Mirror Grinding of Aspherical Mirror and Lens
Machining Example of Aspherical Lens Grinding Machine (Nano machine)
「転写誤差ゼロ」を追求できるナノ加工機はナガセインテグレックス。超精密非球面ミラー・レンズ加工機N2Cseriesによる非球面ミラー・レンズの研削加工・鏡面加工の事例をご紹介します。
Grinding of The World's Largest Aspheric Mirror and Lens.
Mirror grinding of aspherical mirror and lens is the process of grinding a brittle material workpiece, such as glass, to an aspherical shape and mirror surface. In the past, lapping with loose abrasive grains was the norm, but NAGASE has made mirror finishing possible even grinding with fixed abrasive grains. This has made it possible to significantly reduce the time required to fabricate large optical mirror and lens. Mirrors machined on NAGASE's ultra-precision grinding machine are used in the Subaru Telescope at the National Astronomical Observatory of Japan Hawaii's "Subaru Telescope" and the "Kanata" at the Hiroshima Observatory.
Works
Ultra Precision Mirror Surface Grinding of Aspherical Mirror
Form accuracy: Less than±1μm
Roughness: 1nmRa, 7nmRz
Material: Clearceram
Size: ⌀250 x 50mm
Machine: N2C-53US4-N4
Mirror Grinding of Ultra Precision Mirror
Form accuracy: 0.8μm
Roughness: 1.3nmRa, 9.9nmRz
Material: Clearceram
Size: ⌀200mm
Machine: SGC-630αS4-Zero3
Machining of The Split Mirror of The Seimei Telescope
Amount of time: 26days/piece
Form accuracy (after polishing): Less than 0.15μm
Form: Off-axis hyperboloidal surface of approximate sphericity (R=10m)
Material: Clearceram
Size: 1000 x 700m (a fan shape)
Machine: N2C-1300D
Machining of The Split Mirror of The Seimei Telescope (Machining accuracy)
Form accuracy (After grinding): Less than 1μm
Form accuracy (After polishing): Less than 0.15μm
Roughness (After grinding): rms 80nm
Roughness (After polishing): rms 2nm
Aspherical Surface Grinding of Toric Lens Mold
Roughness: 1nmRa, 7nmRz
Material: Carbide
Size: 100 x 24 x 18mm
Machine: N2C-53US4-N4
Aspherical Surface Grinding of f-θLens Mold
Form accuracy: Less than 0.3μm
Material: BK-7
Size: 176 x 20mm
Machine: N2C-53US4-N4
Inquiries
We are experts in ultra-precision machining, If you have any type of machining problems, please feel free to consult us.
Consultations are free of charge. First, please tell us about the precision, size, materials, etc. related to the machining you are considering.
For test machining, prototype machining support, or equipment utilization, our experienced engineers at our Technical Center will examine the most appropriate methods and respond promptly.
(For urgent cases, please contact our regional sales offices.)