Economical near IR bandpass filters for low power use; 750 – 1900 nm CWL; OD ≥ 3 absolute, x-ray to 3500+ nm. With extended out of band blocking from x-ray wavelengths through 3500+ nm, these moderate transmission near infrared bandpass filters are an economical choice for low power applications. Passbands range from 1.5 -70 nm at center wavelengths from 750 - 1900 nm, with OD ≥ 3 absolute blocking (OD 4 average). Custom filters available upon request.

Bandpass interference filters for near IR wavelengths (750 - 1900 nm) offer moderate transmission over a 1.5 - 70 nm passband for a large variety of center wavelengths in the near infrared.  These economical dielectric filters offer minimum peak transmission values ranging from 35 – 60%, depending on the center wavelength and design.  Out of band blocking is extremely broad, extending from x-ray wavelengths to 3500+ nm.  Blocking is guaranteed to be OD ≥ 3 absolute, and OD 4 average over the range.  They are not recommended for use at high power, however, and do not have sufficient blocking for use in applications requiring high signal to noise or strongly scattered laser light.  These filters are useful for low power laser line cleanup, or for selection of a specific signal band.  
• Available from stock for 750 – 1900 nm CWL, with 35 – 60% minimum peak transmission 
• Out of band blocking: OD 4 average, OD ≥ 3 absolute from x-ray to 1200 nm
• Standard diameters from 25.0 - 50.0 mm, 0.5 - 1.0 in
• Custom center wavelength, bandwidth, optical blocking and sizes available