Amethystum Storage Technology Assigned Two Patents

Positioning method and device for hologram in disk-type holographic storage
Amethystum Storage Technology Co., Ltd., Guangdong, China, has been assigned a patent (11,341,996) developed by Zheng, Mu, Luo, Tiewei, Tian, Jun, Hu, Dejiao, and Liu, Yicheng, Guangdong, China, for “positioning method and device for hologram in disk-type holographic storage.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to a positioning method for a hologram in a disk-type holographic storage medium, a guide groove is formed in advance in the disk-type storage medium and is scribed with a positioning marker that includes index information, position information and crossing angle information. The positions of a positioning laser beam and a recording/reproducing laser beam are applied to the same medium position. When an optical head accesses a recording/reading position at a high speed, the shift multiplex recording/reading is performed starting from a marker position. A servo system controls the laser beams to move along the guide groove and ensures that a focused beam is focused on the medium. According to the method, the position and angular information can be quickly positioned in process of performing cross-shift multiplex recording/reading, the recording/reading speed of the system is improved, and random access is achieved.”

The patent application was filed on January 19, 2021 (17/152,196).

Positioning method and device for hologram in card-type holographic storage medium
Amethystum Storage Technology Co., Ltd., Guangdong, China, has been assigned a patent (11,335,370) developed by Zheng, Mu, Luo, Tiewei, Tian, Jun, and Hu, Dejiao, Guangdong, CN, Liu, Yicheng, Guangdong, China, for “positioning method and device for hologram in card-type holographic storage medium.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The invention relates to a positioning method and device for a hologram in a card-type holographic storage medium, which can be used for beam positioning of cross-shift multiplexing and belong to the technical field of optical holographic storage. A guide groove in a grid shape is engraved on a card-type storage medium, and is provided with positioning markers. Each marker includes position information and direction information, can control an optical head to move along the guide groove, and shift multiplexing/reproducing is performed when recognizing the positioning markers. Since the card-type medium is adopted, a 90-degree rotation can be executed three times, and a total of four times of shift multiplex recording is performed. Random access can be achieved even in a medium that is rotated and used by adopting the positioning method and device described in the present invention.”

The patent application was filed on January 19, 2021 (17/152,490).