BLANK OPTICAL DISCS ALL

Brand Owner (click to sort) Address Description
4M 4M Technologies Holding Avenue des Sports 42 1400 Yverdon-Les Bains Switzerland BLANK OPTICAL DISCS FOR ALL FORMATS OF RECORDABLE AND PRE-RECORDED DISCS, SOFTWARE CONTROLLING AND CHECKING THE MANUFACTURE PROCESS OF OPTICAL DISCS;MACHINES FOR THE MANUFACTURING OF OPTICAL DISCS SUCH AS CD-AUDIO, CD-ROM AND CD-VIDEO DISCS; MACHINE PARTS, NAMELY, MOULDS FOR THE MANUFACTURING OF OPTICAL DISCS SUCH AS CD-AUDIO, CD-ROM AND CD-VIDEO DISCS;4 M;
MODULINE MCL Multi Media Masters and Machinery S.A. 42, avenue des Sports YVERDON-LES-BAINS Switzerland blank optical discs for all formats of recordable and pre-recorded discs;machines for the manufacturing of optical discs such as CD-Audio, CD-ROM and CD-Video discs; machine parts, namely, moulds for the manufacturing of optical discs such as CD-Audio, CD-ROM and CD-Video discs;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. There is provided an objective lens for an optical pick-up which is used to record/reproduce data to/from at least three types of optical discs. Thicknesses t1, t2 and t3 of cover layers of first, second third optical discs are t1?0.6 mm, t2?0.6 mm, and t3?1.2 mm. Numerical apertures NA1, NA2 and NA3 for the first, second and third optical discs satisfy a relationship NA1?NA2>NA3. When the first optical disc is used, a substantially collimated light beam is incident on the objective lens. When the second or third optical disc is used, a diverging beam is incident on the objective lens. With regard to magnifications M1, M2 and M3 and focal lengths f1, f2 and f3 of the objective lens for the first, second and third optical discs, the following conditions (1), (2) and (3) are satisfied: