Bandpass Filter

Bandpass Filters: Core optical components with a transmission band framed by two cutoff bands — only specific spectral wavelengths pass through, all others blocked entirely.

We keep an extensive selection of standard Bandpass Filters in ready stock, with a full range of specifications available for immediate shipment.

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Material	Optical Glass, Fused Silica, Color Glass, etc.
Dimensional tolerances	+/-0.1mm
Surface Flatness	λ/10~1λ
Parallelism	< 30 arc seconds, <2 arc min
Surface Quality	10/5,20/10,40/20
Optical Density Error	+/-5%
Edge Chip	<0.1mm
Bevel	Protective bevel, or based on clients’ requests
Clear Aperture	>90%
Coating	According to customer's request

Bandpass Filters are versatile high-precision optical components ideal for a broad range of professional applications, including spectroscopy, clinical chemistry and industrial imaging. Classified by bandwidth specifications, bandpass filters are engineered for targeted use cases—with narrow and wide bandwidth options matching the exact demands of spectral analysis, optical detection and visual imaging scenarios.

Narrow bandwidth Bandpass Filters (<20NM) deliver precise spectral transmission, making them the optimal choice for elemental and chemical analysis, analytical optical instruments and laser cleanup applications. By contrast, wide bandwidth **Bandpass Filters** (>20NM) offer flexible light transmission performance, and are widely applied in various imaging scenarios including fluorescence microscopy, industrial machine vision and factory automation systems.

At AOS Optics, we provide high-performance bandpass interference filters with a comprehensive range of half-bandwidths, transmittance ratings and standard sizes available for your selection. We maintain a large inventory of standard Bandpass Filters in stock for immediate shipment, and also offer fully custom Bandpass Filters tailored to your exact technical specifications and application requirements.

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