| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 359565000 | From zone plate | 11 |
| 20080198465 | OPTICAL PICKUP DEVICE AND OPTICAL DISK DEVICE - An optical pickup device is disclosed. The device includes: a light source that emits a light beam of a predetermined wavelength of about 405 nm; an objective lens being a plastic lens provided with, on at least one surface, diffraction means of a zone diffractive structure suppressing generation of aberration to be caused by a temperature change, and has a numerical aperture of 0.82 or larger for gathering the light beam emitted from the light source with respect to an optical disk; and a collimator lens disposed between the light source and the objective lens, and derives a substantially-collimated light by converting an angle of divergence of the light beam emitted from the light source. | 08-21-2008 |
| 20090002829 | IMAGING DEVICE, CAMERA MODULE, AND MOBILE TERMINAL APPARATUS - An imaging device is provided and includes: an imaging element that outputs an imaging signal based on an optical image; and a diffractive optical element disposed on an image formation surface side of the imaging element. | 01-01-2009 |
| 20090135486 | USE OF A FOCUSING VORTEX LENS AS THE OBJECTIVE IN SPIRAL PHASE CONTRAST MICROSCOPY - A method and objective apparatus are provided for implementing an enhanced phase contrast microscope. A focusing vortex lens, defined by a diffractive spiral zone plate (SZP) lens, is used for the objective for the phase contrast microscope. The SZP lens focuses and imparts a helical phase to incident illumination to image the specimen with spiral phase contrast. The spiral phase contrast microscope is sensitive to phase gradients in all sample axes. Replacing the objective of a microscope with the diffractive SZP lens of the invention immediately provides existing instruments with spiral phase contrast capability. | 05-28-2009 |
| 20100097703 | MULTIPLE-WAVELENGTH BINARY DIFFRACTIVE LENSES - A dichromatic lens includes a plurality of zones being arranged on a lens structure, each of the zones having a specified radius and varying height. The lens structure focuses propagating light applicable to any intensity distribution for a plurality of wavelengths. | 04-22-2010 |
| 20100195208 | CUSTOMISATION OF A HOT STAMP FOIL OR LAMINATE - A method of producing a film having a diffractive surface pattern in selected areas by processing a precursor film having a diffractive surface relief throughout one or more zones together defining a target area of the precursor film; the method comprising applying material to a selected zone of the diffractive surface relief so as to nullify the diffractive effect of the surface relief in the zone. | 08-05-2010 |
| 20100238554 | SIGHTING OPTICS - One embodiment of sighting optics according to the teachings provided herein may comprise a front sight and a rear sight positioned in spaced-apart relation. The rear sight includes optical element having a first focal length and a second focal length. The first focal length is selected so that it is about equal to a distance separating the optical element and said front sight and the second focal length is selected so that it is about equal to a target distance. The optical element thus brings into simultaneous focus for a user images of the front sight and the target. | 09-23-2010 |
| 20110134531 | PRESSING MOLD FOR OPTICAL LENSES, GLASS OPTICAL LENS AND METHOD FOR MANUFACTURING GLASS OPTICAL LENSES - A pressing mold for optical lenses, which molds a ring-zone-type diffraction lens having a plurality of concentric ring zones, the mold including: diffraction action transfer surfaces configured to form diffraction action surfaces that diffract light passing through the diffraction lens; and step transfer surfaces configured to form step surfaces that connect the adjacent diffraction action surfaces of the diffraction lens, wherein surface roughness of the step transfer surfaces is larger than surface roughness of the diffraction action transfer surfaces. | 06-09-2011 |
| 20120105961 | ZONE PLATE - A zone plate includes a plurality of consecutively arranged, adjacent, and alternating first and second regions. The first regions are arranged to be substantially transparent to a first predetermined wavelength of radiation and a second predetermined wavelength of radiation that is different from the first predetermined wavelength of radiation. The second regions are arranged to be substantially opaque, diffractive, or reflective to the first predetermined wavelength of radiation and substantially transparent to the second predetermined wavelength of radiation. | 05-03-2012 |
| 20120300301 | DIFFRACTION-GRATING LENS, AND IMAGING OPTICAL SYSTEM AND IMAGING DEVICE USING SAID DIFFRACTION-GRATING LENS - An imaging optical system according to the present invention includes: at least one diffraction grating lens with a diffraction grating that is made up of q diffraction ring zones; and a stop. A surface of the at least one diffraction grating lens that has the diffraction grating is a lens surface that is located closest to the stop. Supposing the respective widths of diffraction ring zones that are located first, second, (m−1) | 11-29-2012 |
| 20140204463 | ZONE PLATE - Although, conventionally, there were two methods, (1) a wave was transmitted through a spiral phase plate and (2) a diffraction grating containing an edge dislocation was used, they incurred complication of a configuration and securement of a larger amount of space and were not efficient because each of the spiral wave generation methods needed an incident wave to be a plane wave and at least one time of imaging is necessary at the time of wave irradiation on an observation object. In order to efficiently generate the spiral wave having a sufficient intensity, a structure of edge dislocation is taken in into a pattern of the zone plate and a spiral pattern containing a discontinuous zone is formed. Moreover, a thickness and a quality of material that change the phase of the wave by an odd multiple of π are selected for a material of the wave-blocking section in the pattern. | 07-24-2014 |
| 20150022892 | Method of Producing a Fresnel Zone Plate for Applications in High Energy Radiation - The invention concerns to a method of producing a Fresnel Zone Plate ( | 01-22-2015 |
