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Inhoudsopgave

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iv <strong>Inhoudsopgave</strong><br />

5 Situering van dit onderzoek............................................................. 37<br />

Referenties ............................................................................................. 39<br />

Hoofdstuk 2: Belichtingssystemen met LED’s ...............................43<br />

1 LED als lichtbron ............................................................................ 43<br />

2 LED-merken.................................................................................... 47<br />

2.1 Luxeon (Lumileds) ................................................................ 47<br />

2.2 OSTAR (OSRAM) ................................................................ 48<br />

3 Lichtcollectie en homogenisatie ...................................................... 49<br />

3.1 Commerciële collectielenzen................................................. 49<br />

3.2 Ontwerp van collectiereflectoren........................................... 55<br />

3.2.1 Parabolische reflector .................................................. 56<br />

3.2.2 Elliptische reflector...................................................... 59<br />

3.2.3 Resultaten reflectoren .................................................. 63<br />

3.3 Alternatieve collectiecomponenten ....................................... 64<br />

3.3.1 ‘Tapered Light Pipe’-model......................................... 64<br />

3.3.2 Gradually Tapered Light Pipe...................................... 66<br />

3.3.3 Multi-LED-systemen met GTLP ................................. 68<br />

3.4 Besluit belichtingssyteem ...................................................... 70<br />

4 LED gebaseerde illuminatiesysteem met GTLP’s........................... 70<br />

4.1 Simulatie GTLP voor 0.82” lichtklep.................................... 71<br />

4.2 Fabricage ............................................................................... 73<br />

4.3 Experimentele waarnemingen ............................................... 74<br />

4.3.1 Collectie-efficiëntie binnen het gewenste f-getal......... 74<br />

4.3.2 Polarisatie recuperatie systeem.................................... 76<br />

4.3.3 Étendue recuperatie systeem........................................ 77<br />

5 Besluit.............................................................................................. 79<br />

Referenties ............................................................................................. 81

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