Dual view capsule endoscopic lens design

Sheu, Ming Jen; Chiang, Che Wen; Sun, Wen Shing; Wang, Jhi Joung; Pan, Jui Wen

doi:10.1364/oe.23.008565

Cited by 26 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recently, capsules integrating multiple cameras have been developed and can potentially acquire images looking forward and backwards, such as PillCam® Colon 2 and UGI capsules. Similar results may also be achieved through lens design [ 90 ]. In particular, microlens arrays or lenticular lens arrays, which have been demonstrated in laparoscopic surgery [ 91 ], could be used to provide a multi-view image using a single sensor to maintain a small device footprint.…”

Section: System Architecture Of a Robotic Capsule: Emerging Solutionssupporting

confidence: 75%

Frontiers of robotic endoscopic capsules: a review

et al. 2016

View full text Add to dashboard Cite

Digestive diseases are a major burden for society and healthcare systems, and with an aging population, the importance of their effective management will become critical. Healthcare systems worldwide already struggle to insure quality and affordability of healthcare delivery and this will be a significant challenge in the midterm future. Wireless capsule endoscopy (WCE), introduced in 2000 by Given Imaging Ltd., is an example of disruptive technology and represents an attractive alternative to traditional diagnostic techniques. WCE overcomes conventional endoscopy enabling inspection of the digestive system without discomfort or the need for sedation. Thus, it has the advantage of encouraging patients to undergo gastrointestinal (GI) tract examinations and of facilitating mass screening programmes. With the integration of further capabilities based on microrobotics, e.g. active locomotion and embedded therapeutic modules, WCE could become the key-technology for GI diagnosis and treatment. This review presents a research update on WCE and describes the state-of-the-art of current endoscopic devices with a focus on research-oriented robotic capsule endoscopes enabled by microsystem technologies. The article also presents a visionary perspective on WCE potential for screening, diagnostic and therapeutic endoscopic procedures.

show abstract

Section: System Architecture Of a Robotic Capsule: Emerging Solutionssupporting

confidence: 75%

Frontiers of robotic endoscopic capsules: a review

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The aperture stop of the CE lens must be large enough to receive the optical flux at the image sensor. The common f -number of a CE lens [9,16] is larger than f -3.5, that is, it receives lower optical flux than does a lens with f -2.8. Therefore, a CE lens with f -2.8 is large enough to receive the optical flux at the color sensor.…”

Section: Ray-tracing Simulation In the Cmce With The Color Multipleximentioning

confidence: 94%

Color multiplexing method to capture front and side images with a capsule endoscope

2015

View full text Add to dashboard Cite

This paper proposes a capsule endoscope (CE), based on color multiplexing, to simultaneously record front and side images. Only one lens associated with an X-cube prism is employed to catch the front and side view profiles in the CE. Three color filters and polarizers are placed on three sides of an X-cube prism. When objects locate at one of the X-cube's three sides, front and side view profiles of different colors will be caught through the proposed lens and recorded at the color image sensor. The proposed color multiplexing CE (CMCE) is designed with a field of view of up to 210 deg and a 180 lp/mm resolution under f-number 2.8 and overall length 13.323 mm. A ray-tracing simulation in the CMCE with the color multiplexing mechanism verifies that the CMCE not only records the front and side view profiles at the same time, but also has great image quality at a small size.

show abstract

“…[84] demonstrated that a compact dual-channel endoscopic probe can simultaneously observe the needs of forward and backward FoVs in the colon. Similar designs can also be used in endoscopic capsules [85]. Developing a new convex mirror and repositioning the camera viewpoint can improve the efficiency of the catadioptric camera in the RoboCup MSL robot [86].…”

Section: Catadioptric Panoramic Systemmentioning

confidence: 99%

Review on Panoramic Imaging and Its Applications in Scene Understanding

Gao¹,

Yang²,

Sheng³

et al. 2022

Preprint

View full text Add to dashboard Cite

With the rapid development of high-speed communication and artificial intelligence technologies, human perception of real-world scenes is no longer limited to the use of small Field of View (FoV) and low-dimensional scene detection devices. Panoramic imaging emerges as the next generation of innovative intelligent instruments for environmental perception and measurement. However, while satisfying the need for large-FoV photographic imaging, panoramic imaging instruments are expected to have high resolution, no blind area, miniaturization, and multi-dimensional intelligent perception, and can be combined with artificial intelligence methods towards the next generation of intelligent instruments, enabling deeper understanding and more holistic perception of 360 • real-world surrounding environments. Fortunately, recent advances in freeform surfaces, thinplate optics, and metasurfaces provide innovative approaches to address human perception of the environment, offering promising ideas beyond conventional optical imaging. In this review, we begin with introducing the basic principles of panoramic imaging systems, and then describe the architectures, features, and functions of various panoramic imaging systems. Afterwards, we discuss in detail the broad application prospects and great design potential of freeform surfaces, thin-plate optics, and metasurfaces in panoramic imaging. We then provide a detailed analysis on how these techniques can help enhance the performance of panoramic imaging systems. We further offer a detailed analysis of applications of panoramic imaging in scene understanding for autonomous driving and robotics, spanning panoramic semantic image segmentation, panoramic depth estimation, panoramic visual localization, and so on. Finally, we cast a perspective on future potential and research directions for panoramic imaging instruments.

show abstract

Dual view capsule endoscopic lens design

Cited by 26 publications

References 11 publications

Frontiers of robotic endoscopic capsules: a review

Frontiers of robotic endoscopic capsules: a review

Color multiplexing method to capture front and side images with a capsule endoscope

Review on Panoramic Imaging and Its Applications in Scene Understanding

Contact Info

Product

Resources

About