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Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here -- Ignore unavailable to you. Want to Upgrade?

To: Bill Fischofer who wrote (6646)	3/13/2000 1:28:00 PM
From: MikeM54321	Read Replies (1) \| Respond to of 12823

"Gilder makes reference to "diffusion" as the means of preventing eye problems which is why the receiver is the size of a small satellite dish (presumably to allow it sufficient beam gathering power)." Bill- That may solve the downstream beam, but what about upstream beams back to the base station? Was there mention at how this would work? Better yet, what is the physical description of equipment used for upstream path? Thanks. -MikeM(From Florida)

To: Bill Fischofer who wrote (6646)	3/13/2000 1:40:00 PM
From: silicon warrior	Read Replies (1) \| Respond to of 12823

I don't understand what the problem is. Just have the user inform everyone in a one block area never to use binoculars or telescopes cause they're shooting lasers around all the time and they might get blinded!! If they object, tell them not to worry, George Gilder said its "diffused" into "shards of light".

To: Bill Fischofer who wrote (6646)	3/15/2000 3:58:00 PM
From: gpowell	Respond to of 12823

implies that the transmitting laser is swept through an arc Do you really mean swept? If Terabeam's system is point to multipoint, the output of the laser could be optically spread as part of the system design. It's conceivable that each cell could have an optical output aperture measured in feet and hence, a large coverage area, as defined by the optical design, the total power used, and the efficiency of the receiving system.

To: Bill Fischofer who wrote (6646)	3/23/2000 6:03:00 PM
From: MikeM54321	Read Replies (1) \| Respond to of 12823

Bill and Thread- Remember our discussion regarding eye safety and Terabeam. The below is from an article Bernard linked to on Frank's thread. Not that I can evaluate the statement, but just thought I would throw it out there. -MikeM(From Florida) *********************** The emerging industry already has been careful to avoid the space-age associations with comic book laser guns and eye surgery lasers. "This you can look right into, even with binoculars, and it doesn't harm the human eye**," said TeraBeam vice president of business development Stephen Gartside, noting the U.S. Food and Drug Administration doesn't require any warnings on usage of free space lasers. The lasers used for communications networks cannot be viewed by the naked human eye because of the frequency at which they operate. "Those infrared lasers are no different than your TV remote controller," MIT professor Chan said. "I think (radio frequency) has more potential for health issues than lasers."