金屬涂覆的紅外中性密度濾光片（IR ND濾光片）從由感興趣的波長(zhǎng)區(qū)域確定的基板上的金屬合金涂層獲得其光密度。與全電介質(zhì)或吸收型不同，金屬型ND濾光器采用吸收和反射的組合來(lái)降低光強(qiáng)度。
Andover的IR ND濾光片具有出色的光譜中性，優(yōu)于市場(chǎng)上的所有其他濾光片。
? 在寬光譜范圍內(nèi)提供更大線性度的衰減
? 提供ZY的耐用性
? 提供定制基材
General Specifications:
| Dimensional Tolerances: | ±0.2mm |
| Thickness: | 1.0mm |
| Min. Clear Aperture: | 90% of outside dimension |
| Surface Quality: | 80/50 per MIL-O-13830B |
| Coating Quality: | 80/50 per MIL-O-13830B |
| Coating Adherence: | Per MIL-M-13508C |
| Humidity: | Per MIL-STD-810F |
| Substrate Material: | Germanium |
| Flatness: | 3–5 waves per 25mm |
| Parallelism: | 10 arc minutes or better |
| Mechanical: | Unmounted |
| NO. | PART NO. | PART NO. |
| 1 | IR ND, 0.30 OD, 12.5 mm diameter | 030FNIR-12.5 |
| 2 | IR ND, 0.30 OD, 25.0 mm diameter | 030FNIR-25 |
| 3 | IR ND, 0.30 OD, 50.0 mm diameter | 030FNIR-50 |
| 4 | IR ND, 0.30 OD, 25.0 mm diameter | 030FNIR-BBAR-25 |
| 5 | IR ND, 0.50 OD, 12.5 mm diameter | 050FNIR-12.5 |
| 6 | IR ND, 0.50 OD, 25.0 mm diameter | 050FNIR-25 |
| 7 | IR ND, 0.50 OD, 50.0 mm diameter | 050FNIR-50 |
| 8 | IR ND, 0.50 OD, 25.0 mm diameter | 050FNIR-BBAR-25 |
| 9 | IR ND, 0.60 OD, 12.5 mm diameter | 060FNIR-12.5 |
| 10 | IR ND, 0.60 OD, 25.0 mm diameter | 060FNIR-25 |
| 11 | IR ND, 0.60 OD, 50.0 mm diameter | 060FNIR-50 |
| 12 | IR ND, 0.70 OD, 12.5 mm diameter | 070FNIR-12.5 |
| 13 | IR ND, 0.70 OD, 25.0 mm diameter | 070FNIR-25 |
| 14 | IR ND, 0.70 OD, 50.0 mm diameter | 070FNIR-50 |
| 15 | IR ND, 0.80 OD, 12.5 mm diameter | 080FNIR-12.5 |
| 16 | IR ND, 0.80 OD, 25.0 mm diameter | 080FNIR-25 |
| 17 | IR ND, 0.80 OD, 50.0 mm diameter | 080FNIR-50 |
| 18 | IR ND, 0.9 OD, 12.5 mm diameter | 090FNIR-12.5 |
| 19 | IR ND, 0.9 OD, 25.0 mm diameter | 090FNIR-25 |
| 20 | IR ND, 0.9 OD, 50.0 mm diameter | 090FNIR-50 |
| 21 | IR ND, 1.0 OD, 12.5 mm diameter | 100FNIR-12.5 |
| 22 | IR ND, 1.0 OD, 25.0 mm diameter | 100FNIR-25 |
| 23 | IR ND, 1.0 OD, 50.0 mm diameter | 100FNIR-50 |
| 24 | IR ND, 1.0 OD, 25.0 mm diameter | 100FNIR-BBAR-25 |
| 25 | IR ND, 1.3 OD, 12.5 mm diameter | 130FNIR-12.5 |
| 26 | IR ND, 1.3 OD, 25.0 mm diameter | 130FNIR-25 |
| 27 | IR ND, 1.3 OD, 50.0 mm diameter | 130FNIR-50 |
| 28 | IR ND, 1.5 OD, 12.5 mm diameter | 150FNIR-12.5 |
| 29 | IR ND, 1.5 OD, 25.0 mm diameter | 150FNIR-25 |
| 30 | IR ND, 1.5 OD, 50.0 mm diameter | 150FNIR-50 |
| 31 | IR ND, 2.0 OD, 12.5 mm diameter | 200FNIR-12.5 |
| 32 | IR ND, 2.0 OD, 25.0 mm diameter | 200FNIR-25 |
| 33 | IR ND, 2.0 OD, 50.0 mm diameter | 200FNIR-50 |
| 34 | IR ND, 2.0 OD, 25.0 mm diameter | 200FNIR-BBAR-25 |
| 35 | IR ND, 2.5 OD, 12.5 mm diameter | 250FNIR-12.5 |
| 36 | IR ND, 2.5 OD, 25.0 mm diameter | 250FNIR-25 |
| 37 | IR ND, 2.5 OD, 50.0 mm diameter | 250FNIR-50 |
| 38 | IR ND, 3.0 OD, 12.5 mm diameter | 300FNIR-12.5 |
| 39 | IR ND, 3.0 OD, 25.0 mm diameter | 300FNIR-25 |
| 40 | IR ND, 3.0 OD, 50.0 mm diameter | 300FNIR-50 |
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