🚀 go-pugleaf

> > Wouldn't it be just as distracting changing focus from about 4 cm. 
> > (face shield ) to tens of meters ( road conditions ) as it would be to
> > look down at your tank bag?
> 
> Why have to look 4 cm from your eyes?  It should be possible to have the
> display appear to be about 20 meters in front of you, although the type 
> would have to be large...

The optics in aircraft head-up displays are normally set up to make the
image appear to be at infinity, in fact.  (There is very little difference
in eye focus between 20 m and infinity.)  Presumably any similar device
for a motorcycle would function the same way.  Avoiding refocussing of the
eyes is just as important as avoiding the need to look down.
-- 
"We must choose: the stars or	Henry Spencer @ U of Toronto Zoology
the dust.  Which shall it be?"	{allegra,ihnp4,decvax,pyramid}!utzoo!henry