Class / Patent application number | Description | Number of patent applications / Date published |
356124500 | For optical transfer function | 12 |
20090185174 | METHOD FOR TESTING A LENS AND POSITIONING THE LENS RELATIVE TO AN IMAGE SENSOR - A method for testing and positioning a lens includes determining whether a modulation transfer function (MTF) value of the lens for an object at a first object distance is not less than a first required MTF value and whether another MTF value of the lens for an object at a secondary object distance is not less than a secondary required MTF value. A first MTF curve is plotted according to optical resolution measurements for the object at the first object distance, and the secondary MTF curve is obtained by offsetting the first MTF curve. The secondary MTF curve can approximately represent optical resolution measurements for the object at a secondary object distance. The method can determine an ideal range of positions of the lens relative to an image sensor. | 07-23-2009 |
20100053601 | OPTICAL DEVICE INSPECTING APPARATUS - To provide an optical device inspecting apparatus which can be set to take many objects at one time more freely compared with conventional apparatuses, and furthermore, can accurately inspect even an optical device wherein an optical sensor is offset from a microlens. [MEANS FOR SOLVING PROBLEMS] Provided is an optical device inspecting apparatus having a probe card unit and a lens unit. The probe card unit is provided with a main substrate, a guide plate and a probe. Openings are made on the main substrate and the guide plate. The guide plate is fixed at a prescribed position from the main substrate, and is provided with a plurality of probe inserting holes. The probe is inserted into the probe inserting hole on the guide plate and fixed. The leading end portion of the probe protruding from the inserting hole has a shape of a cantilever. The lens unit using a pupil lens is arranged at the opening on the main substrate, and makes light applied to an inspecting object incline as the light goes further from the center of the optical system. | 03-04-2010 |
20100177303 | MTF MEASURING SYSTEM, MTF MEASURING METHOD, MTF MEASURING UNIT AND MTF MEASURING PROGRAM - Measurement result screen data indicative of an object image and an MTF curve image are generated in accordance with the object image data obtained by photographing the object and the MTF curve image data indicative of the MTF curve generated from MTF data that become an index to evaluate lens performance. The measurement result screen based on the generated measurement result screen data is displayed, so that the measurement result screen indicative of the object image and the MTF curve image can be displayed on a real time basis in the case of evaluation measurement operations of the lens performance. As a result, a user grasps necessity for a focus adjustment from the MTF curve image on the measurement result screen, if necessary, adjusts focus of the object displayed together with the MTF curve image, and at the same time can evaluate the lens performance from the MTF curve image. | 07-15-2010 |
20110102776 | BEAM PATH MONITORING DEVICE AND BEAM PATH MONITORING SYSTEM - An optical line monitoring apparatus and optical line monitoring system which can measure a reflectance distribution in an optical line with a high spatial resolution in a short time are provided. An optical line monitoring apparatus | 05-05-2011 |
20120113413 | METHOD AND DEVICE FOR ALGINING A LENS WITH AN OPTICAL SYSTEM - The invention comprises a process for pre-aligning a lens with an optical system, the process comprising: providing a lens and an optical system having an optical axis, wherein the lens is apt to be aligned with the optical system to form on an image plane an image of a source object, the image having top, bottom, left and right edges; coarsely positioning the lens with respect to the optical system; and in a plane normal to the optical axis of the optical system, correcting the position of the lens until the values of four Combination Modulation Transfer Functions (C-MTF) are in predetermined ranges, the C-MTF being calculated at four coarse measurement locations situated close to the edges of the image along two coarse positioning axes crossing the center of the image, each for a combination pattern comprising a combination of a Sagittal pattern and a Tangential pattern. | 05-10-2012 |
20130057851 | Simplified Checking Bench for Telescopes and Auto-Checkable Telescopes - In the field of optical checking of optical instruments of telescope type, an instrument comprises an optical objective, a photo-detection housing arranged at the focus of said optical objective and at least one light source arranged in the vicinity of said photo-detection housing, the optical pupil of the optical objective having a first diameter. The checking means comprise a plane mirror having a second diameter that is smaller than the first diameter and means to arrange the plane mirror such that the image of the light source given by the optical objective and reflected by said plane mirror is focused on the photo-detection housing, means for analyzing said image received making it possible to determine the optical quality of the telescope. The plane mirror may be associated with an autonomous checking bench. It may also form part of the telescope and be incorporated into the protection hood for the optic. | 03-07-2013 |
20130258322 | LENS TESTING DEVICE - A lens testing device includes a light source assembly, a pattern plate, and an imaging sensor. The light source assembly includes a transparent base plate, a light guide plate, and a number of illuminants. The light source assembly uses the light guide plate to uniformize light coming from the illuminants and emit the light onto the pattern plate. The imaging sensor is placed beneath the transparent base plate to sense the light passing through the pattern plate and focused by a lens under test. | 10-03-2013 |
20150062566 | LENS ASSEMBLY TESTING METHOD - A lens assembly testing method includes: providing a lens assembly having a first lens and a second lens placed on the first lens; determining whether a modulation transfer function value of the lens assembly is in a predetermined range; if not, separating the first lens and the second lens, and forming a first coating layer and a second coating layer on the first lens to obtain a coated first lens with a number of dots; capturing two images of the coated first lens; attaching the coated first lens on the second lens, and capturing another two images of the coated first lens; determining an actual moving distance of a chosen dot using a 3D-Digital image correlation method according to the four images; adjusting a size of the first lens according to the actual moving distance; and displaying the adjusted size of the first lens to a user. | 03-05-2015 |
20150062567 | LENS MODULE TESTING METHOD - A lens module testing method includes the following steps: providing a lens module having a lens and a barrel; determining whether a modulation transfer function value of the lens is in a predetermined range; if not, separating the lens and the barrel, and forming a first coating layer and a second coating layer on the lens to obtain a coated lens having a number of dots; capturing a first image of the coated lens; placing the coated lens in the barrel to obtain the lens module, and capturing a second image of the coated lens; randomly choosing one dot from the dots, and determining an actual moving distance of the chosen dot using a 3D-Digital Image Correlation according to the first image and the second image; adjusting a size of the lens according to the actual moving distance; and displaying the adjusted size of the lens to a user. | 03-05-2015 |
20150300912 | METHOD FOR CHECKING THE COMPLIANCE OF AN OPTICAL CHARACTERISTIC OF AN OPHTHALMIC LENS AND ASSOCIATED DEVICE - A method for checking the compliance of a checked optical characteristic of a checked ophthalmic lens ( | 10-22-2015 |
20160161364 | APPARATUS, SYSTEMS AND METHODS FOR IMPROVING VISUAL OUTCOMES FOR PSEUDOPHAKIC PATIENTS - A system and method of characterizing through-focus visual performance of an IOL using metrics based on an area under the modulation transfer function for different spatial frequencies at different defocus positions of the IOL. Also disclosed is a system and method of characterizing through-focus visual performance of an IOL using a metric based on an area under a cross-correlation coefficient for an image of a target acquired by the IOL at different defocus positions of the IOL. | 06-09-2016 |
20170234765 | SYSTEMS AND METHODS FOR ESTIMATING MODULATION TRANSFER FUNCTION IN AN OPTICAL SYSTEM | 08-17-2017 |