摘要:
The invention provides a technology suited to suppress decrease in the brightness of an image while preventing reduction in the contrast of the image caused by external light coming from the outside (from the viewer side of the image) of a screen. An image display surface (screen) of a projection type display device is provided with a front protective sheet including an optical filter member for absorbing specific wavelengths in the external light, especially among peak wavelengths of a three-wavelength fluorescent lamp. Moreover, LED's of three colors are used as a light source for forming an image. At least one of these LED's emits a light of a different wavelength from a peak wavelength that the front protective sheet absorbs. By this configuration, it is possible to prevent reduction in the contrast of an image caused by external light without decreasing the brightness of the image display device.
摘要:
There is provided A method for producing an optical device by bonding optical elements each other without using adhesive wherein the optical elements are bonded each other by using optical elements in which the relation between linear expansion coefficients &agr;1 and &agr;2 (/° C.) of each of the optical elements to be bonded and thickness t2 (m) of one of the optical elements satisfies the following formula: |(&agr;1−&agr;2)×t2|≦10−9 and t2≧2×10−5; and/or, by sticking the optical elements each other in the state of being heated, and then subjecting them to a heat treatment. There can be provided a small size and highly reliable optical devise by bonding optical elements each other without using an adhesive at a low cost.
摘要:
An enlarging unit comprises a concave Fresnel lens warped convexly toward an image forming unit side, the image forming unit is held between a light transmissible support plate warped convexly toward the image forming unit side and the enlarging unit warped convexly toward the image forming unit side, and peripheries of the support plate and the enlarging unit are fixed or semi-fixed. Thereby, deformation caused when the incident side and emission side micro-lens arrays are molded and deformation due to environmental temperature and humidity change are corrected, and both components are always maintained in close contact.
摘要:
In a description and drawings of the present application disclosed are, as the invention, (1) a projector for projecting an optimum image face having a convex configuration at a side of the projector, (2) a projecting system provided with the projector and a translucent screen with a substantially spherical configuration on which an image from the projector is formed, (3) a system for sensation provided with the projecting system, a seat at which a viewer is seated, a motion drive device for displacing the seat, a motion control device for controlling operation of the motion drive device, and an image control device for controlling an image projected by the projector while instructing the motion drive device to displace the seat in accordance with a change in the image, and (4) a method of manufacturing a screen provided with a light diffusing layer forming step of warming and softening a transparent thermoplastic resin sheet including a particle of a light diffusion material and pressing a light transmitting layer with a convex configuration against the thermoplastic resin sheet to closely fix thereto.
摘要:
Disclosed herein is a dry etching method for a work layer formed over a substrate, including the steps of forming a hard mask layer over the work layer formed over the substrate, forming a resist pattern over the hard mask layer, transferring the resist pattern to the hard mask layer by first dry etching conducted using the resist pattern, and patterning the work layer by second dry etching conducted using a hard mask pattern obtained upon the transfer to the hard mask layer, wherein after the hard mask layer is patterned by the first dry etching, the patterning of the work layer by the second dry etching is conducted through changing the concentration of an auxiliary ingredient of a dry etching gas, without changing a main ingredient of the dry etching gas, in an etching apparatus in which the first dry etching has been conducted.
摘要:
In the chromium-containing material film of the present invention, an element is added thereto and is capable of bringing a mixture of the element and the chromium into a liquid phase at a temperature of 400° C. or lower. The use of such a chromium-containing material film as an optical film (e.g., a light-shielding film, an etching mask film, or an etching stopper film) of a photo mask blank can achieve an improvement in chlorine-dry etching while retaining the same optical characteristics and the like as those of the conventional chromium-containing material film, thereby increasing the patterning precision.
摘要:
In the chromium-containing material film of the present invention, an element is added thereto and is capable of bringing a mixture of the element and the chromium into a liquid phase at a temperature of 400° C. or lower. The use of such a chromium-containing material film as an optical film (e.g., a light-shielding film, an etching mask film, or an etching stopper film) of a photo mask blank can achieve an improvement in chlorine-dry etching while retaining the same optical characteristics and the like as those of the conventional chromium-containing material film, thereby increasing the patterning precision.
摘要:
A photomask blank comprises a transparent substrate, a light-shielding film of an optionally transition metal-containing silicon material, and an etching mask film of a chromium compound base material. The etching mask film consists of multiple layers of different composition which are deposited by reactive sputtering, the multiple layers including, in combination, a first layer of a material which imparts a compression stress when deposited on the substrate as a single composition layer and a second layer of a material which imparts a tensile stress when deposited on the substrate as a single composition layer.
摘要:
A photomask blank comprises a transparent substrate, a light-shielding film deposited on the substrate and comprising a metal or metal compound susceptible to fluorine dry etching, and an etching mask film deposited on the light-shielding film and comprising another metal or metal compound resistant to fluorine dry etching. When the light-shielding film is dry etched to form a pattern, pattern size variation arising from pattern density dependency is reduced, so that a photomask is produced at a high accuracy.
摘要:
Disclosed herein is a dry etching method for a work layer formed over a substrate, including the steps of forming a hard mask layer over the work layer formed over the substrate, forming a resist pattern over the hard mask layer, transferring the resist pattern to the hard mask layer by first dry etching conducted using the resist pattern, and patterning the work layer by second dry etching conducted using a hard mask pattern obtained upon the transfer to the hard mask layer, wherein after the hard mask layer is patterned by the first dry etching, the patterning of the work layer by the second dry etching is conducted through changing the concentration of an auxiliary ingredient of a dry etching gas, without changing a main ingredient of the dry etching gas, in an etching apparatus in which the first dry etching has been conducted.