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CN-224232053-U - Uniform light collimation lens module

CN224232053UCN 224232053 UCN224232053 UCN 224232053UCN-224232053-U

Abstract

The utility model discloses a light-homogenizing collimating lens module, which comprises a laser light source for emitting laser beams, and a first lens and a second lens which are sequentially arranged in the propagation direction of the laser beams, wherein the laser beam incident surface of the first lens is a plane or a spherical surface, the laser beam emergent surface of the first lens is a free curved surface, the laser beam incident surface of the second lens is a free curved surface, the laser beam emergent surface of the second lens is a plane or a spherical surface, the first lens is a rectangular lens, and the second lens is a round lens. According to the technical scheme provided by the embodiment of the utility model, the laser beam output by the laser source is effectively collimated and homogenized through the synergistic effect of the first lens and the second lens, so that the maximum and minimum illuminance difference of the shaped laser beam on the target surface is controlled within 15%, and the high requirements on the collimation and uniformity of the laser beam are met.

Inventors

  • YANG HAO

Assignees

  • 苏州润远光学有限公司

Dates

Publication Date
20260512
Application Date
20250527

Claims (10)

  1. 1. A light homogenizing collimating lens module, comprising: A laser light source for emitting a laser beam; A first lens and a second lens which are sequentially arranged in the propagation direction of the laser beam; the laser beam incident surface of the first lens is a plane or a spherical surface; the laser beam emergent surface of the first lens is a free-form surface; the laser beam incident surface of the second lens is a free-form surface; The laser beam emergent surface of the second lens is a plane or a spherical surface; the first lens is a rectangular lens, and the second lens is a circular lens.
  2. 2. The dodging collimator lens module as recited in claim 1, wherein, The laser beam emergent surface of the first lens is a concave surface; The laser beam incident surface of the second lens is a convex surface.
  3. 3. The dodging collimator lens module as recited in claim 1, wherein, The laser beam incident surface of the first lens is a plane; the laser beam emergent surface of the second lens is a plane.
  4. 4. The dodging collimator lens module as recited in claim 1, wherein, The laser beam incident surface of the first lens, the laser beam emergent surface of the second lens and the laser beam incident surface of the second lens are provided with anti-reflection coatings.
  5. 5. The dodging collimator lens module as recited in claim 1, wherein, The first lens is a plastic lens, or the material of the first lens comprises plastic and glass; the second lens is a plastic lens, or the material of the second lens comprises plastic and glass.
  6. 6. The dodging collimator lens module as recited in claim 1, wherein, The first lens has a blackened side.
  7. 7. The dodging collimator lens module as recited in claim 1, wherein, The diameter of the second lens is larger than the length of the first lens; The distance between the laser beam incident surface of the first lens and the laser beam emergent surface of the second lens is less than or equal to 30mm.
  8. 8. The dodging collimator lens module as recited in claim 1, wherein, The light spot of the laser beam emitted by the laser source is in an elliptical shape; And the shape of the light spot of the laser beam after being shaped by the dodging collimation lens module is round.
  9. 9. The dodging collimator lens module as recited in claim 1, wherein, The power of the laser light source is 5mW to 200mW.
  10. 10. The dodging collimator lens module as recited in claim 1, wherein, The diameter of the light spot of the laser beam after being shaped by the dodging collimating lens module is 3mm to 10mm.

Description

Uniform light collimation lens module Technical Field The utility model relates to the technical field of optical engineering, in particular to a uniform light collimating lens module. Background The laser technology has wide application in various fields such as industrial processing, medical equipment, scientific research experiments and the like. However, laser beam shaping in the conventional laser system is realized only by means of a single lens, the shaped laser beam is relatively concentrated, the energy of a light spot is unevenly distributed, and high requirements on the collimation and uniformity of the laser beam are difficult to meet. Disclosure of utility model The utility model provides a uniform light collimation lens module for improving the collimation and uniformity of laser beams. According to an aspect of the present utility model, there is provided a dodging collimation lens module, including: A laser light source for emitting a laser beam; A first lens and a second lens which are sequentially arranged in the propagation direction of the laser beam; the laser beam incident surface of the first lens is a plane or a spherical surface; the laser beam emergent surface of the first lens is a free-form surface; the laser beam incident surface of the second lens is a free-form surface; The laser beam emergent surface of the second lens is a plane or a spherical surface; the first lens is a rectangular lens, and the second lens is a circular lens. Optionally, the laser beam emergent surface of the first lens is a concave surface; The laser beam incident surface of the second lens is a convex surface. Optionally, the laser beam incident surface of the first lens is a plane; the laser beam emergent surface of the second lens is a plane. Optionally, an anti-reflection coating is disposed on the laser beam incident surface of the first lens, the laser beam emitting surface of the second lens, and the laser beam incident surface of the second lens. Optionally, the first lens is a plastic lens, or the material of the first lens includes plastic and glass; the second lens is a plastic lens, or the material of the second lens comprises plastic and glass. Optionally, the first lens has a blackened side. Optionally, the diameter of the second lens is greater than the length of the first lens; The distance between the laser beam incident surface of the first lens and the laser beam emergent surface of the second lens is less than or equal to 30mm. Optionally, the light spot of the laser beam emitted by the laser light source is in an elliptical shape; And the shape of the light spot of the laser beam after being shaped by the dodging collimation lens module is round. Optionally, the power of the laser light source is 5mW to 200mW. Optionally, the spot diameter of the laser beam after being shaped by the dodging collimation lens module is 3mm to 10mm. According to the technical scheme provided by the embodiment of the utility model, the first lens plays roles of refraction and dispersion, and also plays a role of a diaphragm, so that laser energy is selectively brought into the whole uniform light collimating lens module, a higher laser power utilization rate (more than or equal to 75%) is ensured, and meanwhile, collimation and uniform light effects are simultaneously considered. The collimation and uniformity of the laser beam 20 are realized through the second lens L2, the laser beam output by the laser source is effectively collimated and uniformly processed through the cooperative work of the first lens and the second lens, and finally the maximum and minimum illuminance difference of the shaped laser beam on the target surface is controlled within 15%, so that the high requirements on the collimation and uniformity of the laser beam are met. It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Fig. 1 is a schematic structural diagram of a light-homogenizing collimating lens module according to an embodiment of the present utility model; Fig. 2 is a schematic structural diagram of another dodging collimating lens module according to an embodiment of the present utility model; fig. 3 is a schematic structural diagram of another light-homogenizing collimating lens module according to an embodiment of the present