sažetak izlaganja sa skupa
Mechanical design of a 120-band hyperspectral imaging system
Sažetak
One of the main and most important characteristics of any multispectral or hyperspectral system is the number of spectral bands it can record. A higher number of bands ensures a higher spectral resolution and a larger amount of data available for later processing. However, increasing the number of bands represents a problem and a challenge from the standpoint of mechanical design. A higher number of bands means a larger number of spectral filters, which also means a larger and more complex positioning system. A significant increase in the number of filters turns the system from a
multispectral to a hyperspectral one. When designing and building a system with over 100 bands, mechanical challenges become exceptional, especially when larger filters are used.
This paper will present the design and development of a mechanical system capable of positioning 120 spectral filters, while maintaining a compact and simple mechanical design. The system is scalable and capable of positioning an arbitrary number of spectral filters. An additional unique challenge with our system is the use of three sets of different cameras and lenses used to extend the imaging spectral range to 350 to 1700 nm. In other words, the system must simultaneously position and pair individual cameras with appropriate spectral filters. The positioning of both systems was achieved using two rotational and one linear motion system. The main components of the system were made using additive manufacturing, which ensures quick and easy modification of the system if the number of filter changes. The entire system was powered by off-the-shelf stepper motors and electronics, while motion was managed by an Arduino microcontroller. Custom microcontroller software was developed that automatically matches cameras with appropriate spectral filter based on the spectral band requested by the user. The developed system represents the main building block of our hyperspectral imaging system.
Ključne riječi
hyperspectral, camera, additive manufacturing