Asahi Kasei Kabushiki Kaisha

Asahi Kasei E-Materials Corporation

Masaru Sugiyama

Takashi Ono

Hiroyuki Sasaki

Naoki Inoue

Yasuyuki Kawazu

Masaharu Sugimura

Nao Kitamichi

To provide an image display device for enabling a polarization axis direction of a reflection type polarizing plate to be identified with simplicity and accuracy, and enabling an adjustment in the polarization reflection axis direction to be made with high accuracy, a wire grid polarizing plate for enabling the polarization axis direction to be examined simply, and the like, a head-up display device () in the present invention is an image display device provided with an image display () that outputs image light which is polarized light, a reflection type polarizing plate () having an reflecting surface () that reflects the image light, and a projection plate () onto which the image light reflected by the reflection type polarizing plate is projected, and is characterized in that the reflection type polarizing plate allows a bright line (B) as an indicator indicative of the polarization axis direction of the reflecting surface to be observed.

Image display device, wire grid polarizing plate, method of manufacturing plate, method of observing wire grid polarizing plate, and method of estimating polarization axis direction of wire grid polarizing plate

An object of the present invention is to provide a radiation temperature measuring device capable of preventing reduction in the accuracy of temperature measurement due to an electromagnetic wave reflected by a measurement target. A radiation temperature measuring device includes a reflective polarizing plate configured to reflect a polarized wave of one direction in an electromagnetic wave radiated from an object to be measured and transmit or absorb a polarized wave of a direction perpendicular to the one direction and an infrared sensor configured to detect the polarized electromagnetic wave of the one direction reflected by the reflective polarizing plate.

Radiation temperature measuring device

A wire grid polarizing plate () has a substrate () having a concavo-convex structure extending in a particular direction on its surface, and a conductive material () provided to be distributed on one side surface () of a convex portion () of the concavo-convex structure. Further, in the wire grid polarizing plate (), in a cross-sectional view in the perpendicular direction to the extension direction of the concavo-convex structure, a pitch Pthat is a distance between two adjacent convex portions () is set at 120 nm or less, and a convex-portion height (H) that is a difference in height between a highest portion () of the convex portion () and a lowest portion () of a concave portion () is set at 0.8 time to 1.3 time the pitch P. With the wire grid polarizing plate () in a liquid crystal display device, high image quality can be achieved.

Wire grid polarizing plate and projection type image display device

Growing community of inventors

Tokyo, Japan

Masaru Sugiyama