| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 359574000 | With curved or geometrically shaped corrugation | 7 |
| 20090147362 | IMAGE DISPLAY APPARATUS - The image display apparatus includes an image-forming element, an optical system guiding light from the image-forming element to an exit pupil, and a diffractive optical element disposed between the image-forming element and the optical system or between the optical system and the exit pupil. The diffractive optical element includes plural diffraction grating portions formed of mutually different materials. Each of the diffraction grating portions includes plural grating rings each having a grating surface and a grating side surface. In each of the grating rings, the grating side surface is inclined oppositely to the grating surface with respect to a normal to an enveloping surface passing through apexes of the plural grating rings. The diffractive optical element satisfies the following conditions at least when k=k | 06-11-2009 |
| 20100091370 | RADIAL BRAGG RING RESONATOR STRUCTURE WITH HIGH QUALITY FACTOR - A high quality factor optical resonator structure includes a substrate, a center disc formed on the substrate, and a plurality of concentric grating rings surrounding the center disc. The concentric rings are spaced apart from the center disc and from one another by regions of lower index of refraction material with respect thereto, and wherein spacing between the grating rings and the center disc is non-periodic such that a magnitude of a displacement distance of a given grating ring with respect to a λ/4 Bragg reflector geometry is largest for a first of the grating rings immediately adjacent the center disk and decreases in a radially outward direction. | 04-15-2010 |
| 20100110549 | Optical Element and Method for Machining Die for Optical Element - An optical element having a phase structure on the optical surface formed of a plurality of optical function surfaces divided through a plurality of stepped portions. The sculpture height of each of the stepped portions is set lower than that of the optical function surface. Thus, precision of profile is prevented from falling due to prolongation of production time. | 05-06-2010 |
| 20120075704 | DIFFRACTION OPTICAL ELEMENT - An imaging optical system according to the present invention includes a lens that has first and second surfaces and that has a diffraction grating on only one of the first and second surfaces. If the diameter of an effective area, which is defined by a light ray that has entered the lens with a maximum angle of view, is D when measured on the surface with the diffraction grating, an F number of the imaging optical system at the maximum angle of view is Fno, a d-line Abbe number of the lens is νd, and an F number of an axial bundle of rays is F, then the average diffracting ring zone pitch | 03-29-2012 |
| 20140285894 | PHASE GRATING WITH THREE-DIMENSIONAL CONFIGURATION - A phase grating includes a substrate and a first dielectric layer. The first dielectric layer is disposed on the substrate and includes a column and a plurality of rings. The top sides of the column and the top sides of the rings align with one another to form a flat plane. The column and the rings are concentric. | 09-25-2014 |
| 20140293426 | Lens with an Extended Range of Focus - The invention relates to a lens which has an extended range of focus, wherein the lens consists of a solid material, the optical surfaces of the lens are transparent and the lens has a focal power distribution. According to the invention, the focal power distribution F | 10-02-2014 |
| 20160170102 | SOLAR LIGHT MANAGEMENT | 06-16-2016 |
