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spectrohelioscopes · observe H alpha light spectrohelioscope

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  • Members: 233
  • Category: Amateur
  • Founded: Aug 17, 2000
  • Language: English
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Description

Spectrohelioscope is telescope and spectroscope combined together in straight line, can be folded up in U-shape. A heliostat(Newtonian diagonal) or two mirror coelostat reflects sun light into system. A solar image synthesizer is in middle, and it wipes 24 solar images per second inside the eye at safe brightness level. Narrow passbands from 0.1A to 0.05A can be used for metals (Fe I, Mg I, Na I), 0.2A for He I yellow helium and 0.6A for H alpha, just vary width of the slits and tilt the grating.Wood tools, nuts and bolts, metal pieces,common sence. Costs about $600,including Edmund holographic grating of $150, 30 x 30mm area of 1200 gr/mm or 1800 gr/mm. Portable, compact for a car. See Sky and Telescope, January of 1969. Laser optics,1/10 wave both sides,available, about $100 per plano-convex lens. Lens for telescope of 50/1000mm f.l. used with -250mm Barlow 2X give 2000mm e.f.l., 19mm sun image.Lens for the spectroscope can be 50/1000mm f.l. Eyepieces are simple single lenses 25mm diameter, 50 to 60mm f.l. for spec-mode and 110 to 130mm f.l. for SHS-mode.The visual spectrum has 4000 lines, one meter long spectrum.See H alpha and yellow He in emission on solar limb. Yellow He in dark absorption in bright plage on solar disk.Zeeman effect in spot umbra. Also flares and surges and proms.Put digital camera in line with 40mm f.l. Hastings eyepiece at exit slit and get instant spectrograms. With a moving synthesizer get spectroheliograms. Set digital camera on infinity focus, open lens wide, set on time.Few seconds wipe H alpha solar disk inside the camera for shgram.New shs web site for 2007 <<www.eyes-on-the skies.org/shs>>.Questar Corp for all solar wavelengths vio to red.Meudon solar observatory,Paris, solar spectrograms of low and high resolution solar atlas. Kitt Peak for photospheric profile atlas of solar spectrum.I have free 119 page book on SHS. New first article Zeeman effect by SHS, Journal British Astro Association, Feb 2006.

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