Green Bandpass Filter
Color longpass filters have long been recommended for use with monochrome cameras to aid in increased contrast and resolution. As the name implies, these filters block UV and shorter visible wavelengths, and pass longer wavelengths of light. Except in those few cases where an IR blocking or other shortpass filter is incorporated into the camera/sensor, for the most part we will recommend the use of one of our broad color bandpass filters (whose designs incorporate these longpass filters) over these color longpass filters alone.
BP530 filters are single substrate absorptive color glass filters that do not employ coatings for additional blocking. MidOpt does not recommend this filter for any machine vision application, however many competitiors offer this as their standard green bandpass filter. Because we often receive requests that will consider only this type of filter, we supply it to those customers who insist upon having it.
For most Green LED or laser appications, we recommend the BP525 Green Bandpass Filter over the BP530. This is because the BP525 has a higher peak transmission (over 90% vs. just over 50% in the case of the BP530), a more compact yet broad peak, complete blocking of UV and IR wavelengths, and much steeper cut on and cut off slopes. All of this translates into far brighter, much higher contrast images when using a BP525 filter instead of a BP530 filter.
Download Excel Spreadsheet with data and curve for this filter.
Examples of filter effectiveness.
Standard Threaded Mounts:
We offer standard filter sizes from stock – 22.5mm to 62mm – for same- or next-day shipping. Larger filters – 67mm to 105mm – are made to order and are normally not returnable.
Click here for PDF drawing of standard mounts
If your lens does not have threads for mounting a filter, Slip Mount adapters are available. Slip Mounts can attach a regular filter to a lens or attach a very large filter to accommodate a wide angle lens. Please call to order Slip Mount adapters.
3mm thick threaded mount
for adding a filter between lens and camera
Click here for PDF drawing of c-mounts