Get inspired by the products we have already made - or let us design your custom Multi-Bandpass Filter
Optical Multi-Bandpass Filters
An optical Multi-Bandpass Filter is a spectrally selective transparent component capable of transmitting two or more distinct bands of wavelengths of light while blocking others.
The filter is fully customisable in terms of centre wavelengths and bandwidths, enabling applications in a broad range of practical technologies including fluorescence spectroscopy, microscopy, flow cytometry and many other applications. Homogeneous Multiple Band Pass filters has the same optical filter function across the complete clear aperture, whereas Continuously Variable Filters offer a filter function that varies along one dimension of the filter.
Delta Optical Thin Film are pioneers and innovators in the design and manufacture of robust optical thin film components for a broad range of volume applications. We have designed and manufactured optical interference bandpass filters since the early 1970’ties.
Most of our products are custom designed filters and the examples we show on this webpage are just for inspiration. We often find benefits for our customers in a custom designed solution. Delta Optical Thin Film is focusing mainly on bandpass filters with passbands in the range from 300 nm to 1200 nm.
Multi Bandpass Filters
Choose from a range of existing multi-bandpass filters
Delta Optical Thin Film manufactures Multi-Bandpass Filters using either Plasma Assisted Evaporation Technology or Magnetron Sputtering Technology, depending on our customers’ requirements. On this web site you can find examples of Multi-Bandpass Filters we have already manufactured.
All data sheets show actual measurements with typical transmission curves for unpolarized light and an AOI=0°.
As we often can optimise design and manufacturing methods to the individual application, please get in touch to discuss how we can best help facilitating your application.
If you cannot find the Multi-Bandpass Filter you need among our standard products, please do not hesitate to contact us to discuss your requirements. When specifying your filter, our technical note on specifying optical filters will help you avoid the main cost drivers in filter design.
Product specifications
| Center wavelengths (nm) | FWHMs (nm) | Tpeak (%) | Product number | Max size | Data sheet |
|---|---|---|---|---|---|
| 338, 548 | 49, 57 | 85 | LF104693 | 60 mm x 25 mm x1 mm |  |
| 338, 570 | 49, 14 | 80 | LF104692 | 60 mm x 25 mm x 1mm | |
| 405, 460 | 20, 20 | 75 | LF104706 | | |
| 500.7, 656.28 | 7, 7 | 90 | LF104691 | Round diameter 50 mm x 1 mm | |
| 425, 527, LP615 | 45, 55 | 85 | LF104707 | Round diamater 25 mm x 2 mm | |
| 582, LP654 | 103 | 95 | LF104708 | 40 mm x 40 mm x 2 mm | |
| 470, 568, 640 | 33, 25, 19 | 90 | LF104696 | 80 mm x 55 mm x 1.1 mm | |
| 424, 513, 591, 709 | 21, 21, 16, 69 | 95 | LF104839 | 80 mm x 55 mm x 2 mm | |
Applications of Multi-Bandpass Filters
Multi-bandpass filters are well suited for fluorescence spectroscopy instruments that need to work with multiple excitation wavelengths and/or multiple emission wavelengths. In this way very versatile and compact instruments can be made that enables analyses of multiple biological materials with the same instrument.
Another typical use of Multi-bandpass filters is in astronomy where the filters are used to filter out very specific atomic lines from deep sky objects
Get in touch
Have a look at our existing products or get in touch regarding your needs – we are the optical filter company.