Trade fair highlight 08. July 2020

Aspheric lenses have its advantages in a range of applications where eliminated spherical aberration or (and) single element design is required. CASTECH offers CNC precision-polished aspherical and acylindrical lenses, with or without anti-reflection (AR) coatings. Our CNC polished aspheric lenses are iteratively ground and polished by a software supported computer-controlled processing center to provide better controlled surface quality, irregularity and focal length deviation.

CASTECH employs rigorous verification procedure to guaranty the high performance of our each aspheric lens. A Form Talysurf PGI profilometer allows contact measurement in grinding process while Taylor Hobson LuphoScan 260 non-contact 3D optical surface profilometer performs ultra precision optical surfaces form measurement in polishing process.

Common Specifications:
Material from DUV to IR
Custom dimension and shapes
Diameter from 5 to 200 mm
Clear aperture: Central 90% of diameter
Irregularity : λ/10@632.8nm
Surface quality: 20-10 S/D
Centration: ＜3′
Standard and custom coating options available
High laser damage threshold