Re: Would Water Surface Reflect IR?

["lexfordparc" <paul@xxxxxxxxxxxxxxxxx>]

Dave,

Very informative many thanks for the explanation. The units are quite=20
cheap so I may just buy one and experient.

Many thanks,

Paul

--- In ukha_d@xxxxxxx, Dave Ward <DFHWukha@...> wrote:
>
> Water will reflect IR,  ripples on the surface would also scatter=20
the
> return signal, so it really depends how sensitive the Sharp sensor=20
is.
> Have you asked on one of the robotics forums or even the store if=20
they
> could test it?
> You could also try a simple test.
>=20
> Point a TV remote at a bowl of water and view the result with a=20
digital
> camera.
>=20
> From the datasheet the wavelength (=CE=BB) =3D 850 nm =C2=B1 70 nm
which =
is=20
the same
> as a TV remote IR LED.
>=20
> Most digital cameras, CCTV, Mobile phones, etc are still reasonably
> sensitive to IR at this wavelength even if they have an IR cut=20
filter.
>=20
> HTH
>=20
> Dave