摘要:
An optical pickup apparatus which conducts reproducing and/or recording information for a first optical information recording medium by using a light flux having a wavelength λ1 (350≦λ1 (nm)≦480) and a second optical information recording medium. The optical pickup apparatus comprises an output angle conversion element which is a fixedly arranged single lens which can convert an output angle of the first light flux and the second light flux. The optical detector equipped in the optical pickup apparatus can receive both of the first light flux and the second light flux. And, both optical surfaces of the output angle conversion element are refractive surfaces.
摘要:
An optical pickup apparatus which conducts reproducing and/or recording information for a first optical information recording medium by using a light flux having a wavelength λ1 (350≦λ1 (nm)≦480) and a second optical information recording medium. The optical pickup apparatus comprises an output angle conversion element which is a fixedly arranged single lens which can convert an output angle of the first light flux and the second light flux. The optical detector equipped in the optical pickup apparatus can receive both of the first light flux and the second light flux. And, both optical surfaces of the output angle conversion element are refractive surfaces.
摘要:
The present invention provides a compound optical element for an optical pickup apparatus, including: an aspherical lens and a resin layer arranged on at least one optical surface of the aspherical lens and having a phase structure, wherein the compound optical element satisfies a predetermined condition for optical path lengths of a light flux which passes the resin layer. The present invention also provides a compound optical element for an optical pickup apparatus including: a first lens part with a predefined Abbe number; a second lens part with a predefined Abbe number laminated on the first lens part and a phase structure formed on a boundary between the first lens part and air.
摘要:
An optical pickup apparatus includes: a first light source for emitting a first light flux with a wavelength λ1 for recording and/or reproducing information on a first optical disc having a protective substrate with a thickness t1; a third light source for emitting a third light flux with a wavelength λ3 for recording and/or reproducing information on a third optical disc having a protective substrate with a thickness t3; and an objective lens arranged in a common optical path of the first light flux and the third light flux when the optical pickup apparatus records and/or reproduces information on each of the first and third optical discs, wherein the first light flux enters into the objective lens as a converging light flux, and a magnification m3 of the objective lens for a third light flux satisfies − 1/10≦m3
摘要:
An optical pickup device includes a light source emitting a light beam having a wavelength within a range of 390 nm to 420 nm and an optical element to perform recording and/or reproducing of information of an optical disk having a protective substrate thickness d1 mm using the first light beam from the first light source, wherein the optical element is made of a mixed material produced by dispersing particles into a resin, a sign of a refractive index change Δn2/Δt of the particles owing to a temperature change is opposite to a sign of a refractive index change Δn1/Δt of the resin owing to a temperature change, or an absolute value of the refractive index change Δn2/Δt is smaller than an absolute value of the refractive index change Δn1/Δt.
摘要:
An optical pickup device includes a light source emitting a light beam having a wavelength within a range of 390 nm to 420 nm and an optical element to perform recording and/or reproducing of information of an optical disk having a protective substrate thickness d1 mm using the first light beam from the first light source, wherein the optical element is made of a mixed material produced by dispersing particles into a resin, a sign of a refractive index change Δn2/Δt of the particles owing to a temperature change is opposite to a sign of a refractive index change Δn1/Δt of the resin owing to a temperature change, or an absolute value of the refractive index change Δn2/Δt is smaller than an absolute value of the refractive index change Δn1/Δt.
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:
An optical pickup apparatus 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 unit having a first optical path difference providing structure and a second optical path difference providing structure. Magnifications of the objective optical unit for the first-third light fluxes have almost same value. The first optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be one of under-correction and over-correction for all of the first light flux, the second light flux, and the third light flux. The second optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be the other of under-correction and over-correction of the spherical aberration only for the second light flux.
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 optical element for use in an optical pickup apparatus, includes an objective lens to converge the light flux emitted from the first and second light sources; and an optical functional surface including a common region and an exclusive region. When a first optical information medium is used, a sine condition unsatisfied-amount whose value is maximum exists on the common region. The following formula is satisfied: 0.5≦COMA2/COMA1≦1.0 where COMA1 is a coma aberration (λ1 rms) when a light flux goes slantingly to be incident with a view angle of 1° onto the objective optical element when the first optical information medium is used, and COMA2 is a coma aberration (λ2 rms) when a light flux goes slantingly to be incident with a view angle of 1° onto the objective optical element when the second optical information medium is used.