Apparatus for testing matrixes

• US 5,579,113 A
• Filed: 03/10/1995
• Issued: 11/26/1996
• Est. Priority Date: 03/15/1994
• Status: Expired due to Fees

• Current Assignee: KDG Mediatech AG
• Original Assignee: Koch Digitaldisk Gesellschaft M.B.H. & Co. Kg.
• Inventors: Schiffer, Klaus, Papst, Gerhard
• Primary Examiner(s): Gonzalez, Frank
• Assistant Examiner(s): VIERRA EISENBERG, JASON D
• Application Number:
  US08/402,516
• Time in Patent Office: 627 Days
• Field of Search: 369/53, 369/54, 369/58, 356/244, 356/426
• US Class Current: 356/426
• CPC Class Codes: G11B 23/0057 Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure for record carriers with directly readable mechanical information G11B3/685; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture
• CPC Class Codes: G11B 3/685 Intermediate mediums
• CPC Class Codes: G11B 7/26 Apparatus or processes specially adapted for the manufacture of record carriers

Abstract

Apparatus for testing matrixes for manufacturing optical storage media, with a holding device for the matrix displaceable in a rotary manner and an opto-electronic sensing system for reading the data stored on the matrix, where between the matrix (3) and the sensing system (4) a cover (6) configured as a rigid, transparent plate moved together with the holding device (2) and the matrix (3) is provided.

Claims

1. Apparatus for testing matrixes for manufacturing optical storage media, with a rotatable holding device for holding a matrix and with an opto-electronic sensing system for reading data stored on the matrix, characterised in that between the matrix and the sensing system a cover configured as a rigid, transparent disk rotating together with the holding device and the matrix is provided, said cover being separate from said matrix and said matrix being held in a plane condition by said holding device and said cover.

2. Apparatus according to claim 1, characterised in that the cover is a self-supporting component separate from the matrix.

3. Apparatus according to claim 1, characterised in that the cover is made of glass.

4. Apparatus according to claim 1, characterised in that the cover is anti-reflection coated at least on one side.

5. Apparatus according to claim 1, characterised in that the cover is connected firmly to the holding device and holds the matrix flat.

6. Apparatus according to claim 1, characterised in that the holding device is provided with a lower part surrounding the transparent cover and an upper part releasably connected thereto, wherein the matrix is held between the upper part and lower part in a clamped manner.

7. Apparatus according to claim 6, characterised in that the upper part is provided with a handle.

8. Apparatus according to claim 1, characterised in that spacers are arranged between the matrix and cover, so that an area of the matrix containing data does not lie on the cover.

9. Apparatus according to claim 8, characterised in that at least one spacer, preferably annular when viewed from above, is arranged respectively radially inside and radially outside said area of the matrix containing data.

10. Apparatus according to claim 9, characterised in that at least one spacer is profiled with a U-Shaped cross-section and engages a free outer edge of said cover.

11. Apparatus according to claim 9, characterised in that at least one spacer is composed of soft elastic or elastic rubber material.

12. Apparatus according to claim 9, characterised in that at least one spacer is configured as a seal.

13. Apparatus according to claim 1, characterised in that said data stored on the matrix are arranged hermetically sealed from the environment in the holding device surrounding the cover, wherein said data stored on the matrix is readable through the transparent cover.

14. Apparatus according to claim 13, characterized in that at least one spacer is configured as a seal.

15. Apparatus according to claim 1 for matrixes without a central hole, characterised in that in the holding device is provided with a lower part with a plate-like transparent cover having spacers upon which the matrix is laid, wherein an upper part of said holding device mounted only by gravity is laid on the matrix to secure the matrix between the upper part and the lower part.

16. Apparatus for testing matrixes for manufacturing optical storage media, with a rotatable holding device for holding a matrix and with an opto-electronic sensing system for reading signals stored on the matrix, characterised in that the matrix is held between two parts of the holding device releasably connected to one another, wherein both of said two parts are connected to one another by means of a one-handedly operable rapid fastener.

17. Apparatus according to claim 16, characterised in that the rapid fastener is provided in at least one part of said two parts with a spring-tensioned, hand operable press button, which allows release of the two parts when said press button is in a pressed state.

18. Apparatus according to claim 17, characterised in that the press button is effectively linked to a latching element which when said two parts are assembled holds said two parts together in a clamped manner, and pressing of the press button unlatches the latching element.

19. Apparatus according to claim 16, characterised in that the rapid fastener is provided in a first part of said two parts, and is provided with at least one spring-tensioned latching element, which when said two parts are assembled holds said two parts together in a clamped manner by means of an inclined surface on a second part of said two parts.

20. Apparatus according to claim 19, characterized in that the press button is effectively linked to the latching element and pressing of the press button unlatches the latching element.

21. Apparatus according to claim 16, characterised in that the holding device surrounds a rigid, transparent cover for the matrix.

22. A process for aligning a matrix without a central hole on an apparatus for testing the matrix for manufacturing optical storage media, said apparatus for testing the matrix comprising;

an opto-electronic sensing system for reading data stored on the matrix, a rotatable holding device having a lower part and an upper part between which said matrix is held, said lower part being positioned between the matrix and the sensing system, said lower part including a plate-like transparent cover having spacers thereon for supporting the matrix, said cover being configured as a disk rotating together with the holding device and the matrix, said cover being separate from said matrix and said matrix being held in a plane condition by said holding device and said cover, wherein said upper part of said holding device is laid on said matrix and mounted to said lower part only by gravity, said process comprising;

pushing, by hand, the matrix onto the lower part while observing data tracks on said matrix enlarged on a screen; and

mounting said upper part to said lower part when said data tracks run centrically on said screen.

23. A process for aligning a matrix without a central hole on an apparatus for testing the matrix for manufacturing optical storage media, said apparatus for testing the matrix comprising;

an opto-electronic sensing system for reading data stored on the matrix, a rotatable holding device having a lower part and an upper part between which said matrix is held, said lower part being positioned between the matrix and the sensing system, said lower part including a plate-like transparent cover having spacers thereon for supporting the matrix, said cover being configured as a disk rotating together with the holding device and the matrix, said cover being separate from said matrix and said matrix being held in a plane condition by said holding device and said cover, wherein said upper part of said holding device is laid on said matrix and mounted to said lower part only by gravity, said process comprising;

laying said matrix on said lower part, by hand, in a roughly centered position;

mounting said upper part to said lower part; and

aligning said lower part in two spatial directions perpendicularly with respect to an axis of rotation of said holding device until said matrix is centered in said holding device.