Abstract
In this work, we have successfully implemented supercontinuum based illumination through single fiber coupling. The integration of a single fiber illumination with a miniature CMOS sensor forms a very slim and powerful camera module for endoscopic imaging. A set of tests and in vivo animal experiments are conducted accordingly to characterize the corresponding illuminance, spectral profile, intensity distribution, and image quality. The key illumination parameters of the supercontinuum, including color rendering index (CRI: 72%~97%) and correlated color temperature (CCT: 3,100K~5,200K), are modified with external filters and compared with those from a LED light source (CRI~76% & CCT~6,500K). The very high spatial coherence of the supercontinuum allows high luminosity conduction through a single multimode fiber (core size~400μm), whose distal end tip is attached with a diffussion tip to broaden the solid angle of illumination (from less than 10° to more than 80°).
Highlights
CMOS sensors has greatly advanced endoscopy and minimally invasive surgery with improved versatility
Light-emitting Diode (LED) based illumination is often carried out with conventional fiber bundle coupling [3] or directly with miniaturized LED chips packaged in the distal end of a camera module
The emergence of ultra-compact CMOS image sensors, with die size as small as 0.7 x 0.7 mm2 [4], would call for further innovation in endoscopy illumination so that the footprint of the camera module can fully utilize the ultra-compactness of the CMOS sensors [5,6,7,8,9]
Summary
CMOS sensors has greatly advanced endoscopy and minimally invasive surgery with improved versatility. To take better advantages of imaging CMOS sensors, the corresponding illumination is critical. LED based illumination is often carried out with conventional fiber bundle coupling [3] or directly with miniaturized LED chips packaged in the distal end of a camera module. The emergence of ultra-compact CMOS image sensors, with die size as small as 0.7 x 0.7 mm2 [4], would call for further innovation in endoscopy illumination so that the footprint of the camera module can fully utilize the ultra-compactness of the CMOS sensors [5,6,7,8,9]. Fiber bundle coupling or packaged LED chips in the distal end, usually of a few millimeters square in size, would be too large for such a purpose. Engineering a very compact light source with high brightness while free of thermal loading is imperative for miniaturized endoscopy
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
