VOLUME-PHASE HOLOGRAPHIC GRATINGS FOR ASTRONOMICAL SPECTROGRAPHS
VPH Grating Physics (true holographic gratings)
Theoretical Diffraction Efficiency (h)
Bragg Envelopes
VP Grating Configurations
VP Grating Structures
Typical VP Grating Parameters
Dichromated Gelatin
NSF Funded Study of VPH Gratings
300 l/mm VPH Grating
1200 l/mm VPH Grating
2400 l/mm 532 nm VPH Grating
Ha/Hb Multiplex Grating
Spectrum of 18th magnitude, blue compact galaxy obtained with the Ha/Hb multiplex grating with a fiber feed on the 2.1-meter telescope at Kitt Peak National Observatory.
RCWA Predicted Efficiency for VPH Reflection Grating
1200 l/mm VPH Reflection Grating
Conclusions and Future Effort
Email: barden@noao.edu
Home Page: http://www.noao.edu/ets/vpgratings/
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