A method of manufacturing a microlens device by depositing a microlens
material layer over a substrate that includes photo-sensors. The
microlens material layer is then exposed and developed to define
microlens material elements, including first microlens material elements
and second microlens material elements. Each second microlens material
element is substantially greater in thickness relative to each first
microlens material element. The microlens material elements are then
heated to form a microlens array that includes first microlens array
elements, each corresponding to a first microlens material element, and
second microlens array elements, each corresponding to a second microlens
material element. Each first microlens array element has a substantially
greater focal length relative to each second microlens array element. For
example, each second microlens array element is substantially greater in
thickness relative to each first microlens array element.