White Light Endoscopy for Minimal Invasive Surgery
type: CreativeWork
description: Endoscopy has become a very advantageous medical procedure particularly for investigative and operational surgery for cancer. The preferred method over open surgery, it offers the advantages of less invasion with shorter operation time, less trauma to the patient and quicker recovery time. The method proves beneficial to the patient as well as providing a cost saving to the NHS. This study made possible through a collaboration between The University of South Wales and the company partner, Cymtec Ltd. investigates the possibility of producing a solid-state LED or laser pumped phosphor white light system. The overall aim was to replace current xenon lamps, which have many unwanted characteristics with lower cost, higher efficiency and more environmentally friendly solid state devices to improve the benefits of endoscopic minimal invasive surgery even further. Instruments used in the procedures are small for use in restrictive spaces, the investigation therefore is focused on not just producing high power white light, but to provide high power white light that can be coupled into a small diameter liquid light guide (LLG), which can then be connected to endoscopic instruments. The etendue of the light therefore becomes a critical factor of the investigation. A patented light guide multiplexer technology designed by the company partner, Cymtec Ltd. which multiplexes light from red, green and blue high-power LEDs with relatively narrowband wavelengths is firstly reviewed. Following which development of the technology is achieved through careful consideration of optical bonding to increase efficiency whilst providing structural strength. From this investigation possible improvements to the system are identified and reviewed with a view to increasing the overall luminous output. As an alternative to multiplexing of blue, green and red LEDs to, phosphor technology is also investigated. YAG:Ce powdered phosphor coated on float glass in varying thicknesses is evaluated for sui…
abstract: Endoscopy has become a very advantageous medical procedure particularly for investigative and operational surgery for cancer. The preferred method over open surgery, it offers the advantages of less invasion with shorter operation time, less trauma to the patient and quicker recovery time. The method proves beneficial to the patient as well as providing a cost saving to the NHS. This study made possible through a collaboration between The University of South Wales and the company partner, Cymtec Ltd. investigates the possibility of producing a solid-state LED or laser pumped phosphor white light system. The overall aim was to replace current xenon lamps, which have many unwanted characteristics with lower cost, higher efficiency and more environmentally friendly solid state devices to improve the benefits of endoscopic minimal invasive surgery even further. Instruments used in the procedures are small for use in restrictive spaces, the investigation therefore is focused on not just producing high power white light, but to provide high power white light that can be coupled into a small diameter liquid light guide (LLG), which can then be connected to endoscopic instruments. The etendue of the light therefore becomes a critical factor of the investigation. A patented light guide multiplexer technology designed by the company partner, Cymtec Ltd. which multiplexes light from red, green and blue high-power LEDs with relatively narrowband wavelengths is firstly reviewed. Following which development of the technology is achieved through careful consideration of optical bonding to increase efficiency whilst providing structural strength. From this investigation possible improvements to the system are identified and reviewed with a view to increasing the overall luminous output. As an alternative to multiplexing of blue, green and red LEDs to, phosphor technology is also investigated. YAG:Ce powdered phosphor coated on float glass in varying thicknesses is evaluated for sui…
author: Price, Christopher
language: eng
date published: 2022-8
date modified: 2026-07-24T04:39:51Z
provider: University of South Wales
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of South Wales