioden - dann treten zwei Arten von Reflexionen am beleuchteten Ziel auf:When you illuminate a target with polarized radiation - for example with linearly polarized light from laser diodes - two types of reflections occur at the illuminated target:
- - einerseits die gewollte Reflexion durch den (die) das Ziel markierenden Reflektor(en)- on the one hand the desired reflection by the target (s) marking reflector (s)
- - andererseits die ungewollten Reflexionen an der restlichen - nicht markierten - Oberfläche des Zieles.- on the other hand, the unwanted reflections on the rest - not marked - surface of the target.
Will man nun mit einem Sensor - z.B. einem optoelektronischen Sensor - die exakte Position der Zielmarkierungen, nämlich der Reflektoren, vermessen, so stört die ungewollte Reflexionskomponente.If you now want to measure the exact position of the target markings, namely the reflectors, with a sensor - for example an optoelectronic sensor - then the unwanted reflection component interferes.
Es ist das Ziel der Erfindung, diese ungewollten Reflexionen mit einfa chen Mitteln für die Messung weitgehend unwirksam zu machen.It is the object of the invention to simplify these unwanted reflections Chen means for measuring largely ineffective.
Diese Aufgabe wird durch die im kennzeichnenden Teil des Hauptanspruchs dargelegte Maßnahme gelöst.This task is accomplished by the in the characterizing part of the main claim described measure solved.
Die Erfindung wird anhand mehrerer Ausführungsbeispiele näher erläutert und beschrieben. Es zeigenThe invention is explained in more detail using several exemplary embodiments and described. Show it
Fig. 1 eine beispielshafte Geometrie für eine solche Messung, Fig. 1 shows an exemplary geometry for such a measurement,
Fig. 2 einen Reflektor mit λ/4-Plättchen. Fig. 2 shows a reflector with λ / 4 plates.
Ziel der Meßanordnung nach Fig. 1 ist, es die exakte Position von Retroreflektoren R auf dem Ziel Z, beispielsweise einem anzufliegenden Objekt, zu vermessen. Der Sensor S besteht aus einer Optik O mit einer CCD-Matrix- oder einem CCD-Zeilensensor, einer positionsempfindlichen Photodiode, einer Quadranten-Photodiode einer äquivalenten positionsemp findlichen Detektoranordnung D, auf welche die Reflektoren R abgebildet werden. Aus der Position des Bildes auf dem Detektor D kann über ein fache geometrische Beziehungen auch die Position des Reflektors R und damit des Zieles Z, bei mehreren Reflektoren auch Position und Orien tierung des Zieles Z, bestimmt werden.The aim of the measuring arrangement according to Fig. 1 is to measure it, the exact position of retroreflectors R on the target Z, for example a flying object to. The sensor S consists of an optical system O with a CCD matrix or a CCD line sensor, a position-sensitive photodiode, a quadrant photodiode of an equivalent position-sensitive detector arrangement D , onto which the reflectors R are imaged. From the position of the image on the detector D , the position of the reflector R and thus the target Z can be determined via a simple geometric relationship, and with several reflectors also the position and orientation of the target Z can be determined.
Um unerwünschte Reflexionen S′ vom Ziel Z von den erwünschten Reflexio nen S von den Reflektoren Z unterscheidbar zu machen, verändert man gemäß der Erfindung für die erwünschten Reflexionskomponenten S gezielt die Polarisationsrichtung.In order to distinguish undesired reflections S 'from the target Z from the desired reflections S from the reflectors Z , one changes according to the invention for the desired reflection components S specifically the direction of polarization.
Dies wird erfindungsgemäß nach Fig. 2 durch Vorschalten eines λ/4- Plättchens P vor dem Reflektor R, der im allgemeinen ein als Tripelspie gel ausgebildeter Retroreflektor ist, erreicht. Dieser Reflektor reflek tiert den einfallenden Beleuchtungs-Strahl S B parallel als Strahl S R zurück.This is according to the invention according to FIG. 2 achieved by connecting a λ / 4 plate P in front of the reflector R which is generally a gel formed as Tripelspie retroreflector. This reflector reflects the incident illuminating beam S B back in parallel as beam S R.
Bekanntlich wird der elektrische Feldvektor einer Strahlung bei Re flexion um 180° gedreht. Dies geschieht sowohl an der Zieloberfläche Z als auch durch den Reflektor, und zwar insgesamt dreimal bei einem Corner-Cube-Retroreflektor, da dort drei aufeinanderfolgende Reflexionen stattfinden.As is known, the electric field vector of a radiation is rotated by 180 ° during reflection. This happens both at the target surface Z and through the reflector, in particular three times in a corner cube retroreflector, since three successive reflections take place there.
Codiert man nun den Reflektor R - oder die Stelle der erwünschten Reflexion - mit einem λ/4-Plättchen P, so wandelt dieses die Polari sation des hindurchtretenden Lichtes. Beispielsweise wird linear polari siertes Licht in solches zirkulares Polarisation gewandelt. Nach einer oder drei oder einer ungeraden Anzahl von Reflexionen wird die Drehrich tung der Polarisation in ihr Gegenteil verkehrt. Tritt nun diese reflek tierte Strahlung abermals durch das λ/4-Plättchen - vgl. Fig. 2 - so ist die Polarisationsrichtung orthogonal zu der eintretenden Polarisation.If you now code the reflector R - or the location of the desired reflection - with a λ / 4 plate P , this converts the polarization of the light passing through. For example, linearly polarized light is converted into such circular polarization. After one or three or an odd number of reflections, the direction of rotation of the polarization is reversed to its opposite. If this reflected radiation now passes through the λ / 4 plate again - cf. Fig. 2 - so the direction of polarization is orthogonal to the incoming polarization.
Das Verfahren arbeitet analog für zirkulare Polarisation des eintreten den Lichtstrahls.The process works analogously for circular polarization of the entering the light beam.
Es ist nun durch Einfügen eines polarisationsselektiven Elementes, nämlich eines Polarisiationsfilter F oder eines polarisierenden Strahl teiler oder dgl. in den Empfangsstrahlengang des Sensors möglich, nur die gewünschte Reflexion auszuwerten und damit die unerwünschte Re flexionskomponente von der Messung auszuschließen.It is now possible by inserting a polarization-selective element, namely a polarization filter F or a polarizing beam splitter or the like. In the receiving beam path of the sensor to evaluate only the desired reflection and thus to exclude the undesired reflection component from the measurement.
Das erfindungsgemäße Verfahren ermöglicht nun jene unerwünschten Re flexionsanteile S′ zu separieren. Damit können jene nicht zur Positions messung beitragen und das Meßergebnis verfälschen.The method according to the invention now enables those undesired re flexion components S 'to be separated. This means that they cannot contribute to the position measurement and falsify the measurement result.
Die Erfindung ermöglicht erst die präzise Positionsmessung von mit Reflektoren markierten Gegenständen, da sie fehlerhafte Messungen aufgrund unerwünschter anderer Reflexionen verhindert.The invention enables the precise position measurement of with Reflectors marked objects as they made incorrect measurements prevented due to unwanted other reflections.
Claims (2)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873719235 DE3719235A1 (en) | 1987-06-09 | 1987-06-09 | Method and device for suppressing the influence of accidental reflections on a target which is marked with reflectors |
SE8801980A SE467024B (en) | 1987-06-09 | 1988-05-27 | DEVICE FOR CERTAIN POSITION DETERMINATION |
FR8807650A FR2616552A1 (en) | 1987-06-09 | 1988-06-08 | METHOD AND DEVICE FOR SUPPRESSING THE INFLUENCE OF INTERFERRED REFLECTIONS ON AN OBJECT LOCATED BY REFLECTORS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873719235 DE3719235A1 (en) | 1987-06-09 | 1987-06-09 | Method and device for suppressing the influence of accidental reflections on a target which is marked with reflectors |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3719235A1 true DE3719235A1 (en) | 1988-12-22 |
Family
ID=6329342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19873719235 Ceased DE3719235A1 (en) | 1987-06-09 | 1987-06-09 | Method and device for suppressing the influence of accidental reflections on a target which is marked with reflectors |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE3719235A1 (en) |
FR (1) | FR2616552A1 (en) |
SE (1) | SE467024B (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991004499A1 (en) * | 1989-09-15 | 1991-04-04 | Michiel Kassies | A method of, and apparatus for, detecting an object |
DE9410659U1 (en) * | 1994-07-01 | 1994-10-06 | Max Planck Gesellschaft | Receiving device for electromagnetic signals with an extended measuring range |
EP0643283A1 (en) * | 1993-09-09 | 1995-03-15 | Kabushiki Kaisha Topcon | Object reflector detection system |
EP0689032A2 (en) * | 1994-06-21 | 1995-12-27 | Kabushiki Kaisha Topcon | Surveying system |
EP0689033A1 (en) * | 1994-06-21 | 1995-12-27 | Kabushiki Kaisha Topcon | Surveying apparatus |
DE19910079C1 (en) * | 1999-03-08 | 2000-08-31 | Christian Gaertner | Device for viewing surgical and dental operations uses filter to allow through polarized light |
DE3912406B4 (en) * | 1989-04-15 | 2004-05-13 | Prüftechnik Dieter Busch AG | Method and device for scanning several optical measuring reflectors |
DE102016216568B4 (en) | 2016-09-01 | 2019-06-27 | Schott Ag | Method and device for imaging the inner contour of a pipe |
RU2742139C1 (en) * | 2020-03-25 | 2021-02-02 | Акционерное общество "Научно-исследовательский институт "Полюс" им. М.Ф. Стельмаха" | Method for detecting optical and optoelectronic devices |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1196255B (en) * | 1962-01-20 | 1965-07-08 | Telefunken Patent | Radar reflector for circular, elliptical or linearly polarized electromagnetic waves in any plane |
US3723003A (en) * | 1968-11-25 | 1973-03-27 | Hauser Raimund | Rangefinder |
DE2413319A1 (en) * | 1973-03-21 | 1974-09-26 | Ibm | OPTICAL MEASURING METHOD AND DEVICE FOR CARRYING OUT THE METHOD |
DE2500120A1 (en) * | 1974-01-07 | 1975-08-14 | Lignes Telegraph Telephon | OBSTACLE DETECTION SYSTEM |
DE2502662A1 (en) * | 1974-01-24 | 1975-08-14 | Ferranti Ltd | LASER DISTANCE METER |
DE2909090A1 (en) * | 1978-03-08 | 1979-09-20 | Minolta Camera Kk | DISTANCE MEASURING SYSTEM |
GB2167262A (en) * | 1984-10-25 | 1986-05-21 | Canon Kk | Distance measurement |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5852190B2 (en) * | 1981-05-28 | 1983-11-21 | 名古屋電機工業株式会社 | Specific object detection device |
FR2592721B1 (en) * | 1986-01-08 | 1988-11-04 | Signaux Entr Electriques | LASER ECARTOMETRY TELEMETRY METHOD AND DEVICE ON COOPERATIVE TARGETS |
-
1987
- 1987-06-09 DE DE19873719235 patent/DE3719235A1/en not_active Ceased
-
1988
- 1988-05-27 SE SE8801980A patent/SE467024B/en not_active IP Right Cessation
- 1988-06-08 FR FR8807650A patent/FR2616552A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1196255B (en) * | 1962-01-20 | 1965-07-08 | Telefunken Patent | Radar reflector for circular, elliptical or linearly polarized electromagnetic waves in any plane |
US3723003A (en) * | 1968-11-25 | 1973-03-27 | Hauser Raimund | Rangefinder |
DE2413319A1 (en) * | 1973-03-21 | 1974-09-26 | Ibm | OPTICAL MEASURING METHOD AND DEVICE FOR CARRYING OUT THE METHOD |
DE2500120A1 (en) * | 1974-01-07 | 1975-08-14 | Lignes Telegraph Telephon | OBSTACLE DETECTION SYSTEM |
DE2502662A1 (en) * | 1974-01-24 | 1975-08-14 | Ferranti Ltd | LASER DISTANCE METER |
DE2909090A1 (en) * | 1978-03-08 | 1979-09-20 | Minolta Camera Kk | DISTANCE MEASURING SYSTEM |
GB2167262A (en) * | 1984-10-25 | 1986-05-21 | Canon Kk | Distance measurement |
Non-Patent Citations (1)
Title |
---|
HOMBURG, Dietrich: Mit polarisiertem Licht? Reflexionslichtschranken mit hoher Störsicher- heit. In: Elektronik Journal, 1986, H.4, S.23/24 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3912406B4 (en) * | 1989-04-15 | 2004-05-13 | Prüftechnik Dieter Busch AG | Method and device for scanning several optical measuring reflectors |
WO1991004499A1 (en) * | 1989-09-15 | 1991-04-04 | Michiel Kassies | A method of, and apparatus for, detecting an object |
EP0643283A1 (en) * | 1993-09-09 | 1995-03-15 | Kabushiki Kaisha Topcon | Object reflector detection system |
EP0689032A2 (en) * | 1994-06-21 | 1995-12-27 | Kabushiki Kaisha Topcon | Surveying system |
EP0689033A1 (en) * | 1994-06-21 | 1995-12-27 | Kabushiki Kaisha Topcon | Surveying apparatus |
EP0689032A3 (en) * | 1994-06-21 | 1996-03-06 | Topcon Corp | Surveying system |
DE9410659U1 (en) * | 1994-07-01 | 1994-10-06 | Max Planck Gesellschaft | Receiving device for electromagnetic signals with an extended measuring range |
DE19910079C1 (en) * | 1999-03-08 | 2000-08-31 | Christian Gaertner | Device for viewing surgical and dental operations uses filter to allow through polarized light |
DE102016216568B4 (en) | 2016-09-01 | 2019-06-27 | Schott Ag | Method and device for imaging the inner contour of a pipe |
RU2742139C1 (en) * | 2020-03-25 | 2021-02-02 | Акционерное общество "Научно-исследовательский институт "Полюс" им. М.Ф. Стельмаха" | Method for detecting optical and optoelectronic devices |
Also Published As
Publication number | Publication date |
---|---|
SE8801980D0 (en) | 1988-05-27 |
SE467024B (en) | 1992-05-11 |
FR2616552A1 (en) | 1988-12-16 |
SE8801980L (en) | 1988-12-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |