公开(公告)号：JPH0815794A

公开(公告)日：1996-01-19

申请号：JP17016594

申请日：1994-06-28

Applicant: SONY CORP

Inventor： SAKAMOTO MITSUO ,  NAKAMURA AKIRA ,  ABE TSUGUHIRO

IPC: G03B33/12 ,  G02B27/18 ,  G02F1/13 ,  G03B21/10 ,  H04N5/74

Abstract: PURPOSE:To obtain a projector device which can be miniaturized and whose thickness can be reduced without causing the interference of an illumination system with a projection system by bending a projecting direction of three-color image light in a direction free from the interference of the three-color image light with a white light source at a prescribed angle. CONSTITUTION:An optical path from a light source 2 to a projecting lens is constituted of two layers; a hue separation layer 41A and a hue composition layer 41B, and also, a composite light projecting direction is bent by a deflecting mirror 48 incorporated with a projecting lens front part 46B at 90 deg. in a direction free from the interference of the composite light with the light source 2. Thus, the projector device 40 can be miniaturized and the.thickness of the device can be reduced without causing the interference of the light source 2 with the projecting lens system. And also, in the case the optical system is constituted of the smallest optical system by adjusting the attachment directions of liquid display panels 45A to 45C, the direction of a projection viewing angle is easily aligned with the direction of a projecting screen 8 by rotating the whole optical unit even in the case the direction of the projection viewing angle emitted from the projecting lens is not aligned with the direction of the projecting screen 8.

公开(公告)号：JPS57203231A

公开(公告)日：1982-12-13

申请号：JP8836581

申请日：1981-06-09

Applicant: SONY CORP

Inventor： KIHARA NOBUTOSHI ,  OZAKI YOSHIO ,  SAKAMOTO MITSUO ,  FUCHITA KOUICHI

IPC: G11B5/82 ,  G11B5/012 ,  G11B5/74 ,  G11B25/04

Abstract: PURPOSE:To provide a random access function, by constituting a magnetic tape acting one or both sides as magnetic surfaces, as a recording medium wound around a disc so that a small and constant groove is generated between tapes. CONSTITUTION:A disc-shape disc substrate 1, a magnetic tape 2 wound on the substrate 1, a tape 3 wound so that the tape is located between adjacent magnetic tapes 2 and having narrower width than that of the magnetic tape 2, a groove 2' formed between the magnetic tapes 2 with the tape 3, and an adhesives 4 are provided. One or both sides of the magnetic tape 2 can be used as the magnetic surface, and an interval (d) of the grooves 2' is almost equal to the width of the tape 3 and is constant. The edge of the magnetic tape 2 and tape 3 is fixed to the disc base 1 with the adhesives.