At 09:04 PM 8/11/2004, Alexandre Guimaraes wrote:

>Hi, mike
>
>    I worked with some of these barcode sensors and I think that they have
>too litle depth of view to be usefull in you application. It has the emitter
>and a phototransistor or photodiode and lenses in a TO5 can. They are made
>to stay in very close focus all the time..

The HP HEDS units are made for non-contact.  You can turn them into contact units with a spherical lens.

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.