公开(公告)号：US10739267B2

公开(公告)日：2020-08-11

申请号：US15791887

申请日：2017-10-24

申请人： HITACHI, LTD.

发明人： Kakuro Hirai ,  Manabu Shiozawa ,  Takao Watanabe

IPC分类号： G01N21/65 ,  G01J3/44 ,  G02B21/00

摘要： Exemplary embodiments of the present disclosure relate to providing an optical apparatus that is capable of acquiring representative Raman spec trams with high reliability from hyper spectrum images of samples. An optical apparatus according to this disclosure: receives a specifying input that specifies a specific Raman spectrum bandwidth as a reference signal; and extracts a Raman spectrum for a measurement point where an intensity of the reference signal is at or above a reference intensity.

公开(公告)号：US09773521B2

公开(公告)日：2017-09-26

申请号：US15106879

申请日：2014-01-17

申请人： HITACHI, LTD.

发明人： Ryo Imai ,  Koichi Watanabe ,  Manabu Shiozawa

IPC分类号： G11B7/1372 ,  G11B7/128 ,  G11C13/04 ,  G11B7/0045 ,  G11B7/0065 ,  G11B7/127 ,  G11B7/007 ,  G11B7/00 ,  G11B7/0033

CPC分类号： G11B7/128 ,  G11B7/0033 ,  G11B7/0045 ,  G11B7/0065 ,  G11B7/00772 ,  G11B7/127 ,  G11B7/1372 ,  G11B2007/0009 ,  G11C13/04

摘要： In recording technologies for batch formation of a plurality of recording bits in a recording medium by forming a plurality of optical spots using an ultrashort pulse laser and a spatial optical modulator, the batch recordable bit number has an upper limit, resulting in restricted recording speed. The intensity of the optical spot is corrected to increase the batch recordable bit number for increasing the recording speed.

公开(公告)号：US10074428B2

公开(公告)日：2018-09-11

申请号：US14653547

申请日：2012-12-21

申请人： Hitachi, Ltd.

发明人： Manabu Shiozawa ,  Yasuhiko Shimotsuma ,  Masaaki Sakakura ,  Kiyotaka Miura ,  Miki Nakabayashi

IPC分类号： G11B7/0065 ,  G11C13/04 ,  G11B7/128 ,  G11B7/0045 ,  G11B7/013

CPC分类号： G11C13/042 ,  G11B7/00455 ,  G11B7/0065 ,  G11B7/013 ,  G11B7/128 ,  G11C13/048

摘要： In a recording technique in which a plurality of light spots are simultaneously formed by using an ultra-short pulse laser and a spatial phase modulator, and a plurality of recording dots having refractive indexes different from those of the vicinities thereof are formed inside a recording medium, it is hard to make recording quality and a recording density compatible. Therefore, a plurality of dots are recorded at a predetermined dot pitch, and then other dots are recorded between the recorded dots.