US Patent 9459430 Wide-angle depth imaging lens construction

Embodiments are disclosed herein related to the construction of optical elements for depth sensor systems. One disclosed embodiment provides a wide-angle lens construction comprising a first, negative stage, and a second, positive stage positioned behind the first, negative stage along an optical axis of the lens construction. The second, positive stage further comprises a first positive lens substage, a second positive lens substage, a third positive lens substage, the second positive lens substage positioned between the first positive lens substage and the third positive lens substage.