Introduction to Achromatic Lenses
Achromatic lenses, also known as achromatic doublets, are advanced optical components designed to minimize chromatic aberration and improve imaging quality. These lenses are widely utilized in visible imaging systems, laser beam manipulation, and other high-precision optical applications. By combining two optical elements made of different materials, achromatic lenses effectively correct for chromatic dispersion across two or more selected wavelengths, ensuring sharp and accurate imaging performance.
Optical Design and Material Composition
Achromatic lenses are typically composed of two cemented optical elements: a positive low-index crown glass element and a negative high-index flint glass element. The combination of these materials counteracts the dispersion of light, effectively reducing chromatic aberration. Additionally, achromatic doublets significantly minimize spherical aberration and coma, making them ideal for both broadband and monochromatic applications.
MOK Optics provides achromatic lenses with exceptional optical performance, using high-quality materials from leading glass manufacturers, including:
Optical Glass: CDGM, SCHOTT, OHARA, HOYA
UV-Grade Fused Silica: JGS1, Corning 7980, etc.
IR-Grade Fused Silica: JGS3, Corning 7979, etc.
Infrared Crystals: Germanium (Ge), Sapphire (Al₂O₃), Magnesium Fluoride (MgF₂), Calcium Fluoride (CaF₂), Zinc Selenide (ZnSe), Zinc Sulfide (ZnS), etc.
Performance Advantages
Achromatic lenses offer several key advantages over singlet lenses, making them the preferred choice in high-performance optical applications:
Superior Chromatic Aberration Correction: Achromatic lenses significantly reduce color fringing and blurring by aligning multiple wavelengths to a common focal point.
Improved Spherical Aberration Control: The doublet design ensures enhanced image clarity in monochromatic applications.
Enhanced Beam Quality for Laser Applications: Achromatic doublets optimize beam shaping and focusing, reducing optical distortions.
High Transmission Efficiency: With precision anti-reflection (AR) coatings, these lenses maximize light transmission and minimize surface reflections.
MOK Optics Manufacturing Capabilities
MOK Optics specializes in the production of high-precision achromatic lenses, adhering to stringent quality standards. Our manufacturing capabilities include:
Diameter Range: 3mm – 250mm
Diameter Tolerance: ±0.02mm
Thickness Tolerance: ±0.05mm
Clear Aperture: >90%
Surface Quality: Up to 10-5 scratch-dig
Flatness: λ/8 @ 632.8nm
Centration Accuracy: Up to 30 arc seconds
Coating Options: AR (Anti-Reflective) Coating, HR (High-Reflective) Coating, and customized coatings based on customer specifications.
Applications of Achromatic Lenses
Achromatic lenses are essential components in various advanced optical systems, including:
Microscopy and Imaging Systems: High-resolution microscopes and scientific cameras rely on achromatic lenses for sharp and accurate image reproduction.
Laser Beam Collimation and Focusing: Achromatic doublets improve laser system efficiency by reducing beam aberrations.
Astronomical Telescopes: These lenses enhance the performance of telescopes by eliminating color distortion in captured celestial images.
Biomedical Optics: Used in medical imaging, endoscopy, and ophthalmic devices for precise optical performance.
Industrial and Military Applications: Achromatic lenses are integral in machine vision, defense optics, and laser-based measurement systems.
Conclusion
MOK Optics’ achromatic lenses provide outstanding optical performance, superior aberration correction, and high precision in diverse applications. With cutting-edge manufacturing capabilities and extensive material options, we deliver high-quality achromatic doublets tailored to meet the specific needs of our customers. Whether for scientific research, industrial imaging, or laser processing, our achromatic lenses ensure exceptional reliability and performance.