West Lafayette, IN, United States
West Lafayette, IN, United States

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A homogeneous pump structure of laser, and a design method for the homogeneous pump structure of laser. The homogeneous pump structure of laser is used in a fiber laser or a fiber laser amplifier, and comprises a gain fiber (21). The gain fiber (21) comprises a pump light input end and a pump light output end. The pump area of the gain fiber (21) gradually decreases from the pump light input end to the pump light output end, so that a change rate between a pump light absorption capacity of each of segments, with equal lengths, of the gain fiber (21) and a pump light absorption capacity of a neighboring segment is smaller than b %, b being an empirical value.


Patent
Hans Tech | Date: 2016-10-10

A molten metal processing device including a molten metal containment structure for reception and transport of molten metal along a longitudinal length thereof. The device further includes a cooling unit for the containment structure including a cooling channel for passage of a liquid medium therein, and an ultrasonic probe disposed in relation to the cooling channel such that ultrasonic waves are coupled through the liquid medium in the cooling channel and through the molten metal containment structure into the molten metal.


Patent
Hans Tech | Date: 2014-05-19

The invention concerns a high-performance tungsten-based super battery system, which relates to an integrated design and a construction method of a corresponding material, a structure and a process. In the technology, a tungsten-based material is used a negative electrode, and a high-specific-surface-area carbon or lead oxide is used as a positive electrode to assemble four types of super batteries comprising: 1) a tungsten-carbon super battery, 2) a tungsten-tungsten super battery, 3) a tungsten-lead oxide super battery, and 4) a super battery system of a hybridized tungsten super battery (comprising lead oxide, lead, and a carbon material) on which the foregoing two types of super batteries are hybridized in use. The introduction of the tungsten-based material endows a novel class of super batteries with higher power density, higher energy density, longer cycling life, high durability and reliable safety. This will enable a broad range of applications.


Patent
Hans Tech | Date: 2016-02-09

A molten metal processing device including a molten metal containment structure for reception and transport of molten metal along a longitudinal length thereof. The device further includes a cooling unit for the containment structure including a cooling channel for passage of a liquid medium therein, and an ultrasonic probe disposed in relation to the cooling channel such that ultrasonic waves are coupled through the liquid medium in the cooling channel and through the molten metal containment structure into the molten metal.


An F lens and a laser processing device for far-infrared laser processing are provided. The F lens for far-infrared laser processing comprises a first lens (L1), a second lens (L2) and a third lens (L3) which are coaxially arranged successively along a transmission direction of incident light beams, wherein the first lens is a negative meniscus lens, and the second lens and the third lens are positive meniscus lenses; and all the middle parts of the first lens, the second lens and the third lens protrude towards the transmission direction of incident light beams. The F lens can improve the imaging quality and the resolution distance, effectively calibrate the astigmatism and distortion of the lens, reduce the influence of high-order aberrations, and has a high degree of energy concentration of laser focus points and high processing accuracy, thereby meeting the requirements for cutting or drilling. The F lens is miniaturized, so that the volume of the lens is effectively controlled, and costs are reduced.


An F lens for extreme ultraviolet laser marking assembly and a laser processing device are provided. The lens assembly includes a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4) successively coaxially arranged along a transmission direction of an incident laser. The first lens (L1) is a biconcave negative lens; the second lens (L2) is a falcate negative lens; the third lens (L3) is a falcate positive lens; and the fourth lens (L4) is a biconvex positive lens; and an intermediate part of the second lens (L2) and the third lens (L3) are both convex toward a transmission direction of the laser. A proportion of the refractive index of the first, the second, the third and the fourth lenses to the abbe number is 1.476/68, with a tolerance of 5%. By means of the design of the four lenses and relative positions therebetween, astigmatism and distortion are effectively corrected, and the focusing degree of the energy is high. Imaging and marking of high quality are achieved; imaging quality is improved, and the structure of the lens assembly is simple, which is convenient for designing and appropriate for various laser processing devices.


A near-infrared laser focusing lens and a laser printing device are provided. The lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens (L1, L2, L3, L4, L5) which are coaxially arranged along a transmission direction of incident light rays, wherein the first lens (L1) is a negative plane-concave lens; the second lens and the third lens (L2, L3) are positive biconvex lenses; and the fourth lens and the fifth lens (L4, L5) are positive meniscus lenses; and a concave surface (S2) of the first lens (L1) is opposite to the second lens (L2), and the middle parts of the fourth lens and the fifth lens (L4, L5) both reversely protrude towards the transmission direction of light beams. After the shapes and the relative locations of the lenses are designed, the near infrared light can be clearly imaged, and the geometrical aberration of the lens can be effectively corrected, so as to obtain a clear flat field. In addition, because of having a large relative aperture and visual field and a long working distance, the lens is a microscope objective simultaneously having a large visual field, a large relative aperture, a long working distance and a flat field, and is capable of improving printing precision and clarity, so that the color rendition is truer and the operation is more convenient.


Patent
Hans Tech | Date: 2016-08-31

The invention concerns a high-performance tungsten-based super battery system, which relates to an integrated design and a construction method of a corresponding material, a structure and a process. In the technology, a tungsten-based material is used a negative electrode, and a high-specific-surface-area carbon or lead oxide is used as a positive electrode to assemble four types of super batteries comprising: 1) a tungsten-carbon super battery, 2) a tungsten-tungsten super battery, 3) a tungsten- lead oxide super battery, and 4) a super battery system of a hybridized tungsten super battery (comprising lead oxide, lead, and a carbon material) on which the foregoing two types of super batteries are hybridized in use. The introduction of the tungsten-based material endows a novel class of super batteries with higher power density, higher energy density, longer cycling life, high durability and reliable safety. This will enable a broad range of applications.


Patent
Hans Tech | Date: 2013-11-22

A radial polarization disk laser, including a pumping source, a collimator lens, a focusing lens, a laser gain medium, a Brewster axial cone, and a output lens, which are sequentially arranged along a laser light path. An angle formed between the conical surface and the bottom surface of said Brewster axial cone is a Brewsters angle. Said laser gain medium is bonded with said bottom surface; said laser gain medium and said output lens form a laser harmonic oscillator cavity therebetween. The pumped laser light emitted by said pumping source passes through said collimator lens and said focusing lens, then is focused on the laser gain medium, and. the generated photons oscillate in said laser harmonic oscillator cavity, and then a radial polarized laser beam is finally output by said output lens.


Patent
Hans Tech | Date: 2015-09-09

A zoom lens assembly for monitor and a monitoring device are provided. The lens assembly comprises a first to a thirteenth lenses (LI-LI3) arranged successively coaxially along the transmission direction of an incident light beam. The first, the eighth, the tenth and the twelfth lenses (L1, L8, L10 and L12) are biconvex positive lenses; the second, the ninth and the eleventh lenses (L2, L9 and L11) are falcate negative lenses; the third, the fourth, the sixth and the thirteenth lenses (L3, L4, L6 and L13) are falcate positive lenses; the fifth lens (L5) is a biconcave negative lens; and the seventh lens (L7) is a plano-concave negative lens. The second and the third lenses (L2 and L3) are closely adhered to each other, and the sixth and the seventh lenses (L6 and L7) are closely adhered to each other. The intermediate parts of the second, the third, the fourth and the thirteenth lenses (L2, L3, L4 and L13) are all convex toward a direction reverse to the transmission direction an incident light beam; the intermediate parts of the sixth, the ninth and the eleventh lenses (L6, L9 and L11) are all convex toward the transmission direction of the incident light beam; and the fifth, the sixth and the seventh lenses (L5, L6 and L7) can move synchronously along a light axis direction. The shot can realize all-weather, wide-range and variofocusing monitoring. The shot has a high imaging sharpness and a simple structure; and the cost of the material is low, thus controlling the manufacturing cost effectively.

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