| CAW4025-3 25.4 mm Dia. CaF2 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Union Optic | CaF2 | Circular |
| CAW4020-5 20 mm Dia. CaF2 Round Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | Union Optic | CaF2 | Circular |
| CAW4012-3 12.7 mm Dia. CaF2 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Union Optic | CaF2 | Circular |
| CAW4012-1 12.7 mm Dia. CaF2 Round Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | Union Optic | CaF2 | Circular |
| 4002010220 50.8 mm Dia. UVFS Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| 4002010217 20 mm Dia. UVFS Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| 4002010213 50.8 mm Dia. UVFS Round Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| 4002010212 20 mm Dia. N-BK7 Round Flat Window; t=6.35 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 4002010140 15 mm Dia. N-BK7 Round Flat Window; t=1.04 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 4002010101 16 mm Dia. N-BK7 Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 4002010100 38.1 mm Dia. N-BK7 Round Flat Window; t=6.35 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 4002010073 25.4 mm Dia. N-BK7 Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 4002010034 20 mm Dia. N-BK7 Round Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 4002010028 25.4 mm Dia. N-BK7 Round Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 4002010026 12.7 mm Dia. N-BK7 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 4002010020 25 mm Dia. N-BK7 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 4002010007 20 mm Dia. N-BK7 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 4002010002 50.8 mm Dia. N-BK7 Round Flat Window; t=6.35 mm Uncoated | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 3005011334 20 mm Dia. UVFS Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| 3005010688 25 mm Dia. UVFS Round Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| 3005010444 87.5 mm Dia. UVFS Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| 3005010432 25.4 mm Dia. UVFS Round Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| 3005010033 43 mm Dia. UVFS Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| 4002010207 155 mm Dia. B270 Glass Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Union Optic | B270 | Circular |
| 3005011658 12.7 mm Dia. HPFS 7980 Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Union Optic | HPFS7980 | Circular |
| 3005011080 25.4 mm Dia. HPFS 7980 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Union Optic | HPFS7980 | Circular |
| ARW1050-5 50.8 mm Dia. UVFS Round AR coated Flat Window; t=6.35mm 515-532nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| ARW1050-3 50.8 mm Dia. UVFS Round AR coated Flat Window; t=6.35mm 351-355nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| ARW1025-5 25.4 mm Dia. UVFS Round AR coated Flat Window; t=6.35mm 515-532nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| ARW1025-3 25.4 mm Dia. UVFS Round AR coated Flat Window; t=6.35mm 351-355nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| ARW1025-2 25.4 mm Dia. UVFS Round AR coated Flat Window; t=6.35mm 260-270nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| ARW1025-1 25.4 mm Dia. UVFS Round AR coated Flat Window; t=6.35mm 1028-1064nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| ARW1012-5 12.7 mm Dia. UVFS Round AR coated Flat Window; t=3mm 515-532nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| ARW1012-1 12.7 mm Dia. UVFS Round AR coated Flat Window; t=3mm 1028-1064nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| ARW0050-4B 50.8 mm Dia. N-BK7 Round AR coated Flat Window; t=6.35mm 400-700nm | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| ARW0025-7 25.4 mm Dia. N-BK7 Round AR coated Flat Window; t=6.35mm 780-810nm | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| ARW0025-6B 25.4 mm Dia. N-BK7 Round AR coated Flat Window; t=6.35mm 650-1100nm | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| ARW0025-6 25.4 mm Dia. N-BK7 Round AR coated Flat Window; t=6.35mm 630-650nm | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| ARW0025-1 25.4 mm Dia. N-BK7 Round AR coated Flat Window; t=6.35mm 1028-1064nm | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| ARW0012-7 12.7 mm Dia. N-BK7 Round AR coated Flat Window; t=3mm 780-810nm | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| ARW0012-6B 12.7 mm Dia. N-BK7 Round AR coated Flat Window; t=3mm 650-1100nm | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| ARW0012-51 12.7 mm Dia. N-BK7 Round AR coated Flat Window; t=3mm 515-532/1028-1070nm | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 3005012056 20 mm Dia. N-BK7 Round AR coated Flat Window; t=2mm 515-532nm | Optics | Window | Flat Window | Union Optic | N-BK7 | Circular |
| 3005011591 20 mm Dia. UVFS Round AR coated Flat Window; t=3mm 351-355nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| 3005011185 30 mm Dia. UVFS Round AR coated Flat Window; t=3mm 515-532nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| LPW1138-3 38.1 mm Dia. UVFS Round AR coated Laser Protection Flat Window; t=3mm 1028-1080nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| LPW1130-6 30 mm Dia. UVFS Round AR coated Laser Protection Flat Window; t=6mm 1028-1080nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| LPW1130-3 30 mm Dia. UVFS Round AR coated Laser Protection Flat Window; t=3mm 1028-1080nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| LPW1121-2 21.5 mm Dia. UVFS Round AR coated Laser Protection Flat Window; t=2mm 1028-1080nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| LPW1120-1 20 mm Dia. UVFS Round AR coated Laser Protection Flat Window; t=1mm 1028-1080nm | Optics | Window | Flat Window | Union Optic | UVFS | Circular |
| 3005010165 30 mm Dia. UVFS Round AR coated Laser Protection Flat Window; t=5mm 1064nm | Optics | Window | Flat Window | Union Optic | UVFS | 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 |