Abstract
The design of a single integrated lock-in pixel with a logarithmic response for a modulated light camera is described. The sensor has been designed to detect low light levels and can detect modulated light with frequency well above 2 MHz. An n-well photodiode, amplifier, mixer and ISO Hz low-pass filter have been implemented to allow continuous processing of the incident light. The performance of the sensor is demonstrated using an optoacoustic imaging system and tissue phantoms. A 1MHz ultrasound transducer is used to modulate light scattered though a tissue phantom. An absorbing sphere is scanned through the medium and the improvement in imaging performance provided by ultrasound modulation is demonstrated.
Original language | English |
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Article number | 5486-42 |
Pages (from-to) | 274-279 |
Number of pages | 6 |
Journal | Progress in Biomedical Optics and Imaging - Proceedings of SPIE |
Volume | 5 |
Issue number | 30 |
DOIs | |
Publication status | Published - 1 Dec 2004 |
Externally published | Yes |
Event | ALT'03 International Conference on Advanced Laser Technologies: Biomedical Optics - Silsoe, United Kingdom Duration: 19 Sept 2003 → 23 Sept 2003 |
ASJC Scopus subject areas
- General Engineering