modulated beam การใช้

• Using a fully modulated beam of sunlight as a test signal, one experimental receiver design, employing only a deposit of lampblack, produced a tone that Bell described as " painfully loud " to an ear pressed close to the device.
• The first demonstration of the live transmission of images was by Georges Rignoux and A . Fournier in Paris in 1909 . A matrix of 64 selenium cells, individually wired to a mechanical Kerr cell modulated the light and a series of variously angled mirrors attached to the edge of a rotating disc scanned the modulated beam onto the display screen.
• The first demonstration of the " instantaneous " transmission of images was by Georges Rignoux and A . Fournier in Paris in 1909 . A matrix of 64 selenium cells, individually wired to a mechanical Kerr cell modulated the light and a series of variously angled mirrors attached to the edge of a rotating disc scanned the modulated beam onto the display screen.
• The main difference is that in HT a narrow intensity modulated pencil beam is delivered from a rotating gantry while the patient is simultaneously moved through the bore, compared to the much wider intensity modulated beam and static patient in conventional IMRT . HT units are therefore better able to target treatment sites throughout the body without a pause for the patient to be moved and set-up differently.