Linear Variable Filters

Electro-optics

Continuously Variable Filters (CVFs) – also known as Linear Variable Filters – from Delta Optical Thin Film offer unprecedented tunability over a large wavelength range, steep filter edges and high out of band blocking. These filters have enabled many applications that was previously not possible.

Continuously Variable Filters (also called Linear Variable Filters) are optical filters whose spectral properties (e.g., centre or edge wavelength) change continuously along one physical dimension of the filter. By sliding or rotating the filter in a light path, you can tune the transmitted wavelength or create an adjustable bandpass over a wide wavelength range, replacing many fixed filters with a single tunable component. They offer steep edges, high out-of-band blocking, and cover various types such as bandpass, long-wave-pass, short-wave-pass, dichroic and order-sorting filters.

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Green Architecture

Evermind™ template is crafted like sustainable structures — clean, scalable, and built to last.

Precision Engineering

Every layout and component is tuned with variables and pixel-perfect details, so your brand stands on solid ground.

Dynamic Interactions

From nature-inspired transitions to fluid page structures, Evermind™ feels alive yet quietly sophisticated.

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What is a Linear Variable Filter (LVF)?

A Linear Variable Filter is an optical filter whose central wavelength varies continuously along its length, allowing wavelength selection simply by translating the filter or sensor array under it.

What is the main advantage of LVFs over discrete filter sets?

LVFs provide continuous spectral coverage in a compact, monolithic component without moving parts, making them ideal for miniaturized spectrometers and hyperspectral imaging systems.

What applications use Linear Variable Filters?

LVFs are used in miniature spectrometers, hyperspectral cameras, environmental monitoring sensors, and medical diagnostics devices requiring compact, cost-effective spectral discrimination.