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Lumicon 2.0" H-BETA

H-BETA
$205.00
CWL: 493.5 +/- 3.0 nm
FWHM: 25.0 +/- 5.0 nm
HP: n/a
Transmittance: 486nm, 496nm & 501nm >= 90%
Blocking  T < 0.1% @ 436 nm
Blocking  T < 0.01% 440-467 nm
Blocking  T < 0.01% 523-630 nm
Reflectance (design goal)  
1 of the 2 surfaces = 1% Max @ 493.5 nm **
   
Optical Properties:  
TWF: <1.5 Waves, prior to coating
Parallelism: < 30 arcsec.
   
Dimensions:  
Diameter: 2.0 +/ -0.010"
Thickness: 2.0 +/- 0.25 mm
Clear Aperture: 1.95" minimum
   
Cosmetics:  
Pinholes: No pinholes larger than 0.1 mm. Ignore pinholes smaller than 0.025 mm. No more than 5 pinholes between 0.1 and 0.025 mm within any 20 mm diameter area.
Surface Quality: 60-40 Scratch-Dig
  No Chamfer
   
Operating Conditions: AOI=0°, Collimated Light