Filter
- Optical filters selectively transmit or block specific wavelength bands of light to filter unwanted light and improve signal-to-noise ratio. Main types include dielectric filters, colored glass filters and neutral density filters.
Features
• Precise wavelength selection
• Stable thin film coating
• Low stray light
• High transmittance in target band
• Custom size & substrate available
Application
Widely used for fluorescence detection, machine vision, laser and spectroscopic systems. Available in multiple substrate options for visible, UV and infrared applications.
Specifications
• Component Shape: Optical Filter
• Substrate: N-BK7, UV Fused Silica (Standard), CaF₂, ZnSe (Custom only)
• Wavelength Range:
• N-BK7: 350 nm – 2.0 μm
• UV Fused Silica: 185 nm – 2.0 μm
• CaF₂: 200 nm – 7.0 μm
• ZnSe: 600 nm – 16 μm
• Surface Quality:
• N-BK7 / CaF₂ / ZnSe: 60-40 Scratch-Dig (40-20 optional)
• UV Fused Silica: 40-20 Scratch-Dig
• Surface Flatness: λ/4
• Thickness Tolerance: ±0.1 mm
• Dimension Tolerance: +0.0 / -0.1 mm
• Clear Aperture: >90% of surface
• Coating Options: Bandpass / Longpass / Shortpass / Neutral Density coating
• Size Range: 3 mm – 60 mm