| WGW5050 50 x 50 mm White Float Rectangular Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Soda Lime | Rectangular |
| WGW5051 50 x 50 mm White Float Rectangular Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Soda Lime | Rectangular |
| WGW6500 65 mm Dia. White Float Round Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Soda Lime | Circular |
| WBF2504 25 mm Dia. Barium Fluoride Round Window; t=4mm Uncoated | Optics | Window | Flat Window | Knight Optical | BAF2 | Circular |
| WMG2500 25 mm Dia. Magnesium Fluoride Round Window; t=1mm Uncoated | Optics | Window | Flat Window | Knight Optical | Magnesium Fluoride | Circular |
| WMG1302 13 mm Dia. Magnesium Fluoride Round Window; t=2mm Uncoated | Optics | Window | Flat Window | Knight Optical | Magnesium Fluoride | Circular |
| WKB4505 45 mm Dia. Potassium Bromide Round Window; t=5mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Circular |
| WNA3005 30mm Dia. Sodium Chloride Round Window; t=5mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Circular |
| WNA5005 50mm Dia. Sodium Chloride Round Window; t=5mm Uncoated | Optics | Window | Flat Window | Knight Optical | UVFS | Circular |
| WGW100100 100 x 100 mm White Float Rectangular Window; t=3mm Uncoated | Optics | Window | Flat Window | Knight Optical | Soda Lime | Rectangular |
| HMPQP-40C10-20 40 mm Dia. UVFS High Precision Round Optical Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPFL-15C02-P 15 mm Dia. Float Glass Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | Soda Lime | Circular |
| OPSQ-15S03-4-5 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S01-P 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-70S2.3-0.2-10 70 x 70 mm UVFS Square Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S01-P 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-40S06-1-5 40 x 40 mm UVFS Square Optical Parallel Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S05-10-5 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-40S04-1-5 40 x 40 mm UVFS Square Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S05-4-5 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S02-10-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S03-10-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S02-4-5 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-40S04-P 40 x 40 mm UVFS Square Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| HMPQP-30C10-12 30 mm Dia. UVFS High Precision Round Optical Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPQP-30C10-40 30 mm Dia. UVFS High Precision Round Optical Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPQP-80C15-12 80 mm Dia. UVFS High Precision Round Optical Flat Window; t=15 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPFL-30C01-P 30 mm Dia. Float Glass Round Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | Soda Lime | Circular |
| OPSQ-25S03-10-5 25 x 25 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S03-1-5 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-25S05-4-5 25 x 25 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S05-P 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-50S03-P 50 x 50 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-30S02-P 30 x 30 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-30S03-4-5 30 x 30 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S05-10-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-25S01-1-5 25 x 25 mm UVFS Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S02-P 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-25S02-P 25 x 25 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-50S05-10-5 50 x 50 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-50S05-P 50 x 50 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S05-4-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S05-1-5 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S2.3-1-10 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPB-10S01-10-5 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| HMPQP-50C10-6 50 mm Dia. UVFS High Precision Round Optical Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPQP-60C12-40 60 mm Dia. UVFS High Precision Round Optical Flat Window; t=12 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPZP-150C25-20 150 mm Dia. Low Expansion Glass (ULE) High Precision Round Optical Flat Window; t=25 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPZP-130C20-12 130 mm Dia. Low Expansion Glass (ULE) High Precision Round Optical Flat Window; t=20 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-20S05-P 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-25S02-1-5 25 x 25 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S01-4-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S02-20-2 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-50S08-10-5 50 x 50 mm UVFS Square Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-50S08-P 50 x 50 mm UVFS Square Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-40S02-P 40 x 40 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S03-10-5 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-40S06-10-5 40 x 40 mm UVFS Square Optical Parallel Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-50S08-4-5 50 x 50 mm UVFS Square Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S03-P 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S03-4-5 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| HMPQP-30C10-6 30 mm Dia. UVFS High Precision Round Optical Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPQP-50C10-40 50 mm Dia. UVFS High Precision Round Optical Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPQP-50C10-12 50 mm Dia. UVFS High Precision Round Optical Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPQP-100C20-12 100 mm Dia. UVFS High Precision Round Optical Flat Window; t=20 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPQP-60C12-20 60 mm Dia. UVFS High Precision Round Optical Flat Window; t=12 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPZP-100C17-12 100 mm Dia. Low Expansion Glass (ULE) High Precision Round Optical Flat Window; t=17 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPFL-30C02-P 30 mm Dia. Float Glass Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | Soda Lime | Circular |
| OPSQ-10S01-P 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-50S05-4-5 50 x 50 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S2.3-1-10 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S02-1-5 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S03-4-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-30S03-P 30 x 30 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S05-10-5 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-40S04-4-5 40 x 40 mm UVFS Square Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S02-10-5 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-50S05-1-5 50 x 50 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S03-10-5 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-30S05-1-5 30 x 30 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S05-4-5 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-127S2.3-0.1-10 126.6 x 126.6 mm UVFS Square Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S02-10-5 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S01-1-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-50S2.3-0.25-10 50 x 50 mm UVFS Square Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPB-30S05-10-5 30 x 30 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-30S05-P 30 x 30 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-10S05-P 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S04-4-5 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-25S03-4-5 25 x 25 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-10S01-4-5 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-15S05-1-5 15 x 15 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S05-4-5 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-15S01-1-5 15 x 15 mm N-BK7 Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S06-10-5 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-25S03-1-5 25 x 25 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S06-P 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S02-P 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFSQ-10S06-20 10 x 10 mm UVFS Square Precision Ground Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OFB-15S03-4 15 x 15 mm N-BK7 Square Precision Ground Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |