Amethystum Storage Technology Assigned Three Patents

Holographic multiplexed recording method for increasing storage capacity
Amethystum Storage Technology Co., Ltd, Guangdong, China, has been assigned a patent (11,308,988) developed by Zheng, Mu, Luo, Tiewei, Tian, Jun, Hu, Dejiao, and Liu, Yicheng, Guangdong, China, for a “holographic multiplexed recording method for increasing storage capacity.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A holographic multiplexed recording method for increasing storage capacity is disclosed. In a holographic recording and reproducing device, the moving direction of a storage medium is not coplanar with the plane where the optical axes of signal light and reference light are located, or the relative moving direction of the storage medium and the signal light or the reference light is not coplanar with the plane where the optical axes of the signal light and the reference light are located. Through the method, a certain angle exists between the grating vector direction and the moving direction or the relative moving direction, so that the phenomenon that the grating vector directions are the same does not occur when the medium is subjected to multiplexed recording after being rotated or flipped. Not only is multiplexing number increased, but also crosstalk caused by the same grating vector direction is prevented.”

The patent application was filed on December 28, 2020 (17/135,287).

Holographic storage device and method for simultaneously recording and reading on two sides
Amethystum Storage Technology Co., Ltd, Guangdong, China, has been assigned a patent (11,302,359) developed by Zheng, Mu, Luo, Tiewei, Tian, Jun, Hu, Dejiao, and Liu, Yicheng, Guangdong, China, for “holographic storage device and method for simultaneously recording and reading on two sides.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The present invention relates to a holographic storage device and method for simultaneously recording and reading on two sides, and pertains to the technical field of optical holographic storage. The device and method disclosed in the present invention use a characteristic that orthogonal light would not interfere with each other and a Bragg selectivity characteristic for holographic storage, and use two optical heads to constitute two interference fields orthogonal in polarization directions on two sides of a same position of a holographic storage medium, so as to perform two-path simultaneous recording and reading on a hologram. The device and method provided in the present invention implement two-path parallel recording and reading of holographic storage, and combine shift multiplexing and circumferential rotation multiplexing, thereby improving the speed of an information data recording and reading process while increasing a capacity of the holographic storage.”

The patent application was filed on December 28, 2020 (17/135,201).

Holographic data storage device with single-arm structure
Amethystum Storage Technology Co., Ltd, Guangdong, China, has been assigned a patent (11,302,358) developed by Zheng, Mu, Luo, Tiewei, Tian, Jun, Hu, Dejiao, and Liu, Yicheng, Guangdong, China, for a “holographic data storage device with single-arm structure.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The present invention relates to a holographic data storage device with a single-arm structure, and belongs to the technical field of optical holographic storage. According to the device disclosed in the present invention, a part of a reference arm and a part of a signal arm are integrated together to form a single-arm structure, which can not only reduce the number of optical and mechanical elements, but also reduce the system volume and cost without degrading performance. In addition, a signal beam and a reference beam share the same relay lens, so that the impact of environmental interference on the two beams is equal, and the stability of the entire system is improved.”

The patent application was filed on December 28, 2020 (17/135,113).