2006-10-20 19:33:25 · 6 answers · asked by mac 1 in Science & Mathematics ➔ Chemistry
hi,
optical fibers are long, flexible and they transmit light very well within their thickness. these are favourable properties for an endoscope.
p.s i believe the process is called an anoscopy.
2006-10-20 19:40:11 · answer #1 · answered by Anonymous · 0⤊ 2⤋
The incision made to the patients body can be significantly less and therefore less trauma to the patient and a decrease a recovery time, also optical fibers are long, flexible, transmit light well and are extremely precisional. Some special-purpose optical fiber is constructed with a non-cylindrical core and/or cladding layer, usually with an elliptical or rectangular cross-section. These include polarization-maintaining fiber and fiber designed to suppress whispering gallery mode propagation. The phrase is that they are "minimally invasive".
2006-10-21 04:25:17 · answer #2 · answered by Anonymous · 0⤊ 0⤋
This is provided from an external high-intensity source through one or more light-carrying bundles. Since these light bundles do not transmit a spatial image, the fibers within them need not be ‘coherent’ and are randomly arranged. Because light intensity is reduced at any optical interface, light bundles run uninterruptedly from the tip of the instrument through its connecting ‘umbilical’ cord directly to the point of focus of the lamp. These may be xenon arc (300W) or halogen-filled tungsten filament lamps (150W). Light is focused by a parabolic mirror onto the face of the bundle, and the transmitted intensity is controlled by filters and/or a mechanical diaphragm. The light sources made by different companies are not always interchangeable; adapters may be provided, but involve a further optical interface and some loss of light. Small sources are mobile and relatively cheap and provide sufficient illumination for simple observation and standard photography. Large light sources are necessary for optimal photography and television application when using fiber-scopes or video-endoscopes.
2006-10-21 02:59:24 · answer #3 · answered by veerabhadrasarma m 7 · 0⤊ 1⤋
They are flexible and have a high refractive index, meaning light is not lost when transmitting pictures from the camera in the endoscope to the screen.
2006-10-23 06:51:56 · answer #4 · answered by Chemical Engineer 2 · 0⤊ 0⤋
To transmit light into the patient, and video back out.
Small size and good flexibility, when compared with wire.
2006-10-21 02:42:21 · answer #5 · answered by dantheman_028 4 · 0⤊ 1⤋
easier than shoving a movie camera up your bum
2006-10-21 02:45:45 · answer #6 · answered by Anonymous · 0⤊ 1⤋