Re: [photo-3d] Digest Number 65

[Olivier Cahen <o_cahen@xxxxxxxxxxxxxxxx>]

	Hello. I do not understand why you need such a sophisticated equipment.
I already answered this question in a short response to Allan Griffin in
the last December issue of "Stereoscopy", you could easily find it even
if you are not yet a member of the ISU.
	Allan talked about using a professional oscilloscope, and did not know
how to find one and how to use it.
	Simply use your home oscilloscope, I mean your TV set, take a picture
of the same TV image with your two cameras, you will esaily measure the
difference of exposure times and the time lag between your camera
shutters, with a precision better than a milliseconds. No need to
understand electronic circuitry for that.
	If you subscribe to the ISU, you will find more and more simple
technical information in the next issues of "Stereoscopy".

Brian Reynolds, in Photo-3d@xxxxxxxxxxx, Digest 65, message 11, wrote :
> 
> That's more a circuit problem than an oscilloscope problem.  You need
> to design the circuit so that you can tell which photo transistor is
> on without needing mutilple inputs on hte oscilloscope.  One way to do
> this is by adding resistors to the circuit as a voltage divider.
> 
> Radio Shack has a series of very useful circuit booklets written by
> Forest Mims III.  They're fairly small and printed on graph paper.
> There is probably one on using light sensors that would have a useful
> circuit.
>

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