Low-Dispersion Focusing Convex Achromatic Lens for Collimators

1. Material Composition:

• Low-Dispersion Glass: Combines specialized glasses (e.g., ED glass, FK61, or N-BK7/F2 achromatic pair) to minimize chromatic aberration.

• Precision Optical Substrate: High homogeneity glass with λ/4 surface accuracy and laser-grade polishing.

2. Key Properties:

• Chromatic Aberration Correction: Eliminates multi-wavelength focal shift for precise beam alignment.

• High Numerical Aperture (NA): Enables efficient light collection and tight focusing capabilities.

• Thermal Stability: Low thermal expansion coefficient maintains performance in varying temperatures.

• AR Coating Options: Broadband or wavelength-specific anti-reflective coatings (>99.2% transmission).

3. Core Functions:

• Beam Collimation: Converts divergent light into a parallel beam with minimal spherical/chromatic errors.

• Focusing Optics: Precisely concentrates polychromatic light to a single point for imaging or laser systems.

• Wavefront Correction: Compensates for aberrations in complex optical assemblies.

4. Applications:

• Laser Collimators: Fiber-coupled laser systems, Lidar, and interferometry devices.

• Microscopy: Confocal and fluorescence microscope objectives requiring achromatic performance.

• Spectroscopy: Monochromator entrance/exit optics and spectrometer focusing modules.

• Telecommunications: EDFA and WDM system collimation/focusing components.