Astronomical telescope 20mm-140mm reflector Telescope secondary mirror For Sale
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Astronomical telescope 20mm-140mm reflector Telescope secondary mirror:
$7.32
Astronomical Telescope 114mm Reflective Telescope Secondary Mirror
Inclined Mirror Mirror
Dongda Newtonian telescope secondary mirror
Type: Elliptical plane mirror
Short axis length: D=20/25/27/35/40/44/48/50/52/53/56/60/62/70/78/80/90/96/100/102/127/140mm
Dimension tolerance: ±0.5mm
Surface accuracy PV: 1/4-1/6λ
Coating: aluminum reflection + protective film
Elliptic Plane Mirror Axis D = 25mm
The Diameter D (Minor Axis)
25mm
The Focal Length F
--
Edge Thickness H
4.8mm
The Surface Precision Λ
1/3
Tolerance
±0.5
Coating
Aluminum plus Protective Film
Note
Used as Optical Axis Steering of Newton Astronomical Telescope
