N-BK7 Plano Concave Lenses

• Diverging Optics: Specifically engineered to diverge parallel light, ideal for applications requiring light spreading or beam expansion.
• Broad Spectral Range: Offers high transmittance across a wide spectrum, from visible light to near-infrared wavelengths (350-2000nm), ensuring versatility in various optical setups.
• High-Quality Material: Constructed from BK7 optical glass, renowned for its exceptional optical properties, including high transmittance and low dispersion.
• Precision Design: Engineered with precise diameter and center thickness tolerances, ensuring uniformity and reliability in optical performance.
• Optimized Surface Quality: Features λ/4 surface figure at 633nm, ensuring excellent imaging quality and minimizing optical aberrations.
  Customizable Options: Available in various diameters (Dia), effective focal lengths (EFL), back focal lengths (BFL), center thicknesses (CT), and edge thicknesses (ET), offering flexibility to suit specific application requirements.
• Coating Options: Offered with optional custom anti-reflective (AR) coatings to enhance transmission and reduce glare, ensuring optimal performance in different lighting conditions.

Summary:

• Material: BK7
• Design Wavelength: 587.6nm
• Diameter Tolerance: +0.0/-0. 1mm
• Center Thickness Tolerance: ±0.1mm
• Surface Figure: λ/4 @633nm
• Focal Length Tolerance: ±1%
• Centration: 3 arc min.
• Surface Quality: 40/20-60/40
• Bevel: 0.2×45°
• Coating: Uncoated or Customized AR

• Laser Systems: Utilized for beam expansion, collimation, and beam shaping in laser processing equipment, scientific lasers, and industrial laser systems.
• Telescope Optics: Integrated into telescopes and astronomical instruments for light divergence and aberration correction, facilitating clear and precise astronomical observations.
• Optical Instrumentation: Applied in optical setups and experimental setups for light spreading, spatial filtering, and optical alignment, enabling diverse research and experimental applications.
• Medical Devices: Utilized in medical imaging systems and diagnostic instruments for light diffusion and focusing, facilitating accurate analysis and diagnosis.
• Industrial Applications: Employed in industrial measurement systems, barcode scanners, and metrology equipment for precise light manipulation and beam control.