Patent
Diffuser plate and method for producing diffuser plate
TLDR
In this paper, a diffuser plate where a plurality of microlenses are placed on a principal surface, wherein a phase difference generation part is inserted between the plurality of macrolenses and the principal surface is presented.Abstract:
The present invention provides a diffuser plate and a method for producing a diffuser plate that can improve variations in luminance of transmitted light or reflected light in a simple structure and that enable easy design and production. The diffuser plate according to the present invention is a diffuser plate where a plurality of microlenses are placed on a principal surface, wherein a phase difference generation part is inserted between the plurality of microlenses and the principal surface, the plurality of microlenses have two or more types of lens shapes, and the number of microlenses having the two or more types of lens shapes is determined so that a quantity ratio of the two or more types of lens shapes is a specific value, each of the lens shape types is selected corresponding to each of coordinates on the principal surface in which centers of undersurfaces of the plurality of microlenses are placed, and an angle range in which the diffuse light intensity is substantially uniform is in a range of +10% to −10% of a desired angle range.read more
Citations
More filters
Patent
Augmented reality display system
TL;DR: In this paper, a transparent light field display device including a transparent substrate, an array of light-emitting picture elements formed on the transparent substrate and a sparse microlens array formed over the array of LEM elements was disclosed.
Patent
Lens array and image projection device
Koike Katsuhiro,Nomoto Takayuki +1 more
TL;DR: In this paper, the upper-level and lower-level microlenses of a microlens array 20 of a screen 2 are formed on the incidence surface of the screen 2, which have the same effective diameter and have a structure that generates an optical path length difference Δ in transmission light.
Patent
Microlens array diffusers
Olivier Ripoll,Blattner Peter +1 more
TL;DR: In this article, a microlens array diffuser is used to generate a substantially diffuse illumination, where each microlense has a respective periodicity-influencing characteristic and a respective surface profile.
Patent
Maskless exposure method, maskless exposure apparatus and method of manufacturing a semiconductor device using the same
TL;DR: In this article, a maskless exposure method is proposed to spatially modulate a light output from a light source into a pattern beam having a mask pattern, condensing the modulated pattern beam into a first group of spot beams having a first focal position on a Z-axis substantially perpendicular to an exposure surface of an object layer.
References
More filters
Patent
Structure screens for controlled spreading of light
TL;DR: In this article, a structure screen for the controlled spreading, diffusion, or scattering of an incident beam is presented, composed of microstructures whose configurations and distribution on the surfaces of the screen are precisely determined.
Journal ArticleDOI
Microlens-array-based exit-pupil expander for full-color displays
Hakan Urey,Karlton D. Powell +1 more
TL;DR: A dual-MLA-based EPE is demonstrated that produces excellent exit-pupil uniformity and better than 90% diffraction efficiency for all three wavelengths in a color-display system.
Patent
Head-up display device
TL;DR: In this paper, a head-up display device with a first light source unit, a first liquid crystal panel, a second liquid crystal layer, and a second polarizer is described.
Patent
Scanned-beam heads-up display and related systems and methods
TL;DR: A heads-up display that includes a scanner and a projection assembly was proposed in this article, where the scanner generates an image by sweeping a beam of electromagnetic energy, and the projection assembly directs the image into a predetermined viewing space having a region with a substantially uniform intensity profile.
Patent
Image forming apparatus and head-up display device
Kazuaki Fujii,一彰 藤井 +1 more
TL;DR: In this article, the authors propose an image forming system consisting of a laser projector, a microlens array, and an optical system correcting element, which corrects and projects a laser beam in such a way that the incident angle of the laser beam to be incident on each micro-lens 31 is fitted within the aperture angle of each micro lens 31.