| OPB-20C02-P 20 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-30C02-10-5 30 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-12.7C05-10-5 12.7 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-25C01-P 25 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-60C03-1-5 60 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-25C05-20-2 25 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-10C02-20-2 10 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-40C04-10-5 40 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-10C02-1-5 10 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-10C03-10-5 10 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-50C08-10-5 50 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-50.8C08-10-5 50.8 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-130C18-P 130 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=18 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-40C06-1-5 40 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-30C04-P 30 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-50C05-P 50 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-20C05-P 20 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-25C02-P 25 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-130C13-4-5 130 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=13 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-130C18-10-5 130 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=18 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-15C05-20-2 15 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-25C05-10-5 25 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-40C06-20-2 40 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-20C02-1-5 20 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-20C03-10-5 20 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPB-80C12-10-5 80 mm Dia. N-BK7 Round Optical Parallel Flat Window; t=12 mm Uncoated | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| OPSQ-60C03-P 60 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-40C03-P 40 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-10C02-4-5 10 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-25.4C03-10-5 25.4 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-40C06-P 40 mm Dia. UVFS Round Optical Parallel Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQSP-25.4C05-10-5 25.4 mm Dia. UVFS Round Low Scattering Optical Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQSP-50C05-10-5 50 mm Dia. UVFS Round Low Scattering Optical Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQSP-30C03-10-5 30 mm Dia. UVFS Round Low Scattering Optical Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQSP-30C05-10-5 30 mm Dia. UVFS Round Low Scattering Optical Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-25C03-10-5 25 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-25C03-P 25 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-10C2.3-1-10 10 mm Dia. UVFS Round Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-30C02-4-5 30 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-80C08-P 80 mm Dia. UVFS Round Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-20C05-10-5 20 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-50C05-P 50 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-15C01-P 15 mm Dia. UVFS Round Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-40C03-4-5 40 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-25C05-20-2 25 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-130C13-P 130 mm Dia. UVFS Round Optical Parallel Flat Window; t=13 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-60C10-4-5 60 mm Dia. UVFS Round Optical Parallel Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-150C15-4-5 150 mm Dia. UVFS Round Optical Parallel Flat Window; t=15 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-30C03-10-5 30 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-50C08-20-2 50 mm Dia. UVFS Round Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-15C02-10-5 15 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-25C01-1-5 25 mm Dia. UVFS Round Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-15C02-P 15 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-10C01-4-5 10 mm Dia. UVFS Round Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-130C13-4-5 130 mm Dia. UVFS Round Optical Parallel Flat Window; t=13 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-40C04-4-5 40 mm Dia. UVFS Round Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-130C18-10-5 130 mm Dia. UVFS Round Optical Parallel Flat Window; t=18 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-30C02-P 30 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPCFU-20C02-P 20 mm Dia. CaF2 Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| OPCFU-40C04-P 40 mm Dia. CaF2 Round Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| OPCFU-30C03-P 30 mm Dia. CaF2 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| OPNQ-30C03-P 30 mm Dia. Water Free Synthetic Fused Silica Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSH-20C02-P 20 mm Dia. Sapphire Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | Sapphire ow | Circular |
| OPSH-50C02-P 50 mm Dia. Sapphire Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | Sapphire ow | Circular |
| OPSH-30C02-P 30 mm Dia. Sapphire Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | Sapphire ow | Circular |
| OPSI-30C03-2-3 30 mm Dia. Silicon Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | Silicon | Circular |
| OPZS-30C03-10-3 30 mm Dia. ZnSe Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | ZnSe | Circular |
| WBMA-50C05-10 50 mm Dia. N-BK7 Round AR coated Flat Window; t=5 mm 750-1550nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-15C02-10 15 mm Dia. N-BK7 Round AR coated Flat Window; t=2 mm 750-1550nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-20C03-10 20 mm Dia. N-BK7 Round AR coated Flat Window; t=3 mm 633-1064nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-40C04-10 40 mm Dia. N-BK7 Round AR coated Flat Window; t=4 mm 633-1064nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WSQNAHP-25.4C03-10-532 25.4 mm Dia. UVFS Round High Power AR coated Flat Window; t=3 mm 532nm | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-50C02-1-5 50 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-80C12-4-5 80 mm Dia. UVFS Round Optical Parallel Flat Window; t=12 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-15C03-20-2 15 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-100C15-P 100 mm Dia. UVFS Round Optical Parallel Flat Window; t=15 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-60C06-10-5 60 mm Dia. UVFS Round Optical Parallel Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-10C02-1-5 10 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-10C03-1-5 10 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-50C01-1-5 50 mm Dia. UVFS Round Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-30C02-1-5 30 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-15C03-10-5 15 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-60C03-1-5 60 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-15C05-4-5 15 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-25C05-P 25 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-50C01-P 50 mm Dia. UVFS Round Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-20C03-4-5 20 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQK-30C03-10-5 30 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPCF-20C01-P 20 mm Dia. CaF2 Round Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| OPCFU-25C02-P 25 mm Dia. CaF2 Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| OPCFU-50C03-P 50 mm Dia. CaF2 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| WBMA-30C02-10 30 mm Dia. N-BK7 Round AR coated Flat Window; t=2 mm 750-1550nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-15C02-10-550 15 mm Dia. N-BK7 Round AR coated Flat Window; t=2 mm 400-700nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-20C03-10-550 20 mm Dia. N-BK7 Round AR coated Flat Window; t=3 mm 400-700nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-30C02-10-550 30 mm Dia. N-BK7 Round AR coated Flat Window; t=2 mm 400-700nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| 49-124 9 mm Dia. N-BK7 Precision Protective Flat Window; t=2 mm VIS-NIR 400-1000nm | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| 47-517 12.5 mm Dia. N-BK7 Precision Protective Flat Window; t=3 mm VIS 0 425-675nm | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| OPSQ-100C10-1-5 100 mm Dia. UVFS Round Optical Parallel Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-10C02-20-2 10 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-40C04-10-5 40 mm Dia. UVFS Round Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |