Andover Corporation
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| Brand | Andover Corporation |
|---|---|
| Origin | USA |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Import Status | Imported |
| Pricing | Available upon Request |
| Substrate | BK7 or Borofloat® (optional) |
| Thickness | ≤4.0 mm |
| Clear Aperture | ≥85% of outer dimension |
| Surface Quality | 80–50 per MIL-C-48497A |
| Flatness | 3–5 waves @ 25 mm (TWFS) |
| Operating Temperature | −50 °C to +200 °C |
| Humidity & Abrasion Resistance | Compliant with MIL-C-675C |
| Cut-on Slope (LWP) | ≤6% (≤11% for 300 nm filter) |
| Cut-on Tolerance | ±10 nm (400–1100 nm), ±5 nm (300–375 nm) |
| Avg. Transmission (LWP) | ≥85% from 50% cut-on point to 2000 nm |
| Blocking (LWP) | ≥99% from 0.9× cut-on to UV |
| Effective Refractive Index (n*) | ~1.7 |
| Wavelength Range | 300–1000 nm (50 nm increments standard) |
| Edge Steepness | Significantly steeper than colored-glass filters |