| 54 |
Title |
TI |
[DE] Vorrichtung und Verfahren zur ortsauflösende Photodetektion und Demodulation von modulierten elektromagnetischen Wellen
[EN] Device and method for spatially resolved photodetection and demodulation of modulated electromagnetic waves
[FR] Dispositif et procédé de détection avec résolution spatiale et démodulation d'ondes électromagnétiques modulées |
| 71/73 |
Applicant/owner |
PA |
SUISSE ELECTRONIQUE MICROTECH, CH
|
| 72 |
Inventor |
IN |
LANGE ROBERT, CH
;
SEITZ PETER, CH
|
| 22/96 |
Application date |
AD |
Apr 28, 2000 |
| 21 |
Application number |
AN |
00109271 |
|
Country of application |
AC |
EP |
|
Publication date |
PUB |
Nov 7, 2001 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
|
| 51 |
IPC main class |
ICM |
G01S 17/89
|
| 51 |
IPC secondary class |
ICS |
G01S 17/10
G01S 7/486
H04N 5/225
|
|
IPC additional class |
ICA |
|
|
IPC index class |
ICI |
|
|
Cooperative patent classification |
CPC |
G01S 17/10
G01S 17/894
G01S 7/4816
G01S 7/4863
|
|
MCD main class |
MCM |
G01J 1/02
(2006.01)
G01S 17/10
(2020.01)
|
|
MCD secondary class |
MCS |
G01J 1/42
(2006.01)
G01S 17/894
(2020.01)
G01S 7/4863
(2020.01)
H01L 27/148
(2006.01)
H01L 27/14
(2006.01)
H01L 31/0232
(2006.01)
|
|
MCD additional class |
MCA |
|
| 57 |
Abstract |
AB |
[EN] The device and method for spatially resolved photodetection and demodulation of temporally modulated electromagnetic waves make possible to measure phase, amplitude and offset of a temporally modulated, spatially coded radiation field. A micro-optical element (41) spatially averages a portion (30) of the scene and equally distributes the averaged intensity on two photo sites (51.1, 51.2) close to each other. Adjacent to each of these photo sites (51.1) are two storage areas (54.1, 54.2) into which charge from the photo site can be moved quickly (with a speed of several MHz to several tens or even hundreds of MHz) and accumulated essentially free of noise. This is possible by employing the charge-coupled device (CCD) principle. The device can be operated in two modes for two types of modulated radiation fields: (1) sinusoidal radiation signals are demodulated by operating the photo sites (51.1, 51.2) and their storage areas (54.1-54.4) in quadrature, i.e., by applying the clocking signals to the second photo site (51.2) and its storage areas (54.3, 54.4) with a delay of a quarter of the repetition period compared to the first photo site (51.1) and its storage areas (54.1, 54.2); (2) pulsed radiation signals are measured by switching the first photo site's storage part from the first (54.1) to the second area (54.2) during the arrival of the radiation pulse, whereby the second photo site (51.2) and its storage areas (54.3, 54.4) are used for offset measurements without emitted and received radiation. The device combines a high optical fill factor, insensitivity to offset errors, high sensitivity even with little light, simultaneous data acquisition, small pixel size and maximum efficiency in use of available signal photons for sinusoidal as well as pulsed radiation signals. Preferential use is in a time-of-flight (TOF) range imaging system without moving parts, offering 2D or 3D range data. <IMAGE> |
| 56 |
Cited documents identified in the search |
CT |
DE000004440613C1
DE000019704496A1
DE000019821974A1
US000004796997A
US000004915498A
US000005850282A
WO001997026761A1
|
| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
SCHWARTE R ET AL: "NEUARTIGE 3D-VISIONSYSTEME AUF DER BASIS LAYOUT-OPTIMIERTER PMD- STRUKTUREN", TECHNISCHES MESSEN TM, R.OLDENBOURG VERLAG. MUNCHEN, DE, vol. 65, no. 7/08, 1 July 1998 (1998-07-01), pages 264 - 271, XP000847213, ISSN: 0171-8096 2
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
|
|
Citing documents |
|
Determine documents
|
|
Sequence listings |
|
|
|
Search file IPC |
ICP |
G01S 17/36
G01S 17/89
H04N 5/225
|
