摘要:
A light source unit relating to the present invention includes a light source element; an optical-waveguide-formed element in which an optical waveguide is formed; a prism for turning back a light flux emitted from the light source and guiding the light flux toward an incident end of the optical waveguide; and a coupling optical system formed on the prism or provided as a separated body from the prism, for coupling the light flux emitted from the light source onto the optical waveguide.
摘要:
An objective optical system according to the present invention is provided for use in an optical pickup apparatus for recording or reproducing information on an information recording surface of a first optical information recording medium using a first light flux emitted from a first light source. The objective optical system is provided with: a first lens with a positive refractive power including plastic; a second lens with a positive refractive power including plastic; and a first phase structure. A wavefront aberration change amount of the objective optical system when a wavelength of the first light flux changes, and a wavefront aberration change amount of the objective optical system when an ambient temperature of the objective optical system satisfy the predefined condition.
摘要:
An objective lens unit for use in an optical pickup device, includes: a first lens section; a first flange section positioned peripheral of the first lens section; and a support section which supports a second objective lens having a second lens section provided in parallel to the first lens section with an optical axis different from that of the first lens section, wherein the first lens section, the first flange section and the support section are integrally formed.
摘要:
The present invention provides a semiconductor light source module including: a semiconductor light source for emitting a light flux with a predefined wavelength; a SHG element for converting an incident light flux entering onto an incident end surface of the SHG element into an outgoing light flux having a different wavelength from the incident light flux; a light converging optical system for converging a light flux emitted from the semiconductor light source onto the incident end surface of the SHG element; a light receiving element for receiving a part of a light flux emitted from the SHG element; and a drive device for driving an optical element in the light converging optical system based on a light flux received by the light receiving element.
摘要:
An optical communication module includes a first light-receiving element with a receiving surface in which a light flux with a wavelength λ1 emitted from an end surface of an optical fiber enters; a light-emitting element for emitting a light flux with a wavelength λ2; and a first optical element arranged between the first light-receiving element and the light-emitting element, and the end surface of the optical fiber. The first optical element includes a first optical surface with a positive refractive power and a second optical surface having a diffractive structure. One of the first optical surface and the second optical surface is divided into at least a first optical functional surface and a second optical functional surface through a step difference.
摘要:
An objective optical system according to the present invention is provided for use in an optical pickup apparatus for recording or reproducing information on an information recording surface of a first optical information recording medium using a first light flux emitted from a first light source, and the objective system includes: a first lens with a positive reflective power including plastic; and a second lens with a positive refractive power including plastic. Opposite optical surfaces of the first lens are convex surfaces, and a refractive power of the first lens and a power of a whole system of the objective optical system satisfy the predefined condition.
摘要:
An semiconductor laser light source apparatus includes: a semiconductor laser oscillator for emitting a laser beam; and a lens for transmitting the laser beam emitted by the semiconductor laser oscillator, wherein the lens comprises a light transparent material in which microparticles are dispersed into a plastic resin and have a size of the transmitting laser beam wavelength or below.
摘要:
An objective optical element of an optical pickup apparatus has a magnification m1 satisfying the following formula for a light flux of the wavelength λ1:−1/7≦m1≦−1/25 and |m1 |
摘要翻译:光学拾取装置的物镜光学元件具有对于波长λ1:-1/7 <= m 1 <= - 1/25和| m 1 | <| M 1的光束满足下式的放大率m1 其中M 1是从第一光源到波长λ1的光通量的第一光学信息记录介质的光学系统倍率。 物镜光学元件包括公共区域和专用区域。 专有区域包括具有抑制由于大气温度升高引起的球面像差增加的功能的专属衍射结构。 波长λ2的光通量。 已经通过专用衍射结构的光轴与形成在第二光学信息记录介质的信息记录平面上的会聚光点的位置不同的位置相交。
摘要:
An objective lens unit, includes: an objective lens for irradiating and converging laser light on an optical disc as an a light information recording medium; and a lens frame for retaining the objective lens, wherein the lens frame is structured so that at least a portion closer to a rotation center of the optical disc is offset to an inner side of the lens frame with regards to a virtual edge section closer to the rotation center of the optical disc, wherein the virtual edge section is in a nodal line of a virtual plane that includes an end face which is closest to the optical disc in the lens frame and the objective lens, and that is perpendicular to an optical axis and a virtual rotation curved surface that is obtained when a virtual straight line passing a portion which is farthest from the optical axis in the lens frame and the objective lens, in parallel with the optical axis, is rotated around the optical axis as a center axis.
摘要:
A projection optical system that performs enlargement projection of an image on a display device surface formed of a plurality of pixels onto a screen surface, in which pixel shift by less than a pixel pitch is performed on the screen surface in a vertical direction, a horizontal direction, an oblique direction, or a vertical and horizontal directions, and in which conditional formulae (1) and (2) below are fulfilled over the entire image range: (1)|ΔΔRG|≦0.5 d and (2)|ΔBG|≦0.5 d, where d represents the amount of pixel shift (>0), ΔRG represents lateral chromatic aberration in the direction of pixel shift of colored light R having a wavelength of 640 nm with respect to colored light G having a wavelength of 546 nm, and ΔBG represents lateral chromatic aberration in the direction of pixel shift of colored light B having a wavelength of 450 nm with respect to the colored light G having a wavelength of 546 nm.