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What is Active Alignment?

Technical Team

One of the most common questions Sunex receives is regarding the need for Active Alignment of lens modules. Initially, customers designing or prototyping an imaging system may find it hard to see the value of actively aligned modules. After all, active alignment requires a significant tooling investment. In addition, during the prototyping phase, customers can typically achieve great results in small numbers by manually focusing the lens and gluing it into an off-the-shelf camera module….

Lens Image Circle

Technical Team

One of the most important specifications for an imaging lens is the image circle. So what is the image circle of a lens ? This question is often asked without a clearly definition of the image circle. This article will attempt to clarify the concept of image circle and discuss what’s to be expected from real-world lenses in terms of image circle. When a lens is first designed the designer must choose a maximum field…

CCD/CMOS lens selection guide

Technical Team

Once the imager is chosen,  the process for selecting a lens consists of the following steps: Determine the desired field of view (in angles if the object is at infinity, and in actual sizes if the object is at a finite distance). Calculate the required focal length of the lens, and the image circle size. We have created a wizard to perform this calculation. Choose an appropriate lens f/# based on similar lighting environment and…

Material Guide

Technical Team

Optical components are fabricated using a variety of materials including optical glasses,  engineered plastics and crystalline materials. Glass material is the most common type because of its excellent optical properties such as high light transmission and environmental stability. There are many types of glass materials suitable for making optical components. The specific selection depends on the optical performance requirement, environmental suitability, ease of fabrication and cost.  The main characteristics of an optical material are represented…

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