STEEP-EDGE LONGPASS FILTERS
Our steep-edge long pass filters employ magnetron sputtered hard oxide coatings to yield deep rejection and a sharp transition to very high transmission. The coatings are deposited on precision polished Fused Silica substrates, and do not employ any absorbing filter glasses, making them suitable for high-temperature applications. They are offered in three standard sizes, with custom sizes available on request. For less-demanding applications, please see our standard edge filters.
BENEFITS
Provide very steep (≤1%) cut-on slopes
Suitable for high-temperature applications
Can be cut or machined to smaller sizes
Useful for redirecting a particular band of light
COMMON APPLICATIONS
Fluorescence
Photometry
Color enhancement and combining laser studies
| General Specifications | |
| Thickness: | 1.5 ± .25mm |
| Size Tolerance: | +0.0mm/-0.2mm |
| Min. Clear Aperture: | 95% of outside dimension |
| Substrate Material: | UV Grade Fused Silica |
| Flatness: | ≤ 1/4 wave/inch TWF |
| Surface Quality: | 60-40 per MIL-C-48497A |
| Humidity and Abrasion: | Per MIL-C-675A |
| Durability: | Per MIL-C-48497A |
| Operating Temperature: | -50°C to +200°C |
| Transmission: | ≥ 91% average |
| Rejection: | ≥ OD 4.0 |
| Cut-on Slope: | 1% (2% for 325nm filter) |
| Cut-on Tolerance: | ± 1% |
| Effective Refractive Index | 1.76 |
| Mechanical: | Unmounted |
PART NO.
DESCRIPTION
1 - 5 pcs.
6 - 10 pcs.
> 10 pcs.
Stock Status
Buy
Available Items
