Han's Laser Technology Industry Group Co., Ltd.

Han's Cnc Science and Technology Co., Ltd

The South China University of Technology

Guangzhou Shunhai Shipyards Ltd.

Beibu Gulf University

Yuqing Chen

Bo Sun

Yunfeng Gao

Jiaying Li

Chaoming Zhou

Jiaming Wu

Xiangxi Han

Xiaokun Hou

Peng Dai

Linhua Li

Zhiquan Ma

A positioning and rescue device for an unmanned underwater vehicle, comprising a battery (), a switch (), a protective resistor (), an electromagnetic relay (), a master control chip (), a GPS positioning system (), an igniter (), a partition (), an air bag (), a shell (), and a rope (). The battery (), the switch (), the protective resistor (), the electromagnetic relay () and the master control chip () are sequentially connected by means of wires to form a series circuit, and the igniter () and the GPS positioning system () are separately connected to the master control chip () by means of wires; two normally open contacts of a control loop of the electromagnetic relay () are respectively connected to two ends of a general power supply ().

Positioning and rescue device for unmanned underwater vehicle

An optical lens for laser marking includes a first lens (L), a second lens (L), and a third lens (L), which are successively coaxially arranged along a transmission direction of incident light, wherein the first lens (L) and the second lens (L) are meniscus lenses, and the third lens (L) is a biconvex lens; wherein the first lens (L) has a first surface (S) and a second surface (S), the second lens (L) has a third surface (S) and a fourth surface (S), the third lens (L) has a fifth surface (S) and a sixth surface (S); the first surface (S) to the sixth surface (S) are successively arranged along the transmission direction of the incident light; wherein radii of curvature of the first surface to the sixth surface are &#x2212;47&#xb1;5% mm, &#x221e;, &#x2212;218&#xb1;5% mm, &#x2212;81&#xb1;5% mm, 778&#xb1;5% mm, and &#x2212;142&#xb1;5% mm, respectively; wherein central thicknesses of the first lens, the second lens, and the third lens are 4&#xb1;5% mm, 15&#xb1;5% mm, and 18&#xb1;5% mm, respectively. The optical lens for laser marking not only has high engraving quality, but also has a high engraving speed with a higher efficiency than conventional engraving lens.

Optical lenses for laser marking

An optical lens comprising a first lens (L), a second lens (L), a third lens (L), a fourth lens (L), and a fifth lens (L) that are sequentially arranged on a common optical axis in the transmission direction of an incident light. Both the first lens (L) and the fifth lens (L) are negative meniscus lenses. Both the second lens (L) and the third lens (L) are positive meniscus lenses. The fourth lens (L) is a biconvex lens. The optical lens is applicable in an optical system of a laser processing apparatus. When an employed processing wavelength is different from a monitoring wavelength, imaging color differences in a monitoring system can thus be eliminated, specifically, when a wavelength in the infrared range is employed as a laser processing wavelength while a red wavelength serves as the monitoring wavelength, improved imaging effects are provided in the monitoring system, thus ensuring the quality of laser processing.

Optical lens

A telecentric optical lens (), comprising a first lens (L) to a fifth lens (L) arranged sequentially and co-axially along the direction of transmission of the incident light ray; the first lens (L) is a plano-concave negative lens; the second lens (L) is a meniscus negative lens; the third lens (L) is a meniscus negative lens; the fourth lens (L) is a biconvex positive lens; and the fifth lens (L) is a plano-concave negative lens; the arrangement and design parameters of the first lens (L) to the fifth lens (L) of the telecentric optical lens () allow said telecentric optical lens () to achieve a telecentric effect, and simultaneously satisfy achromatic and relatively large aperture requirements.

Telecentric optical lens

An infrared laser zoom beam expanding system, applied to the field of laser processing, and comprising a first lens, a second lens and a third lens. The first lens and the third lens are plane-convex plus lenses, and the second lens is a meniscus minus lens. The first lens, the second lens and the third lens respectively comprise a first surface and a second surface, a third surface and a fourth surface as well as a fifth surface and a sixth surface. The radiuses of curvature of the first to sixth surfaces are &#x221e;, &#x2212;27, 10, 1.7, &#x221e;, &#x2212;103. The center thickness of the first to third lenses is 2, 1, 4. The outer diameters of the first to third lenses are 10, 3, 34. Proportions of the refractive indexes to the Abbe numbers of the first to third lenses are 1.8:25, 1.48:68, and 1.8:25. A distance between the second surface and the third surface is 10-27. An distance between the fourth surface and the fifth surface is 119-125, The unit is millimeter, and a tolerance is 5%. The system may perform beam expanding on entering light by 2-16 times, which may be adaptable to laser devices with different emergent diameters and divergence angles, and improve efficiency and accuracy of laser processing.

Infrared laser zoom beam expanding system and laser processing equipment

A green laser zoom beam expanding system, applied to the field of laser processing, and comprising a first lens, a second lens and a third lens (L, L, L). The first lens and the third lens (L, L) are plane-convex plus lenses, and the second lens (L) is a meniscus minus lens. The first lens, the second lens and the third lens (L, L, L) respectively comprise a first surface and a second surface (S, S), a third surface and a fourth surface (S, S) as well as a fifth surface and a sixth surface (S, S). The radiuses of curvature of the first to sixth surfaces (S, S, S, S, S, S) are &#x221e;, &#x2212;29.8, 7.2, 1.6, &#x221e;, &#x2212;100. The center thickness of the first to third lenses (L, L, L) is 2, 1, 4. The outer diameters of the first to third lenses (L, L, L) are 10, 3, 34. Proportions of the refractive indexes to the Abbe numbers of the first to third lenses (L, L, L) are 1.8:25, 1.48:68, and 1.8:25. An interval (d) between the second surface and the third surface (S, S) is 8-28. An interval (d) between the fourth surface and the fifth surface (S, S) is 107-115, a unit is mm, and a tolerance is 5%. The system may perform beam expanding on entering light by 2-16 times, which may be adaptable to laser devices with different emergent diameters and divergence angles, and improve efficiency and accuracy of laser processing.

Green laser zoom beam expanding system and laser processing equipment

An ultraviolet laser zoom beam expanding system, applied to the field of laser processing, includes a first lens, a second lens, and a third lens (L, L, L). The first lens and the third lens (L, L) are plane-convex plus lenses, and the second lens (L) is a convex-concave minus lens. The first lens, the second lens and the third lens (L, L, L) respectively comprise a first surface and a second surface (S, S), a third surface and a fourth surface (S, S) as well as a fifth surface and a sixth surface (S, S). The radiuses of curvature of the first to sixth surfaces (S, S, S, S, S, S) are &#x221e;, &#x2212;30, 10, 2.2, &#x221e;, &#x2212;81. The center thickness of the first to third lenses (L, L, L) is 2, 1, 4. The outer diameters of the first to third lenses (L, L, L) are 10, 3, 34. Proportions of the refractive indexes to the abbe numbers of the first to third lenses (L, L, L) are 1.57:41, 1.48:68, and 1.57:41. An interval (d) between the second surface and the third surface (S, S) is 6-37. An interval (d) between the fourth surface and the fifth surface (S, S) is 114-125, a unit is mm, and a tolerance is 5%. The system may perform beam expanding on entering light by 2-16 times, which may be adaptable to laser devices with different emergent diameters and divergence angles, and improve efficiency and accuracy of laser processing.

Growing community of inventors

Guangdong, China

Yuqing Chen