BS ISO 14490-9:2019 Optics and photonics. Test methods for telescopic systems Test methods for field curvature

Curvature
Test methods
Optical instruments
Optics
Telescopes
Optical properties of materials

Link: BS ISO 14490-9:2019 Optics and photonics. Test methods for telescopic systems Test methods for field curvature
Source: BSI Standards