Patent application number | Description | Published |
20090180186 | DIFFRACTIVE OPTICAL ELEMENT AND METHOD FOR MANUFACTURING SAME - A diffractive optical element that can maintain transparency and be molded easily, and a method for manufacturing the same are provided. | 07-16-2009 |
20100085559 | METHOD FOR MEASURING OPTICAL CHARACTERISTICS OF DIFFRACTION OPTICAL ELEMENT AND APPARATUS FOR MEASURING OPTICAL CHARACTERISTICS OF DIFFRACTION OPTICAL ELEMENT - [Object] A measurement method and an evaluating apparatus are provided which are capable of easily and accurately evaluating the light amount of a spot beam, the diffraction efficiency, and the intensity distribution in the optical axis direction by detecting even a weak diffracted beam in an arbitrary wavelength range converged by a diffraction optical element as an imaging lens. | 04-08-2010 |
20100110547 | IMAGING DEVICE, AND DIFFRACTION GRATING LENS FOR USE IN THE DEVICE - In a refraction lens having an aspheric shape formed thereon and having a positive power, a diffraction grating is formed on at least one of the faces of the refraction lens. In order to reduce the curvature of field and the chromatic aberration in a well-balanced manner, the zonal pitch of the diffraction grating is constituted so as to satisfy the following conditional expression. | 05-06-2010 |
20100246967 | IMAGE PROCESSING DEVICE, IMAGING DEVICE, EVALUATION DEVICE, IMAGE PROCESSING METHOD, AND OPTICAL SYSTEM EVALUATION METHOD - An image processing device that can highly precisely correct an image with a degraded image quality due to the unnecessary diffracted light generated in the optical system including the diffractive optical element is provided. The image processing device includes an evaluation area setting unit ( | 09-30-2010 |
20110096400 | DOUBLE IMAGE PICKUP OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS PROVIDED THEREWITH - According to the present invention, a small-sized double-lens imaging optical system whose chromatic aberration is corrected even at a super wide angle of 150° or more can be provided. The double-lens imaging optical system of the present invention includes a concave lens, and a convex lens having a diffraction grating provided thereon, and satisfies the following conditional expression (1): | 04-28-2011 |
20110102898 | DIFFRACTIVE LENS AND IMAGE PICKUP DEVICE USING THE SAME - A diffractive lens | 05-05-2011 |
20120008210 | DIFFRACTIVE LENS AND IMAGE CAPTURE DEVICE USING THE SAME - The present invention reduces the angle dependence of diffraction efficiency by taking the diffraction pitch and diffraction step of an optical element with a diffraction grating such as a lens into account. Specifically, for that purpose, an optical element that has a first group of diffraction grating portions | 01-12-2012 |
20120069327 | METHOD FOR MEASURING OPTICAL CHARACTERISTICS OF DIFFRACTION OPTICAL ELEMENT AND APPARATUS FOR MEASURING OPTICAL CHARACTERISTICS OF DIFFRACTION OPTICAL ELEMENT - A measurement method and an evaluating apparatus are provided which are capable of easily and accurately evaluating the light amount of a spot beam, the diffraction efficiency, and the intensity distribution in the optical axis direction by detecting even a weak diffracted beam in an arbitrary wavelength range converged by a diffraction optical element as an imaging lens. | 03-22-2012 |
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 |
20120092769 | DIFFRACTIVE LENS - A diffractive lens according to the present invention has the function of focusing light. The diffractive lens has a side on which a diffraction grating is arranged on either an aspheric surface or a spherical surface in its effective area. The diffraction grating has n | 04-19-2012 |
20120113518 | DIFFRACTION GRATING LENS AND IMAGE CAPTURE APPARATUS USING THE SAME - A diffraction grating lens of the present invention includes a lens base | 05-10-2012 |
20120140209 | METHOD FOR MEASURING OPTICAL CHARACTERISTICS OF DIFFRACTION OPTICAL ELEMENT AND APPARATUS FOR MEASURING OPTICAL CHARACTERISTICS OF DIFFRACTION OPTICAL ELEMENT - A measurement method and an evaluating apparatus are provided which accurately evaluate the light amount of a spot beam, the diffraction efficiency, and the intensity distribution in the optical axis direction by detecting even a weak diffracted beam in an arbitrary wavelength range converged by a diffraction optical element as an imaging lens. Light emitted from a white light source passes through a wavelength band-pass filter and is diaphragmed by a pinhole slit. The resultant light is paralleled by a collimator lens and enters a diffraction optical element as an imaging lens. The light getting out from the diffraction optical element is converged to be a spot beam, is magnified by a microscope | 06-07-2012 |
20120170121 | DIFFRACTION GRATING LENS AND IMAGING DEVICE IN WHICH THE SAME IS USED - A diffraction grating lens according to the present invention is a diffraction grating lens | 07-05-2012 |
20120182618 | DIFFRACTION GRATING LENS AND IMAGING DEVICE USING SAME - A diffraction grating lens according to the present invention includes a lens body | 07-19-2012 |
20120243096 | DIFFRACTION GRATING LENS AND METHOD OF PRODUCING THE SAME, AND IMAGING DEVICE IN WHICH THE SAME IS USED - A diffraction grating lens according to the present invention includes a lens body and a diffraction grating provided on the surface of the lens body, the diffraction grating including a plurality of annular zones having slopes inclined along a width direction and a plurality of step surfaces respectively located between the plurality of annular zones. At least one of the plurality of annular zones is light-transmissive across its entire area along the width direction, and in the at least one annular zone, a light transmittance near at least one of two ends along the width direction is smaller than a light transmittance near a central portion along the width direction. | 09-27-2012 |
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 |
20130145608 | METHOD FOR DESIGNING AND METHOD FOR MANUFACTURING DIFFRACTION-GRATING LENS - A method for designing a diffraction grating lens of the present invention is a method for designing a diffraction grating lens having a diffraction grating composed of a plurality of diffraction zones, the method including the steps of: (a) determining widths of the plurality of diffraction zones; and (b) determining an aspherical coefficient of a diffraction surface on which the diffraction grating is provided while the determined widths of the plurality of diffraction zones are fixed, after the step (a). | 06-13-2013 |
20130293704 | IMAGING APPARATUS - An imaging apparatus disclosed in the present application includes a lens optical system, an imaging element and an optical array element. The lens optical system includes first and second areas having different optical characteristics with each other. The imaging element includes first and second pixels each including a filter of a first spectral transmittance characteristic, third pixels including a filter of a second spectral transmittance characteristic, and fourth pixels including a filter of a third spectral transmittance characteristic. The optical array element causes the light passing through the first area to be incident on the first pixels and one of the third and fourth pixels and causes the light passing through the second area to be incident on the second pixels and the other of third and fourth pixels. | 11-07-2013 |
20130341493 | IMAGING DEVICE AND IMAGING SYSTEM - An imaging apparatus according to one embodiment of the present invention includes: a lens optical system having first to third regions, the first region transmitting light of a first wavelength band, the second region transmitting light of the first wavelength band and having optical characteristics for providing a different focusing characteristic from a focusing characteristic associated with rays transmitted through the first region, and the third region transmitting light of a second wavelength band; an imaging device on which light having passed through the lens optical system is incident, the imaging device having a plurality of first to third pixels; and a microlens array causing light having passed through the first region to enter the plurality of first pixels, light having passed through the second region to enter the plurality of second pixels, and light having passed through the third region to enter the plurality of third pixels. | 12-26-2013 |
20140043687 | DIFFRACTION OPTICAL ELEMENT - A diffractive optical element includes: a body being composed of a first optical material and having a diffraction grating on the surface thereof; and an optical adjustment layer being composed of a second optical material and provided on the body so as to cover the diffraction grating. An envelope passing through the edge of the diffraction grating presents a curved surface, and the optical adjustment layer has a uniform thickness along the normal direction from the envelope. | 02-13-2014 |
20140055664 | IMAGING DEVICE - An image capture device according to the present disclosure includes: a lens optical system L; an image sensor N on which light that has passed through the lens optical system L is incident and which includes at least a plurality of first pixels and a plurality of second pixels; and an array of optical elements K which is arranged between the lens optical system and the image sensor. The lens optical system has a first optical region D | 02-27-2014 |