Re: Infrared sensitivity of Silicon PhotoDiodes

[Clive Warren <Clive.Warren@xxxxxxxxxxxxx>]

At 11:31 am -0500 6/1/98, howard wells wrote:

>Anthony W. Maw wrote:
>
>> Hi all:
>>
>> Does anyone know what if any sensitivity SPD's have in the infrared
>> band?
>
>Hello All,
>
>This thread reminds me of a discussion I had some months ago about  the
>possibility of manufacturing an IR exposure meter. I was talking to a
>small electronics manufacturing concern that makes test equipment for
>the photographic industry.  They indicated that it would be easy to do
>but were not sure anyone would be interested.  Is anyone?  I have always
>had pretty good luck metering (or guessing) IR exposure but it does seem
>as though an IR meter would makes life easier. And exposure does seem to
>be the most asked question from thosew just getting into IR work.  What
>do you all think?
>


If the meter is a simple incident/reflected jobby that is reasonably priced
sounds great to me.  If the meter could also be used for ordinary light by
sliding an 87 style filter from the front of the sensor, then even better!

The older analogue style of dial is always easier to use than digital when
you want to quickly comprehend the range of exposure options open.

Batteries should be AA or similar to ensure they are easily obtainable.

A bit of string to hang it round your neck and a simple pvc case would
round off the package nicely.

Put me down for one.....


All the best,

              Clive   http://clive.bel-epa.com


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