107results about How to "Increase focal length" patented technology

A vehicle vision system includes a vehicle having first and second spatially separated image capture sensors. The first image capture device has a first field of view having a first field of view portion at least partially overlapping a field of view portion of a second field of view of the second image capture device. A control receives a first image input from the first image capture sensor and a second image input from the second image capture sensor and generates a composite image synthesized from the first image input and the second image input. A display system displays the composite image.

A vehicle vision system includes a vehicle having first and second spatially separated image capture sensors. The first image capture device has a first field of view having a first field of view portion at least partially overlapping a field of view portion of a second field of view of the second image capture device. A control receives a first image input from the first image capture sensor and a second image input from the second image capture sensor and generates a composite image synthesized from the first image input and the second image input. A display system displays the composite image.

Ultrashort pulse laser processing bores, welds or cuts objects (work pieces) by converging ultrashort laser pulses by a lens on the objects (work pieces) positioned at the focus and heating small spots or narrow lines on the objects (work pieces). Shortage of a focal depth of the lens prevents the ultrashort pulse laser processing from positioning the object (a work piece) and forming a deep, constant-diameter cylindrical hole. Z-parameter is defined to be Z=2fcΔt / Δi2, where Δt is a FWHM pulse width of the ultrashort pulse laser, Δi is a FWHM beam diameter of the ultrashort pulse, f is a focal length of the lens and c is the light velocity in vacuum. Selection of an optical system including a diffraction-type lens which gives the Z-parameter less than 1 (Z<1) prolongs the focal depth. Expansion of the focal depth facilitates the positioning of objects (work pieces) and enables the ultrashort pulse laser apparatus to bore a deep, constant-diameter cylindrical hole.

An imaging device includes an arrayed imaging element group configured to receive light passing through a photographic lens, wherein the imaging element group includes a plurality of photographic elements used for photographic image data generation and a plurality of phase difference detection elements used for phase difference detection for focus detection of the photographic lens, each of the photographic elements and each of the phase difference detection elements include: an on-chip microlens configured to collect light passing through the photographic lens; a photoelectric conversion element configured to receive the light passing through the on-chip microlens; and an internal microlens disposed between the on-chip microlens and the photoelectric conversion element, the photographic element is configured such that an optical axis of the on-chip microlens matches an optical axis of the internal microlens, and the phase difference detection element is configured such that the optical axis of the on-chip microlens is shifted from the optical axis of the internal microlens.

An iris recognition lens system including a first lens and a second lens disposed on an optical axis and sequentially from an object to take an image of an iris and a pupil. A front part of the first lens includes a reflecting area in a central portion and a transmitting area in a circumferential portion. A rear part of the first lens includes a concave transmitting area in a central portion and a reflecting area in a circumferential portion. The second lens is disposed at a rear of the transmitting area in the central portion of the rear part of the first lens. A plurality of reflecting areas and a plurality of transmitting areas are provided in a single lens in order to reduce the length of the lens and increase a focal length, thereby reducing the length of the entire iris recognition lens system.

A numerical aperture (NA) controlling unit and a variable optical probe including the same are provided. The NA controlling unit includes: an aperture adjustment unit which controls an aperture through which light is transmitted; and a focus control unit that is disposed in a predetermined position with respect to the aperture adjustment unit, that focuses light transmitted through the aperture, and that has an adjustable focal length. The variable optical probe includes: a light transmission unit; a collimator that collimates light transmitted through the light transmission unit into parallel light; an NA controlling unit that focuses light on a sample to be inspected; and a scanner that varies a path of light transmitted through the light transmission unit such that a predetermined region of the sample is scanned by light that passes through the NA controlling unit.

The invention belongs to the technical field of optical imaging and detecting and relates to a bilateral dislocation differential confocal element parameter measuring method. The method includes the steps that dislocation differential subtracting processing is conducted on the two sides of a confocal axial characteristic data set measured by the starting points and the ending points of all various size parameters including the curvature radius, the lens thickness, the refractive rate, the focal distance and the interval, and therefore the positioning precision of the starting points and the ending points of the size parameters is improved, and the measuring precision of optical elements of the curvature radius, the lens thickness, the refractive rate, the focal distance, the interval and the like is improved. According to the bilateral dislocation differential confocal element parameter measuring method, due to the fact that two sections of data, close to the position of the full width at half maximum and very sensitive to axial displacement, of a confocal characteristic curve are used for conducting the dislocation differential subtracting processing, the position, calculated by the data sections, of the extreme point of the confocal characteristic curve is more sensitive and more accurate than the position, calculated through an existing confocal characteristic curve top fitting method, of the extreme point of the confocal characteristic curve, according to the result of the bilateral dislocation differential confocal element parameter measuring method, under the condition that the confocal element parameter system structure is not changed, the axial focusing capability, the signal-to-noise ratio and the like of the system can be obviously improved.

Although use of a nitrogen-containing compound as a basic compound component of a resist composition makes it possible to ease the T-top problem at an acid dissociation constant pKa falling within a range of 2 to 6, it is accompanied with the problem that the reaction, that is, acid diffusion upon use of a highly-reactive acid-labile group cannot be controlled. In order to overcome this problem, one or more basic compounds selected from those represented by the following formulas (I) to (III) and (1) to (4) are employed.

A variable magnification optical system consists of a negative first lens group, a stop that is fixed relative to an image plane during magnification change, and a positive second lens group, which are in this order from an object side. A distance between the first lens group and the second lens group in an optical axis direction becomes shorter when magnification is changed from a wide-angle end to a telephoto end. The first lens group consists of a positive lens having a convex object-side surface and two negative lenses, in this order from the object side. The variable magnification optical system satisfies the following formula (1) about Abbe number νd1 of the positive lens in the first lens group for d-line:25.5<νd1<50  (1).

An ultrasonic imaging apparatus and method combines dynamically focused reception and coded transmission / reception technologies by inexpensive circuitry. A receive aperture is divided into smaller apertures. Correspondingly, a receive beam former is divided into receive sub-beam formers 36a to 36n by which a phase alignment and summing process is performed. Thereafter, coded signals are compressed in decoders 37a to 37n in a time axis direction. Output signals from the decoders are once again subjected to a phase alignment and summing process in a second beam former.

The present invention discloses a method for manufacturing an image sensor which makes the boundaries between microlenses clear by forming a guide layer in advance and can increase the focal distance of light and the quantity of light by forming the spheres of the microlenses to have a constant height.

The present invention discloses a method for manufacturing an image sensor which makes the boundaries between microlenses clear by forming a guide layer in advance and can increase the focal distance of light and the quantity of light by forming the spheres of the microlenses to have a constant height.

An optical system is provided for use in a vehicle head-up display including a display panel for displaying drive information image, a backlight unit for irradiating light toward the display panel and an optical system for adjusting the size and focal distance of the drive information image projected from the display panel toward a windshield of a motor vehicle. The optical system includes a pre-lens reflection mirror array for reflecting the drive information image projected from the display panel to travel along a first roundabout path, a lens array for adjusting the size and focal distance of the drive information image reflected by the pre-lens reflection mirror array, and a post-lens reflection mirror array for reflecting the drive information image coming from the display panel toward the windshield to travel along a second roundabout path.

An optical system is provided for use in a vehicle head-up display including a display panel for displaying drive information image, a backlight unit for irradiating light toward the display panel and an optical system for adjusting the size and focal distance of the drive information image projected from the display panel toward a windshield of a motor vehicle. The optical system includes a pre-lens reflection mirror array for reflecting the drive information image projected from the display panel to travel along a first roundabout path, a lens array for adjusting the size and focal distance of the drive information image reflected by the pre-lens reflection mirror array, and a post-lens reflection mirror array for reflecting the drive information image coming from the display panel toward the windshield to travel along a second roundabout path.

A projection lens system 1A enlarges and projects onto a screen 8, via a plurality of lenses G1 to G16, image light emitted from, a light source 4 and modulated by DMDs 3r to 3b. A movable lens barrel 25 holds the lens G16, having positive power, which is positioned closest to the DMDs 3r to 3b. An outer tube 24 holds the movable lens barrel 25 to enable movement in the optical axis direction. Through thermal deformation at the time of an increase in temperature, the bimetal member 27 moves the movable lens barrel 25 in the optical axis direction so as to recede from the image formation devices which are the DMDs 3r to 3b.

An image forming optical system comprising, in order from the object side: a first lens group G1 that is fixed during zooming and includes a reflecting optical element for bending an optical path; a second lens group G2 having a negative refracting power and movable during zooming; a third lens group G3 having a positive refracting power; a fourth lens group G4 having a positive refracting power; and a rearmost lens group GR, wherein during zooming from the wide angle end to the telephoto end, the third lens group G3 moves on the optical axis toward the object side, characterized in that the rearmost lens group GR satisfies the following condition:0.95<βRw<2.5  (1-1).

A display optical system and an image projector incorporating the same. The display optical system includes a light source operable to emit light; a plurality of reflective light-modulating devices; a plurality of optical elements; a projection optical system including at least one refractive lens; and an optical curved-surface having a finite radius of curvature and interposed between the projection optical system and at least one of the plurality of reflective light-modulating devices, wherein the optical elements are arranged to guide light from the light source to the reflective light-modulating devices and to guide outgoing light from the reflective light-modulating devices to the projection optical system, and wherein the at least one refractive lens of the projection optical system projects incoming light to a predetermined plane.

A display optical system and an image projector incorporating the same. The display optical system includes a light source operable to emit light; a plurality of reflective light-modulating devices; a plurality of optical elements; a projection optical system including at least one refractive lens; and an optical curved-surface having a finite radius of curvature and interposed between the projection optical system and at least one of the plurality of reflective light-modulating devices, wherein the optical elements are arranged to guide light from the light source to the reflective light-modulating devices and to guide outgoing light from the reflective light-modulating devices to the projection optical system, and wherein the at least one refractive lens of the projection optical system projects incoming light to a predetermined plane.

A lens for image pickup is provided in which various aberrations are corrected satisfactorily, the optical length is at maximum approximately 6 mm, and moreover a sufficient back focus is secured. This lens for image pickup comprises a first lens, an aperture diaphragm, and a second lens, positioned in this order from the object side toward the image side. The first lens is a resin lens with a meniscus shape, with the convex surface facing the object side, and having positive refractive power. The second lens is a resin lens with a meniscus shape, with the convex surface facing the image side, and having positive refractive power.

A rear attachment lens changes a focal-length of an entire lens-system, in which the rear attachment lens has been attached to a main-lens, to a longer focal-length-side than a focal-length of the main-lens by being attached to an image-side of the main-lens. The rear attachment lens consists essentially of a first-lens-group and a second-lens-group in this order from an object-side. The first-lens-group consists essentially of a negative lens and a positive lens in this order from the object-side. The second-lens-group consists essentially of at least one negative lens and at least one positive lens, and a lens closest to an image-side in the second lens-group is a positive lens. When an Abbe number for d-line and a partial dispersion ratio between g-line and F-line of the negative lens in the first-lens-group are νd1 and θgF1, respectively, conditional expression (1): νd1>62 and conditional expression (2): 0.64<θgF1+0.001625 ×νd1<0.69 are satisfied.

The invention discloses a shortwave infrared telescope lens which is formed by the configuration of a first lens group with positive focal power, a second lens group with negative focal power and a third lens group with positive focal power from an object side orderly. The second lens group is formed by single lens elements. In the time of focusing, the second lens group moves along an optical axis, and the first lens group and the third lens group are fixed relative to an imaging surface. The invention provides the shortwave infrared telescope lens with a small size, light weight, large diameter, high resolution, excellent imaging performance and an inner focusing mode.

A rear attachment lens detachably attached to an image side of a main lens system to change a focal length of an entire system so as to become longer than a focal length of the main lens system includes one or more positive lenses GMp. One among the one or more positive lenses GMp is a positive lens P1. The Abbe number, a partial dispersion ratio, and a partial dispersion ratio difference of a material of the one or more positive lenses GMp and of the positive lens P1, and a focal length of the positive lens P1 are correctly defined so that chromatic aberrations are appropriately corrected, when predetermined conditions are satisfied.

A bi-directional fiber optic transceiver includes a laser diode, a photodiode, first and second lenses, all of which share a common linear optical axis, and a housing. The first lens may have transmission increasing film thereon. The second lens may have a reflection increasing film thereon. An optical splitter may be between the first and second lenses. The first and / or second lenses may be spherical, hemispherical or aspheric. The transceiver size is reduced so that a circuit board can accommodate more components or be smaller in size. Utilizing hemispherical lenses can greatly increase the coupling ratio of the optical links between the photodiode, fiber and laser diode. Utilizing aspheric lenses with high coupling can serve high power output requirements. Use of spherical lenses (which extend the focal length) with aspheric lenses enables LD TO assemblies in individual housings to serve in various products.

A relatively low cost, easy to install and aesthetically pleasing digital video broadcast from satellite (DVBS) elliptical horn antenna designed to receive satellite television broadcast signals with circular polarity. This type antenna may be implemented as a multi-beam, multi-band antenna with closely spaced antenna feed horns operable for simultaneously receiving signals from multiple satellites that are closely spaced from the perspective of the antenna.