Distributed Focus and Digital Zoom

TL;DR

This paper introduces a new integrated microcamera focus system for array cameras that enables digital zoom across various focal lengths without reducing resolution or enlarging aperture, using a common mechanism for different modules.

Contribution

It proposes a novel model for system camera integration with fast action focus mechanisms supporting a wide range of focal lengths in array cameras.

Findings

Supports focal lengths from 25 to 60 mm

Designs include fixed objective and adjustable back focus groups

Enables long focal length systems with microcamera modules

Abstract

We explore integrated microcamera focus systems for array cameras. We propose a new model for system camera integration relying on fast action focus mechanisms with >10mm aperture. Rather than reducing resolution or expanding aperture size, such systems can be used in arrays to enable digital zoom. We show that a common mechanism supports camera modules with focal lengths ranging from 25 to 60 mm. Designs for each focal length include a fixed objective lens group and an adjustable back focus group. Increasing the focal power of the front focal group enables the travel range of available microcamera modules to accommodate long focal length systems. We present design examples both discrete and multiscale array camera systems.