Wide-angle and ultrathin camera module using a curved hexagonal microlens array and all spherical surfaces

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 FFOV of 136°. The results showed good image quality with a modulation transfer function above 0.3 at a Nyquist frequency of 166 cycles/mm.

Design and Integration of the Single-Lens Curved Multi-Focusing Compound Eye Camera

“…However, the light source used to measure the resolution is white light, which causes chromatic aberration. At the same time, the larger the field of view of the ommatidium and the larger the angle of incident light, the more serious the coma and astigmatism [27]. Therefore, aberrations have a great impact on imaging and need to be reduced.…”

Application of tot’hema eosin sensitized gelatin film for adaptive microlenses

“…Microlenses are lenses with dimensions smaller than 1mm. It can be used, either individually or as microlens arrays, in a various applications such as: wavefront sensors, medicine, quantum computer research and so on [1][2][3][4][5][6][7].…”

Eye-tracked three-dimensional display based on laser backlight modulated by spatial light modulator

“…Two cylindrical microlens arrays (MLAs) are used between two field lenses. Generally, the analysis of ray propagation through MLA can be uniquely carried out by transfer matrix method or so-called ABCD matrix method [29,30]. According to the principle of image formation for paraxial rays in geometrical optics, any optical element or optical system can be described by a 2×2 ray tracing matrix.…”