公开(公告)号：US3609000A

公开(公告)日：1971-09-28

申请号：US3609000D

申请日：1969-09-16

申请人： FUJI PHOTO FILM CO LTD

发明人： MIYANO SHIZUO ,  ENDO HIROTOSHI ,  KONDO ASAJI ,  OOUE SHINGO

IPC分类号： G03B21/62 ,  G03B21/60

CPC分类号： G03B21/62

摘要： A transmission-type projection screen comprising a support having thereon a layer of a binder having microcapsules dispersed therein, said microcapsules containing particles of a material having a refractive index different from that of said binder. The transmission-type projection screen is one wherein the refractive index of said material differs from the refractive index of said binder by a factor of at least 0.02.

公开(公告)号：US3612676A

公开(公告)日：1971-10-12

申请号：US3612676D

申请日：1968-11-22

申请人： FUJI PHOTO FILM CO LTD

发明人： OOBA SEIICHI ,  OOUE SHINGO ,  UEDA HIROYUKI ,  HASHIUE MASAKAZU ,  ENDO HIROTOSHI ,  MURAKOSHI MAKOTO ,  YANAGIDA MASASHI

IPC分类号： G03B21/11 ,  G06F17/22 ,  G06F17/30 ,  G06K17/00 ,  G03B23/08

CPC分类号： G06K17/0016

摘要： A dictionary reader coupled with a key device having a set of keys corresponding to phonetic signs of the language used in the dictionary. By striking the keys in the order of a word, the page of the dictionary bearing the word is projected on a screen of the reader. The reader employs a microfilm projector when the film is driven so as to bring the image of the desired page on the film into alignment with the optical axis of the projector.

公开(公告)号：US3893129A

公开(公告)日：1975-07-01

申请号：US49150474

申请日：1974-07-24

申请人： FUJI PHOTO FILM CO LTD

发明人： ENDO HIROTOSHI ,  OONO HIROSHI ,  OOSAKA SHIGENORI

IPC分类号： G02B7/28 ,  G11B7/08 ,  G11B7/09 ,  G11B7/125 ,  G11C13/04 ,  G02B7/02 ,  G01D15/14

CPC分类号： G11B7/125 ,  G11B7/08 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/0945 ,  G11C13/048

摘要： A phototube is located behind a thermoplastic recording medium, on which a laser beam is focused to record information thereon, to receive light passing therethrough. When the laser beam is accurately focused on the recording medium to record a sharp line, the thermoplastic recording medium is deformed by the concentrated laser beam of high intensity. The laser beam passing through the deformed part of the recording medium is diffracted and scattered, and accordingly, the amount of light received by the phototube changes. By this change in the amount of light, the focusing point is detected and the laser beam focusing means is controlled to always focus the beam sharply on the recording medium. In a preferred embodiment, two phototubes are employed to receive light passing straight through the recording medium and light diffracted and scattered therethrough, respectively.

摘要翻译： 光导管位于热塑性记录介质的后面，激光束被聚焦以在其上记录信息，以接收通过其中的光。 当激光束被精确地聚焦在记录介质上以记录尖锐的线时，热塑性记录介质由高强度的集中激光束变形。 通过记录介质的变形部分的激光束被衍射和散射，因此光电管接收的光量变化。 通过光量的变化，检测到聚焦点，并且控制激光束聚焦装置以始终将光束锐利地聚焦在记录介质上。 在优选实施例中，使用两个光管来接收直接通过记录介质的光，并且光分别衍射并散射穿过其中。