Re: Splittng light without losing the image....?

A composite image is recommended as the recordtion of the experimental
setup. A calibration of the colors using lasers is all that is
required to ensure a factual record. A reason is the hard calibration
of the unknown source in a live time fashion. A set of filters to
ensure calibrated record is possible but expensive. Live-time
filtration has the disadvantage of record variation. Each film, has to
have the associated calibration.

So if you must do live-time filtration what is the best method?

A color filter is a slot. And to allow color appears the idea of the
next best filter. A slot filter without using dyes.

A photoelectric sensor can be tuned for each color. Just have the
voltage calibrated.
So photomultipliers, PMTs, can do your sensing without alteration.

Eight PMTs. And the advantage is a large sensitivity.

Silicon sensors are quite novel now and likely also available. CdTe
designs maybe?

And it get expensive instrumentation wise. Making the single
multispectral sensor the idea of cost.

Inverted cavity theory allows a current to sense. A photon interior as
inside the cavity allows a special sensor. A single available
application is single quanta sensing. So place the special cavity,
inverted, near the PMT tube.

And the brag crystal is allowed to alter the sensor to allow single
quanta detection where the sensor is the source. A single quanta
scattered form the PMT tube surface will also sense the bragg scatter
crytal. It reflects as it absorbs! And this allows a single quanta
sensor. A set of quanta will always cause its current. And the
reflected fraction defines the sensor ideal.

Ideal means the fraction of crystal interactions per PMT sensing.

And of course this is a single channel of the old EPR experiment of
Aspect.

An energy ideally scatters.

Ergo have crystals of know quality do the filtering by thin layer
scatterring.

Just a rmeinder.. A crystal layer over the old style pMT tube sensing
surface denies as a slot.





RobofNZ wrote:
Hi Guys,
I'm hoping that this is the right group for the question....

I'm trying to find a way to split an incoming light stream by bandwidth
without using colour filters.....

The reason being that the incoming image contains a great deal of noise
across the spectrum and conventional imagery can't cope I'm hopeing
that by splitting the stream into 8 narrow band streams and processing
each seperatly I will be able to filter out the additional noise.....

Additionally the target image is very weak, so it's important to
minimise losses (hence no filters and the need to record the streams in
parallel).

Thanks for your help,
Rob.

.

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