Wide-angle and ultrathin camera module using a curved hexagonal microlens array and all spherical surfaces
Journal
Applied Optics
Journal Volume
53
Journal Issue
29
Pages
H121-H128
Date Issued
2014
Author(s)
Liang, W.-L.
Abstract
In this paper, we propose a wide-angle and thin camera module integrating the principles of an insect's compound eye and the human eye, mimicking them with a curved hexagonal microlens array and a hemispherical lens, respectively. Compared to typical mobile phone cameras with more than four lenses and a limited full field of view (FFOV), the proposed system uses only two lenses to achieve a wide FFOV. Furthermore, the thickness of our proposed system is only 2.7 mm. It has an f-number of 2.07, an image diameter of 4.032 mm, and a diagonal FFOVof 136°. The results showed good image quality with a modulation transfer function above 0.3 at a Nyquist frequency of 166 cycles/mm. © 2014 Optical Society of America.
Other Subjects
Microlenses; Optical instrument lenses; Camera modules; Compound eye; Field of views; Hemispherical lens; Hexagonal micro-lens arrays; Mobile phone cameras; Nyquist frequency; Spherical surface; Cameras
Type
journal article