551 results about "Negative refraction" patented technology

Provided is a lens module for imaging an object on an image plane. In the order from the object side to the image side of the lens module, the lens module includes a first lens made of glass and having positive refraction power, a second lens made of plastic and having negative refraction power, a aperture stopper, a third lens having positive refraction power, and a fourth lens having negative refraction power. The lens module satisfies the following formula: Vd1−Vd2≧35; wherein, Vd1 is the Abbe number of the first lens in d light and Vd2 is the Abbe number of the second lens in the d light.

A first lens group in a reflex, magnifying optical system includes sequentially from the side of an object, a first lens that has a negative refractive power and is a meniscus lens having a concave aspect facing toward an image, an optical element (prism) that refracts an optical path, a second lens having a negative refractive power and a concave aspect facing toward the object, and a third lens having a positive refractive power. A portion of an image-side aspect of the first lens abuts a plane of incidence of the optical element. A portion of an object-side aspect of the second lens abuts a plane of transmission of the optical element.

An image detection method includes steps of transferring image information in which, information of an object image on a sample (object plane) is transferred to a detection plane (image plane) of an imaging element via an optical system which includes a negative refraction lens formed of a material exhibiting negative refraction, detecting image in which, image-plane image information transferred to the detection plane (image plane) of the imaging device is detected optically, and calculation processing in which, for the image-plane image information which is detected, information of the object image is calculated by performing a calculation processing based on optical characteristics of the optical system.

An optical transmission device is provided with a first optical member having a negative refraction angle with respect to an incident angle of a beam and a second optical member having a positive refraction angle with respect to the incident angle, wherein the first and second optical members are arranged one each or more in tandem alternatively.

The invention provides a 3D interactive lens. A micro imaging lens system formed by five groups of lenses is arranged. The 3D interactive lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens from an object side to an image side successively. The first lens has a negative refraction power and the objective side is a convex surface; the second lens has positive fraction power and the image side of the second lens is a convex surface; the third lens has a negative refraction power and the image side of the third lens is a concave surface; the fourth lens has a positive refraction power and the image side of the fourth lens is a convex surface; and the fifth lens has a negative refraction power and the object side of the fifth lens is a convex surface and the image side is a concave surface. The lens meets the relations: 0<(R3+R4) / (R3-R4)<1.2, and 7<T12 / T23<25, wherein R3 and R4 respectively indicate curvature radiuses of the object side and the image side of the second lens, T12 indicates a distance between the first lens and the second lens at the optical axis, and the T23 indicates the distance between the second lens and the third lens at the optical axis. According to the invention, On the basis of configuration of the lens, advantages of small aperture and miniaturization and the like can be realized on the premise that wide angle and high resolution ratio are guaranteed. Meanwhile, the heat difference can be effectively eliminated and distortion can be well corrected.

A lens system includes a first lens which is formed of a medium exhibiting negative refraction, and a second lens having a positive refractive index. Accordingly, it is possible to provide a lens system in which a negative refractive index medium for which a curvature of field is reduced. Moreover, it is also possible to have a lens system in which a lens having a positive focal length and a lens having a positive focal length, which is made of a positive refractive index medium, are combined.

Light emitter excitation light (108) of a wavelength λ1 emitted by a light source (101) is collected on a light emitter (107) by a collective lens (102). The light emitter (107) is held on a substrate (104), and emits fluorescent light of a wavelength λ2 when the light emitter excitation light (108) of the wavelength λ1 is irradiated. A diameter of the light emitter (107) being formed to be smaller than the wavelength λ2, this fluorescent light includes evanescent waves, and advances through the substrate (104) as an object illuminating light (109) having the light emitter (107) as a point light source. A negative refraction lens (105) is disposed such that an image of the light emitter (107) is formed on a surface of an object 106, and accordingly, not only a propagating-light component included but also a evanescent-wave component in the object illuminating light (109) is also collected simultaneously, and a minute beam spot of a size almost same as of the light emitter (107) is formed on the surface of the object (106).

Disclosed is a zoom lens which is composed of a plurality of groups of lenses and which varies the power thereof by changing inter-group spacings. The zoom lens is configured such that: the last group of lenses that is located at the end of an image space and is negatively refractive is held stationary in optical-axis directions during variation of the power of the zoom lens, and includes a front group of negative lenses and a rear group of positive lenses; and the rear group of positive lenses or part of the rear group of positive lenses (hereinafter, referred to as a group of blur compensation lenses) is movable in directions orthogonal to the optical axis of the zoom lens. In this configuration, the group of blur compensation lenses is moved in the directions orthogonal to the optical axis in order to shift an image.

The invention relates to the field of optical lenses, and discloses a camera optical lens. The camera optical lens sequentially comprises, form the object side to the image side, a diaphragm, a firstlens with positive refraction force, a second lens with negative refraction force, a third lens with positive refraction force, a fourth lens with negative refraction force, a fifth lens with negativerefraction force, a sixth lens with positive refraction force, and a seventh lens with negative refraction force. The focal distance of the first lens is f1, the focal distance of the second lens isf2, the abbe number of the first lens is v1, and the abbe number of the second number is v2, wherein v1 / v2 is no less than 3.00 and no more than 4.20, and f2 / f1 is no less than -21.00 and no more than-5.00. The camera optical lens has good optical performance and can meet design requirements of a large diaphragm and being ultrathin.

An image capturing lens to capture an image of an object is provided with an aperture diaphragm having an aperture through which an image is captured; a first lens having a positive refracting power, wherein both surfaces of the first lens are shaped in a convex form; a second lens having a negative refracting power, wherein an object-side surface of the second lens is shaped a concave form; and a third lens which is a meniscus lens whose convex surface faces toward the object side; wherein the aperture diaphragm, the firs lens, the second lens and the third lens are aligned in this order from the object side. <IMAGE>

A lens has a convex or concave shaped smooth non-spherical surface or non-circular curve which is formed of a medium indicating negative refraction.

The present invention relates to the optical lens field, and discloses a camera shooting optical lens. The lens comprises from an object side to an image side in order: an aperture, a first lens with positive refraction power, a second lens with negative refraction power, a third lens with negative refraction power, a fourth lens with positive refraction power and a fifth lens with negative refraction power. The camera shooting optical lens satisfies the relation as follows: 0.70<f1 / f<0.80, 2.0<f2 / f< 1.7, 14<f3 / f< 10, 0.59<f4 / f<0.62, 0.52<f5 / f< 0.48, 1.09<(f3 f4) / (f3+f4)<1.12 and other relations. The camera shooting optical lens can satisfy the low TTL and the large aperture design requirement and has good sensitivity appearance.

The invention discloses an optical lens group used for image photographing, an image capture device and an electronic device. The optical lens group used for image photographing comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are arranged from an object side to an image side in turn. The first lens has positive refraction power, and the position, which is near the optical axis, of the object side surface of the first lens is a convex surface. The second lens has a negative refraction power. At least one surface of the object side surface and the image side surface of the sixth lens is an aspheric surface, and at least one surface includes at least one point of inflexion. The object side surface and the image side surface of the seventh lens are aspheric surfaces. When the specific condition is met, the optical lens group used for image photographing is enabled to have a telescope function and an aberration reducing function and effectively control the total length so as to achieve the requirement of micromation. The invention also discloses an image capture device having the optical lens group used for image photographing and an electronic device having the image capture device.

A microscope objective with high aperture, large object field and apochromatic correction in the wavelength range from ultraviolet to infrared. The microscope objective includes, starting from the object level: a first group of lenses with overall positive refraction power, including a cemented group with positive-negative refraction power effect, made out of one of two lenses, and of a further lens with positive refraction power, a second group of lenses with positive refraction power, including three cemented lenses, a third group of lenses with negative refraction power, including three cemented lenses, in which the side that faces the image plane is convex, a fourth group of lenses, consisting of a lens with positive refraction power and a cemented group of two lenses with positive-negative refraction power, and a fifth group of lenses, including two lenses in a cemented group with negative-positive refraction power.

Materials and methods for fabricating and using negative index materials are disclosed. A negative index material comprises a three-dimensional volume including a bulk solution and a plurality of unit cells disposed in the bulk solution in a substantially random pattern. Each unit cell comprises a periodic hole array pattern on a substrate or a resonator formed on a first surface of a substrate, and a thin wire pattern formed on a second surface of the substrate. The combination of the unit cells in the bulk solution produces a negative effective permeability and a negative effective permittivity over a frequency band of interest for the three-dimensional volume. The negative index material may be used to focus radiation by directing an incident radiation at the negative index material and generating a focused radiation by a negative refraction of the incident radiation in the negative index material.