The diagram shown above indicates that the air pressure inside the sealed chamber has been increased. At this point the CWL of the bandpass is at 656.28nm. At this position we are looking at the Hydrogen-alpha line and the energy associated with that wavelength. The sealing of the cavity is done via the collimating and…
Lunt Solar Systems recently introduced the new Pressure Tune system, or Doppler True Tuning system. The image above shows the basic outline of this system. The internal etalon is at ambient pressure. The tuning of the etalon is slightly low, putting the Center Wavelength (CWL) at the red wing of the Hydrogen line. This provides…
It’s probably doesn’t come as any surprise that Lunt Solar Systems LLC is involved in R&D projects outside the field of Solar Filters and Telescopes. But it is because of our highly technical and specialized skills that we are often asked to develop unique optical elements that fall within our capabilities and my interests. Some…