Filters

Eureca supplies high-quality optical filters for development, laboratory, and series applications—from classic fixed filters to tunable solutions.

Interference Filter

Our interference filters are based on dielectric thin films. Precise filter characteristics (e. g., bandpass filters, edge filters, blocking filters, fluorescence filters) are created through targeted layer combinations. For many applications, this is the standard when it comes to high transmission, steep edges, and defined blocking ranges.

Continuously Variable Filters (CVF / LVF) from Delta Optical Thin Film

If you want to adjust wavelengths flexibly without constantly changing filters, continuously variable filters are an elegant alternative: the spectral property changes along the filter—adjustment is done by position (and, depending on the optics, also by rotation). A single CVF can thus replace many fixed filters or even a monochromator-like setup and is also interesting for order filtering in diode array spectrometers.

Absorption Filter

Absorption filters use material-specific absorption (e. g., colored glass, plastics, IR filters). They are often cost-effective and robust when extremely steep slopes are not required.

Neutral Density Filter (ND)

Neutral density filters are used for defined intensity attenuation across a broad spectral range, e. g., for exposure/SNR optimization or to protect sensitive detectors.

Custom Cuts

We offer laser cutting (primarily plastic) for prototypes and series production – quickly and easily.