-
公开(公告)号：JP2000199872A
公开(公告)日：2000-07-18
申请号：JP37771298
申请日：1998-12-29
Applicant: SONY CORP
Inventor： DOKO TORU
IPC: G02B19/00 , G02B5/04 , G02B27/00 , G02B27/09 , G02B27/14 , G02F1/1335 , G02F1/13357
Abstract: PROBLEM TO BE SOLVED: To make it possible to reduce space coherence or to decrease speckles in spite of constitution which is compact and may be industrially mass produced. SOLUTION: This illumination device has a first reflection member 14 having plural reflection surfaces with respectively have angles of inclination of approximately 45 deg. with the optical axis of coherent incident light and are disposed to each other apart prescribed intervals in the optical axis direction of the incident light, a second reflection member 15 which respectively have angles of inclination of approximately 45 deg. with the optical axis of the reflected light by the first reflection member 14 and are disposed to each other apart prescribed intervals in the optical axis direction of the incident light and a lens array member 16 having plural lenses which are disposed within the plane approximately perpendicular to the optical axis of the reflected light by this second reflection member 15.
-
公开(公告)号：JPH10190123A
公开(公告)日：1998-07-21
申请号：JP34161996
申请日：1996-12-20
Applicant: SONY CORP
Inventor： DOKO TORU , TAMADA HITOSHI
Abstract: PROBLEM TO BE SOLVED: To easily control the reflectance at the end face of a resonator by forming a diffraction grating having a cyclic recessing and projecting structure on the end face of the resonator. SOLUTION: In a light emitting element 10, a semiconductor laser LD comprises a laminated semiconductor layer 12 formed by successively forming first and second clad layers on a semiconductor substrate 11. Both front ends of the layer 12 respectively contain the front and rear end faces 13A and 13B of a resonator so that a horizontal stripe-like resonator having a grating formed by etching may be composed of the laser LD. In addition, current blocking areas 14 are formed on both sides of the stripe-like area constituting the horizontal resonator. The grating constituting the end faces 13A and 13B of the resonator has a cyclic recessing and projecting structure which controls the reflectance and transmittance of the end faces 13A and 13B.
-
公开(公告)号：JPH09178943A
公开(公告)日：1997-07-11
申请号：JP35144895
申请日：1995-12-26
Applicant: SONY CORP
Inventor： TAMADA HITOSHI , YAMAGUCHI KYOJI , MATSUMOTO SHUICHI , DOKO TORU
Abstract: PROBLEM TO BE SOLVED: To obtain a polarizing optical element, which can be formed in a large grid cycle, having a low loss and a practically sufficient quenching ratio from a visible wave area to a near infrared wavelength area by satisfying specified conditions for a metal grid formed on a transparent board. SOLUTION: Concerning a non-resonant type wire grid polarized beam splitter, a metal grid 1 is formed from high reflection factor metal such as Al or Au or the combination of Al and Au. Its thickness is defined as (h), its width (value of h/2) is defined as (b), an angle formed from a bottom face and a side face at the time of approximating the cross section of grid with a trapezoid is defined as (s) and a grating cycle is defined as (d). Besides, the refraction factor of the board 2 is defined as n1 , the refraction factor between grids is defined as n2 , the refraction factor of upper part is defined as n3 and the wavelength to be used is defined as λ. These factors are set so as to satisfy the relation of n2 =n3 =1, 70 deg. 0.5 and b/d
-
公开(公告)号：JP2000012954A
公开(公告)日：2000-01-14
申请号：JP17330898
申请日：1998-06-19
Applicant: SONY CORP
Inventor： TAMADA HITOSHI , DOKO TORU
Abstract: PROBLEM TO BE SOLVED: To provide a semiconductor light emitting element, for which the reflectivity of the end faces of a resonator can be controlled easily and a method by which the light emitting element can be easily manufactured. SOLUTION: An irregularity structure, in which belt-like recessed sections extended in parallel with each other on the joint surfaces among semiconductor layers constituting a laser resonator 1, is provided on the end faces 2 and 3 of the resonator 1. The resonator 1 is constituted by successively laminating an n-type AlGaN clad layer 2, an n-type GaN optical waveguide layer 13, an InGaN active layer 14, a p-type GaN optical guide layer 15, and a p-type AlGaN clad layer 16 upon a substrate. The irregularity structure on the end faces 2 and 3 of the resonator 1 are formed by utilizing the composition difference among the semiconductor layers constituting the resonator by performing wet etching on the end faces 2 and 3, after the end faces 2 and 3 are formed by etching.
-
Patent Agency Ranking
公开(公告)号：JPH11337867A
公开(公告)日：1999-12-10
申请号：JP14545198
申请日：1998-05-27
Applicant: SONY CORP
Inventor： DOKO TORU
IPC: G02B27/09 , H01L21/027
Abstract: PROBLEM TO BE SOLVED: To provide a coherent light, which is uniform in a two-dimensional plane and has a coherence sufficiently reduced, by an optical device having a simple constitution. SOLUTION: Laser beam A and laser beam B are made incident on a prism 1 from different incidence faces and are propagated in different optical paths. With respect to each laser beam, it is branched into first transmission laser beam and first reflected laser beam by a partial reflection face 3, and the first reflected laser beam is reflected by a total reflection face 2 and is led to the partial reflection face 3 again and is branched into second transmission laser beam and second reflected laser beam, and first transmission laser beam and second transmission laser beam are emitted from the partial reflection face 3 with a certain optical path difference between them.
-
16.发明专利
公开(公告)号：JPH11326827A
公开(公告)日：1999-11-26
申请号：JP13782398
申请日：1998-05-20
Applicant: SONY CORP
Inventor： DOKO TORU
Abstract: PROBLEM TO BE SOLVED: To sufficiently reduce the coherence without giving optical path length differences larger than a coherence length to branched light beams by dividing a light beam oscillated with plural wavelengths different from one another into plural light beams and making plural light beams into a single luminous flux or an aggregate luminous flux after giving a fixed optical path length difference to plural light beams. SOLUTION: When a light beam A made incident on a prism 1 is inclined with respect to the mirror surface of a total reflection mirror 2 at, for example, θ/2+π/4, the reflected light beam is made incident on a semitransparent mirror 3 at an angle θ. Through 10% of the whole light quantity of the light beam is transmitted through by setting of the semitransparent mirror 3, 90% of the light quantity is reflected and reaches the total reflection mirror 2 again. The light beam reflected at the angle θ by the total reflection mirror 2 reaches the semitransparent mirror 3 again, and the light beam goes while repeating these reflection and transmission. Consequently, light beams having the optical path length difference added by 2d/cos θ are arranged and emitted when viewed from the upper face of the semitransparent mirror 3.
-
公开(公告)号：JPH1073722A
公开(公告)日：1998-03-17
申请号：JP23104896
申请日：1996-08-30
Applicant: SONY CORP
Inventor： TAMADA HITOSHI , DOKO TORU
IPC: G02B5/30 , G02F1/1335 , G11B7/135 , G11B11/10 , G11B11/105
Abstract: PROBLEM TO BE SOLVED: To provide a polarizing optical element excellent in environmental resistance and high in reliability and to unnecessitate an unstable etching process. SOLUTION: In the polarizing optical element separating incident light on a metallic grating 3 formed on a substrate 1 at prescribed intervals into transmitted light and reflected light corresponding to a polarization direction, the metallic grating 3 is formed on a ground film 2 and the bed film 2 is a transparent metallic oxide film 3d. The polarizing optical element is manufactured by a process for forming the ground film 2 made of a conductive metal on the substrate 1, a process for forming a resist pattern thereon by an electron beam drawing, a process for forming a metallic film with prescribed film thickness, a process for forming the metallic grating 3 by selectively removing the metallic film by a lift-off method and a process for oxidizing the ground film 2 by heat- treatment to make the film transparent and for forming an oxidized coating film 3a on a surface of the metallic grating 3.
-
公开(公告)号：JPH09288211A
公开(公告)日：1997-11-04
申请号：JP10144996
申请日：1996-04-23
Applicant: SONY CORP
Inventor： DOKO TORU
Abstract: PROBLEM TO BE SOLVED: To obtain a small-sized element which can be easily produced and can divide near infrared or visible rays according to polarization directions by specifying the period of a metal grating and the refractive indices of a substrate and the metal grating. SOLUTION: This polarizing optical element consists of an almost planer substrate 11 and a metal grating 12 formed on the substrate 11. This element has a function to separate light of wavelengths large than n0 ×d and smaller than n1 ×d into transmitted light and reflected flight according to its polarizing direction, wherein n1 is the refractive index of the substrate 11, n0 is the refractive index of a material which covers the top of the metal grating 12, and (d) is the grating period of the metal grating. For example, when the element is irradiated with polarized light of 780nm wavelength having the electric field component in the same direction as the grating vector of the metal grating 12, about 82% of the incident light is reflected while about 2.8% enters the substrate 11. As for polarized light having the electric field component in the perpendicular direction, about 1.5% of the incident light is reflected while about 80% of the light is made incident on the substrate 11.
-
公开(公告)号：JPH0635019A
公开(公告)日：1994-02-10
申请号：JP20704392
申请日：1992-07-13
Applicant: SONY CORP
Inventor： TAMADA HITOSHI , DOKO TORU , KIJIMA KOUICHIROU
Abstract: PURPOSE:To eliminate the need for applying an AR coating on the end face of an optical waveguide, to facilitate the miniaturization of the device and to facilitate a matching stage. CONSTITUTION:A semiconductor laser chip 1 generates a basic wave laser beam. An L-shaped fixing member 7 and an adhesive 8 fix and support a heat sink 3 and a KTP-SHG wavelength conversion element 6 by aligning the electric field direction of the semiconductor laser chip and the electric field direction of the Ta2O5 optical waveguide 4 in such a manner that the Ta2O5 optical waveguide 4 exists in proximity to the end face of the semiconductor laser chip 1. The basic wave laser beam is, therefore, guided to the Ta2O5 optical waveguide 4.
-
-
-
-
-
-
-
-
Search Results
19
records
(took 0.023 seconds)
