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Cut-off Linear Variable Filter

Cut-off linear variable filter is an interference filter whose cut-off wavelength varies linearly with physical position. Continuous gradient based on film thickness, utilizing the interference effect of light to achieve wavelength selection. Continuous and adjustable spectral filtering is achieved through a single filter, greatly simplifying system design and serving as a powerful tool for miniaturization, integration, and dynamic spectral analysis of equipment. From miniature spectrometers to multispectral imaging, from industrial sorting to scientific research equipment, its applications can be found.

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Specification of Cut-off Linear Variable Filter


Wavelength

(nm)

Peak transmittance

(%)

Depth of cut-off

Pass band

Linear rate of variable

(nm/mm)

NOTE

400-800

≥85

≥OD3

Short pass

7


Customized be met

400-800

≥85

≥OD3

Long pass

7

380-850

≥85

≥OD3

Long pass

22.3


ECOPTIK at APE 2026
Exhibition time: February 4-6, 2026Exhibition address: Sands Expo & Convention Centre, SingaporeBooth No. B234

18

2026.03

ECOPTIK at SPIE Photonics West 2026
Exhibition time: January 20-22, 2026Exhibition address: Moscone Center, San FranciscoBooth No.:#1767

18

2026.03

Pushing the Boundaries of Vision: Custom Plan Apochromatic Objectives by ECOPTIK
Top-tier scientific research and demanding industrial applications can't afford compromise. When standard optics fall short, you need a partner capable of engineering vision at the microscopic lev...

30

2025.10

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