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Manufacturing method of optical disk

A manufacturing method and technology for optical discs, which are applied in the manufacture of optical record carriers, optical record carriers, etc., can solve the problems of uneven image output signal and the like

Inactive Publication Date: 2008-08-13
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem that the image output signal of the charge-coupled camera (CCD camera) 203 is not uniform.

Method used

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  • Manufacturing method of optical disk
  • Manufacturing method of optical disk
  • Manufacturing method of optical disk

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Embodiment Construction

[0329] The following is based on Figure 8 to Figure 21 , the embodiment of the present invention will be described. At this time, with the attached figure 1 to attach Figure 7 Parts that are the same as those already explained are denoted by the same reference numerals, and description thereof will be omitted.

[0330] First, as per Figure 1 to Figure 7 As already described, using the Figure 1 to Figure 3 In the manufacturing apparatus shown as an example, two optical disc substrates 103, 104 (the first optical disc substrate 103 and the second optical disc substrate 104) are bonded together in the following steps. That is, as shown in FIG. 4 , the nozzle 108 is inserted between the two disc substrates 103 , 104 fixed on the turntables 101 , 102 , and its front end is located near the center of the first disc substrate 103 . In this state, an adhesive such as ultraviolet curable resin 120 is discharged from the nozzle 108 . In this manner, the step of discharging the...

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Abstract

In order to uniformly illuminate a whole inspection area while securing some work distance between an optical disk and an imaging unit. An inner peripheral side transparent region (inspection area 308) of a sticking type optical disk 122 is illuminated with a ring illumination 301 and imaged with the imaging unit 203 and spreading quality of an adhesive at the inspection area 308 is inspected. In such a case, each necessary member is set so that inequality of S2(1-LD / HD)S2(1+LD / HD) is satisfied in positional relation between an inspection area inner diameter S1, an inspection area outer diameter S2, an illuminating part inner diameter L1 of the ring illumination 301, an illuminating part outer diameter L2 of the ring illumination 301, distance LD between the ring illumination 301 and the optical disk 122, and distance HD between a first main point position H1 of the imaging unit 203 and the optical disk 122. Thereby, a shade of the ring illumination is not reflected in the inspection area, the whole inspection area 308 can be uniformly illuminated.

Description

[0001] This application is a divisional application of a Chinese patent application whose applicant is Ricoh Co., Ltd., whose application date is August 1, 2003, and whose application number is 03125561.2. technical field [0002] The present invention relates to an optical disc manufacturing method for a bonded optical disc formed by bonding two optical disc substrates. Background technique [0003] In general, optical discs such as digital video media (DVD media) are bonded type optical discs formed by bonding two optical disc substrates. That is, currently used digital video media discs are formed by bonding two disc substrates such as 0.6 mm thick, and the next generation of digital video media discs is expected to be bonded by two substrates with a thickness of 0.1 mm and 1.1 mm. formed together. [0004] For example, a technique for bonding two optical disc substrates is disclosed in Japanese Patent Application Laid-Open No. 05-20714 (Patent Document 1). Refer below ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/26
Inventor 青木慎司村山升宇佐美仁
Owner RICOH KK