Useless information. You said spectrometer and I read spectrofotometer...
:(

On 6/22/06, Vasile Surducan <piclist9@gmail.com> wrote:
> Building the electronics of a simple spectrofotometer it's easy if you
> have the optics. First you have to define clearfully the optical range
> (visible, UV, infrared)
> and the sensitivity. Then you have to decide if will be with one or two s=
pots.
> One spot will make easy your life but will increase errors regarding
> the probe alignement during calibration/measuring sequence.
>  One important aspect is choosing the optic style (difraction plate,
> prism, etc) and the dimension of cuvettes for the probes (which
> determine the spot dimension also).
>  One easy sollution is to buy the difraction chamber and the
> photodiodes assembly (there are up to 1024 diodes, capturing the whole
> visible spectrum once)
> or to build your own detector and amplifier (which is quite easy for
> lightwave between near infrared ~900nm to blue 400...430nm) and make
> yourself the wavelenght monocromator assembly. The problem here is the
> alignement of wavelenght, you must have a good reference source for
> this job, or at least a set of interferential filters with very low
> bandwith (which is difficult because filters below 5...10nm bandwith
> are hard to found)
>  I've modified in my life about 10 or maybe 20 proffesional optical
> spectrum analyzers made with Karl Zeiss optics in the old time between
> '65 to '75.
> You can't see anymore such jewels.
>  The microcontroller side is just the end of the job, because if you
> don't have an excellent analogic design, the rest could be unusefull.
>
> success,
> Vasile
>
>
>
> On 6/22/06, G=F6khan SEVER <gstr2005@gmail.com> wrote:
> > Hi,
> >
> > In this summer break we are plannig to develop a spectrometer in our
> > university. Although i've some emdedded design knowledge and experience=
 i
> > havent produce any biomedical devices previously. From now on i want to
> > determine a solid thesis subject on biomedical area.
> >
> > Probably some of the PIClist members had been developed similar devices
> > before and should be many members that are knowledgable on biomedical d=
esign
> > field. So, Could you please guide me some on this diverse variety field=
 to
> > find my way?
> > --
> > http://www.piclist.com PIC/SX FAQ & list archive
> > View/change your membership options at
> > http://mailman.mit.edu/mailman/listinfo/piclist
> >
>

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