This range of interference band-pass filters are used to isolate and transmit a specified narrow wavelength and reflect all other incident wavelengths in the spectrum
Typically, our filters are 3-7 cavity and in most cases blocking is metal dielectric from 200nm to FIR (3000+nm) at OD4. We can also supply interference bandpass filters with dielectric blocking on request.
The individual filters are CNC scribed and hermetically sealed to form a stack in their rings, ensuring maximum long-term stability. Although our standard stock range is mounted, un-mounted types with aerospace paint blackened edges can be supplied at request. All our interference bandpass filters are supplied with a transmission curve; ASCI files are available on request.
For more information on our stock range of narrowband filters, or to enquire about a custom quote, please contact our technical sales team.
| Diameter & Aperture (mm): Thickness (mm): Blocking: CWL Tolerance (nm): HBW Tolerance (nm): Optimum Operating temperature: Edge Treatment: Edge Marking Format: Surface Quality: Usable Temperature Limits: Design Type: Assembly: |
12.5mm ± 0.2 (8.5mm aperture) 25.0mm ± 0.2 (21mm aperture) 50.0mm ± 0.2 (46mm aperture) 6.1mm +/-0.2 <0.01% (OD4) @ 200nm to 1150nm (for filters with CWL less than 380nm) <0.001% (OD5) @ 200nm to 1150nm (for filters with CWL between 380nm and 1064) <0.001% (OD5) @ 200nm to 1850nm (for filters with CWL between 1080nm and 1640) ± 20% of FWHM ± 20% of FWHM 23°C Mounted in black anodized aluminium ring In most cases {Knight Optical Part#} - {KOLTD} - arrow in direction of light path 80/50 -50°C to +80°C Typical 3 cavity design All filters are scribed and hermetically sealed to ensure maximum long-term stability (Information sheet on scribed interference filters) |
Please telephone our technical sales or email with your specification.
Dielectrically blocked filters are available for increased performance.
Stock filters can be supplied in pre-mounted threaded rings.
Other bespoke sizes to your specification either mounted or un-mounted.
Unmounted interference filters available, sealed around edges with high quality aerospace paint.
Small one-off or small batch quantity for new projects at very competitive prices and normally delivered within 6 weeks.
Alternative imperial sizes are available at short notice, normally within 1-2 weeks.
12.7mm dia: 8.7mm dia aperture
25.4mm dia: 21.4mm dia aperture
50.8mm dia: 46.8mm dia aperture
| Name | CWL(nm) | Peak Transmission (%) | FWHM | Diameter (mm) | Thickness (mm) | Blocking Type | Avg. Blocking Range | Avg. Blocking OD | Price | Buy |
| 515FIN25 pdf | 514.5 | 55 | 3 | 25 | 6.1 | Silver | 200nm to 1150nm | 5 |
US$168.89
|
|
| 515DIN25 pdf | 514.5 | 55 | 3 | 25 | 6.1 | Dielectric | 200nm to 1150nm | 5 |
US$187.65
|
|
| 532DIN12 pdf | 532 | 60 | 3 | 12.5 | 6.1 | Dielectric | 200nm to 1150nm | 5 |
US$70.06
|
|
| 532DIN25 pdf | 532 | 60 | 3 | 25 | 6.1 | Dielectric | 200nm to 1150nm | 5 |
US$187.65
|
|
| 546DIN25 pdf | 546.1 | 60 | 3 | 25 | 6.1 | Dielectric | 200nm to 1150nm | 5 |
US$187.65
|
|
| 578DIN25 pdf | 577.7 | 60 | 3 | 25 | 6.1 | Dielectric | 200nm to 1150nm | 5 |
US$187.65
|
|
| 589DIN12 pdf | 589.6 | 60 | 3 | 12.5 | 6.1 | Dielectric | 200nm to 1150nm | 5 |
US$114.68
|
|
| 589DIN25 pdf | 589.6 | 60 | 3 | 25 | 6.1 | Dielectric | 200nm to 1150nm | 5 |
US$187.65
|
|
| 633DIN12 pdf | 632.8 | 60 | 3 | 12.5 | 6.1 | Dielectric | 200nm to 1150nm | 5 |
US$114.68
|
