| OPSQ-10S05-1-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-50S02-P 50 x 50 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S02-1-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S03-20-2 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S02-P 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-60S2.3-0.25-10 60 x 60 mm UVFS Square Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S05-20-2 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-100S2.3-0.1-10 100 x 100 mm UVFS Square Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S01-1-5 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-40S2.3-0.25-10 40 x 40 mm UVFS Square Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-40S04-10-5 40 x 40 mm UVFS Square Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPB-50S03-P 50 x 50 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| HMPQP-130C25-40 130 mm Dia. UVFS High Precision Round Optical Flat Window; t=25 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPQP-80C15-40 80 mm Dia. UVFS High Precision Round Optical Flat Window; t=15 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPQP-150C30-40 150 mm Dia. UVFS High Precision Round Optical Flat Window; t=30 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPQP-130C25-20 130 mm Dia. UVFS High Precision Round Optical Flat Window; t=25 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| HMPZP-130C20-20 130 mm Dia. Low Expansion Glass (ULE) High Precision Round Optical Flat Window; t=20 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPFL-15C01-P 15 mm Dia. Float Glass Round Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | Soda Lime | Circular |
| OPSQ-10S02-4-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S03-1-5 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-40S02-1-5 40 x 40 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S02-1-5 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-15S03-20-2 15 x 15 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S03-1-5 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S03-P 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-10S05-P 10 x 10 mm UVFS Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-40S03-P 40 x 40 mm UVFS Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPB-10S02-4-5 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-10S03-20-2 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-10S03-1-5 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-10S05-10-5 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-15S05-20-2 15 x 15 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-50S05-P 50 x 50 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S03-P 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S04-1-5 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-15S02-4-5 15 x 15 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-25S05-P 25 x 25 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S05-20-2 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-10S05-1-5 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-25S03-P 25 x 25 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFSQ-15S06-20 15 x 15 mm UVFS Square Precision Ground Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OFB-15S05-10 15 x 15 mm N-BK7 Square Precision Ground Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-25S05-1 25 x 25 mm N-BK7 Square Precision Ground Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-25S05-20 25 x 25 mm N-BK7 Square Precision Ground Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPSQ-30S01-P 30 x 30 mm UVFS Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S02-4-5 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-20S2.3-1-10 20 x 20 mm UVFS Square Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPSQ-25S01-P 25 x 25 mm UVFS Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Rectangular |
| OPB-15S03-P 15 x 15 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-25S05-4-5 25 x 25 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S01-1-5 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-30S03-1-5 30 x 30 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S03-1-5 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S03-1-5 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-50S05-10-5 50 x 50 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-30S03-10-5 30 x 30 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-30S03-P 30 x 30 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-10S03-10-5 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-25S02-P 25 x 25 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S05-1-5 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S04-10-5 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S04-P 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-15S03-10-5 15 x 15 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-50S02-1-5 50 x 50 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-25S05-10 25 x 25 mm N-BK7 Square Precision Ground Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-30S05-1 30 x 30 mm N-BK7 Square Precision Ground Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-50S05-1-5 50 x 50 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-30S02-P 30 x 30 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S02-4-5 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S06-20-2 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-10S02-20-2 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-50S08-4-5 50 x 50 mm N-BK7 Square Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S03-10-5 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-25S05-10-5 25 x 25 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-15S05-10-5 15 x 15 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-50S05-4-5 50 x 50 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-50S08-20-2 50 x 50 mm N-BK7 Square Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S02-10-5 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-30S05-20-2 30 x 30 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-30S05-20 30 x 30 mm N-BK7 Square Precision Ground Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-30S05-4 30 x 30 mm N-BK7 Square Precision Ground Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S03-20-2 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-15S03-4-5 15 x 15 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-10S02-1-5 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S02-1-5 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S03-P 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-20S03-4-5 20 x 20 mm N-BK7 Square Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-30S05-1-5 30 x 30 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-10S05-20-2 10 x 10 mm N-BK7 Square Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OPB-40S02-P 40 x 40 mm N-BK7 Square Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-10S03-10 10 x 10 mm N-BK7 Square Precision Ground Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFPXP-60S10-4 60 x 60 mm Hard Glass Square Precision Polished Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-20S05-20 20 x 20 mm N-BK7 Square Precision Ground Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFPXP-80S12-1 80 x 80 mm Hard Glass Square Precision Polished Flat Window; t=12 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFPXP-80S12-20 80 x 80 mm Hard Glass Square Precision Polished Flat Window; t=12 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFPXP-130S18-4 130 x 130 mm Hard Glass Square Precision Polished Flat Window; t=18 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-1525R03-4 15 x 25 mm N-BK7 Rectangular Precision Ground Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-1525R03-10 15 x 25 mm N-BK7 Rectangular Precision Ground Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFB-2030R05-10 20 x 30 mm N-BK7 Rectangular Precision Ground Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |
| OFPXP-80100R15-10 80 x 100 mm Hard Glass Rectangular Precision Polished Flat Window; t=15 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Rectangular |