National Institute of Advanced Industrial Science and Technology

Nobuko Fukuda

Manabu Yoshida

Naoki Shirakawa

Hirobumi Ushijima

Takashi Fukuda

Daisuke Barada

Kaoru Tamada

Jun Young Kim

Kyoko Tsuji

Provided is a sheet-shape electrostatic sound pressure-electrical signal conversion device that is three-dimensionally deformable and has a low drive voltage. The sound pressure-electrical signal conversion device includes a polymer sheet sandwiched between a pair of electrodes facing each other, the polymer sheet is a dielectric film, at least one of the electrodes includes an insulating flexible substrate having a plurality of through-holes and a plurality of conductive fibers having one end fixed to the flexible substrate with a pressure sensitive adhesive, electrical conduction in an in-plane direction is formed by contact between the conductive fibers, the conductive fibers are vibrated by giving an electrical signal to the pair of electrodes or the conductive fibers are vibrated by receiving sound pressure to cause the pair of electrodes to output an electrical signal.

Sound pressure-electrical signal conversion device and conversion method for same

There are provided a novel optical information recording material or medium excellent in various holographic optical information recording properties such as sensitivity, response speed, long-term storage stability, and repeatability, and a substance therefor. A photoresponsive heterocyclic azo compound contains an oligomer or polymer having a photoresponsive moiety in at least one of the main chain and side chain, and the photoresponsive moiety is a building block represented by the following formula (1): wherein HCand HCeach represent a ring structure, at least one of them being a heterocyclic structure containing 1 or more heteroatom in the ring, Rand Reach represent a hydrogen atom or a substituent connected to the ring structure and may be the same or different ones, s and t each represent the number thereof, and Xand Xeach represent a terminal group or a linking group, at least one of them being a linking group connected to the main chain of the oligomer or polymer and the terminal group being a hydrogen atom or a substituent.

Photoresponsive heterocyclic azo compound, method for producing the same, and optical information recording medium

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Tsukuba, Japan

Nobuko Fukuda