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1. 发明专利

JPH1186325A OPTICAL PICKUP AND ASSEMBLING METHOD THEREFOR 失效
公开(公告)号：JPH1186325A
公开(公告)日：1999-03-30
申请号：JP24232497
申请日：1997-09-08
申请人： SHARP KK
发明人： YOSHIMOTO AKITO , YOSHIDA YOSHIO
IPC分类号： G11B7/12 , G11B7/124 , G11B7/22 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup in which the position adjustment of a photodetecting means is easy and highly accurate, which is small in size and low in cost and whose reliability is high and its assembling method. SOLUTION: This optical pickup has a light source 1, a stem 4 to which the light source 1 is fixed and a photodetecting means which converges light which is radiated from the light source 1 and is reflected on a recording medium and which detects the reflected light. Then, the photodetecting means is provided with a wedge shaped fixing member 17 adheringly fixing an optical waveguide element 12 to the stem 4 and adheringly fixes the optical waveguide element 12 to the stem 4 with the wedge shaped fixing member 17.

2. 发明专利

JPH1164675A PRODUCTION OF OPTICAL COUPLER 失效
公开(公告)号：JPH1164675A
公开(公告)日：1999-03-05
申请号：JP23006697
申请日：1997-08-26
申请人： SHARP KK
发明人： YAMAMOTO HIROYUKI , YOSHIDA YOSHIO
IPC分类号： G02B6/34 , G02B6/122
摘要： PROBLEM TO BE SOLVED: To make it possible to produce an optical coupler which is excellent in productivity and has a stable operating characteristic. SOLUTION: A dielectric block subjected to a plasma treatment on the adhesive surface is adhered by a photosetting adhesive 15 to a gap layer 13 on an optical waveguide layer 12 likewise subjected to the plasma treatment on the adhesive surface. The adhesive 15 is impregnated into the spacing between the optical waveguide layer 12 parted by a previously patterned photoresist layer 20 and the dielectric block layer and is then cured. The upper surface of the dielectric block is pressed and fixed by a metallic probe at the time of impregnation of the adhesive 15. The upper surface of the dielectric block is optically polished to allow the observation of the way of the impregnation of the adhesive 15. The photoresist layer 20 is thereafter removed by executing a dicing treatment, by which individual element chips are obtd.

3. 发明专利

JPH1078522A OPTICAL WAVEGUIDE TYPE MODE SPLITTER 失效
公开(公告)号：JPH1078522A
公开(公告)日：1998-03-24
申请号：JP4271197
申请日：1997-02-26
申请人： SHARP KK
发明人： YOSHIDA YOSHIO , YAMAMOTO HIROYUKI
IPC分类号： G02B6/126 , G02F1/035
摘要： PROBLEM TO BE SOLVED: To easily separate a mode even when a beam is a dispersing light beam having a large opening angle by making a first and a second mode beams incident on the boundaries of a first and a second optical waveguides with a specified incident angle and forming the boundary to be a shape for dividing the mode beam into 2n beams and propagating in a different direction. SOLUTION: A first optical waveguide (region A) having equivalent refractive indices of Ni1, Nj1 for a first and a second mode beam is connected to a second optical waveguide (region B) having equivalent refractive indices of Ni2, Nj2, Ni1

4. 发明专利

JP2574907B2 失效
公开(公告)号：JP2574907B2
公开(公告)日：1997-01-22
申请号：JP29810589
申请日：1989-11-15
申请人： SHARP KK
发明人： YOSHIDA YOSHIO , NAKADA YASUO , SATO HIDEO , OGATA NOBUO , KAMYAMA TETSUO , KURATA YUKIO
IPC分类号： G02B5/18 , G11B11/10 , G11B11/105

5. 发明专利

JPH08171747A OPTICAL PICKUP DEVICE 失效
公开(公告)号：JPH08171747A
公开(公告)日：1996-07-02
申请号：JP31534994
申请日：1994-12-19
申请人： SHARP KK
发明人： OKADA NORIAKI , MINAMI KOJI , YAMAMOTO HIROYUKI , YOSHIDA YOSHIO , KURATA YUKIO
IPC分类号： G02B6/122 , G02B6/42 , G11B7/09 , G11B7/12 , G11B7/124 , G11B7/135 , G11B11/10 , G11B11/105
摘要： PURPOSE: To reduce the size and weight of an optical pickup device. CONSTITUTION: A beam splitter 5 constituted by sticking a prism 14 and flat plate glass 13 is arranged on an optical path between a collimator lens 6 and a semiconductor laser element 1. The return light from a magneto-optical disk is separated to servo error signal detecting light 9 and magneto-optical signal detecting light 10 by this beam splitter 5. The servo error signal detecting light 9 is diffracted by a hologram 4 and is introduced to a photodiode 11. The magneto-optical signal detecting light 10 is introduced to an optical waveguide element without passing the hologram 4.

6. 发明专利

JPH0862412A MANUFACTURE OF DIFFRACTION GRATING 失效
公开(公告)号：JPH0862412A
公开(公告)日：1996-03-08
申请号：JP20052894
申请日：1994-08-25
申请人： SHARP KK
发明人： YAMAMOTO HIROYUKI , KURATA YUKIO , YOSHIDA YOSHIO , OKADA NORIAKI , MINAMI KOJI
IPC分类号： G02B5/18 , G03F7/20
摘要： PURPOSE: To enhance the optical characteristic of a diffraction grating to be obtained by carrying out development after the exposure by means of two luminus flux has been carried out from the opposite side of the resist-coated surface of a transparent base plate. CONSTITUTION: A positive type photoresist 11 is coated and dried on a transparent base plate 12 made of quartz glass. Making the front surface of the surface on which the photoresist 11 has been coated, the exposure by means of the two luminus flux interference method is carried out from the rear side of the transparent base plate 12. In this case, the opening of a photosensitive part 13 is made narrower as it is nearer to the front surface. Thereafter, development is carried out. Since the chemical reaction due to development advances from the front surface, the opening is widened wider as it is nearer to the front surface, so that the sectional shape of the photoresist pattern 14 becomes a rectangular shape by the offset of the two actions of exposure and development, and the duty factor approaches 0.5. By utilizing this photoresist pattern 14, the transparent base plate 12 is etched by the reactive etching due to, for instance, CF4 .

7. 发明专利

JPH0823605B2 失效
公开(公告)号：JPH0823605B2
公开(公告)日：1996-03-06
申请号：JP14810089
申请日：1989-06-09
申请人： SHARP KK
发明人： YOSHIDA YOSHIO , MYAKE TAKAHIRO , NAKADA YASUO , KURATA YUKIO
IPC分类号： G02B5/18 , G02B5/30 , G11B11/10 , G11B11/105

8. 发明专利

JPH06110017A POLARIZED LIGHT DETECTING DEVICE 失效
公开(公告)号：JPH06110017A
公开(公告)日：1994-04-22
申请号：JP25842492
申请日：1992-09-28
申请人： SHARP KK
发明人： MIYAKE TAKAHIRO , YOSHIDA YOSHIO , NAKADA YASUO , KURATA YUKIO
IPC分类号： G01J4/04 , G02B5/18 , G02B5/30 , G02B27/28 , G11B11/10 , G11B11/105
摘要： PURPOSE:To detect a signal of good quality with a small noise component by suppressing the interference phenomenon of luminous flux on a polarized light diffracting element which causes the generation of a signal noise component. CONSTITUTION:An incidence area of the polarized light diffracting element 10 where luminous flux is made incident is limited to suppress interference between luminous flux L2 which is diffracted by a 1st diffraction grating 12 and reflected by the surface where a 2nd diffraction grating 13 is formed and the incident luminous flux L. Further, the luminous flux L which is made incident on the polarized light diffracting element is made into a spherical wave and then variation in the intensity of light which is converted on a photodetector due to the interference is made small. Further, the interference or variation in the light intensity due to the interference is suppressed by limiting the formation width of the 1st diffraction grating 12 of the polarized light diffracting element 10 and making the thickness (t) of a substrate 11 larger than specific width.

9. 发明专利

JPH0667046A OPTICAL INTEGRATED CIRCUIT 失效
公开(公告)号：JPH0667046A
公开(公告)日：1994-03-11
申请号：JP22248792
申请日：1992-08-21
申请人： SHARP KK
发明人： OKADA NORIAKI , MINAMI KOJI , MIKI RENZABUROU , YAMAMOTO HIROYUKI , YOSHIDA YOSHIO , KURATA YUKIO
IPC分类号： G02B6/122 , G02B6/12 , G02B6/34 , G02B6/42 , H01L31/0232 , H01L31/0236
摘要： PURPOSE:To couple waveguided light to an optical detector by using a grating coupler, to enhance the avaitability of the waveguided light by providing a reflecting film on the end face of a waveguide and to enable efficient optical detection. CONSTITUTION:In order to couple waveguided light 8 to an optical detector 2, a grating coupler 6 having a pitch determined so as to attain perpendicular emergence is formed in part of an optical waveguide layer 4 on the optical detector 2. A reflecting film 7 for reflecting light radiated on the upper clad side 5 is formed above the grating coupler 6, a reflecting film 14 for propagating the guided light in the reverse direction is formed on the end of the waveguide and light radiated on the substrate 1 side can be efficiently detected.

10. 发明专利

JPH0568774B2 失效
公开(公告)号：JPH0568774B2
公开(公告)日：1993-09-29
申请号：JP17851386
申请日：1986-07-28
申请人： SHARP KK
发明人： OGATA NOBUO , YOSHIDA YOSHIO , INOE TERUAKI , NAKADA YASUO , SATO HIDEO , TANAKA TOSHUKI
IPC分类号： G11B7/09 , G02B7/28 , G11B7/135

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