-----Original Message----- From: Mike Carrell [mailto:[EMAIL PROTECTED] Sent: Monday, January 08, 2007 5:02 PM To: vortex-l@eskimo.com Subject: Re: [Vo]: Optics question
There is a misunderstanding of the nature of DLP technology. The active element is an array of tiny mirrors created by silicon machining techniques, one for each pixel. Each mirror can be tilted by a small angle under control from a TV signal. That tilt determines wihether the light falling on it goes to a location on the screen or to a dump. The average intensityof each pixel is determined by the fraction of time the mirror illuminates the screen. The individual mirrors do not scan, they only switch light to or away from one location on the screen. The optics, once fixed, are quite robust. The only variable is the lamp. which has finite life and must be changed. Mike Carrell ------------------- > In reply to Hoyt A. Stearns Jr.'s message of Sat, 6 Jan 2007 > 17:41:40 -0700: > Hi, > [snip] >> >> >>In a digital light processing (DLP) display, a light source (soon to be a >>tri color laser) projects on an array of movable mirrors. The light for >>the >>dark parts of the image are sent to a beam dump. That seems wasteful. Is >>it possible to collect that light and re-introduce it into the primary >>source? > > Instead of using the mirrors to direct the beam to a beam dump, simply > turn the > laser off for a fraction of a second. This will require a change in the > logic > and electronics, but is much more efficient (instead of recovering the > energy, > it is simply not used in the first place). It also means that the mirrors > can > continue to scan the line, maintaining momentum. Then the mirrors need not > be as > easy to maneuver, which is technically simpler and cheaper to implement, > as well > as resulting in a more robust design that produces a better quality image. > Regards, > > Robin van Spaandonk > > http://users.bigpond.net.au/rvanspaa/ > > Competition provides the motivation, > Cooperation provides the means. > > > ________________________________________________________________________ > This Email has been scanned for all viruses by Medford Leas I.T. > Department. >
