Multispectral Imaging in the SWIR with Optical Filters
Hyperspectral imaging is a powerful tool, enabling differentiation of multiple targets in highly dynamic environments. In some cases, it is the only solution. However, many machine vision applications can be addressed with multispectral techniques that are generally less expensive than more complex hyperspectral systems.
On Wednesday, July 20, join Principle Product Engineer John Atkinson of Chroma Technology Corp. in a discussion about optical filter technology in the SWIR wavelength range, practical applications for multispectral techniques, and appropriate filter specification.
Atkinson begins the session with a brief overview of hyperspectral and multispectral analysis. Hyperspectral imaging is a powerful tool, enabling differentiation of multiple targets in highly dynamic environments. In some cases, it is the only solution. However, many machine vision applications can be addressed with multispectral techniques that are generally less expensive than more complex hyperspectral systems.
There are various approaches to multispectral imaging, including the use of multiple cameras, a single camera in conjunction with a filter wheel, and multiband filters with multiple lights. The specifics of the application, including the environment in which the imaging must be accomplished, determine which approach is most appropriate. Many challenging machine vision applications — from food inspection and assessing crop health to semiconductor inspection and waste sorting — require clear, accurate object or feature detection.
High-quality optical filters can control image contrast, which is what enables an imaging system to differentiate between objects. Multispectral techniques using optical filters are the most cost-effective for applications where a spectral signature provides the basis for contrast enhancement. For the most challenging applications, a high degree of spectral precision is required to highlight the otherwise imperceptible color differences.
Multiband SWIR filters that can be customized in both their edge placement and their bandwidth allow for optimal solutions at a fraction of the cost of a hyperspectral imaging system. Atkinson discusses optical filter technology in the SWIR wavelength range, practical applications for multispectral techniques, and appropriate filter specification.
For more information about this conference or to register, click here.
About Chroma Technology
Chroma Technology is a leading manufacturer and OEM supplier of high performance optical filters used in a wide range of applications, including health care, biomedical research, remote sensing, machine vision, and aerospace. Chroma offers an extensive selection of catalog products as well as custom solutions tailored to our customer’s specific needs.
To request more information or a quotation for this or other Chroma products, contact IL Photonics.