Leiden University Student Repository

Hacken, Milan ten (2024)

Polarization resolved hyperspectral imaging of beetles

Bachelor thesis | Natuurkunde (BSc)

This thesis explores the application of polarization resolved hyperspectral imaging as a technique to study the optical properties of beetles, in particular the P. s. jousselini. A setup and method is provided to measure the four Stokes parameters in hyperspectral resolution, from which the state of polarization is retrieved. The reflection spectra of the P. jousselini are analyzed and fitted to a double Lorentzian. The resulting parameters conclude a different photonic strength for each of the two visible peaks as well as a varying Bragg wavelength. Furthermore, the spectra between different individuals posses distinct shapes and properties, suggesting a role of environmental factors in the exocuticle’s development. In chapter 6, other subfamilies of Scarabaeidae are imaged as well and a relation between reflection and polarization spectrum is discussed. The accuracy of the setup is, in the end, criticized for reasons that include: optical placements, uneven illumination and angle...Show moreThis thesis explores the application of polarization resolved hyperspectral imaging as a technique to study the optical properties of beetles, in particular the P. s. jousselini. A setup and method is provided to measure the four Stokes parameters in hyperspectral resolution, from which the state of polarization is retrieved. The reflection spectra of the P. jousselini are analyzed and fitted to a double Lorentzian. The resulting parameters conclude a different photonic strength for each of the two visible peaks as well as a varying Bragg wavelength. Furthermore, the spectra between different individuals posses distinct shapes and properties, suggesting a role of environmental factors in the exocuticle’s development. In chapter 6, other subfamilies of Scarabaeidae are imaged as well and a relation between reflection and polarization spectrum is discussed. The accuracy of the setup is, in the end, criticized for reasons that include: optical placements, uneven illumination and angle of incidence. Improvements to the setup deem necessary when the goal is to more accurately explore the optical properties of various subjects.Show less

Polarization, hyper spectral imaging, beetles, optics, homochirality

Author

Hacken, Milan ten

Faculty

Faculty of Science

Supervisors

Dood, M. J. A. de

ECTS Credits

3

Language

en