STATO DELL’ARTE DELLA RETE BIRIFRANGENTE PASSIVA

STATO DELL’ARTE DELLA RETE BIRIFRANGENTE PASSIVA

Nilanjan Mukhopadhyay

113,15 €
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Editorial:
KS OmniScriptum Publishing
Año de edición:
2023
ISBN:
9786206383086
113,15 €
IVA incluido
Disponible
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L’ottica di polarizzazione si basa esclusivamente sul fenomeno della birifrangenza. I materiali che presentano naturalmente la birifrangenza trovano spesso applicazione nei dispositivi di polarizzazione, anche se questo fenomeno può essere indotto esternamente in alcuni materiali. Tuttavia, le loro prestazioni dipendono dalla lunghezza d’onda, definita cromaticità. In molte applicazioni, però, sono richiesti dispositivi acromatici. Pertanto, l’eliminazione di questa dipendenza cromatica è un campo interessante per i ricercatori in questo settore. Materiali come il quarzo cristallino, l’MgF2 ecc. sono ampiamente utilizzati per la progettazione di ritardatori di fase acromatici che forniscono una differenza di fase costante tra due componenti ortogonali della luce in un’ampia gamma di lunghezze d’onda. In questo libro, sono state introdotte reti birifrangenti basate su piastre d’onda degli stessi materiali e nuove combinazioni di materiali birifrangenti diversi per ottenere un comportamento superacromatico in ampie regioni di lunghezza d’onda. Inoltre, viene discusso un filtro ottico con una nuova rete birifrangente che presenta una caratteristica di trasmissione a banda stretta nel campo del visibile per applicazioni astronomiche.

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