| CaF2-W-50.8x2 50.8 mm Dia. CaF2 Flat Window; t=2mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | CaF2 | Circular |
| BF-W-6.85-0.5 6.9 mm Dia. BaF2 Flat Window; t=0.5mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | BAF2 | Circular |
| BF-W-25.4-2 25.4 mm Dia. BaF2 Flat Window; t=2mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | BAF2 | Circular |
| BF-W-25.4-5 25.4 mm Dia. BaF2 Flat Window; t=5mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | BAF2 | Circular |
| BF-W-50.8-4 50.8 mm Dia. BaF2 Flat Window; t=4mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | BAF2 | Circular |
| BF-W-63.5-6 63.5 mm Dia. BaF2 Flat Window; t=6mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | BAF2 | Circular |
| BF-W-63.5-8 63.5 mm Dia. BaF2 Flat Window; t=6mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | BAF2 | Circular |
| BF-W-152.4-10 152.4 mm Dia. BaF2 Flat Window; t=10mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | BAF2 | Circular |
| FS-w-76.2-6 76.2 mm Dia. UVFS Flat Window; t=6mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| FS-w-76.2-8 76.2 mm Dia. UVFS Flat Window; t=8mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| FS-w-101.6-8 101.6 mm Dia. UVFS Flat Window; t=8mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| GE-W-25.4-5 25.4 mm Dia. Germanium Flat Window; t=5mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Germanium | Circular |
| GE-W-25.4-6 25.4 mm Dia. Germanium Flat Window; t=6mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Germanium | Circular |
| GE-W-50.8-1 50.8 mm Dia. Germanium Flat Window; t=1mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Germanium | Circular |
| GE-W-50.8-5 50.8 mm Dia. Germanium Flat Window; t=5mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Germanium | Circular |
| KB-W-25.4x2 25.4 mm Dia. KBr Flat Window; t=2mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| KB-W-25.4x6 25.4 mm Dia. KBr Flat Window; t=6mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| KB-W-50.8x6 50.8 mm Dia. KBr Flat Window; t=6mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| KB-W-63.5x6 63.5 mm Dia. KBr Flat Window; t=6mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| KC-W-12.7-3 12.7 mm Dia. KCl Flat Window; t=3mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| KC-W-63.5-6 63.5 mm Dia. KCl Flat Window; t=6mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| NC-W-25.4-3 25.4 mm Dia. NaCl Flat Window; t=3mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| NC-W-38.1-4 38.1 mm Dia. NaCl Flat Window; t=4mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| NC-W-38.1-6 38.1 mm Dia. NaCl Flat Window; t=6mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | UVFS | Circular |
| MF-W-38.1x2 38.1 mm Dia. MgF2 Flat Window; t=2mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Magnesium Fluoride | Circular |
| MF-W-38.1x4 38.1 mm Dia. MgF2 Flat Window; t=4mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Magnesium Fluoride | Circular |
| AL-W-16x0.75 16 mm Dia. Sapphire Flat Window; t=0.75mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Al2O3 | Circular |
| AL-W-25.4-3 25.4 mm Dia. Sapphire Flat Window; t=3mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Al2O3 | Circular |
| SI-W-38.1-6 38.1 mm Dia. Silicon Flat Window; t=6mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Silicon | Circular |
| SI-W-63.5-3 63.5 mm Dia. Silicon Flat Window; t=3mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Silicon | Circular |
| SI-W-76.2-3 76.2 mm Dia. Silicon Flat Window; t=3mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | Silicon | Circular |
| ZnSe-W-25.4-1 25.4 mm Dia. ZnSe Flat Window; t=1mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | ZnSe | Circular |
| ZnSe-W-25.4-5 25.4 mm Dia. ZnSe Flat Window; t=5mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | ZnSe | Circular |
| ZnSe-W-32x3 32 mm Dia. ZnSe Flat Window; t=3mm Uncoated | Optics | Window | Flat Window | Alkor Technologies | ZnSe | Circular |
| WBMA-25C02-10-550 25 mm Dia. N-BK7 Round AR coated Flat Window; t=2 mm 400-700nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-40C04-10 40 mm Dia. N-BK7 Round AR coated Flat Window; t=4 mm 750-1550nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WSQNAHP-50C05-10-532 50 mm Dia. UVFS Round High Power AR coated Flat Window; t=5 mm 532nm | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| 45-574 5 mm Dia. N-BK7 Precision Protective Flat Window; t=2 mm MgF2 400-700nm | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| 49-121 9 mm Dia. N-BK7 Precision Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| OPSQ-10C05-20-2 10 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-12.7C03-4-5 12.7 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-20C05-P 20 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-10C01-1-5 10 mm Dia. UVFS Round Optical Parallel Flat Window; t=1 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-130C18-1-5 130 mm Dia. UVFS Round Optical Parallel Flat Window; t=18 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-70C2.3-0.2-10 70 mm Dia. UVFS Round Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-20C03-P 20 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-30C03-P 30 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-100C10-P 100 mm Dia. UVFS Round Optical Parallel Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-100C15-4-5 100 mm Dia. UVFS Round Optical Parallel Flat Window; t=15 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-40C02-P 40 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-80C08-1-5 80 mm Dia. UVFS Round Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-150C20-4-5 150 mm Dia. UVFS Round Optical Parallel Flat Window; t=20 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQK-50C08-10-5 50 mm Dia. UVFS Round Optical Parallel Flat Window; t=8 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-30C05-20-2 30 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPCFU-40C03-P 40 mm Dia. CaF2 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| OPCFU-50C05-P 50 mm Dia. CaF2 Round Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| WBMA-15C03-10 15 mm Dia. N-BK7 Round AR coated Flat Window; t=3 mm 633-1064nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-50C05-10-550 50 mm Dia. N-BK7 Round AR coated Flat Window; t=5 mm 400-700nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-20C02-10 20 mm Dia. N-BK7 Round AR coated Flat Window; t=2 mm 633-1064nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-30C03-10 30 mm Dia. N-BK7 Round AR coated Flat Window; t=3 mm 633-1064nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-20C02-10-550 20 mm Dia. N-BK7 Round AR coated Flat Window; t=2 mm 400-700nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| 47-515 5 mm Dia. N-BK7 Precision Protective Flat Window; t=2 mm VIS 0 425-675nm | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| 45-573 5 mm Dia. N-BK7 Precision Protective Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| OPSQ-150C20-1-5 150 mm Dia. UVFS Round Optical Parallel Flat Window; t=20 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-30C05-10-5 30 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-130C13-10-5 130 mm Dia. UVFS Round Optical Parallel Flat Window; t=13 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-15C05-10-5 15 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-40C04-P 40 mm Dia. UVFS Round Optical Parallel Flat Window; t=4 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-20C02-10-5 20 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-10C05-10-5 10 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-80C12-1-5 80 mm Dia. UVFS Round Optical Parallel Flat Window; t=12 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQK-50C05-10-5 50 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-30C05-4-5 30 mm Dia. UVFS Round Optical Parallel Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-25C02-4-5 25 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-25C03-1-5 25 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-60C10-20-2 60 mm Dia. UVFS Round Optical Parallel Flat Window; t=10 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-10C03-10-5 10 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-20C02-4-5 20 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-40C06-1-5 40 mm Dia. UVFS Round Optical Parallel Flat Window; t=6 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-80C2.3-0.2-10 80 mm Dia. UVFS Round Optical Parallel Flat Window; t=2.3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-12.7C03-10-5 12.7 mm Dia. UVFS Round Optical Parallel Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-80C12-P 80 mm Dia. UVFS Round Optical Parallel Flat Window; t=12 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPSQ-15C02-4-5 15 mm Dia. UVFS Round Optical Parallel Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | UVFS | Circular |
| OPCF-30C03-P 30 mm Dia. CaF2 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| OPCF-50C03-P 50 mm Dia. CaF2 Round Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| OPCF-50C05-P 50 mm Dia. CaF2 Round Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | CaF2 | Circular |
| OPSH-40C02-P 40 mm Dia. Sapphire Round Flat Window; t=2 mm Uncoated | Optics | Window | Flat Window | OptoSigma | Sapphire ow | Circular |
| OPSI-50C05-2-3 50 mm Dia. Silicon Round Flat Window; t=5 mm Uncoated | Optics | Window | Flat Window | OptoSigma | Silicon | Circular |
| WBMA-30C02-10 30 mm Dia. N-BK7 Round AR coated Flat Window; t=2 mm 633-1064nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-25C03-10 25 mm Dia. N-BK7 Round AR coated Flat Window; t=3 mm 750-1550nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-30C03-10 30 mm Dia. N-BK7 Round AR coated Flat Window; t=3 mm 750-1550nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-15C03-10-550 15 mm Dia. N-BK7 Round AR coated Flat Window; t=3 mm 400-700nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| WBMA-25C03-10-550 25 mm Dia. N-BK7 Round AR coated Flat Window; t=3 mm 400-700nm | Optics | Window | Flat Window | OptoSigma | N-BK7 | Circular |
| 49-123 9 mm Dia. N-BK7 Precision Protective Flat Window; t=2 mm VIS 0 425-675nm | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| 49-122 9 mm Dia. N-BK7 Precision Protective Flat Window; t=2 mm MgF2 400-700nm | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| 45-256 10 mm Dia. N-BK7 Precision Protective Flat Window; t=2 mm MgF2 400-700nm | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| 45-075 12.5 mm Dia. N-BK7 Precision Protective Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| 45-658 12.5 mm Dia. N-BK7 Precision Protective Flat Window; t=3 mm VIS-NIR 400-1000nm | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| 47-518 15 mm Dia. N-BK7 Precision Protective Flat Window; t=3 mm VIS 0 425-675nm | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |
| 36-993 25 mm Dia. N-BK7 Precision Protective Flat Window; t=3 mm Uncoated | Optics | Window | Flat Window | Edmund Optics | N-BK7 | Circular |