| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 369108000 | Color | 7 |
| 20090147655 | Miniaturized disc drive containing DVD-compatible optical controller - A miniature optical disc drive includes a DVD-compatible optical controller and a cartridge load module designed to hold a cartridge containing a 32 mm optical data storage disc. | 06-11-2009 |
| 20110249545 | Objective Lens and Optical Pickup Apparatus - An objective lens includes: a diffraction area having a diffraction structure provided thereon concentrically around an optical axis of the objective lens; and a first non-diffraction area provided outward an outer circumference of the diffraction area, the objective lens being configured to focus first laser light on a signal recording surface of a first optical recording medium by refraction in the first non-diffraction area; focus second laser light, different in wavelength from the first laser light, on a signal recording surface of a second optical recording medium by diffraction in the diffraction area; and focus third laser light, different in wavelength from the first laser light and the second laser light, on a signal recording surface of a third optical recording medium by diffraction in the diffraction area. | 10-13-2011 |
| 20120113789 | READ-ONLY OPTICAL RECORDING MEDIUM - [Object] To provide a durable read-only optical recording medium having less variances in characteristics of a metal reflective film due to a temporal change. | 05-10-2012 |
| 20120182850 | Optical Pickup Apparatus and Disc Apparatus Including the Same - An optical pickup apparatus includes at least: a light emitting element capable of emitting at least first wavelength light and second wavelength light; and a diffraction grating configured to split the first wavelength light into at least a first main beam and a first sub-beam and to split the second wavelength light into at least a second main beam and a second sub-beam, a following expression (1) being satisfied: | 07-19-2012 |
| 20130051208 | OPTICAL PICK-UP DEVICE AND OPTICAL COMPONENT FOR THE SAME - An optical component for an optical pick-up for converging a laser beam having a particular wavelength onto a recording layer of an optical disc. The optical component comprises a base material formed of a resin composition, an undercoating which is formed of three layers of thin films having a same main constituent and is formed on a top surface of the base material, and a functional thin film formed on a top surface of the undercoating. In this configuration, each of a first layer and a third layer of the undercoating is a thin film formed without introducing oxygen, and a second layer is a thin film formed while introducing oxygen. A film thickness of the undercoating falls within a range of 160 nm to 270 nm, and film thicknesses of the thin films constituting the undercoating are substantially equal to each other. | 02-28-2013 |
| 20130100792 | OBJECTIVE OPTICAL ELEMENT AND OPTICAL PICKUP DEVICE - Provided is an objective optical element which can appropriately correct degradation from spherical aberration upon fluctuation of a light source wavelength while maintaining light use efficiency, just by changing the magnification of the objective optical element, and which can record/reproduce information to/from different optical discs. Also provided is an optical pickup device using the objective optical element. When a light flux having two different wavelengths λ | 04-25-2013 |
| 20130107691 | OPTICAL PICKUP AND OPTICAL DISC DEVICE INCLUDING THE SAME | 05-02-2013 |
