We present a compact light-field camera built using a flat-surface gradient index (GRIN) microlenses array. First, we report on the design, fabrication and characterization of a hexagonal array of nanostructured GRIN microlenses suitable to build the camera. The concept of a nanostructured GRIN microlens is based on the effective medium theory. The nanostructured GRIN lens is composed of several hundred subwavelength rods made with the use of the stack-and draw technique, which was originally devised for fabrication of photonic crystal fibers . A single GRIN microlens is fabricated from two different glasses, one with low and one with high refractive index value . To develop a hexagonal array of nanostructured GRIN lenses we apply a modified stack-and-draw technique as a second step. The finally-formed element is made of 469 GRIN micro lenses, each 20 μm in the diameter, and is characterized by 100% fill factor. The flat-surface element is easy to integrate with other optical components.
|Title of host publication||The European Conference on Lasers and Electro-Optics 2017|
|Publisher||Optical Society of America|
|Publication status||Published - 25 Jun 2017|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Mechanics of Materials