LPF825nm long wave pass filter

Long wave communicationoptical filter（Longpass Filters）， There are other names, such as high pass filter, long wave filter, long wave filter, long pass filter, etc. Of course, filter is a term used in the digital photography industry. Its optical characteristics are the same, that is, high transmittance of light in the long wave direction, while light in the relatively short wave direction is cut off. It belongs to a type of cut-off filter, which is used in optical precision instrumentsLong wave pass filterIts cut-off depth is more stringent than that of photographic filters, and its quality is also higher.

The Ruicheng Optoelectronics LPF825nm long wave pass filter reflects blue and green light, transmits red light, and the wavelength point with a peak transmittance of 50% is 825nm. The light from 825-1100nm is highly transmitted (>94%), completely cut off from 200nm-810nm, and the cut-off depth reaches OD4. The measured spectral curve in the attachment shows that this filter has high steepness and high transmittance. Compared with ordinary products on the market, its advantages are very obvious.

Technical Parameters:

Process: Ion vacuum hard film process;

Material: Float glass;

Effective wavelength range: 200nm~1100nm;

Incident angle: 0 degrees;

Peak transmittance (T peak):>94%;

Blocking depth: OD4;

Starting wavelength (lambda; cut on): 825nm;

Dimension: Can be cut into circular or square shapes according to customer size requirements;

Surface quality: 40/20;

Surface parallelism:λ /4；

Actual measured spectral curve: