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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yasutomi, K. Usui, T. Sang-Man Han Takasawa, T. Kagawa, K. Kawahito, S. |
| Copyright Year | 2014 |
| Description | Author affiliation: Shizuoka Univ., Hamamatsu, Japan (Yasutomi, K.; Usui, T.; Sang-Man Han; Takasawa, T.; Kagawa, K.; Kawahito, S.) |
| 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. |
| Starting Page | 132 |
| Ending Page | 133 |
| File Size | 1309649 |
| Page Count | 2 |
| File Format | |
| ISBN | 9781479909186 |
| ISSN | 01936530 |
| e-ISBN | 9781479909209 |
| DOI | 10.1109/ISSCC.2014.6757369 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-02-09 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Calibration Image resolution Modulation Clocks Photoconductivity Detectors Image sensors |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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