esto es una prueba

1. Developing a Littrow Spectrograph Mary Masterman Westmoore High School & University of Oklahoma

3. The Double Slit Experiment

4. Why Does This Happen?

6. What Happens

7. http://www.src.wits.ac.za/pages/teaching/Connell/phys284/2005/lecture-02/lecture_02/img21.png What Happens

8. Graph from Scott Hesser. Photo from http://www.thespectroscopynet.com/Educational/Diffraction.htm . -1st -2nd 1st 2nd The Double-Slit Experiment With Different Colors

9. 1st Order -1st Order Transmission Grating White Light 0th Order Camera (or Screen)

10. Reflection Grating

11. 2004 38 ° classical spectrograph

12. 38 ˚ Classical Spectrograph Disadvantages: Long, heavy, stuck out from telescope Low Resolution: longer lens needed Solution: Try Littrow Configuration Theory : Christian Buil, France

13. New Spectrograph: 2006

14. Light path: side view

15. Light Path: top section

17. Fabricating Body

18. Body/ Mirror

19. Grating Holder

20. Adjustable Slit

21. Camera Mount

22. Aligning Spectrograph

23. Using on Telescope

24. Wavelength (Angstroms) Intensity (ADUs) Solar spectrum w/ Fraunhoffer lines Camera: Canon Rebel DSLR (no Telescope)

25. M42 Nebula Neon calibration spectrum SII NII H α NII

26. 0 th Order- center image on slit M57 30cm f/10 telescope 60 sec exposure

27. M57 Spectrum near H  OIII OIII H  Vega H 

28. M57 Spectrum near H  H  NII NII SII SII OI OI

30. Crop The Image After acquiring the image, the desired spectrum must be cropped from the raw image.