At 11:09 AM 2/03/99 EST, you wrote:

Check out the STREETA device for RI at Texas Instruments. I do not know the
price but may be suitable.


Peter

>Hi
>
>I want to use a laser or led as a light source and some kind of a diode array
>receptor to measure the critical angle of refraction for a automotive fluid.
>The measurement device will be a small handheld unit and I need to keep
>pricing low ($250 retail). The device should be able to test different types
>of fluid with different angles of refraction and the software will be used to
>allow that use.
>
>Any ideas ?
>Does anyone know of an inexpensive diode array receptor or way to measure
>where light is received?
>
>Is there any kind of a light potentiometer that reads the position of a beam
>of light and output the result?
>
>Maybe another less expensive method?
>
>
>Thanks
>
>Jon
>
>