I think he means interferometry. ----- Original Message ----- From: "vetri" To: Sent: Wednesday, January 14, 2004 2:46 AM Subject: Re: [OT]: Laser question > Some of the cheap pointers use Super Luminescent LED with optics to make > the beam parallel. These and many other laser pointers are often pulsed > to minimize average current as well as to reduce the risk of thermal > damage to the source. I doubt if you could modulate them to produce > short enough pulses, if you are thinking of laser radar like > arrangement. > > Perhaps a camera mounted next to the laser could look at the laser spot > and use triangulation to give distance - check out Keyance website. They > have such distance sensors. > Method you choose would depend on what distances you want to measure and > how accurate it needs to be. But the cost?? > > > Vetri > -----Original Message----- > From: pic microcontroller discussion list > [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of rad0 > Sent: Tuesday, January 13, 2004 9:32 PM > To: PICLIST@MITVMA.MIT.EDU > Subject: [OT]: Laser question > > I've recently got a couple of cheap laser pointers. > > And I was wondering if there is a way to measure distance with them? > > I have a crazy idea, but I'd like to ask the question first and see if > there > is a standard answer to this question. > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.