Graded-index (GRIN) lenses serve as a key component for miniature endoscopes because of their small diameters and ease of assembly. However, the nonaplanatic nature of GRIN lenses causes inherent spatial aberrations that lower image resolution and sharpness. Here we present the diagnosis of the aberrations in GRIN probes and the use of adaptive optics to compensate for the wavefront errors in the endoscope. Two different operation schemes based on preset and in situ measurements are demonstrated, both resulting in a substantial reduction of the wavefront error from 0.42 to .
© 2011 Optical Society of AmericaFull Article | PDF Article
Juergen C. Jung and Mark J. Schnitzer
Opt. Lett. 28(11) 902-904 (2003)
Chao Li, Mingliang Xia, Quanquan Mu, Baoguang Jiang, Li Xuan, and Zhaoliang Cao
Opt. Express 17(13) 10774-10781 (2009)
Rodrigo Aviles-Espinosa, Jordi Andilla, Rafael Porcar-Guezenec, Omar E. Olarte, Marta Nieto, Xavier Levecq, David Artigas, and Pablo Loza-Alvarez
Biomed. Opt. Express 2(11) 3135-3149 (2011)