31results about How to "Strong light transmission ability" patented technology

The invention provides an optical imaging lens. The optical lens comprises first, second, third, fourth and fifth lens bodies, wherein the focal power of the first lens body is negative; the focal power of the second lens body is positive; the third and fourth lens bodies form an achromatic lens group; and the focal power of the fifth lens body is positive, and the fifth lens body includes at least one aspheric surface.

An ultra wide-angle lens, including successively from object space to image space: a first lens (L1) and a second lens (L2) having negative focal power, a third lens (L3) having positive focal power, a fourth lens (L4) having negative focal power and a fifth lens (L5) having positive focal power. A gluing lens having positive focal power is formed by gluing the fourth lens (L4) and the fifth lens (L5) together, which satisfies BFL / EFL = 2.4, where BFL is the distance between the most exterior point on the image space side of the fifth lens and the imaging surface in the ultra wide-angle lens, and EFL is the focal length of the ultra wide-angle lens. In the case of a shorter total length TTL, an ultra wide-angle lens has a comparatively longer lens back focal length BFL, to satisfy the requirement for larger-sized peripheral electronics of an imaging sensor during camera design, and a longer BFL causes lens components and optical filters to be located at a farther position from the imaging sensor, which can effectively lower the requirements of cleanliness of the surface of each lens component and optical filter, and make the assembly and manufacturing of cameras much easier.

The invention provides a fringe projection lens for three-dimensional measurement. The fringe projection lens comprises a front lens group having negative focal power, a diaphragm and a rear lens group having positive focal power in sequence from an object side to an image side. The front lens group comprises a first lens, a second lens and a third lens in sequence from the object side to the image side. The first lens is a meniscus lens having negative focal power; the second lens is a biconcave lens having negative focal power; and the third lens is a biconvex lens having positive focal power. The rear lens group comprises a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from the object side to the image side. The fourth lens is a biconvex lens having positive focal power; the fifth lens is a biconcave lens having negative focal power; the sixth lens is a biconvex lens having positive focal power; and the seventh lens is a meniscus lens having negative focal power. The fringe projection lens can realize low cost, light weight, small distortion, small size and high light transmission performance, and meets high-definition projection requirement.

The invention relates to an optimal lens. The optical lens sequentially comprises a front lens group, a diaphragm element and a rear lens group from an object space to an image space, wherein the front lens group has positive focal power; the rear lens group has positive focal power; the front lens group sequentially comprises a crescent first lens and a double-convex second lens from the object space to the image space; the crescent first lens has negative focal power; a concave surface of the crescent first lens faces the image space; the double-convex second lens has positive focal power; the rear lens group sequentially comprises a double-concave third lens, a crescent fourth lens and a balsaming lens; the double-concave third lens has negative focal power; the crescent fourth lens has positive focal power; a concave surface of the crescent fourth lens faces the object space; the balsaming lens consists of a fifth lens and the sixth lens. The requirements of high pixel, small distortion, large aperture, high light transmitting performance and accordance with high definition are met under the conditions of low cost and small miniaturization are realized; various aberrations of an optical system are effectively corrected; meanwhile, perfect imaging definition can be kept in the temperature of -40DEGC to 85DEG C; the optical lens is specially suitable for monitoring or vehicle-mounted camera systems considering daytime and nighttime or poor illuminating conditions.

The invention belongs to the field of polymer materials and particularly relates to a plastic optical fiber core layer material and a preparation method and application thereof. The composition used for preparing the plastic optical fiber core layer material is prepared from the ingredients, by mass, of 80-90 parts of methyl methacrylate, 3-10 parts of methyl acrylate and 5-15 parts of trifluoroethyl methacrylate. When the prepared plastic optical fiber core layer material is compared with the homopolymerized polymethylacrylic acid material, great improvements are obtained in the aspects of the optical performance, the mechanical property, the thermal property and the like, decay of the plastic optical fiber of the plastic optical fiber core layer material is reduced to some extent, the bandwidth is increased remarkably, the toughness is improved, the brittleness is reduced, the aging resistance is improved to some extent, and the plastic optical fiber core layer material has importantsignificance for the transmission material in the communication field.

The invention provides a wide-angle lens which comprises a front lens set with negative focal power, a diaphragm and a rear lens set with positive focal power from an object space to an image space in sequence. The front lens set comprises a first lens, a second lens and a third lens from the object space side in sequence, wherein the first lens is a negative meniscus lens protruding towards the object space, the second lens is a negative meniscus lens or a biconcave lens, and the third lens is a biconvex positive focal power lens. The rear lens set comprises a fourth lens, a fifth lens and a sixth lens from the object space side in sequence, wherein the fourth lens and the fifth lens form a bonding lens, the fourth lens has positive focal power, the fifth lens has negative focal power, the sixth lens is a biconvex positive focal power lens, and at least four lens contained in the lens from the second lens to the sixth lens are aspheric lenses. The wide-angle lens is low in cost, low in weight, little in distortion, small in size, high in light pervious performance and capable of meeting the requirement of high definition.

The utility model provides an optical imaging camera lens, it includes first lens, wherein these first lens have negative optical power, second lens, wherein these second lens have positive refractive power, third lens, fourth lens, wherein an achromatic lens group is formed with these fourth lens to these third lens, with one the 5th lens, wherein the 5th lens have positive refractive power, and the 5th lens have at least one aspheric surface.

The invention discloses an optical imaging lens and an imaging device. The optical imaging lens comprises in sequence from the object side to the imaging surface along the optical axis: a first lens, a second lens, a diaphragm, a third lens, a fourth lens, and a fifth lens. Lens, sixth lens and optical filter; the first lens is a meniscus lens with negative power, its object side is convex, and its image side is concave; the second lens has negative power, its object side is concave , the image side is convex; the diaphragm is set between the second lens and the third lens; the third lens has positive power, and its object side and image side are convex; the fourth lens has positive power, and its object side and The image side is convex; the fifth lens has negative power, and the object side and the image side are concave; the sixth lens has positive power, and the object side and the image side are convex. The optical imaging lens provided by the invention has the characteristics of super high resolution, good thermal stability, large aperture, convenient assembly and the like.

The invention discloses a monitoring zoom lens and a video camera with the zoom lens. The monitoring zoom lens includes: a front fixed group lens; a rear fixed group lens; a diaphragm, which is arranged between the front fixed group lens and the rear fixed group lens; a zoom group lens, which is movably arranged on the lens and located between the front fixed lens group and the diaphragm; and a focusing group lens, which is movably arranged in the lens and located behind the diaphragm and the rear fixed group lens, wherein the monitor The maximum aperture of the zoom lens when used at the maximum focal length end is the same as its maximum aperture when used at the minimum focal length end; and the maximum aperture of the monitored zoom lens when used at the intermediate focal length segment is the same as the maximum aperture when used at the minimum focal length end same. The beneficial effect of the present invention is that the maximum aperture of the lens will not be reduced when the lens is used at any focal length; compared with other lenses, the camera used with this lens has a better low-light effect.

The invention discloses a high-definition lens. A front lens group, a diaphragm, a rear lens group and an imaging surface are successively arranged from an object side to an image side, wherein the front lens group has the positive focal power; the rear lens group has the positive focal power; the front lens group comprises a first lens, a second lens and a third lens which are successively arranged from the object side to the image side; the focal power of the first lens and the focal power of the second lens are negative; the focal power of the third lens is positive; the rear lens group comprises a fourth lens, a fifth lens and a sixth lens which are successively arranged from the object side to the image side; the focal power of the fourth lens and the focal power of the sixth lens are positive; the focal power of the fifth lens is negative; the third lens, the fourth lens, the fifth lens and the sixth lens are all arranged as plastic aspherical lenses. The high-definition lens has the advantages of wide field angle, low cost, high definition and strong optical power.

The invention discloses glass suitable for a trough photo-thermal power generation heat collection tube, belonging to a borosilicate glass system. The glass can be used for preparing high-precision glass tube by using a public known vertical, horizontal or connecting pull tube forming process and meets the requirement of a glass tube for a heat collector required by a trough photo-thermal power generation technology. The glass has high visible light and infrared transmissivity, good sealing-in performance with metals, high mechanism strength, good solarization resistance and high chemical stability, has the thermal expansion coefficient of (38-60)*10<-7> / DEG C and can meet the requirements for the matched sealing-in and the gas tightness of tungsten, molybdenum and kovar alloy. The glass comprises the chemical components in percentage by weight: 68-78% of SiO2, 5.2-8.0% of B2O3, 4.8-6.5% of Al2O3, 0.05-0.50% of Li2O, 2.4-8% of Na2O, 0.6-3.0% of K2O, 4-9% of CaO and 0.15-0.40% of SnO2.The glass has better melting quality, can meet the requirement of a high-precision forming process, does not contain As2O3, Sb2O3, SO3 and other harmful components, is environment friendly and can prevent the glass from becoming black on the surface and generating air bubbles when the glass is subjected to sealing-in treatment.