The University series filtering system is designed for serious research programs requiring full aperture
spectral uniformity.   Systems are fabricated from the finest optical and filtering components available.

• Clear and usable aperture:    32 mm. (1.25").
• Bandwidth measurement:    Full aperture 32 mm. (1.25").
• Fully blocked transmittance:  4%-10% of polarized light. Lower values correspond to narrower bandwidth
  filters.
• Spectral uniformity:    The peak wavelength of any 12 mm. dia. area shall be within ± 0.05 ångström of the
  full aperture wavelength measurement.
• Off-band rejection:    Average optical density is greater than 6.0 from X-ray to beyond 2.0 m .
• Optical components:    BK-7 grade A, fine annealed 60-40 scratch-dig. Each optical element other than the
  etalon has a maximum wave front distortion of 1/4l @ 5461Å Hg.
• Air-glass interfaces are V-coated for a maximum of 0.2% reflectance per surface at the designed wavelength.

The ATM series filter system is designed to meet the needs of most amateur solar observers.

• Clear and usable aperture:    32 mm. (1.25").
• Bandwidth measurement:    19 mm. (0.75") central aperture.
• Fully blocked transmittance:    4%-8% of polarized light. Lower values correspond to narrower
  bandwidth filters.
• Off-band rejection:    Average optical density grater than 6.0 from X-ray to beyond 2.0 microns .
• Optical components:    Selected instrument quality.
• Air-glass interfaces are anti-reflection coated in the filtering assemblies.

The T-Scanner series filter system is designed for visual observers requiring effective filtration without access
to AC power. Optical specifications are identical to the ATM series with the exception that the filter clear aperture
is reduced to 30 mm. (1.18").

DayStar Filter Temperature Regulated Oven

Over the ambient temperature range of 0^o C. to 35^o C., the oven will control the on-band operational temperature to ± 0.5^o C. or equivalent to ± 0.05Å wavelength tracking.

Dimensions: Diameter: 76 mm. (3.00") Length: 43 mm. (1.70") Length with filter mounting plates: 56 mm. (2.20") Weight: Approx. 0.453 Kg. (1.00 lb.).

Power: 8w.-12w. @ 115v., 50-60 Hz. Three wire grounded power cord 2 meter (6.60 ft.) in length.

Filter systems can be readily used on compound and refracting telescopes.  We do not recommend using our filters on Newtonian telescopes.  Achieving the focal position for proper filter operation my be difficult and require substantial modification to your optical system.

Return to Home Page

DayStar Filters LLC^™ 149 Northwest OO Highway   Warrensburg, MO 64093 - USA
Telephone: 660-747-2100 • jen@DayStarFilters.com • FAX: 1-866-791-0448