Optical element carrying printed substrate and optical head device using the substrate

• US 4,978,844 A
• Filed: 10/25/1989
• Issued: 12/18/1990
• Est. Priority Date: 07/31/1986
• Status: Expired due to Fees

• Current Assignee: Pioneer Electronics (USA) Incorporated (Pioneer Corporation)
• Original Assignee: Pioneer Electronics (USA) Incorporated (Pioneer Corporation)
• Inventors: Ujihara, Takashi
• Primary Examiner(s): Nelms, David C.
• Assistant Examiner(s): Allen, Stephone B.
• Application Number:
  US07/426,347
• Time in Patent Office: 419 Days
• Field of Search: 250/216, 250/239, 250/201 DF, 250/201.4, 250/201.5, 369/43-46, 369/112, 350/247
• US Class Current: 250/216
• CPC Class Codes: G11B 7/123 Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence

Abstract

A component package for the semiconductor laser and photodiodes of an audio or video disk recording and/or playback system includes a wiring substrate which provides electrical wiring to these components and in addition provides support for the same. The substrate is configured to include independently flexible fingers or the like, with the laser and the photodiodes being supported by different fingers. The substrate is itself supported within a package body which is filled with a protective gas. This arrangement allows the electro-optical elements to be provided in chip form without independent protective cases.

Claims

1. An optical head device, comprising;

a light-emitting element, an objective lens for converging light emitted from said light-emitting element onto a surface of an optical information recording medium, a light-receiving element for receiving light reflected from said surface and for generating an electrical signal in response thereto, and a holder mechanism for holding said light-emitting element and said light-receiving element, said holding mechanism including a package body provided with a partly open interior space and a cover for closing an opening portion of said interior space, said light-emitting element and said light receiving element being disposed within said interior space.

2. An optical head device according to claim 1, in which said package body further comprises means for supporting said objective lens.

3. An optical head device according to claim 1, wherein said interior space is filled with a protective gas.

4. An optical head device according to claim 1, further including means for varying relative positions of said light receiving element.

5. An optical head device according to claim 1, further including means for supporting said independent flexible portions comprising at least one positionally adjustable support element connectible to said package body.

6. An optical head device according claim 1, wherein said light receiving element and said light emitting element are provided in chip form and are packaged only by said package body.