Name
Title | ||
|---|---|---|
7.5 A 0.3mm-resolution Time-of-Flight CMOS range imager with column-gating clock-skew calibration |
Abstract | ||
|---|---|---|
Recently, 3D scanning systems have attracted rapidly rising attention in combination with 3D printers. One of the common technologies in contactless 3D scanners is the light-section method, which has advantages in term of accuracy. The method, however, requires a long base line between a camera and light source to achieve high resolution and a mechanical scanning system. A high range resolution Time-of-Flight (ToF) imager provides new possibilities of implementing a miniature head, which allows flexible scanning of an object with a complicated structure. The range resolution of reported CMOS ToF imagers [1-3] is limited to a few centimeters. For higher resolution, higher modulation frequency is required. However, the modulation frequency used for CMOS ToF imagers is limited to several tens of MHz. This paper presents a ToF imager with 0.3mm range resolution, which corresponds to 2ps time resolution. To achieve this high resolution, the imager uses a ToF measurement technique based on an impulse photocurrent response [4] and draining-only modulation (DOM) pixels [5]. To realize a range imager with 2D pixel array, column-wise gating-clock skew calibration is implemented to demonstrate simultaneous sub-mm ToF measurements for the whole pixel array. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/ISSCC.2014.6757369 | Solid-State Circuits Conference Digest of Technical Papers |
Keywords | DocType | ISSN |
cmos image sensors,calibration,cameras,optical scanners,2d pixel array,3d printers,3d scanning systems,cmos tof imagers,dom pixels,tof measurement technique,camera,column-gating clock-skew calibration,contactless 3d scanners,draining-only modulation pixel,flexible object scanning,high range resolution time-of-flight imager,impulse photocurrent response,light source,light-section method,mechanical scanning system,miniature head,modulation frequency,pixel array,simultaneous sub-mm tof measurements,time 2 ps,time-of-flight cmos range imager | Conference | 0193-6530 |
Citations | PageRank | References |
4 | 0.79 | 2 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Keita Yasutomi | 1 | 122 | 21.09 |
| takahiro usui | 2 | 4 | 0.79 |
| sangman han | 3 | 4 | 1.13 |
| Taishi Takasawa | 4 | 34 | 5.25 |
| Keiichiro Kagawa | 5 | 87 | 14.82 |
| Shoji Kawahito | 6 | 270 | 67.13 |