TITLE:
Study and Design of Hybrid Triplet Lens
AUTHORS:
Nuha F. Al. Al-Hariby, Abed M. Kassim, Issam H. Al-Ahdali
KEYWORDS:
Design Algorithm, Cooke Triplet Lens, Hybrid Triplet Lens, Gradient Index Medium
JOURNAL NAME:
Optics and Photonics Journal,
Vol.5 No.4,
April
30,
2015
ABSTRACT: This
study presents a new method for designing algorithm for a triplet lens with one
or two elements that are made of a gradient index medium (GRIN). This method is
based upon considering a well-known designed triplet lens (Cooke triplet lens)
as a target lens for designing of the Hybrid Triplet Lens (HTL). Our design was
based upon keeping the total optical path length for the axial ray fixed for
each case of design. The results showed that several designs for the HTL have
the same total powers of the target lens. These designs depend on the variation
of the GRIN element parameter values and the order of the GRIN element position
in the system. These HTL designs have been evaluated by considering several
optical merit functions, i.e., the
root mean square (RMS) spot radius, wave front error and the spherical
aberration. To achieve the optimal design, these functions are compared for the
target lens and the HTL designs through a wide range of field angles.