A kind of lens and its composed lens group and application

Abstract

The invention discloses a lens. The lens comprises a transparent body. The incident plane of the transparent body is a plane, the emitting surface of the transparent body is a curved surface satisfying a specific differential formula, and the three-dimensional contour of the curved surface changes only in two directions. A plurality of the lens are uniformly inlaid in a base to form a lens battery which can also be applied to a high-speed coaxial linearity laser scanner. According to the invention, the three-dimensional contour of the curved surface of the lens change only in two directions, so that multiple same lenses can be simultaneously polished during production of the lens, the lens is suitable for batch production, the lens battery composed of the lens, when rotating by taking a line which passes through the center point of the base of the lens battery and is vertical to the base as a rotation axis, can realize coaxial linearity scanning of laser, and when the lens battery is applied to the scanner, high-speed coaxial linearity scanning of the laser can be realized.

Description

technical field [0001] The invention relates to a lens and its lens group and its application, especially to a lens suitable for mass production that can realize high-speed rotary coaxial linear scanning of lasers, its lens group and its application, and belongs to optical technology field. Background technique [0002] With the development of science and technology and the needs of production, laser scanning technology has been widely used and developed, especially in the fields of laser scanning microscopic imaging, laser printing, laser cutting and other fields. [0003] Scanning mirror is a key part of laser scanning technology. The current common technology is mainly reflective scanning, among which rotating polygonal mirror reflective scanning is the most widely used. However, reflective scanning cannot be coaxial. , increasing the system error, and increasing the volume of the system; and in reflective high-speed scanning, the more commonly used high-speed rotating p...

AI Technical Summary

Problems solved by technology

[0003] Scanning mirror is a key part of laser scanning technology. The current common technology is mainly reflective scanning, among which rotating polygonal mirror reflective scanning is the most widely used. However, reflective scanning cannot be coaxial. , increasing the system error, and increasing the volume of the system; and in reflective high-speed scanning, the more commonly used high-speed rotating polygon mirror has the characteristics that its reflection plane is parallel to the rotation axis, which causes the deformation of the polygon mirror surface during high-speed rotation , thus reducing the scanning speed and accuracy

[0004] The existing coaxial scanning technology generally has the disadvantage of being unable to perform linear scanning or high cost. Therefore, it is necessary to design a lens that can realize high-speed coaxial linear scanning and is suitable for mass production to reduce production costs.

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