DE102012203596A1 - Light time sensor for light time camera, has modulation and accumulation gates that are respectively arranged in light and light insensitive regions, and absorbent layer that is formed partially outside of light sensitive regions - Google Patents
Light time sensor for light time camera, has modulation and accumulation gates that are respectively arranged in light and light insensitive regions, and absorbent layer that is formed partially outside of light sensitive regions Download PDFInfo
- Publication number
- DE102012203596A1 DE102012203596A1 DE201210203596 DE102012203596A DE102012203596A1 DE 102012203596 A1 DE102012203596 A1 DE 102012203596A1 DE 201210203596 DE201210203596 DE 201210203596 DE 102012203596 A DE102012203596 A DE 102012203596A DE 102012203596 A1 DE102012203596 A1 DE 102012203596A1
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- Germany
- Prior art keywords
- light
- transit time
- time sensor
- modulation
- absorption layer
- 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.)
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Classifications
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- 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
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4816—Constructional features, e.g. arrangements of optical elements of receivers alone
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
- G01S17/894—3D imaging with simultaneous measurement of time-of-flight at a 2D array of receiver pixels, e.g. time-of-flight cameras or flash lidar
Abstract
Description
Die Erfindung betrifft einen Lichtlaufzeitsensor für eine Lichtlaufzeitkamera nach Gattung des unabhängigen Anspruchs. The invention relates to a light transit time sensor for a light transit time camera according to the preamble of the independent claim.
Mit Lichtlaufzeitkamera sollen nicht nur Systeme umfasst sein, die Entfernungen direkt aus der Lichtlaufzeit ermitteln, sondern insbesondere auch alle Lichtlaufzeit bzw. 3D-TOF-Kamerasysteme, die eine Laufzeitinformation aus der Phasenverschiebung einer emittierten und empfangenen Strahlung gewinnen. Als Lichtlaufzeit bzw. 3D-TOF-Kameras sind insbesondere PMD-Kameras mit Photomischdetektoren (PMD) geeignet, wie sie u.a. in den Anmeldungen
Aufgabe der Erfindung ist es, die Zuverlässigkeit und Genauigkeit der Distanzmessungen einer Lichtlaufzeitkamera zu verbessern. The object of the invention is to improve the reliability and accuracy of the distance measurements of a light runtime camera.
Die Aufgabe wird in vorteilhafter Weise durch den erfindungsgemäßen Lichtlaufzeitsensor gelöst. The object is achieved in an advantageous manner by the light transit time sensor according to the invention.
Vorteilhaft ist eine Lichtlaufzeitsensor vorgesehen, mit mindestens einem Lichtlaufzeitpixel, mit Modulationsgates in einem lichtempfindlichen Bereich und mit Akkumulationsgates in einem lichtunempfindlichen Bereich, wobei der Lichtlaufzeitsensor außerhalb der lichtempfindlichen Bereiche, zumindest teilweise eine Absorptionsschicht aufweist. Advantageously, a light transit time sensor is provided, with at least one light transit time pixel, with modulation gates in a light-sensitive area and with accumulation gates in a light-insensitive area, wherein the light transit time sensor outside the photosensitive areas, at least partially has an absorption layer.
Vorteilhaft sind zumindest die Akkumulationsgates mit einer Absorptionsschicht abgedeckt. In einer weiteren vorteilhaften Ausgestaltung ist eine Deckschicht des Lichtlaufzeitsensors außerhalb der lichtempfindlichen Bereiche als Absorptionsschicht ausgebildet oder durch eine Absorptionsschicht ersetzt ist. Advantageously, at least the accumulation gates are covered with an absorption layer. In a further advantageous embodiment, a cover layer of the light transit time sensor outside of the photosensitive regions is formed as an absorption layer or replaced by an absorption layer.
Bevorzugt weist die Absorptionsschicht eine geringe Reflektivität und eine hohe Lichtabsorption auf. Preferably, the absorption layer has a low reflectivity and a high light absorption.
Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen näher erläutert. The invention will be explained in more detail by means of embodiments with reference to the drawings.
Es zeigen schematisch: They show schematically:
Bei der nachfolgenden Beschreibung der bevorzugten Ausführungsformen bezeichnen gleiche Bezugszeichen gleiche oder vergleichbare Komponenten. In the following description of the preferred embodiments, like reference characters designate like or similar components.
Das Lichtlaufzeit-Kamerasystem
Das Messprinzip dieser Anordnung basiert im Wesentlichen darauf, dass ausgehend von der Phasenverschiebung des emittierten und empfangenen Lichts die Laufzeit des emittierten und reflektierten Lichts ermittelt werden kann. Zu diesem Zwecke werden die Lichtquelle
In
Typischerweise wird der Sensor
Die Deckschicht
Die Absorptionsschicht
Ferner könnte die Absorptionsschicht absorbierende Partikel aufweisen, beispielsweise Pigmente, die die primäre/sekundäre Lichtenergie absorbieren. Further, the absorbent layer could include absorbent particles, for example, pigments that absorb the primary / secondary light energy.
Die Herstellung der Schicht ist selbstverständlich nicht auf ein fotolithografisches Verfahren beschränkt. Auch ist es denkbar, die Absorptionsschicht
Im dargestellten Beispiel wird das primäre Licht p in der über die Akkumulationsgates Ga, Gb liegenden Absorptionsschicht
Die Absorptionsschicht
Selbstverständlich sind auch Kombinationen der genannten Ausführungsbeispiele möglich. Auch ist es denkbar, die Deckschicht
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 1010
- Sendeeinheit transmission unit
- 1212
- Beleuchtungslichtquelle Illumination light source
- 1515
- Strahlformungsoptik Beam shaping optics
- 2020
- Empfangseinheit, TOF-Kamera Receiving unit, TOF camera
- 2222
- Lichtlaufzeitsensor Transit Time Sensor
- 2323
- Lichtlaufzeitpixel, Pixel Light transit time pixels, pixels
- 2525
- Empfangsoptik receiving optics
- 3030
- Modulator modulator
- 4040
- Objekt object
- 5050
- Optik optics
- 210210
- Isolierschicht insulating
- 220220
- Lichtabschirmung light shield
- 230230
- Deckschicht topcoat
- 240240
- Absorptionsschicht, Lichtabsorptionsschicht Absorption layer, light absorption layer
- 300300
- lichtempfindlicher Bereich photosensitive area
- 400400
- Deckglas cover glass
- pp
- primäres Licht primary light
- ss
- sekundäres Licht secondary light
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- EP 1777747 [0002] EP 1777747 [0002]
- US 6587186 [0002] US 6587186 [0002]
- DE 19704496 [0002, 0017] DE 19704496 [0002, 0017]
- DE 19704496 C2 [0020] DE 19704496 C2 [0020]
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012203596.6A DE102012203596B4 (en) | 2012-03-07 | 2012-03-07 | Time of flight sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012203596.6A DE102012203596B4 (en) | 2012-03-07 | 2012-03-07 | Time of flight sensor |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102012203596A1 true DE102012203596A1 (en) | 2013-09-12 |
DE102012203596B4 DE102012203596B4 (en) | 2023-11-23 |
Family
ID=49029562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102012203596.6A Active DE102012203596B4 (en) | 2012-03-07 | 2012-03-07 | Time of flight sensor |
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DE (1) | DE102012203596B4 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017213549B3 (en) | 2017-08-04 | 2018-09-27 | Ifm Electronic Gmbh | Light section sensor and method for operating a light section sensor |
CN113675226A (en) * | 2020-05-15 | 2021-11-19 | 豪威科技股份有限公司 | Active pixel device assembly with stray light reduction and method of making coating therefor |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19704496A1 (en) | 1996-09-05 | 1998-03-12 | Rudolf Prof Dr Ing Schwarte | Method and device for determining the phase and / or amplitude information of an electromagnetic wave |
US6587186B2 (en) | 2000-06-06 | 2003-07-01 | Canesta, Inc. | CMOS-compatible three-dimensional image sensing using reduced peak energy |
EP1009984B1 (en) * | 1996-09-05 | 2003-11-19 | SCHWARTE, Rudolf | Method and device for determining the phase- and/or amplitude data of an electromagnetic wave |
EP1777747A1 (en) | 2005-10-19 | 2007-04-25 | CSEM Centre Suisse d'Electronique et de Microtechnique SA | Device and method for the demodulation of modulated electromagnetic wave fields |
US20090244514A1 (en) * | 2008-03-26 | 2009-10-01 | Samsung Electronics Co., Ltd. | Distance measuring sensors including vertical photogate and three-dimensional color image sensors including distance measuring sensors |
-
2012
- 2012-03-07 DE DE102012203596.6A patent/DE102012203596B4/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19704496A1 (en) | 1996-09-05 | 1998-03-12 | Rudolf Prof Dr Ing Schwarte | Method and device for determining the phase and / or amplitude information of an electromagnetic wave |
DE19704496C2 (en) | 1996-09-05 | 2001-02-15 | Rudolf Schwarte | Method and device for determining the phase and / or amplitude information of an electromagnetic wave |
EP1009984B1 (en) * | 1996-09-05 | 2003-11-19 | SCHWARTE, Rudolf | Method and device for determining the phase- and/or amplitude data of an electromagnetic wave |
US6587186B2 (en) | 2000-06-06 | 2003-07-01 | Canesta, Inc. | CMOS-compatible three-dimensional image sensing using reduced peak energy |
EP1777747A1 (en) | 2005-10-19 | 2007-04-25 | CSEM Centre Suisse d'Electronique et de Microtechnique SA | Device and method for the demodulation of modulated electromagnetic wave fields |
US20090244514A1 (en) * | 2008-03-26 | 2009-10-01 | Samsung Electronics Co., Ltd. | Distance measuring sensors including vertical photogate and three-dimensional color image sensors including distance measuring sensors |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017213549B3 (en) | 2017-08-04 | 2018-09-27 | Ifm Electronic Gmbh | Light section sensor and method for operating a light section sensor |
WO2019025096A1 (en) | 2017-08-04 | 2019-02-07 | Ifm Electronic Gmbh | Light section sensor and method for operating a light section sensor |
CN113675226A (en) * | 2020-05-15 | 2021-11-19 | 豪威科技股份有限公司 | Active pixel device assembly with stray light reduction and method of making coating therefor |
Also Published As
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DE102012203596B4 (en) | 2023-11-23 |
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