Abstract:
A retardation film comprising a cellulose derivative and a plasticizer, wherein a total haze, Htotal, of the retardation film meets the following condition: 0.1%
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical element, capable of easily forming a fine unevenness structure extended in a direction crossing an optical axis on the optical surface of the optical element having an optical surface with a curvature.SOLUTION: A method for manufacturing a lens including an antireflection part having uneven shapes extended in a direction crossing the optical axis on a concave lens surface 1a comprises: a main body processing step of forming a lens body 1 with the concave lens surface 1a; a molding step of applying a molding resin on the concave lens surface 1a, pressing a fine structure forming mold 5 having a molding surface part 5a for transferring the antireflection part, formed on the surface of a deformable base part 5A to the concave lens surface 1a, and curing the molding resin; and a demolding step of gradually spacing the fine structure forming mold 5 in a direction in which the uneven shapes of the antireflection part extend, from the outer peripheral side thereof by working the moment of force about the surface top of the molding surface part 5a to deform the base part 5A, to remove the mold.
Abstract:
PROBLEM TO BE SOLVED: To provide a screen for projection which is capable of improving the reduction of contrast due to external light by eliminating the variation of brightness due to using a short-focus projector, and a projection system including the same.SOLUTION: The screen for projection includes: a reflecting layer as a reflecting layer having a plurality of reflection patterns spaced from each other, where each reflection pattern includes an image reflecting surface having a tilt angle to a horizontal direction so as to guide image light toward the front of the screen; and a plurality of external light absorbing layers which absorb external light impinging on the screen.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a polarizing beam splitter.SOLUTION: An exemplary method includes steps for: supporting a polarizing film in a mold where the polarizing film has a first surface and a second surface; injecting a polymeric material into the mold adjacent the first surface of the polarizing film; solidifying a first polymeric material to form a first prism; and securing a second prism to the second surface of the polarizing film. Another exemplary method includes steps for: injection-molding a component of the polarizing beam splitter; and heat-treating the first component before a temperature reaches temperature which is lower by about 20°C than a glass transition temperature of the first polymeric material.
Abstract:
PROBLEM TO BE SOLVED: To provide a vehicular indoor lighting lamp lens which makes dimensional control easy and has no risk of damaging a ceiling.SOLUTION: In a method of forming a mold for the indoor lighting lamp lens provided with a cavity formed in the shape of a lens 10 of which the entire surface becomes a styling design part, the lens 10 has a predetermined thickness and a rib 10B on the back surface, and a gate 50 is provided for the rib 10B and the thickness. A molten resin is injected into in the cavity of the mold from the gate 50. A cutting pin 60 of the same width with the width of the gate 50 is inserted into the gate 50 at the root of the rib 10B and the gate 50 after injection is completed to separate the rib 10B from the gate 50. The cutting pin 60 is made to retreat after the separation is completed to take the lens 10 out of the mold.