In high-quality digital maging systems, optical low-pass filters (OLPF) are used to eliminate color Moire fringes. An OLPF cuts off the lens MTF above the sampling frequency of the imager resulting an overall MTF curve that approximates a step function in spatial domain. IR cut-off function is often incorporated into OLPF as well. For a day night OPLF filter,it allows both visible and infrared LED light to pass through.

OLPF filters(optical low-pass filters) are made from optical quartz crystal and used on digital cameras to eliminate color Moire fringes and cut off IR light.

It can be used for Digital cameras,digital vidicons, CCTV,Mobile phones,surveillance camera,IP cameras,Day night camera,security cameras, IR camera,Video phones,DSLR(digital single lens reflex)

Optical index

Size(L.W.T.): Φ 8/9/10/11 mm (Optional)
Center wavelength: CWL 650/850nm
Transmission band: 415~635nm/835-860
Cut-off band: 700-760nm/950~1050nm
Material: UV Fused Silica
Transmission wavefront error: λ/4 @ 643/863 nm
Parallel difference: Surface finish: 40-20
Diameter tolerance: +0.0/-0.1mm
Thickness: 0.55 mm ±0.05mm
Center wavelength tolerance: ±1%
Transmittance T: Tavg>90%
Cut-off zone depth: OD4
Cut-off band steepness: Effective aperture: >90%
Incident angle: 0°

Package

Round 650/850 nm OLPF IR filter 50 PCS/lot