Re: BTFR question

[Steve Hodges <shodges@xxxxxxxxxxxxxx>]

Clive Warren wrote:
> 
> >Or reflected off it.
> >
> >Steve
> 
> Yep, good point.
> 
> Depending on the filter material and how the coating is carried out.  I
> would bet that 95% of the light hitting the filter makes the trip through
> to the film and the then 95% of the reflected light from the film makes it
> back through the filter to the light sensors.

Ah!  95% of the IR goes through.  But what of the visible light?

(The answer you were supposed to give is that the filter material is
glossy rather than matt, and that reflections are likely to be specular
rather than diffuse.  As such, reflections from the filter should not
reach the sensor)

I thought of that after I posted the original.

Steve
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