金屬塗(tu)覆(fu)的紅外中(zhong)性密度濾光(guang)片（IR ND濾光(guang)片）從由(you)感(gan)興趣(qu)的(de)波長區(qu)域確(que)定的(de)基板(ban)上的(de)金(jin)屬合金(jin)塗(tu)層獲(huo)得其光(guang)密度。與(yu)全(quan)電(dian)介質或吸收型(xing)不(bu)同(tong)，金屬型(xing)ND濾光(guang)器采(cai)用吸收和反射(she)的(de)組(zu)合來(lai)降低(di)光(guang)強(qiang)度。
Andover的(de)IR ND濾光(guang)片具有(you)出色(se)的光(guang)譜(pu)中(zhong)性，優(you)於(yu)市場上的(de)所有其他濾光(guang)片。
▪ 在(zai)寬(kuan)光(guang)譜(pu)範圍(wei)內(nei)提(ti)供更大線(xian)性(xing)度的(de)衰(shuai)減(jian)
▪ 提(ti)供ZY的(de)耐(nai)用(yong)性(xing)
▪ 提(ti)供定(ding)制(zhi)基材(cai)
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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