N-BK7 Biconvex Lenses
Positive Focal Length: Biconvex lenses have positive focal lengths, effectively converging collimated light to a single point, making them ideal for various optical applications.
Versatile Applications: With their ability to modulate laser beams, focus light, and facilitate imaging, biconvex lenses are highly versatile and suitable for a wide range of optical systems.
Optimal for Conjugate Ratios Near 1:1: When the absolute finite conjugate ratio is equivalent to or near 1:1 (ranging from 1:5 to 5:1), biconvex lenses are recommended for optimal performance.
Precise Focal Length Calculation: The focal lengths of biconvex lenses can be accurately calculated using the formula: f = (R1*R2) / ((n-1) * (R2-R1)), allowing for precise optical design.
High-Quality N-BK7 Optical Glass: Manufactured using N-BK7 optical glass, these lenses offer low cost, high optical transmission across the visible spectrum and into the near-infrared region, low dispersion, high hardness, resistance to scratches and abrasions, and temperature stability.
Applications: Laser Beam Modulation, Light Focus, Imaging, etc.
Kingwin Optics offers A Series Biconvex Lenses, also known as Double Convex Lenses, which are optical lenses featuring two identical spherical sides with the same curvature radii.
Specifications:
| Lens Form | Biconvex Lens |
| Material | N-BK7 |
| Diameters(mm) | Standard 6.0-50.8mm, or Custom |
| Working Wavelength Range | 350-2200nm |
| Coating | Uncoated/BBAR 350-650nm, 650-1050nm, 1050-1580nm, or Custom |
| Surface Quality (S/D) | 40/20 |
| Irregularity@632.8nm | λ/4-λ |
| Centering Error | ≤2 arc min |
| Clear Aperture | >90% |
| Protective Chamfer | <0.2mmx45° |
Detailed Advantages:
- Positive Focal Length: Biconvex lenses have positive focal lengths, effectively converging collimated light to a single point, making them ideal for various optical applications.
- Versatile Applications: With their ability to modulate laser beams, focus light, and facilitate imaging, biconvex lenses are highly versatile and suitable for a wide range of optical systems.
- Optimal for Conjugate Ratios Near 1:1: When the absolute finite conjugate ratio is equivalent to or near 1:1 (ranging from 1:5 to 5:1), biconvex lenses are recommended for optimal performance.
- Precise Focal Length Calculation: The focal lengths of biconvex lenses can be accurately calculated using the formula: f = (R1*R2) / ((n-1) * (R2-R1)), allowing for precise optical design.
- High-Quality N-BK7 Optical Glass: Manufactured using N-BK7 optical glass, these lenses offer low cost, high optical transmission across the visible spectrum and into the near-infrared region, low dispersion, high hardness, resistance to scratches and abrasions, and temperature stability.
Applications:
- Laser Beam Modulation: Biconvex lenses are commonly used to modulate laser beams, enabling precise control over beam shape, size, and intensity.
- Light Focus: In optical systems requiring light focusing, biconvex lenses effectively converge collimated light to a point, making them suitable for imaging and other applications.
- Imaging: Biconvex lenses are used in imaging systems to form sharp, clear images by converging light from an object onto an image plane.
Kingwin Optics’ stocked N-BK7 Biconvex Lenses offer a wide range of focal lengths from 10mm to 1000mm and diameters from 6.0mm to 50.8mm. These lenses are manufactured using N-BK7 optical glass, known for its low cost, high optical transmission across the visible spectrum and into the near-infrared region (350-2200nm), low dispersion, high hardness, resistance to scratches and abrasions, and temperature stability.
In addition to the stocked N-BK7 biconvex lenses, Kingwin Optics also offers UV Fused Silica Biconvex Lenses and custom biconvex lenses made from various optical materials such as BaF2, CaF2, MgF2, Ge, ZnSe, Sapphire, and others upon request.
The original transmission range of uncoated N-BK7 is 350-2200nm, with an absorption dip positioned at around 2.8 microns. To enhance the transmission of the N-BK7 double convex lens, Broadband Anti-reflection (BBAR) coatings can be applied to accommodate the requirements for multi-wavelength and tunable lasers. Besides the uncoated versions, Kingwin Optics also provides standard N-BK7 double convex lenses with three kinds of broadband AR coatings: 350-650nm, 650-1050nm, and 1050-1580nm to increase transmission and elevate utilization efficiency.
