What's it about?

We will present a case study of a characteristic freeform production optic that required an absolute positioning measurement procedure utilizing a custom dual computer generated hologram (CGH) interferogram set-up. © 2019 The Author(s)

OCIS codes: 220.1140 Alignment, 220.1250 Aspherics, 220.4610 Optical Fabrication, 220.4840 Testing


Freeform surfaces have been gaining popularity in several different types of imaging and non-imaging systems. With that popularity has come an increasing demand on optical fabricators to produce higher precision optical surfaces for increasingly more complex optics. Freeforms have also transitioned out of R&D into manufacturing production. The case study presented here is a characteristic example of a freeform surface that was made in a production manufacturing environment. The focus of this study will be on the absolute freeform surface measurement...