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Author Topic: diy spectroscope  (Read 2145 times)

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Offline p1taylor

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diy spectroscope
« on: 11:21:57, 16 March, 2013 »
Hi All, This may have been don before, I want to make a spectroscope or is it spectrograph out of 2 camera lenses and a reflective grating, to go on my Meade RCX 10", I guide with a ZS 80II ED and Lodestar, been imaging for a good few years and want a change, are there any drawings of how to do make one.

peter
rcx 10", sxh9c, lodestar, zs 80 ed, and bits & peaces

Offline andrew s

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Re: diy spectroscope
« Reply #1 on: 11:45:22, 16 March, 2013 »
This is a great place to start http://www.astrosurf.com/buil/spectrographs.htm - Regards Andrew

Offline p1taylor

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Re: diy spectroscope
« Reply #2 on: 13:35:49, 16 March, 2013 »
Thanks Andrew, there is a lot to sort out, I was hoping for drawings and measurements.

peter
rcx 10", sxh9c, lodestar, zs 80 ed, and bits & peaces

Offline Nomis Elfactem

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Re: diy spectroscope
« Reply #3 on: 15:13:54, 16 March, 2013 »
Peter - one of the best places for such info is the Astronomical Spectrocopy Yahoo group here: http://tech.groups.yahoo.com/group/astronomical_spectroscopy/

Just join up and you will have access to a wealth of information and quite a few of the guys on there pop up here every now and then !

Prepare yourself though... it's not quite as straight forward as you may hope for !  One of the most important pieces of the jigsaw is the variable slit and sadly they are like hens teeth in the UK.  Go onto Surplus Shed's website in the US and you should find one there assuming they have some in stock !

Here's a link to Ken Harrisons (Merlin66 on here) homemade spectrascope which may be of use http://www.iceinspace.com.au/index.php?id=63,339,0,0,1,0. 

Ken is a great resourse and has indeed written a couple of excellent books on the subject which are well worth buying/reading (http://www.amazon.co.uk/gp/search/ref=pd_lpo_ix_dp_am_us_uk_en_gl_book?index=blended&keywords=ken%20harrison%20spectroscopy&tag=lpo_ixdpamusukengl_book-21)

Also, as a first step, another option is to go for a Star Analyser (Bern @ Modern sells them and see here http://www.patonhawksley.co.uk/staranalyser.html).  I got one last year but due to the appalling weather we've had for the last year whenever there's been a clear night I've gone for standard imaging so haven't actually used it yet.  Hopefully I'll get it out over the summer when it's a bit light for imaging.

Anyway, good luck and be sure to show us your progress in the Projects board !

S.
Simon

Scopes: Astro-Tech AT-111EDT Triplet, TS65ED Quad, Orion ST80, Modded PST-90 Solar Scope, PST Cak (on loan)
Cameras: SXVF H694, Atik 16ic, Canon EOS 600d, DMK41, DMK21, QHY 5L-II (mono & colour)
Accessories: SX USB Filter Wheel, SX OAG, Baader LRGB Ha SI OII Filters, SharpSky Focuser
Mount: EQ6 (EQMOD), SW Star Adventurer, plus a lot (and I mean a lot) of other bits and pieces

Offline p1taylor

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Re: diy spectroscope
« Reply #4 on: 00:09:46, 17 March, 2013 »
Thanks for info Simon, I have joined yahoo group from reading I have don shofar best bet I have found is one using a 200mm camera lens and a CD will have a go and see what aspens.

peter   
rcx 10", sxh9c, lodestar, zs 80 ed, and bits & peaces

Offline tomhow

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Re: diy spectroscope
« Reply #5 on: 18:39:27, 27 September, 2013 »
if you haven't already, a good place to start is this

www.patonhawksley.co.uk/staranalyser.html

www.modernastronomy.com/accessories.html#diffGratings

Use it like a normal filter  - no extra lenses or slits required. Admittedly it only works well on brighter targets and needs a bit of fiddling to make sure the spectrum isn't polluted by field stars, but you easily get up and running and have  a lot of fun before getting into the more advanced stuff like slits etc.

Good fun on planetary nebs as well as stars
http://astro.neutral.org/imagehtml/20050817_PK_64_5.1.html

Can work with fainter stuff as well, e.g.

http://astro.neutral.org/imagehtml/20050408_3c273.html

Those aren't with that exact product, but with a similar forerunner.

The Star Analyser is dead good because it is blazed, making the first order image bright for working more efficiently.
Tak Sky 90, Atik 490, Homemade Mount, OAG, Lodestar

The Curdridge Observatory

 

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