摘要:
An Fθ lens for infrared large-format telecentric laser marking is disclosed, including a first lens element, a second lens element, a third lens element and a fourth lens element arranged sequentially along the propagation direction of an incident ray. The first lens element is a negative biconcave lens element including a first curved surface and a second curved surface. The second lens element is a positive meniscus lens element including a third curved surface and a fourth curved surface. The third lens element is a positive meniscus lens element including a fifth curved surface and a sixth curved surface. The fourth lens element is a plane lens adapted to play a role in protecting other lens elements. The first to third lens elements are arranged around a same axis along the propagation direction of the incident ray. The first to sixth curved surfaces are arranged sequentially along the propagation direction of the incident ray. The above Fθ lens for infrared large-format telecentric laser marking can be used as an Fθ lens for infrared laser marking, which can meet the telecentric requirement of the large-format laser marking, and control the volume of the lens within an acceptable and applicable range, to achieve miniaturizing of the whole optical system.
摘要:
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.
摘要:
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 (L1, L2, L3). The first lens and the third lens (L1, L3) are plane-convex plus lenses, and the second lens (L2) is a convex-concave minus lens. The first lens, the second lens and the third lens (L1, L2, L3) respectively comprise a first surface and a second surface (S1, S2), a third surface and a fourth surface (S3, S4) as well as a fifth surface and a sixth surface (S5, S6). The radiuses of curvature of the first to sixth surfaces (S1, S2, S3, S4, S5, S6) are ∞, −30, 10, 2.2, ∞, −81. The center thickness of the first to third lenses (L1, L2, L3) is 2, 1, 4. The outer diameters of the first to third lenses (L1, L2, L3) are 10, 3, 34. Proportions of the refractive indexes to the abbe numbers of the first to third lenses (L1, L2, L3) are 1.57:41, 1.48:68, and 1.57:41. An interval (d2) between the second surface and the third surface (S2, S3) is 6-37. An interval (d4) between the fourth surface and the fifth surface (S4, S5) 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.
摘要:
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.
摘要:
A zoom lens assembly for monitor and a monitoring device are provided. The lens assembly comprises a first to a thirteenth lenses (L1-L13) 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.
摘要:
An Fθ lens for infrared large-format telecentric laser marking is disclosed, including a first lens element, a second lens element, a third lens element and a fourth lens element arranged sequentially along the propagation direction of an incident ray. The first lens element is a negative biconcave lens element including a first curved surface and a second curved surface. The second lens element is a positive meniscus lens element including a third curved surface and a fourth curved surface. The third lens element is a positive meniscus lens element including a fifth curved surface and a sixth curved surface. The fourth lens element is a plane lens adapted to play a role in protecting other lens elements. The first to third lens elements are arranged around a same axis along the propagation direction of the incident ray. The first to sixth curved surfaces are arranged sequentially along the propagation direction of the incident ray. The above Fθ lens for infrared large-format telecentric laser marking can be used as an Fθ lens for infrared laser marking, which can meet the telecentric requirement of the large-format laser marking, and control the volume of the lens within an acceptable and applicable range, to achieve miniaturizing of the whole optical system.
摘要:
A large filed achromatic lens is disclosed, including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element arranged sequentially along the propagation direction of an incident ray. The first lens element is a meniscus lens element including a first curved surface and a second curved surface; the second lens element is a meniscus lens element, including a third curved surface and a fourth curved surface; the third lens element is a biconvex lens element, including a fifth curved surface and a sixth curved surface; the fourth lens element is a biconvex lens element, including a seventh curved surface and an eighth curved surface; the fifth lens element is a biconcave lens element including a ninth curved surface and a tenth curved surface; and the sixth lens element is a plane lens element adapted to play a role in protecting other lens elements. The first to the fifth lens elements are arranged around a same axis sequentially along the propagation direction of an incident ray. The first to the tenth curved surfaces are arranged sequentially along the propagation direction of the incident ray. The above large filed achromatic lens can be used as a fine photoetching lens for laser marking, or other fine processing lenses.
摘要:
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 (L1, L2, L3). The first lens and the third lens (L1, L3) are plane-convex plus lenses, and the second lens (L2) is a meniscus minus lens. The first lens, the second lens and the third lens (L1, L2, L3) respectively comprise a first surface and a second surface (S1, S2), a third surface and a fourth surface (S3, S4) as well as a fifth surface and a sixth surface (S5, S6). The radiuses of curvature of the first to sixth surfaces (S1, S2, S3, S4, S5, S6) are ∞, −29.8, 7.2, 1.6, ∞, −100. The center thickness of the first to third lenses (L1, L2, L3) is 2, 1, 4. The outer diameters of the first to third lenses (L1, L2, L3) are 10, 3, 34. Proportions of the refractive indexes to the Abbe numbers of the first to third lenses (L1, L2, L3) are 1.8:25, 1.48:68, and 1.8:25. An interval (d2) between the second surface and the third surface (S2, S3) is 8-28. An interval (d4) between the fourth surface and the fifth surface (S4, S5) 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.
摘要:
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 ∞, −27, 10, 1.7, ∞, −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.
摘要:
A large filed achromatic lens is disclosed, including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element arranged sequentially along the propagation direction of an incident ray. The first lens element is a meniscus lens element including a first curved surface and a second curved surface; the second lens element is a meniscus lens element, including a third curved surface and a fourth curved surface; the third lens element is a biconvex lens element, including a fifth curved surface and a sixth curved surface; the fourth lens element is a biconvex lens element, including a seventh curved surface and an eighth curved surface; the fifth lens element is a biconcave lens element including a ninth curved surface and a tenth curved surface; and the sixth lens element is a plane lens element adapted to play a role in protecting other lens elements. The first to the fifth lens elements are arranged around a same axis sequentially along the propagation direction of an incident ray. The first to the tenth curved surfaces are arranged sequentially along the propagation direction of the incident ray. The above large filed achromatic lens can be used as a fine photoetching lens for laser marking, or other fine processing lenses.