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Optolong H-Alpha 7nm 2" (50.8mm) v.2

US$ 172.47

Availability: IN STOCK

Short Description

The H-ALPHA 7nm filter is the most popular narrow-band filter that allows a 7nm bandwidth centered on a 656nm wavelength.

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Description

Details

Specifications

  • CWL(centre wavelength): 656.3nm
  • Fwhm: 7nm
  • Tpeak: <85%
  • Coating Wavelength: 300-1100nm
  • Optical Denisity: OD3
  • Surface Quality: 60/40
  • Transmitted Wavefront RMS: λ/4
  • Parallelism (arcsec): 30s

 

Reference Spectrum

 

Manufactruring Technique

  • Fine-optically polishing for double-sides—— Ensure accurate λ/4 wavefront and <30 seconds parallalism over the both surfaces
  • Ultrasonic wave cleaning substrate with purified water—— Cleanup by 13 purified water tank to remove inpurities and dust effectively

  • Iro source assisted coating—— For durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.

  • Constantly stringent quality testing processes—— Each filter was tested by spectrophotometer and laser interferometer testing spectrum and wavefront to ensure market filter is qualified product

 

Package Details

  • Silver Cardboard Box
  • Plastic PP Case
  • Imported high pressure EVA case lining

Additional Information

Additional Information

ManufacturerOptolong
NameOptolong H-Alpha 7nm 2" (50.8mm) v.2
MPNHA-2
EANN/A
-- TECHNICAL FEATURES --⬇︎
Diameter2" (50.8mm)

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