Hyperspectral imaging has traditionally been dominated by visible and near-infrared spectral ranges due to the availability of broad-spectrum light sources. Mercury lamps pose challenges with short bulb lives and significant heat generation. Expanding hyperspectral imaging into the ultraviolet spectrum, specifically in the UV-A, UV-B, and UV-C wavelength ranges opens doors for new product development in materials analysis, biomedical diagnostics, semiconductor inspection, and environmental sensing. With the development of high-power, narrowband UV LEDs a promising opportunity arises to bring compact, tunable intensity, multiwavelength, spectrally stable light sources to these previously underutilized wavelengths. This paper explores the integration of UV LEDs into short-wavelength hyperspectral imaging systems, highlighting the unique challenges and opportunities they present including thermal challenges and a lower WPE as compared to the mercury lamps. Key design considerations include wavelength selection and intensity control, along with optimizing the optical train to maximize the utilization of UV LEDs. We will discuss how the narrow spectral bandwidth and intensity tunability of UV LEDs enables targeted excitation for fluorescence imaging, surface characterization, and biological compound detection.

Additionally, the paper addresses the engineering trade-offs in array design, thermal management, and beam shaping optics to maximize irradiance and minimize optical losses. By leveraging recent advances in chip-on-board UV LED packaging, custom and availabilty of ultra-narrow beam optics, it is now feasible to develop compact, modular UV hyperspectral imaging platforms. These systems offer precise spectral control, fast switching, and low power consumption, making them attractive for both laboratory research and industrial applications.

Speaker

Pao Chen CTO Violumas Inc. (COFAN Thermal Group) (United States)

Dr. Pao Chen is the CTO at Violumas Inc. Since joining Violumas, Dr. Chen has held many important positions in engineering management, where he has led research efforts in improving UV LED performance through the innovation of packaging materials, processes, and structure. As a current CTO and prior R&D Director, he manages product development for applications such as semiconductor processing, disinfection, printing, medical treatment, and lighting. Prior to his career with Violumas, Dr. Chen worked for industrial corporations in R&D, manufacturing, and technology marketing—where he devoted himself to the advancement of telecommunication, automotive display, lighting, and circuit protection. Dr. Chen received his Ph.D. and Master degrees in Electrical Engineering from Pennsylvania State University.

 

---

Event Details

FORMAT: Oral presentation followed by audience Q&A.
MENU: Coffee, decaf, tea and water will be available nearby.
SETUP: Theater seating.