Edge filters are divided into:
LP — LongPass Filters
SP — ShortPass Filters

Thin Film’s edge filter features:

Ultra-Hard-Coated filters.

Optical Surface Specifications 60/40 (TopPrideTM), else 80/50.

Standard dimension is dimensions on request.

The data sheets show typical transmission curves for unpolarised light and an AOI=0°.

If you need further information, please contact us. We can also develop your custom specific edge filter.

LongPass Filters

Optical long pass filters are edge filters used to cut out wavelengths that are not required. The filter removes all wavelengths from the desired cut off point and transmit the longer wavelengths. For example, a long pass filter with an 850nm cut off point would transmit virtually no power from the UV, visible and NIR up to 850nm, beyond which the transmission would rise steeply to the filter’s peak value generally better than 80%.

Because longpass filters isolate specific wavelengths, long-pass filters are desirable in systems where they can be used to trim excess wavelengths or stray light to reduce unwanted near band emissions. Industry applications include order sorting in photometry and fluorescence.

ShortPass Filters

Short-wave pass edge filters are specifically designed to transmit wavelenghts shorter than the cut-off wavelength while rejecting longer wavelengths. Shortpass filters can be used in many applications and can be used with longpass filters for custom bandpass filtering. We offer standard dielectric coated short pass filters, higher performance dichroic filters and short-pass filter sets.