INTERFERENCE FILTERS WITH HIGH TRANSMISSION AND LARGE REJECTION RANGE FOR MINI-SPECTROMETER

The invention relates to an interference filter (100) for receiving an incident light (135) and selecting a light component of the incident light to be transmitted (115). The interference filter (100) includes a metal mirror (110), a dielectric mirror (130), and a spacer (120) placed between the met...

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Bibliographische Detailangaben
Hauptverfasser:	MEIJER EDUARD JOHANNES, TIMMERING EUGENE
Format:	Patent
Sprache:	eng
Schlagworte:	COLORIMETRY COMBINED OPERATIONS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACHINE TOOLS MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING METAL-WORKING NOT OTHERWISE PROVIDED FOR OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS OTHER WORKING OF METAL PERFORMING OPERATIONS PHYSICS RADIATION PYROMETRY TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TESTING TRANSPORTING UNIVERSAL MACHINE TOOLS
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Beschreibung
Zusammenfassung:	The invention relates to an interference filter (100) for receiving an incident light (135) and selecting a light component of the incident light to be transmitted (115). The interference filter (100) includes a metal mirror (110), a dielectric mirror (130), and a spacer (120) placed between the metal mirror (110) and the dielectric mirror (130). The metal mirror (110) and the dielectric mirror (130) are configured to enable optical interference in the spacer (120) to select the light component of the incident light to be transmitted (115). Using one metal mirror and one dielectric mirror allows achieving a spectral response with high finesse and large rejection band while reducing the total number of layers in the filter and reducing the number of additional filters necessary for removing transmitted side bands, relative to prior art approaches.