LONG WAVE PASS EDGE FILTERS
Long-wave pass (LWP) edge filters are engineered to transmit longer wavelengths while blocking shorter wavelengths. These filters are especially useful in fluorescence applications, where they serve as effective emission filters, and in photometry, where they excel as order sorting filters. Andover’s LWP filters feature a sharp transition between transmission and reflection, ensuring precise wavelength selection.
Built with robust first-surface dielectric coatings, our LWP filters withstand typical cleaning and handling, maintaining their integrity and performance. Standard LWP filters are available in 50nm increments from 300nm to 1000nm, with custom options available to meet specific requirements.
Contact our technical sales team for further details.
Built with robust first-surface dielectric coatings, our LWP filters withstand typical cleaning and handling, maintaining their integrity and performance. Standard LWP filters are available in 50nm increments from 300nm to 1000nm, with custom options available to meet specific requirements.
Contact our technical sales team for further details.
*HIGH VOLUME* - This product lends itself to being produced in large quantities at competitive pricing. Email info@andcorp.com or fill out a contact form for details.
For more demanding requirements, please see our steep-edge long pass filters.
| General Specifications | |
| Thickness: | 4.0mm maximum |
| Size Tolerance: | +0.0mm/-0.5mm |
| Min. Clear Aperture: | 95% of outside dimension |
| Substrate Material: | Glass (Note: BK-7 or Borofloat available as an option for higher Tx.) |
| Flatness: | 3-5 waves per 25 TWF |
| Surface Quality: | 80-50 per MIL-C-48497A |
| Humidity and Abrasion: | Per MIL-C-675A |
| Operating Temperature: | -50°C to +100°C |
| Cut-on Slope: | 6% maximum (11% for 300nm filter) |
| Cut-on Tolerance: | ±10nm from 400nm-1100nm ±5nm from 300nm - 375nm |
| Mechanical: | Unmounted |
| Transmission | |
| Long Wave Pass: | 85% average from the 50% cut-on point to 2000nm |
| Short Wave Pass: |
400-450nm: 85% avererage from the 50% cut-on point to 0.75 x the 50% cut-off point 500-1000nm: 85% avererage from the 50% cut-on point to 0.75 x the 50% cut-off point Note: with the exception of the 400nm filter, all SWP filters will drop off in transmission at wavelengths under 400nm.) |
| Rejection | |
| Long Wave Pass: | 99% or greater from 0.9 x the 50% point to the UV |
| Short Wave Pass: | 99% or greater from 1.07 x the 50% point to 1.25 x the 50% point |
| Effective index of refraction (n*) | 1.7 (approximately) |
PART NO.
DESCRIPTION
1 - 5 pcs.
6 - 10 pcs.
> 10 pcs.
Stock Status
Buy
Available Items
