High-precision Parabolic Lens DIY Newtonian Reflection Primary
Mirror of Astronomical Telescope D 150mm Focal Length 600 750mm
Specification
Parabolic Lens
Diameter: 150mm
Focal Length 750mm
Focal ratio (the ratio of focal length to diameter) F1.2 or more can be done.
Lens accuracy: Parabolic Lens surface accuracy PV is guaranteed to be better than 1/10 light wavelength,
and spherical aberration is less than 1/15 wavelength.
The mirror blank is made of K9 material and some high boron silicon materials.
The thickness of the lens is 1/8-1/10 of the diameter.
The aluminum coating is added with a silica protective film, and the coating can be used for 8-10 years under moisture-proof storage.
Occasionally, there will be very slight scratches on the surface, which are basically invisible and will not affect use.
35mm secondary mirror:
Elliptical plane mirror, short axis D = 35 mm
Caliber D (short axis): 35 mm
Side thickness H: 10mm
Surface accuracy λ: 1/4
Tolerance: ± 0.5
Coating: aluminized and protective foil
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