2 documents found, page 1 of 1
Oblique astigmatism and field curvature measured with light-field imaging
Ferreira, Flávio Pedro Gonçalves Fernandes; Sousa, Marco A.; Duarte, Moises A. S.; Bret, Boris P. J.; Nunes-Pereira, E. J.The testing of astigmatism and field curvature of an optical system with light-field imaging is proposed. The method consists in measuring the depth map, obtained with a plenoptic camera, of the image of a test pattern formed by the optical system. To demonstrate the accuracy of the method, the virtual image formed by a piano-convex lens was tested. The resulting depth map was compared with the sagittal and tan...
Single shot plenoptic optical imaging inspection of a head-up display: Projecti...
Duarte, Moises A. S.; Nunes-Pereira, E. J.; Bret, Boris P. J.; Forte, Paulo M. F.; Ferreira, Flávio Pedro Gonçalves Fernandes; Sousa, Marco A.A single shot automatic optical inspection system for evaluating the projection distance, astigmatism, field curvature and geometric distortions of a virtual image created by a Head-Up Display (HUD) prototype is presented. The system uses plenoptic or light-field imaging. Although results are only presented for a Augmented Reality (AR)/Mixed Reality (MR) HUD application, the inspection workflow is also applicab...