

Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm, Unmounted BFCX10609
BFCX10609Design Tools
Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm, Unmounted — Model BFCX10609
Operating wavelength 350 nm-2.0 μm, focal length 40.0 mm, Ø25.4 mm, substrate N-BK7.
Product Description
- The best choice for high-power applications
- Optimal performance design for spherical single lenses
- Achieves diffraction-limited performance with small input beam diameters
- Operating wavelength: 350 nm-2 μm (uncoated)
The LBTEK Best-Form Lenses are designed to achieve minimal spherical aberration when using spherical lenses. For spherical lenses, a given focal length can be obtained through different combinations of curvature radii on the front and rear surfaces. However, each surface combination results in varying degrees of spherical aberration. The best-form lenses optimize the curvature radius of each surface to minimize spherical aberration, making them suitable for infinite conjugate applications. LBTEK Best-Form Lenses are manufactured using N-BK7 glass that complies with RoHS standards. N-BK7 is the most commonly used material for high-quality optical components. LBTEK offers uncoated best-form lenses as well as lenses with three types of AR coatings: 400 nm–700 nm, 700 nm–1100 nm, and 1100 nm–1650 nm. All our lenses undergo precision machining and strict quality control to ensure that LBTEK provides users with high-quality lens products at reasonable prices.
Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm, Unmounted
- Substrate Material: N-BK7
- Operating Wavelength: 350 nm-2 μm (uncoated)
- Application: Imaging, Beam Collimation, Focusing
LBTEK's Best Form Lenses are an ideal replacement for cemented lenses in high-power applications at infinite conjugates. Since best-form lenses can optimize the spot size to the minimum, they theoretically achieve diffraction-limited performance. To obtain the best focusing effect, the surface with a smaller radius of curvature should face the collimated light source. All circular lenses from LBTEK can be mounted in LBTEK standard lens sleeves, fixed lens mounts, and various coaxial mounting plates. Customers can choose the optimal mounting method for different application scenarios.
| Clear Aperture | 90% CA |
| Damage Threshold | 4.5J/cm2@355nm, 17.1ns, 100Hz, Ø4.41μm (100 Pulses)0.21J/cm2@515nm, 290fs, 100Hz, Ø10.72μm (100 Pulses)0.50J/cm2@1550nm, 190fs, 100Hz, Ø11.47μm (100 Pulses) |
| Diameter Tolerance | +0.00/-0.10 mm |
| Clear Aperture | 90% CA |
| Operating Wavelength | 350 nm-2.0 μm |
| Diameter | 25.4 mm |
| Eccentricity | ≤3 arcmin |
| Design Wavelength | 587.6 nm |
| Damage Threshold | 4.5J/cm2@355nm, 17.1ns, 100Hz, Ø4.41μm (100 Pulses)0.21J/cm2@515nm, 290fs, 100Hz, Ø10.72μm (100 Pulses)0.50J/cm2@1550nm, 190fs, 100Hz, Ø11.47μm (100 Pulses) |
Product Family: Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm (8 variants)
| Product | SKU | Size | Clear Aperture | Operating Wavelength | |
|---|---|---|---|---|---|
| Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm, Unmounted BFCX10609 Current |
BFCX10609
| 25.4 mm | 90% CA | 350 nm-2.0 μm | |
| Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm, Unmounted BFCX10613 |
BFCX10613
| 25.4 mm | 90% CA | 350 nm-2.0 μm | View |
| Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm, Unmounted BFCX10610 |
BFCX10610
| 25.4 mm | 90% CA | 350 nm-2.0 μm | View |
| Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm, Unmounted BFCX10612 |
BFCX10612
| 25.4 mm | 90% CA | 350 nm-2.0 μm | View |
| Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm, Unmounted BFCX10617 |
BFCX10617
| 25.4 mm | 90% CA | 350 nm-2.0 μm | View |
| Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm, Unmounted BFCX10615 |
BFCX10615
| 25.4 mm | 90% CA | 350 nm-2.0 μm | View |
| Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm MBFCX10613 |
MBFCX10613
| 25.4 mm | 90% CA | 350 nm-2.0 μm | View |
| Best Form Lens, N-BK7, Uncoated: 350 nm-2.0 μm MBFCX10609 |
MBFCX10609
| 25.4 mm | 90% CA | 350 nm-2.0 μm | View |





