A new type of diamond lens for optical data storage

Since 1985, compact discs and CDs have become standard storage media for music, digital cameras, computer data, and games. Due to the increasing storage capacity requirements for storage discs, the future generation of optical media needs to have higher storage capabilities. . This trend has already appeared on DVD and its follow-up product Blu-Ray (Blu-ray laser) disc. Diamond lens is the core component of next-generation storage technology, and its storage capacity will reach more than 1TB (1000GB) per disk.

The key to improving data storage density is to make small lenses that can work with shortwaves. The storage capacity of the disc is increased through technical improvements, that is, by reducing the wavelength of the laser reader and increasing the digital grating (NA) of the focusing lens. This is necessary to obtain a high NA value, the material used is very important, and high refractive index and transparency in use, and diamond is the material of choice for these conditions.

The synthetic diamond obtained by Element Six Company through chemical treatment Fen deposition method is an ideal optical material that meets the needs. Lens manufacturers have made an important technological breakthrough, so that the lens will be able to store a large amount of data to meet the needs of commercialization. This is also a new development of diamond processing technology in the microscopic field, and it is also a demonstration of the versatility of diamond.