| 530-6121 12 mm Dia. IR grade CaF2 Window; t=1 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | CaF2 | Circular |
| 540-7252 25.4 mm Dia. Barium Fluoride Window; t=2 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | BAF2 | Circular |
| 550-7120 12.7 mm Dia. Sapphire Window; t=0.5 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Al2O3 | Circular |
| 550-7122 12.7 mm Dia. Sapphire Window; t=2 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Al2O3 | Circular |
| 550-7255 25.4 mm Dia. Sapphire Window; t=5 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Al2O3 | Circular |
| 560-6251 25.4 mm Dia. Zinc Selenide Window; t=3 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | ZnSe | Circular |
| 560-6381 38.1 mm Dia. Zinc Selenide Window; t=3 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | ZnSe | Circular |
| 580-6055 50.8 mm Dia. Germanium Window; t=5.0 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Germanium | Circular |
| WQK1010 10 x 10 mm N-BK7 Precision Rectangular Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | N-BK7 | Rectangular |
| WQK6500 65 mm Dia. N-BK7 Precision Round Window; t=8mm Uncoated | Optics | Window | Flat Window | Knight Optical | N-BK7 | Circular |
| WQK1515 15 x 15 mm N-BK7 Precision Rectangular Window; t=4mm Uncoated | Optics | Window | Flat Window | Knight Optical | N-BK7 | Rectangular |
| WQK7575 75 x 75 mm N-BK7 Precision Rectangular Window; t=8mm Uncoated | Optics | Window | Flat Window | Knight Optical | N-BK7 | Rectangular |
| WGP2500 25 mm Dia. Schott Borofloat 33 Round Window; t=1.1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Borofloat33 | Circular |
| WGP5000 50 mm Dia. Schott Borofloat 33 Round Window; t=1.1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Borofloat33 | Circular |
| WGP5011 50 mm Dia. Schott Borofloat 33 Round Window; t=3.3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Borofloat33 | Circular |
| WGE2504 25 mm Dia. Germanium Round Window; t=4mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WGE1803 18 mm Dia. Germanium Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WGE2523 23.5 x 25 mm Germanium Rectangular Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Rectangular |
| WHS1300 12.5 mm Dia. Sapphire Random Cut Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WHS0500 5 mm Dia. Sapphire Random Cut Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WSC1301 12.5 mm Dia. C-Cut Sapphire Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WSC4002 40 mm Dia. C-Cut Sapphire Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WBF2506 25.4 mm Dia. Barium Fluoride Round Window; t=6mm Uncoated | Optics | Window | Flat Window | Knight Optical | BAF2 | Circular |
| WBF2502 25.4 mm Dia. Barium Fluoride Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | BAF2 | Circular |
| WBF1010 10 x 10 mm Barium Fluoride Rectangular Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | BAF2 | Rectangular |
| 220-0206E 25.4 mm Dia. N-BK7 Precision Round Window; t=6 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 220-0566E 50.8 mm Dia. N-BK7 Precision Round Window; t=6 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 550-7123 12.7 mm Dia. Sapphire Window; t=3 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Al2O3 | Circular |
| 550-7251 25.4 mm Dia. Sapphire Window; t=1 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Al2O3 | Circular |
| 560-6250 25.4 mm Dia. Zinc Selenide Window; t=2 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | ZnSe | Circular |
| 560-6503 50.8 mm Dia. Zinc Selenide Window; t=5 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | ZnSe | Circular |
| WQK4040 40 x 40 mm N-BK7 Precision Rectangular Window; t=6mm Uncoated | Optics | Window | Flat Window | Knight Optical | N-BK7 | Rectangular |
| WQK5050 50 x 50 mm N-BK7 Precision Rectangular Window; t=8mm Uncoated | Optics | Window | Flat Window | Knight Optical | N-BK7 | Rectangular |
| WGP5051 50 x 50 mm Schott Borofloat 33 Rectangular Window; t=3.3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Borofloat33 | Rectangular |
| WHP1000 10 mm Dia. Schott Borofloat 33 Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Borofloat33 | Circular |
| WHP2500 25 mm Dia. Schott Borofloat 33 Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Borofloat33 | Circular |
| WHP2511 25 mm Dia. Schott Borofloat 33 Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Borofloat33 | Circular |
| WGE3001 30 mm Dia. Germanium Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WGE2911 11.7 x 29.5 mm Germanium Rectangular Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Rectangular |
| WGE3002 30 mm Dia. Germanium Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WGE1005 10 mm Dia. Germanium Round Window; t=0.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WGE1902 19 mm Dia. Germanium Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WHS1600 16 mm Dia. Sapphire Random Cut Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WHS3000 30 mm Dia. Sapphire Random Cut Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WHS4000 40 mm Dia. Sapphire Random Cut Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WHS5033 50 mm Dia. Sapphire Random Cut Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WBF2500 25 mm Dia. Barium Fluoride Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | BAF2 | Circular |
| WBF2201 22 mm Dia. Barium Fluoride Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | BAF2 | Circular |
| 220-0403E 38.1 mm Dia. N-BK7 Precision Round Window; t=10 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 220-0503M 50.0 mm Dia. N-BK7 Precision Round Window; t=12 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 220-0166E 12.7 mm Dia. N-BK7 Precision Round Window; t=6 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 220-0236E 25.4 mm Dia. N-BK7 Precision Round Window; t=3 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 220-0586E 50.8 mm Dia. N-BK7 Precision Round Window; t=8 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 220-0586M 50.0 mm Dia. N-BK7 Precision Round Window; t=8 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 520-6385 38.1 mm Dia. Magnesium Fluoride Window; t=5 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Magnesium Fluoride | Circular |
| 530-5506 50.8 mm Dia. UV grade CaF2 Window; t=6 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | CaF2 | Circular |
| 550-7124 12.7 mm Dia. Sapphire Window; t=4 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Al2O3 | Circular |
| 550-7200 20.0 mm Dia. Sapphire Window; t=0.5 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Al2O3 | Circular |
| 550-7201 20.0 mm Dia. Sapphire Window; t=1 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Al2O3 | Circular |
| 560-6120 12.7 mm Dia. Zinc Selenide Window; t=2 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | ZnSe | Circular |
| 560-6121 12.7 mm Dia. Zinc Selenide Window; t=3 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | ZnSe | Circular |
| WQK1500 15 mm Dia. N-BK7 Precision Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | N-BK7 | Circular |
| WQK2525 25 x 25 mm N-BK7 Precision Rectangular Window; t=6mm Uncoated | Optics | Window | Flat Window | Knight Optical | N-BK7 | Rectangular |
| WQK7500 75 mm Dia. N-BK7 Precision Round Window; t=8mm Uncoated | Optics | Window | Flat Window | Knight Optical | N-BK7 | Circular |
| WHP1500 15 mm Dia. Schott Borofloat 33 Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Borofloat33 | Circular |
| WHP4000 40 mm Dia. Schott Borofloat 33 Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Borofloat33 | Circular |
| WHP5050 50 x 50 mm Schott Borofloat 33 Rectangular Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Borofloat33 | Rectangular |
| WGE1202 12 mm Dia. Germanium Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WHS1000 10 mm Dia. Sapphire Random Cut Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WHS1500 15 mm Dia. Sapphire Random Cut Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WHS5011 50 mm Dia. Sapphire Random Cut Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WHS5055 50 mm Dia. Sapphire Random Cut Round Window; t=5mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WSC1002 10 mm Dia. C-Cut Sapphire Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| 220-0466E 38.1 mm Dia. N-BK7 Precision Round Window; t=6 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 220-0566M 50.0 mm Dia. N-BK7 Precision Round Window; t=6 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 220-0786M 75.0 mm Dia. N-BK7 Precision Round Window; t=8 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | N-BK7 | Circular |
| 520-5253 25.4 mm Dia. Magnesium Fluoride Window; t=3 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Magnesium Fluoride | Circular |
| 520-6253 25.4 mm Dia. Magnesium Fluoride Window; t=3 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Magnesium Fluoride | Circular |
| 520-6506 50.8 mm Dia. Magnesium Fluoride Window; t=6 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | Magnesium Fluoride | Circular |
| 530-5253 25.4 mm Dia. UV grade CaF2 Window; t=3 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | CaF2 | Circular |
| 530-6756 70 mm Dia. IR grade CaF2 Window; t=6 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | CaF2 | Circular |
| 510-5506 50.8 mm Dia. UV grade Lithium Fluoride Window; t=6 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | LiF | Circular |
| 540-7445 44.6 mm Dia. Barium Fluoride Window; t=3.5 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | BAF2 | Circular |
| 540-7503 50.8 mm Dia. Barium Fluoride Window; t=3 mm Uncoated | Optics | Window | Flat Window | EKSMA Optics | BAF2 | Circular |
| WGE2501 25 mm Dia. Germanium Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WGE1000 10 mm Dia. Germanium Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WGE2522 25.4 mm Dia. Germanium Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WHS2533 25 mm Dia. Sapphire Random Cut Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WHS2700 27 mm Dia. Sapphire Random Cut Round Window; t=2.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WHS2502 25 mm Dia. Sapphire Random Cut Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WSC1001 10 mm Dia. C-Cut Sapphire Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WSC1302 12.5 mm Dia. C-Cut Sapphire Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WSC5002 50 mm Dia. C-Cut Sapphire Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Al2O3 | Circular |
| WBF1301 13 mm Dia. Barium Fluoride Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | BAF2 | Circular |
| WBF1605 16 mm Dia. Barium Fluoride Round Window; t=0.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | BAF2 | Circular |
| WBF1616 16 x 16 mm Barium Fluoride Rectangular Window; t=1.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | BAF2 | Rectangular |
| WMG2504 25 mm Dia. Magnesium Fluoride Round Window; t=5mm Uncoated | Optics | Window | Flat Window | Knight Optical | Magnesium Fluoride | Circular |
| WMG2001 20 mm Dia. Magnesium Fluoride Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Magnesium Fluoride | Circular |
| WKB2505 25 mm Dia. Potassium Bromide Round Window; t=5mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Circular |
| WKB5005 50 mm Dia. Potassium Bromide Round Window; t=5mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Circular |