SUBSTRATE FOR AN OPTICAL FILTER AND OPTICAL FILTER

The present invention relates to an improved substrate for optical filter and optical filter. The substrate includes a filter glass containing SiO_2, ZnO, K_2O, and a cadmium chalcogenide, and the filter glass has TeO_2 content of 0.1-3 wt%, preferably from more than 1.0 wt% to 7.0 wt% of CoO conten...

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Bibliographische Detailangaben
Hauptverfasser:	RITTER SIMONE MONIKA, KOLBERG UWE, BIERTUEMPFEL RALF, NIESSNER LOTHAR
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	The present invention relates to an improved substrate for optical filter and optical filter. The substrate includes a filter glass containing SiO_2, ZnO, K_2O, and a cadmium chalcogenide, and the filter glass has TeO_2 content of 0.1-3 wt%, preferably from more than 1.0 wt% to 7.0 wt% of CoO content based on an oxide. The filter glass has a first cut-off range on visible range of spectrum, a passband on near infrared range of the spectrum, and an edge wavelength (λ′_i0.5) between 700 and 840 nm and a first transmission edge based on a 0.3 nm thickness of the filter glass. 본 발명은 개선된 광학 필터용 기판 및 광학 필터에 관한 것이다. 상기 기판은 SiO, ZnO, KO 및 카드뮴 칼코겐화물을 함유하는 필터 유리를 포함하며, 이 필터 유리는, 산화물을 기준으로, 0.1∼3 중량%의 TeO함량 및 1.0∼7.0 중량%, 바람직하게는 1.0 중량% 초과 내지 7.0 중량%의 CoO 함량을 가진다. 필터 유리는 스펙트럼의 가시 범위에 제1 차단 범위를 갖고 스펙트럼의 근적외선 범위에 통과대역을 가지며, 0.3 mm의 필터 유리 두께를 기준으로 700 nm 내지 840 nm의 에지 파장(λ') 및 제1 투과 에지를 가진다.