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Filtro Optolong CLIP EOS H-Alpha 12nm [OPTOLONG]

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Technical Data







    • Schott substrate material



 




    • Thickness 2.0 mm (1.25”/2”/36mm)



 




    • Thickness 1.0 mm (Clip series)



 




    • Surface Quality: 60/40 (Refer to MIL-O-13830)



 



  • Fine-optically polished to ensure accurate 1/4 wavefront and

  • 90% transmission at H-alpha line 656nm


  • Infrared wavelength 700-1100nm cut-off


  • 0.1% transmission of off-band, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm). Transmission of 0.1% is equivalent to OD3(Optical Density), and a high optical density value indicates very low transmission, and low optical density indicates high transmission.


 


Coating Parameter







    • Non-cementing optical substrate coating



 




    • Electron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change



 




    • Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band






Filter Cell







    • Ultra-thin filter cell minimize vignetting by maximize possible clear aperture (clear aperture is 26mm for 1.25”; 45mm for 2”)



 




    • Aerometal Material | Precise CNC Machining | Sand Blasting Process | Black Anodized Finish | Extinction Treatment to Prevent Reflection | Laser Engraving No Fading



 

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