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Designing a Spectrograph for Observation of Microparticles in the Ionosphere
KTH, School of Engineering Sciences (SCI).
2014 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

In this report the development of a spectrograph for confirming the size of the particles in a particle cloud is described. With the wavelength dependency of Mie-scattering, it can be determined if the particles are of the desired size. There is a significant trade-off effect between size and resolution of an optical system. The spherical aberrations that arise due to the focal length being short compared to the lens diameter are reduced by using lens combinations called achromatic doublets, both as collimating and focusing lenses. The manufactured spectrograph has a resolution of about 10 nm that is approximately as expected from the optical design. But the spectrograph suffers from stray light. This remains to be reduced with aperture stops, non-reflective interior and fore-optics.

Place, publisher, year, edition, pages
2014. , 8 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-153799OAI: diva2:753832
Educational program
Master of Science in Engineering -Engineering Physics
Available from: 2014-10-09 Created: 2014-10-09 Last updated: 2014-10-09Bibliographically approved

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Electrical Engineering, Electronic Engineering, Information Engineering

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