| WZN1010 10 x 10 mm Zinc Sulphide Multispectral (clear) Rectangular Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnS | Rectangular |
| WZN7003 70 mm Dia. Zinc Selenide Standard Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN4002 40 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN3802 38 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN3515 35 mm Dia. Zinc Selenide Standard Round Window; t=1.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN3200 32 mm Dia. Zinc Selenide Standard Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN3002 30 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN2550 25.4 mm Dia. Zinc Sulphide FLIR Round Window; t=5mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnS | Circular |
| WZN2604 25.4 mm Dia. Zinc Selenide Standard Round Window; t=4mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN2601 25.4 mm Dia. Zinc Selenide Standard Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN2540 25 mm Dia. Zinc Selenide Standard Round Window; t=4mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN2530 25 mm Dia. Zinc Selenide Standard Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN2501 25 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN2500 25 mm Dia. Zinc Selenide Standard Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN2205 22 mm Dia. Zinc Selenide Standard Round Window; t=0.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN2005 20 mm Dia. Zinc Selenide Standard Round Window; t=5mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN2002 20 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN2000 20 mm Dia. Zinc Selenide Standard Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN1802 18 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN1801 18 mm Dia. Zinc Selenide Standard Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN1605 16 mm Dia. Zinc Selenide Standard Round Window; t=0.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN1502 15 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN1312 13 mm Dia. Zinc Sulphide Multispectral (clear) Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnS | Circular |
| WZN1301 13 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN1311 13 mm Dia. Zinc Sulphide Multispectral (clear) Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnS | Circular |
| WZN1310 13 mm Dia. Zinc Selenide Standard Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN1302 12.7 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN1300 12 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN1211 12 mm Dia. Zinc Sulphide Multispectral (clear) Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnS | Circular |
| WZN1201 12 mm Dia. Zinc Selenide Standard Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WZN1011 10 mm Dia. Zinc Sulphide Multispectral (clear) Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnS | Circular |
| WZN0902 9 mm Dia. Zinc Selenide Standard Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | ZnSe | Circular |
| WQZ5002 50 mm Dia. Quartz Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQK1000 10 mm Dia. N-BK7 Precision Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | N-BK7 | Circular |
| WHQ1600 16 mm Dia. Quartz Round Window; t=1.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WHF1000 10 mm Dia. UVFS Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Circular |
| WHF1500 15 mm Dia. UVFS Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Circular |
| WHF4011 40 mm Dia. UVFS Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Circular |
| WHF5053 50 x 50 mm UVFS Rectangular Window; t=2.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Rectangular |
| WHF7500 75 mm Dia. UVFS Round Window; t=6mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Circular |
| WHF1410 10 mm Dia. UVFS Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Circular |
| WQF1500 15 mm Dia. Quartz Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQF4000 40 mm Dia. Quartz Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQF7500 75 mm Dia. Quartz Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQF5000 50 mm Dia. Quartz Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WSI2501 25.4 mm Dia. Silicon Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Silicon | Circular |
| WSI2301 25.4 mm Dia. Silicon Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Silicon | Circular |
| WSI3003 30 mm Dia. Silicon Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Silicon | Circular |
| WSI3002 30 mm Dia. Silicon Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Silicon | Circular |
| WSI1005 10 mm Dia. Silicon Round Window; t=0.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | Silicon | Circular |
| WSI5003 50 mm Dia. Silicon Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Silicon | Circular |
| WSI2502 25 mm Dia. Silicon Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Silicon | Circular |
| WQZ1202 12 mm Dia. Z-Cut Quartz Right Handed Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ15002 15 mm Dia. Z-Cut Quartz Left Handed Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ1502 15 mm Dia. Z-Cut Quartz Right Handed Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ2005 20 mm Dia. Z-Cut Quartz Right Handed Round Window; t=0.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ20001 20 mm Dia. Z-Cut Quartz Left Handed Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ25001 25 mm Dia. Z-Cut Quartz Left Handed Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ25002 25 mm Dia. Z-Cut Quartz Left Handed Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ2525 25 mm Dia. Z-Cut Quartz Right Handed Round Window; t=2.5mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ3203 32 mm Dia. Z-Cut Quartz Right Handed Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ35001 35 mm Dia. Z-Cut Quartz Left Handed Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ3501 35 mm Dia. Z-Cut Quartz Right Handed Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ4002 40 mm Dia. Z-Cut Quartz Right Handed Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WQZ5008 50.8 mm Dia. Z-Cut Quartz Right Handed Round Window; t=5mm Uncoated | Optics | Window | Flat Window | Knight Optical | Quartz | Circular |
| WGE3200 32 mm Dia. Germanium Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| WGE2502 25.4 mm Dia. Germanium Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Germanium | Circular |
| 32-946 5 mm Dia. B270 Glass Protective Flat Window; t=1 mm MgF2 400-700nm | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 45-636 10 mm Dia. B270 Glass Protective Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 45-637 12.5 mm Dia. B270 Glass Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 32-948 12.5 mm Dia. B270 Glass Protective Flat Window; t=2 mm MgF2 400-700nm | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 45-639 20 mm Dia. B270 Glass Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 32-950 20 mm Dia. B270 Glass Protective Flat Window; t=2 mm MgF2 400-700nm | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 45-640 25 mm Dia. B270 Glass Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 45-254 30 mm Dia. B270 Glass Protective Flat Window; t=2 mm MgF2 400-700nm | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 45-642 35 mm Dia. B270 Glass Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 45-571 40 mm Dia. B270 Glass Protective Flat Window; t=3 mm MgF2 400-700nm | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 45-644 50 mm Dia. B270 Glass Protective Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 48-414 75 mm Dia. B270 Glass Protective Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Circular |
| 64-083 5.0 x 5.0 mm B270 Glass Protective Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Rectangular |
| 64-084 10.0 x 10.0 mm B270 Glass Protective Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Rectangular |
| 64-085 12.5 x 12.5 mm B270 Glass Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Rectangular |
| 45-182 12.5 x 12.5 mm B270 Glass Protective Flat Window; t=2 mm MgF2 400-700nm | Optics | Window | Flat Window | Edmund Optics | B270 | Rectangular |
| 64-086 15.0 x 15.0 mm B270 Glass Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Rectangular |
| 64-087 20.0 x 20.0 mm B270 Glass Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Rectangular |
| 48-538 25.0 x 25.0 mm B270 Glass Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Rectangular |
| 45-183 25.0 x 25.0 mm B270 Glass Protective Flat Window; t=2 mm MgF2 400-700nm | Optics | Window | Flat Window | Edmund Optics | B270 | Rectangular |
| 48-415 75.0 x 75.0 mm B270 Glass Protective Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | B270 | Rectangular |
| 68-813 13 mm Dia. Sodium Chloride Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | UVFS | Circular |
| WGT1004-AI2 10 mm Dia. B270 Glass Round Window; t=4mm AR 1050-1700nm | Optics | Window | Flat Window | Knight Optical | B270 | Circular |
| WGT2503-AI2 25 mm Dia. B270 Glass Round Window; t=3mm AR 1050-1700nm | Optics | Window | Flat Window | Knight Optical | B270 | Circular |
| WGT2525-AI2 25 x 25 mm B270 Glass Rectangular Window; t=1mm AR 1050-1700nm | Optics | Window | Flat Window | Knight Optical | B270 | Rectangular |
| WGT5000-AI2 50 mm Dia. B270 Glass Round Window; t=1mm AR 1050-1700nm | Optics | Window | Flat Window | Knight Optical | B270 | Circular |
| WGT5003-AI2 50 mm Dia. B270 Glass Round Window; t=3mm AR 1050-1700nm | Optics | Window | Flat Window | Knight Optical | B270 | Circular |
| WGT5004-AI2 50 mm Dia. B270 Glass Round Window; t=4mm AR 1050-1700nm | Optics | Window | Flat Window | Knight Optical | B270 | Circular |
| WGT5054-AI2 50 x 50 mm B270 Glass Rectangular Window; t=4mm AR 1050-1700nm | Optics | Window | Flat Window | Knight Optical | B270 | Rectangular |
| WG71050-D 1in Dia. AR Coated; ZnSe Broadband Precision Window; t=5 mm 1650-3000nm | Optics | Window | Flat Window | Thorlabs | ZnSe | Circular |
| WG71050-E2 1in Dia. AR Coated; ZnSe Broadband Precision Window; t=5 mm 4.5-7.5µm | Optics | Window | Flat Window | Thorlabs | ZnSe | Circular |
| WG70530-G 0.5in Dia. AR Coated; ZnSe Broadband Precision Window; t=3 mm 7-12µm | Optics | Window | Flat Window | Thorlabs | ZnSe | Circular |
| WG80530-E 0.5in Dia. AR Coated; Silicon Broadband Precision Window; t=3 mm 3-5µm | Optics | Window | Flat Window | Thorlabs | Silicon | Circular |