It takes images, about 16x16 pixels, and correlates them looking for
offset.  The light comes in at a grazing angle so the texture of the
surface shows up.

Sherpa Doug

> -----Original Message-----
> From: Pedro Drummond [mailto:digicall@IFXBRASIL.COM.BR]
> Sent: Wednesday, October 03, 2001 11:46 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [EE]: Optical mouse technology
>
>
> How does it work ? It seems to have a laser diode and a photo
> sensor, but
> how is it able to respond to movements in every direction ?
>
> TIA,
>
> Pedro.
>
>
>
> ----- Original Message -----
> From: Tony Nixon <Tony.Nixon@ENG.MONASH.EDU.AU>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Tuesday, October 02, 2001 7:37 PM
> Subject: Re: [OT]: Engineering trivia
>
>
> > Barry Gershenfeld wrote:
> > >
> > > I didn't realize folks down under knew Yogi Berra.
> > >
> > > Barry
> >
> > Isn't that a friend of Boo Boo??
> >
> > --
> > Best regards
> >
> > Tony
> >
> > mICros
> > http://www.bubblesoftonline.com
> > mailto:sales@bubblesoftonline.com
> >
> > --
> > http://www.piclist.com#nomail Going offline? Don't AutoReply us!
> > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body
> >
> >
> >
>
> --
> http://www.piclist.com hint: To leave the PICList
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>
>

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