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TECHSPEC® λ/4 N-BK7 Precision Windows are ideally suited for industrial and low-power laser applications. The high tolerance design yields minimal beam distortion and scatter. Broadband coating options extend the range of these precision windows through the visible and near-infrared spectra. TECHSPEC® λ/4 N-BK7 Precision Windows are offered in circular and rectangular sizes ranging from 2mm to 200mm.
Note: New additions to this product family may be specified with a transmitted wavefront distortion (TWD) specification instead of a surface flatness. For more information on the difference between these two specifications, see our application note on Understanding Optical Windows.
N-BK7 | |
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Typical transmission of a 3mm thick, uncoated N-BK7 window across the UV - NIR spectra. |
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Typical transmission of a 3mm thick N-BK7 window with MgF2 (400-700nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: Ravg ≤ 1.75% @ 400 - 700nm (N-BK7) Data outside this range is not guaranteed and is for reference only. |
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Typical transmission of a 3mm thick N-BK7 window with VIS-EXT (350-700nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: Ravg ≤ 0.5% @ 350 - 700nm Data outside this range is not guaranteed and is for reference only. |
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Typical transmission of a 3mm thick N-BK7 window with VIS-NIR (400-1000nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: Rabs ≤ 0.25% @ 880nm Data outside this range is not guaranteed and is for reference only. |
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Typical transmission of a 3mm thick N-BK7 window with VIS 0° (425-675nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: Ravg ≤ 0.4% @ 425 - 675nm Data outside this range is not guaranteed and is for reference only. |
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Typical transmission of a 3mm thick N-BK7 window with YAG-BBAR (500-1100nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: Rabs ≤ 0.25% @ 532nm Data outside this range is not guaranteed and is for reference only. |
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Typical transmission of a 3mm thick N-BK7 window with NIR I (600 - 1050nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: Ravg ≤ 0.5% @ 600 - 1050nm Data outside this range is not guaranteed and is for reference only. |
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Typical transmission of a 3mm thick N-BK7 window with NIR II (750 - 1550nm) coating at 0° AOI. The blue shaded region indicates the coating design wavelengh range, with the following specification: Rabs ≤ 1.5% @ 750 - 800nm Data outside this range is not guaranteed and is for reference only. |
Title | Type | Compare | Stock Number | Price | Buy | |
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12.5/12.7mm Optic Dia., SM05 Thin Mount, M4 | Fixed | #13-789 |
₹1,566
Request Quote |
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12.5/12.7mm Optic Dia., SM05 Thin Mount, 8-32 | Fixed | #13-790 |
₹1,566
Request Quote |
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12.5/12.7mm Optic Dia., E-Series Kinematic Mount | Adjustable - Tip-Tilt | #15-865 |
₹3,437
Request Quote |
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12.5/12.7mm Optic Dia., L-Slot Direct Mount | Fixed | #36-416 |
₹4,698
Request Quote |
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12.5/12.7mm Optic Dia., Side Flange Direct Mount | Fixed | #36-418 |
₹4,698
Request Quote |
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2.0 - 35.0mm Optic Dia., Three-Screw Adjustable Ring Mount | Fixed | #03-668 |
₹5,307
Request Quote |
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9.5 - 73.0mm Optic Dia., Three-Screw Adjustable Ring Mount | Fixed | #36-605 |
₹6,612
Request Quote |
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12.5/12.7mm Optic Dia., Kinematic Mount, 2-Screws | Adjustable - Tip-Tilt | #58-850 |
₹7,482
Request Quote |
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12.5/12.7mm Optic Dia., L-Slot and Rotation Direct Mount | Adjustable - Rotary | #36-417 |
₹7,656
Request Quote |
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5.0 - 25.0mm Optic Height, Metric Bar-Type Optic Holder | Fixed | #55-529 |
₹8,091
Request Quote |
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12.5/12.7mm Optic Dia., Kinematic Mount, 3-Screws | Adjustable - Tip-Tilt | #58-853 |
₹8,352
Request Quote |
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7.0 - 40.0 Optic Height, English Bar-Type Optic Holder | Fixed | #03-676 |
₹8,439
Request Quote |
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12.5/12.7mm Optic Dia., Compact Kinematic Mount, 2-Screws | Adjustable - Tip-Tilt | #34-720 |
₹8,526
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10.0 - 60.0mm Optic Height, Metric Bar-Type Optic Holder | Fixed | #55-530 |
₹8,613
Request Quote |
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7.0 - 67.0 Optic Height, English Bar-Type Optic Holder | Fixed | #03-669 |
₹9,222
Request Quote |
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12.5/12.7mm Optic Dia., Compact Kinematic Mount, 3-Screws | Adjustable - Tip-Tilt | #34-721 |
₹9,396
Request Quote |
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8.0 - 118.0 Optic Height, English Bar-Type Optic Holder | Fixed | #03-666 |
₹9,570
Request Quote |
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4.0 - 36.0mm Optic Dia., Self-Centering Jaw Clamp | Fixed | #16-077 |
₹12,528
Request Quote |
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2"/50.8mm Diameter, Bar Type Lens / Filter Holder, Quick Start Optical Mounts | Fixed | #17-530 |
₹12,763
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12.5/12.7mm Optic Dia., Stainless Steel Kinematic Mount, 2-Screws | Adjustable - Tip-Tilt |
#26-814
New
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₹13,050
Request Quote |
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12.5/12.7mm Optic Dia., Stainless Steel Kinematic Mount, 3-Screws | Adjustable - Tip-Tilt |
#26-817
New
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₹14,790
Request Quote |
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12.5/12.7mm Optic Dia., X-Y Translating Optic Mount | Adjustable - Linear (XY) | #62-955 |
₹20,793
Request Quote |
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5.0 - 100.0mm Optic Dia., Self-Centering Jaw Clamp | Fixed | #16-078 |
₹32,625
Request Quote |
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12.5/12.7mm Optic Dia., Precision Gimbal Mount | Adjustable - Gimbal | #84-640 |
₹33,495
Request Quote |
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12.5/12.7mm Optic Dia., X-Y-Z Translating Optic Mount | Adjustable - Linear (XYZ) | #62-958 |
₹34,191
Request Quote |
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