公开(公告)号：US20170299955A1

公开(公告)日：2017-10-19

申请号：US15513498

申请日：2015-09-07

Applicant: HITACHI CHEMICAL COMPANY, LTD.

Inventor： Tomoto KAWAMURA ,  Toshihiro KURODA ,  Daichi SAKAI ,  Toshiyuki TAKAIWA ,  Yutaka KAWAKAMI ,  Toshiteru NAKAMURA

IPC: G03B21/20 ,  F21V8/00 ,  G02B27/01

CPC classification number: G03B21/208 ,  G02B6/0006 ,  G02B6/0008 ,  G02B27/0101 ,  G02B2027/0118 ,  G03B21/2013 ,  H04N9/00

Abstract: The purpose of the present disclosure is to provide a small optical integrator for increasing color mixing property and homogeneity. An optical integrator is provided with a light entrance surface and exit surface (002, 003), and side surfaces (004, 005, 006, 007) that connect the entrance surface and the exit surface, and is internally filled with a light guide material having a refractive index. The light guide material contains scattering particles for scattering light that have a refractive index different from the refractive index of the light guide material. The light that has entered via the entrance surface propagates from the entrance surface side toward the exit surface while being scattered by the scattering particles in the light guide material, wherein part of the scattered light is guided to the exit surface by propagating while being confined, by internal reflection on the side surfaces, in the light detector.

公开(公告)号：US20190004408A1

公开(公告)日：2019-01-03

申请号：US15781157

申请日：2017-02-02

Applicant: Hitachi Chemical Company, Ltd.

Inventor： Tomoto KAWAMURA ,  Toshiteru NAKAMURA ,  Seiji MURATA ,  Yoshiho SEO ,  Toshihiro KURODA ,  Yutaka KAWAKAMI ,  Daichi SAKAI ,  Toshiyuki TAKAIWA

IPC: G03B21/20 ,  H04N9/31 ,  F21V8/00

Abstract: An optical mixer efficiently homogenizes light flux emitted from a plurality of light sources emitting light having different wavelengths to provide a multi-wavelength homogeneous light source. The optical mixer has a columnar shape made of a transparent material, a length of the side surfaces is larger than an outermost diameter of a top surface or a bottom surface of the columnar shape, and a large number of scattering particles scattering light contained inside the optical mixer. The side surface of the optical mixer reflects light, and the top surface and the bottom surface thereof transmit light. Thereby, a function of mixing light incident from the top or bottom surface by the reflecting function of the side surface and the scattering function of the scattering particles is provided.

公开(公告)号：US20180203338A1

公开(公告)日：2018-07-19

申请号：US15742689

申请日：2015-12-11

Applicant: Hitachi Chemical Company, Ltd.

Inventor： Tomoto KAWAMURA ,  Seiji MURATA ,  Ryuji UKAI ,  Toshiyuki TAKAIWA ,  Toshihiro KURODA ,  Daichi SAKAI ,  Yutaka KAWAKAMI ,  Toshiteru NAKAMURA

IPC: G03B21/20 ,  G02B27/28 ,  G03B21/28

CPC classification number: G03B21/208 ,  G02B5/10 ,  G02B19/0028 ,  G02B19/0061 ,  G02B27/0172 ,  G02B27/0994 ,  G02B27/1006 ,  G02B27/283 ,  G03B21/2033 ,  G03B21/2073 ,  G03B21/28

Abstract: To provide an illumination device having high efficiency, an illumination method, a video projection apparatus using the same. In order to achieve the object, there is provided an illumination device configured to include a light source and a light condensing body which condenses light from the light source to be emitted, and the light condensing body includes an incidence surface of a light source side, an emission surface emitting light, and a side surface which is present between the incidence surface and the emission surface, the side surface is a curved surface of which a distance from a light axis in a direction orthogonal to the light emitting surface of the light source at the center of the light source becomes large from the incidence surface toward the emission surface and has a plurality of curved-surface-shapes of which shapes of the curved surfaces are different from each other. There is provided an illumination device configured to include a light source, a light integrator homogenizing light emitted from the light source through total internal reflection and filled with a transparent material, a lens converting light emitted from the light integrator into substantially parallel light, and a reflection parabolic surface converting light emitted from the light integrator into substantially parallel light and disposed on the outside of the lens, and a surface of the light integrator side of the lens is disposed on a side closer to a light integrator side than an end in the light axis direction of the lens which is located at a side opposite to the light integrator of the reflection parabolic surface.