| Patent application number | Description | Published |
|---|
| 20080285424 | Optical pickup apparatus - An optical pickup apparatus is provided for recording and/or reproducing information on an optical disc in which information can be recorded at recording positions. The optical pickup apparatus includes: a light source; a relay optical system; an objective lens for converging a light flux onto one of the plurality of recording positions; a photodetector for receiving a light flux from the optical disc; a detector; a first actuator; and a second actuator. The detector is provided for detecting information for keeping a distance between the optical disc and the objective lens a predetermined value. The first actuator is provided for driving the objective lens for keeping the distance between the optical disc and the objective lens the predetermined value. The second actuator is provided for driving the relay optical system corresponding to one of the plurality of recording positions where information is recorded and/or reproduced. | 11-20-2008 |
| 20090115082 | Method of producing a lens - A method of producing a lens that includes shifting a first die relative to a second die, and pressing an optical material shaped in a preliminary form between the first die and the second die so as to form a lens having a configuration corresponding to a hollow portion formed by the first die and the second die while shifting the first die relative to the second die. The produced lens includes an effective optical surface configured to converge a light flux. The effective optical surface includes a light entrance side, a light exit side, and an optical axis. The effective optical surface is a convex surface shaped such that when a maximum normal line angle is defined as an angle formed between the optical axis and a normal line at the outermost circumference of the effective optical surface, the maximum normal angle is 60° to 90°. | 05-07-2009 |
| 20090190450 | OPTICAL ELEMENT, ABERRATION CORRECTING ELEMENT, LIGHT CONVERGING ELEMENT, OBJECTIVE OPTICAL SYSTEM, OPTICAL PICKUP DEVICE, AND OPTICAL INFORMATION RECORDING REPRODUCING DEVICE - An optical system for use in an optical pickup apparatus comprises a first optical surface having a superposition type diffractive structure including a plurality of ring-shaped zones which are formed concentrically around an optical axis, wherein each ring-shaped zone is composed of a plurality of stepped sections stepwise, and a second optical surface having a diffractive structure including a plurality of ring-shaped zones which are formed concentrically around an optical axis, wherein each of the plurality of ring-shaped zones are divided by a stepped section to generate a diffractive light ray of diffractive order whose absolute value is not small than 1 for the light flux. | 07-30-2009 |
| 20100182709 | Mirror Structure - To provide a mirror structure capable of reflecting incident light with good efficiency and is excellent in reliability. In a mirror structure which is used under an environment that the maximum irradiance of incident light is 5 kW/m | 07-22-2010 |
| 20100243032 | Sunlight Collecting System - Provided is a highly reliable solar collecting system. Since a concave minor has a reflection film on a base material on the side opposite to the side of a solar light incoming surface, peeling, breaking and the like are suppressed by protecting the reflection film by the base material, even when a dropping material is brought into contact with the side of the reflection film with impact or accumulated dropped materials are periodically cleaned. As an elliptical mirror has a reflection film on the base material on the side of the solar light incoming surface, even when solar light having large energy enters, the solar light is reflected by the reflection surface before reaching the base material and there is a small possibility of having the base material heated. | 09-30-2010 |
| 20100245991 | Film Mirror Having Ultraviolet Ray Reflection Film - Disclosed is a film mirror used for reflection of sunlight, which includes, in the following order from the side where sunlight is entered, an ultraviolet ray reflection film which reflects ultraviolet ray and transmits visible and infrared light, a plastic film layer, a metal reflection-layer which reflects visible and infrared light, and a protective layer. | 09-30-2010 |
| 20100258187 | Optical Element - An optical element for reflecting solar light has excellent weather resistance, and furthermore, a high reflectance in a wide band. When solar light enters an optical element (OE), light (L | 10-14-2010 |
| 20100284262 | OPTICAL PICKUP APPARATUS, OBJECTIVE OPTICAL ELEMENT AND OPTICAL INFORMATION RECORDING REPRODUCING APPARATUS - An optical pickup apparatus according to the present invention includes: a first light source for emitting a first light flux; a second light source for emitting a second light flux; a third light source for emitting-a third light flux; and an objective optical element. The objective optical element has an optical surface including at least two areas provided with optical path difference providing structures. The objective optical element converges the first to third light fluxes each passing through the predetermined areas on the objective optical element onto respective information recording surfaces of the first to third optical disks. The optical pickup apparatus provides a wavelength dependency of a spherical aberration so as to correct a change in a spherical aberration due to a refractive index change with a temperature change of the objective optical element. | 11-11-2010 |
| 20110110216 | Optical Element, Aberration Correcting Element, Light Converging Element, Objective Optical System, Optical Pickup Device, and Optical Information Recording Reproducing Device - An optical system for use in an optical pickup apparatus comprises a first optical surface having a superposition type diffractive structure including a plurality of ring-shaped zones which are formed concentrically around an optical axis, wherein each ring-shaped zone is composed of a plurality of stepped sections stepwise, and a second optical surface having a diffractive structure including a plurality of ring-shaped zones which are formed concentrically around an optical axis, wherein each of the plurality of ring-shaped zones are divided by a stepped section to generate a diffractive light ray of diffractive order whose absolute value is not small than 1 for the light flux. | 05-12-2011 |
