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Improved approximation of spatial light distribution [Elektronski vir]Kaljun, David ; Novak, Tina, 1977- ; Žerovnik, Janez, 1958-The rapid worldwide evolution of LEDs as light sources has brought new challenges, which means that new methods are needed and new algorithms have to be developed. Since the majority of LED ... luminaries are of the multi-source type, established methods for the design of light engines cannot be used in the design of LED light engines. This is because in the latter case what is involved is not just the design of a good reflector or projector lens, but the design of several lenses which have to work together in order to achieve satisfactory results. Since lenses can also be bought off the shelf from several manufacturers, it should be possible to combine together different off the shelf lenses in order to design a good light engine. However, with so many different lenses to choose from, it is almost impossible to find an optimal combination by hand, which means that some optimization algorithms need to be applied. In order for them to work properly, it is first necessary to describe the input data (i.e. spatial light distribution) in a functional form using as few as possible parameters. In this paper the focus is on the approximation of the input data, and the implementation of the well-known mathematical procedure for the separation of linear and nonlinear parameters, which can provide a substantial increase in performance.Source: PloS one [Elektronski vir]. - ISSN 1932-6203 (Vol. 12, nr. 4, Apr. 2017, f. 1-16)Type of material - e-articlePublish date - 2017Language - englishCOBISS.SI-ID - 15491355
Author
Kaljun, David |
Novak, Tina, 1977- |
Žerovnik, Janez, 1958-
Topics
LED |
light distribution |
least square problem |
reduction of parameters |
Newton's method |
singular value decompostion |
LED |
porazdelitev svetlobe |
problem najmanjših kvadratov |
redukcija parametrov |
Newtonova metoda |
singularni razcep
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Kaljun, David | 35436 |
Novak, Tina, 1977- | 32686 |
Žerovnik, Janez, 1958- | 03430 |
Source: Personal bibliographies
and: SICRIS
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