36results about How to "Increased focus range" patented technology

There is provided a positive type resist composition formed by dissolving (A) a resin component with a unit derived from a (meth)acrylate ester in the principal chain, for which the solubility in alkali increases under the action of acid, and (B) an acid generator component which generates acid on exposure, in an organic solvent component (C), wherein the resin component (A) is a copolymer comprising (a1) a unit derived from a (meth)acrylate ester comprising an acid dissociable, dissolution inhibiting group containing a polycyclic group, (a2) a unit derived from a (meth)acrylate ester comprising a lactone containing monocyclic group or polycyclic group, (a3) a unit derived from a (meth)acrylate ester comprising a hydroxyl group containing polycyclic group, and (a4) a unit derived from a (meth)acrylate ester comprising a polycyclic group which is different from the unit (a1), the unit (a2) and the unit (a3). This composition provides a chemically amplified positive type resist composition which displays excellent resolution, enables the depth of focus range of an isolated resist pattern to be improved, and enables the proximity effect to be suppressed.

A software program for evaluating and enhancing at least one user cognitive skill, the program including an animation module for displaying at least one first display that includes at least one first object having a first cognitively recognizable changing property of movement and at least one second cognitively recognizable changing property, a response module that receives input from a user signaling device that signals user recognition of the changing, an evaluation module that evaluates the user response based upon at least one evaluation parameter, and an evaluation appraisal module that generates an evaluation display based upon the evaluation.

A concave-convex surface inspection apparatus includes a slit light source unit emitting a slit light to a concave-convex surface of an object to be inspected, an image-taking unit taking an image of the concave-convex surface illuminated by the emitted slit light with an imaging optical axis intersecting with an optical axis of the slit light with a narrow-angle equal to or narrower than 30 degrees, and an evaluation section obtaining a three dimensional shape of the concave-convex surface and evaluating the obtained three dimensional shape, wherein the slit light source unit includes a slit light source and a cylindrical lens, the image-taking unit includes a telecentric lens unit, an image-taking section having an imaging surface tilted relative to the imaging optical axis for increasing a focusing range of the concave-convex surface, and a P polarizer.

The invention discloses a high precision lens center deviation detection instrument and a measurement method thereof. The high precision lens center deviation detection device comprises an LED irradiation source emission system, a microscope system and a detected glass bearing which are arranged on a pedestal; the LED irradiation source emission system and the detected glass bearing are in a same plane; the microscope system is arranged above the detected glass bearing; light rays emitted by a light source in a signal emission system is turned by a reflection prism and goes to detected glass after going through a cross wire and being focused by a light condensation lens, and then the light rays are imagined on a cross reticle after amplification by a microscope system and then are imagined on a CCD through an electronic ocular lens and displayed on a monitor. The high precision lens center deviation detection device and a measurement method thereof can realize measurement on center deviations of lenses with an extremely big focal length or an extremely small focal length and avoids a fact that reading is affected because the cross wire is too thick while the sensitivity is not changed. According to displacement of the cross wire after the lens is rotated for one round, the measurement on the center deviation is realized.

A lens having an extended range of focus is made of a transparent material and has two optical surfaces. The lens defines an optical axis and a focal power distribution (F_tot) which, in relation to a plane perpendicular to the optical axis, changes as a function of the radial height (r) and of the azimuth angle (phi) of the aperture between a calculated basic value of the focal power (F_lens) not equal to zero and a maximum value F_{spiral max} (r, phi).

The embodiment of the invention provides an image acquisition method and image acquisition equipment. The image acquisition method is applied to the image acquisition equipment comprising a first chip, zoom lenses, image sensors, zoom motors and focusing motors. The number of the first chip is one. According to the image acquisition equipment with the two zoom lenses, the two zoom lenses have different zoom ranges, and an overlapped focal length range exists between the zoom ranges of the two lenses, and the two zoom lenses comprise a first short zoom lens and a second long zoom lens; the number of the image sensors is two, and the two image sensors correspond to the two zoom lenses respectively, and the two image sensors are in communication connection with the first chip; and the numberof the zooming motors is two, and the number of the focusing motors is two, and the two zooming motors and the two focusing motors are in communication connection with the first chip. Through superposition of zoom ranges of the two zoom lenses, the focal length range of the image acquisition equipment is expanded on the premise of not increasing the volume of a single lens.

A focus extending optical system has optical lenses and a focus extender. The optical lenses form an image of light, from an object, on an image sensor. The focus extender adjusts a wavefront so as to change a position of the image, formed by the optical lenses, in accordance with a distance from an optical axis and thereby extends a focus range. The focus extending optical system satisfies a condition that a value of a second MTF is less than or equal to three times a value of a first MTF. The first MTF is an MTF at a spatial frequency of ½ of a Nyquist frequency of the image sensor. The second MTF is an MTF at a spatial frequency of ¼ of the Nyquist frequency.

The invention relates to the technical field of imaging systems, in particular to an automatic focusing method and system based on flight time, and the method comprises the following steps: measuringan object distance u between a laser ranging module and a target object, and transmitting object distance data to an image acquisition card; enabling the image acquisition card to estimate an initialfocal length f of the lens through interpolation operation by taking an object distance u as a setting basis; enabling the image acquisition card to set a focusing search range and a focusing motor motion step number according to a focal length f, obtain a plurality of images in the focusing search range, compare the obtained images to obtain a maximum characteristic value, and record an adjustment value of the focusing motor when the maximum characteristic value is obtained; and adding the adjustment value and the initial focal length to obtain the focusing focal length of the lens. The method and the system have the beneficial effects that the focusing precision and stability of the lens under the condition of image movement or insufficient light are improved, the focusing range of the lens is expanded, and the lens is suitable for ultra-long-distance focusing.