Custom Superpolished Fused Silica Plano Convex Lens Product Discription
Superpolished Fused Silica Plano Convex Lenses are ultra-precision optical components made from high-purity fused silica and processed through super-precision polishing, achieving a surface roughness at the sub-angstrom level, typically <1 Å RMS. They are particularly suitable for use in high-power laser systems, ultra-low scattering systems, and ultraviolet optical systems. Asin Optics is a manufacturer of super-smooth Plano Convex Lenses in China. We produce and customize lenses with sub-nanometer surface roughness, diffraction-limited surface accuracy, and high-purity fused silica for applications such as high-resolution imaging, laser material processing, and precision metrology.
Custom Superpolished Fused Silica Plano Convex Lens Key Features
- Our superpolished fused silica plano-convex lenses feature all optical surfaces, including both the plano and convex sides, processed with advanced polishing techniques, achieving a consistently stable surface roughness of Ra 0.1–0.2 nm.
- The substrate material selected for our superpolished fused silica plano-convex lenses is high-purity fused silica, which offers extremely high transmittance across the 185–2100 nm spectral range. Therefore, these lenses are also suitable for applications such as ultraviolet lithography and high-power near-infrared laser systems.
- Fused silica has a near-zero coefficient of thermal expansion, ensuring that the radius of curvature, focal length, and surface figure of the lens remain almost unchanged over a wide range of temperature variations. As a result, regardless of the amount of laser power absorbed, the focal point remains precise.
- Currently, the surface figure accuracy on the convex side can be controlled to 1/20λ and 1/30λ, with a relatively small transmitted wavefront error.
- For this lens, we offer flexible coating services, including broadband anti-reflection coatings, single-point anti-reflection coatings, and dual-band anti-reflection coatings. All coatings are manufactured using processes that ensure a high laser-induced damage threshold, capable of withstanding continuous laser pulse exposure.
Custom Superpolished Fused Silica Plano Convex Lens Metrology and qualtiy control
Superpolished Fused Silica Plano Convex Lens Technical Datasheet
Custom Capability Of Ultra Smooth Optical Lens
Superpolished Fused Silica Plano Convex Lens Applications
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Medical and Aesthetic Laser
In medical and aesthetic devices such as picosecond and femtosecond fractional lasers, the beam must be precisely focused by the lens to penetrate the epidermis and target chromophores in the dermis. Any surface scattering causes energy dispersion, and absorption-induced thermal lensing in the lens leads to focal point drift. Superpolished fused silica plano-convex lenses, with near-zero scattering and near-zero absorption, deliver a stable focal point and consistent treatment depth.
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Semiconductor Lithography
In the illumination and projection systems of DUV and EUV lithography tools, plano-convex lenses serve as beam condensers and wavefront-shaping elements. Sub-nanometer surface roughness on these lenses directly triggers Rayleigh scattering stray light. Lens absorption and fluorescence cause thermal drift and background photon contamination. Superpolished fused silica plano-convex lenses provide an “optically pristine” transmission channel for the lithography system, injecting no additional noise or deviation into the optical path.
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High Power Fiber Lasers
In high-power continuous-wave and pulsed fiber lasers (multi-kilowatt to tens of kilowatts), the collimating lens after the output endcap must withstand extremely high power densities. Surface defects and coating absorption in conventional lenses create thermal lensing, leading to changes in beam divergence and focal position drift. The superpolished surface and high-purity substrate compress absorption and scattering to their physical limits, ensuring the excellent beam quality of the fiber laser is preserved.
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Scientific Research
In cutting-edge scientific research such as ultrafast laser pump-probe experiments, high-harmonic generation, precision spectroscopy, optical frequency standards, and ion trapping, any scattered photons from the lens surface can become sources of parasitic interference, false counts, or stray heating—burying weak signals in the noise background. Superpolished fused silica plano-convex lenses ensure long-term focal spot pointing and wavefront stability
