Line pair based full field sharpness test

Patent metadata

Field	Value
Publication number	US-9307230-B2
Application number	US-201213630359-A
Country	US
Kind code	B2
Filing date	Sep 28, 2012
Priority date	Jun 29, 2012
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

Optical characteristics of an optical component for a high volume manufacture consumer electronics device can be tested using a test chart composed of a superposition of two or more groups of parallel line pairs, wherein all the groups of parallel line pairs are oriented at a different inclination. The groups of line pairs could be oriented so that they are perpendicular to each other. A test system can quickly and objectively assess for example the sharpness of the optical component in different directions across a full image field of view of an imaging system that is capturing a digital image of the chart using the optical component for through-the-lens imaging. Other embodiments are also described and claimed.

First claim

What is claimed is:

1. A test system for testing digital camera devices, comprising:
a test chart for evaluating optical characteristics of a camera device under test (DUT), the chart comprising a surface that is to face the DUT and in which there is a superposition of two or more groups of parallel line pairs, wherein all of the groups of parallel line pairs are oriented at different inclinations;
a light source to provide uniform visible light intensity and color incident upon…

Assignees

• Apple Inc

Inventors

• Wu Fei
• Gamadia Mark N
• Shen Shizhe

Classifications

• H04N17/002 Primary

  Electricity · mapped topic