Super-Polished Optics

 

  Super-polishing is a method of grinding tens of times smaller than the abrasive particles used in normal processing. It is possible to improve optical performance and minimize scattering loss by realizing optical surface roughness on sub-nano scale through super-polishing processing. It also minimizes the potential for micro-crack inherent in general polishing methods, resulting in low stress, high reliability, and minimal surface defects (Scratch / Dig) and particles for a perfect optical surface. This excellent optical surface performance guarantees ppm (0.000x%) loss characteristics in ultra-low loss optics, as well as long-lasting, high-performance laser optics without laser damage, even in high-power laser optics.

• Surface Roughness : Å
• Surface Scattering & Absorption Loss at ppm level
• Particle Free, Scratch/Dig Free
• Ideal for use with high power lasers and other low-loss applications
• Substrate Materials : Fused Silica, Zerodur, BK-7

  Implementing an high quality shape on the optical plane is essential in precision optics, and large-scale implementation of high quality optical surface is a key technology. The surface shape of the general polishing method is a method in which the object to be processed and the surface supporting it are engaged with each other to apply pressure. Local shape correction is not only impossible, but also a limitation of shape implementation accuracy. In addition, there is a limit depending on the skill of the operator and the problem that the surface plate is processed and modified together as the processing proceeds. Therefore, in order to realize an ultra-high optical surface, the concept of finishing is required to read the shape of the processing result according to the general polishing method and to correct the point calculated by the point processing method. This point correction processing method is highly reproducible because it does not stress the substrate and is automated. By applying this “correction after measurement” point processing method, the shape accuracy of the optical surface can be increased to the measurement limit of the measuring equipment, and through this, It is possible to manufacture a master on a large area substrate.

• Surface Figure : λ/20
• Large Area Substrates : 150 mm²
• Stress-free Optics
• Substrate Materrials : Fused Silica, Zerodur, BK-7