Spectrometer

[geppetto]

You can tell I'm bored cause of the weather

Anyway decided to make a smaller spectrometer than the one I made in a wooden

box using a CD disc for the grating..

Sent off to Surplus Shed for an adjustable optical slit and

a grating mounted on a glass slide.

Been Aralditing a 1.25" eyepice tube to one end of the optical slit so that at some

point, I can mount it in the scope.

Meantime, I mounted the bits either end of a cardboard tube to have a test run

and the two components give a nice spectrum in white light.

Manage to take a picture through the grating with my D40..

Here are the links to the components

http://www.surplusshed.com/pages/item/m1570d.html

http://www.surplusshed.com/pages/item/m1569d.html

More to follow when/if I get it all to work on the scope

[Kaptain Klevtsov]

Looks like fun Phil! More info as you test it please.

Kaptain Klevtsov

[jonifive]

Phil...is there any stopping you!

There is a job going at my place, it'll stop you building the spaceship you are obviously gearing up for!

"From Bolsover to the Moon"

Jonathen

[lunator]

Phil

Looks a fun project

keep us posted

Cheers

Ian

[AstroTiger]

in truth

i would be every interested in having a go at one of these. any chance of you posting the plans?

Many thanks

Al

[geppetto]

any chance of you posting the plans

If I get a result from it Al, I will post all the details.

Just playing it by ear at the moment to see what works.

Hoping to properly mount the components this weekend

[SteelRat]

Another crackin Geppetto build - good stuff Phil. Keep us informed eh? 8)

[geppetto]

Another shot, another spectrum

This time the light from a low energy light bulb.

The grating works well, clearly showing the different spectrum

to that of white light.

[lunator]

Phil

interesting shot.

Bulbs looks very stron in the green & red.

[AstroTiger]

it would be interesting to see how that would work against the stars

has anyone else done this/tried this?

Alk

[geppetto]

it would be interesting to see how that would work against the stars

It's looking promising

Last night I held the bits of the spectrometer against the eyepiece (reallly needed three hands)

Eyepiece projected Arcturus into it and looking through the grating, there was a spectrum.

A bit dim but there, should be able to pull it out with the camera..

In the meantime, a few more spectrums taken with the D40

[mikkey99]

Looking good Phil

You`ll have to post a build your own spectrometer thread so we can all have a go

Mike

[Astroman]

You've got emission spectra nicely, but the interesting stuff is in the absorption spectra. Can you spread the spectrum out any more? Maybe change the distance from the grating to the slit?

[geppetto]

Can you spread the spectrum out any more?

Not sure yet AM, need to setup the stuff on a "test bench" to alter parameters.

Struggling trying to hold all the bits to be honest...

Good fun and it's all helping grandaughter with her school science stuff as well

[themos]

This is an exciting development for amateur stargazers. Gratings or Fabry-Perot interferometers, though?

[Grant]

Excellent stuff Geppetto!

Just stumbled across this, thought you might be interested: http://astro.neutral.org/eq/spec.html

[geppetto]

Great link Grant...

Thanks mate 8)

[lunator]

it would be interesting to see how that would work against the stars

has anyone else done this/tried this?

Alk

AT

Here is some spectra of the brighter stars taken by a member of the Webb Society

http://www.webbsociety.freeserve.co.uk/

Cheers

ian