Minolta Company, Ltd.

Konica Minolta, Inc.

Konica Minolta Opto, Inc.

Miyuki Teramoto

Takuji Hatano

Koji Takahara

Koujirou Sekine

Yasumasa Sawai

Shinji Maruyama

Mitsuru Yokoyama

Naoki Nishida

Kyu Takada

Hiroshi Hirayama

Tsuyoshi Iwamoto

Masahiro Terada

Tomokazu Taguchi

Yoshihiro Nakano

Iwao Usui

Masaru Okumura

Katsuya Fukatani

A projection lens for projecting an image onto a projection plane includes: a lens substrate; and an antireflective film disposed on a surface of the lens substrate. The antireflective film includes, in order starting from an air side of the antireflective film, a first layer, second layer, third layer, fourth layer, fifth layer, sixth layer, seventh layer, and eighth layer. The first layer is formed of MgF. Each of the second layer, the fourth layer, the sixth layer, and the eighth layer has a refractive index of 2.0 to 2.3. Each of the third layer, the fifth layer, and the seventh layer is formed of SiO.

Projection lens

A projection lens included in a projector using laser beams as a light source is provided, the laser beams including as the light source, first blue laser light beams, second blue laser beams, first green laser beams, second green laser beams, first red laser beams, and second red laser beams, which are different in wavelength range. The projection lens has a relative maximum value of a transmittance on an optical axis between a wavelength not shorter than 645 nm and a wavelength not longer than 680 nm.

Projection lens and projector with laser beam light source

A prism unit that combines light in the three primary colors of R, G, and B on the same optical axis includes: a G-reflecting dichroic coating that reflects G light and passes R and B light; and an RB dichroic coating that reflects one of R and B, and passes the other one of R and B, the prism unit satisfying the following conditional expression: &#x3bb;rg&#x2267;&#x3bb;rb&#x2267;0.67&#xd7;&#x3bb;rg+0.33&#xd7;&#x3bb;gb, where &#x3bb;gb represents the wavelength at which the transmittance is 50% when the colors of G and B on the composite optical axis are combined, &#x3bb;rg represents the wavelength at which the transmittance is 50% when the colors of R and G on the composite optical axis are combined, and &#x3bb;rb represents the wavelength at which the transmittance is 50% when the colors of R and B on the composite optical axis are combined.

Prism unit and projector

A monitor optical device has a first region and a second region. The first region transmits part of light beam emitted from a light source to introduce the transmitted light beam to a monitor device. The second region reflects the remainder of the light beam to introduce the reflected light beam to an optical disk. The first region is formed at least within the second region.

Optical device for monitor and optical pickup apparatus

An optical element has a dichroic film held between transparent materials which transmits one of first light in a wavelength range of 390 to 425 nm and second light in a wavelength range of 630 to 820 nm and reflects the other light, and a first, a second, a third and a fourth surfaces. In the optical element, a first anti-reflection film for preventing reflection of the first light is formed on the first surface, a second anti-reflection film for preventing reflection of the second light is formed on the second surface, and a third anti-reflection film for preventing the reflection of the first and the second light is formed on the third surface from which the incident light of the first surface and the second surface is emitted. In the third anti-reflection film, reflectance of the second light is larger than that of the first light.

Optical element and optical pickup device

On a waveguideformed on a substrate, a plurality of comblike shaped electrodesthat generate surface acoustic wavesfrom different directions are provided. And a periodic refractive indices portionis formed, where the refractive indices are periodically distributed in accordance with the wavelengths of the surface acoustic wavesgenerated by applying a voltage to the comblike shaped electrodes. And by changing a frequency of the applying voltage for sequentially changing the wavelengths of the surface acoustic wavesthe exiting direction of the light exiting from the periodic refractive indices portionis scanned. This makes it possible to provide an optical functional device and an optical scanning apparatus that perform light scanning less costly but at a high speed, and that can secure a wide scanning angle.

Optical functional device and optical integrated device

Disclosed herein is an optical switch for changing over a running direction of a light passing through an optical waveguide between a first direction and a second direction by moving a switching member disposed on an optical path of an optical waveguide. The switching member has a plurality of switching positions for selectively guiding each of lights of at least two different wavelengths into the first direction or second direction.

Optical switch using an optical waveguide

An optical waveguide is produced by forming on a substrate a waveguide layer and/or a clad layer containing, as their main ingredient, polyimide with a fluorine substitution rate of 30% or higher (thus as a fluorinated polyimide layer), with a primer layer laid in between that contains, as its main ingredient, polyimide with a fluorine substitution rate of 10% or lower (including 0%). This improves adherence of the fluorinated polyimide layer to the substrate and prevents the fluorinated polyimide layer from peeling off the substrate. For more effective prevention of such peeling-off and of warping of the substrate, the primer layer is preferably formed to have a thickness of 0.1 to 20 &mgr;m. The primer layer may contain a coupling agent.

Polyimide optical waveguide

An optical module has a substrate, a waveguide, formed on the substrate, for guiding light, and a photonic crystal portion that has media having different refractive indices arranged in a periodic pattern and that is disposed in a channel of the waveguide on the substrate. Here, the photonic crystal and the substrate are integrally formed. The formation comprises the steps of forming an aluminum film on the top of a conductive substrate, forming a protective film on the aluminum film, removing the protective film from a predetermined area to form a window over the predetermined area, anodizing the aluminum film exposed through the window to form photonic crystals, removing the protective film, cladding the bottom of the substrate and forming a core layer over the cladded bottom.

Optical module and manufacturing method thereof

The object of the present invention is, in a solar battery where at least an electrolyte and a porous member of an oxide semiconductor retaining a pigment material are provided between a transparent electrode and a counter electrode, to obtain a high conversion efficiency by improving the contact between the transparent electrode and the porous member of the oxide semiconductor. In order to achieve the above-mentioned object, in the solar battery according to the present invention where at least the electrolyte 6 and the porous member 3 of an oxide semiconductor retaining pigment material are provided between the transparent electrode 1 and the counter electrode 5, a finely-formed film 8 made of the same oxide semiconductor as the porous member 3 is further provided between the transparent electrode 1 and the porous member 3 of the oxide semiconductor.

Growing community of inventors

Osakasayama, Japan

Miyuki Teramoto