Bifocal-polarization holographic lens.
We present a holographic lens with novel features recorded in an azopolymer film. Two holographic modulations, bulk birefringence and surface relief, are induced in the medium at the same time. The resultant holographic element has two focal planes, and the polarization of light in the focal points depends on the polarization of the incident light. Applications of this device for writing-reading information in two planes simultaneously or separately are described.
Martinez-Ponce
Geminiano
G
Central Laboratory of Optical Storage and Processing of Information, Bulgarian Academy of Sciences, P.O. Box 95, 1113 Sofia, Bulgaria.
Petrova
Tsveta
T
Tomova
Natalia
N
Dragostinova
Violeta
V
Todorov
Todor
T
Nikolova
Ludmila
L