Search

CN-121977798-A - Microlens array consistency detection device

CN121977798ACN 121977798 ACN121977798 ACN 121977798ACN-121977798-A

Abstract

The invention discloses a micro-lens array consistency detection device which comprises a light source assembly, a beam expanding assembly, a reflecting mirror assembly, a five-dimensional adjusting frame, a micro-lens array and a camera assembly, wherein the light source assembly is used for emitting laser, the beam expanding assembly can output light spots with different sizes, the reflecting mirror assembly is used for turning a light path, the five-dimensional adjusting frame can adjust displacement and angles in multiple directions, the micro-lens array is arranged on the five-dimensional adjusting frame, and the camera assembly is used for processing incident light passing through a surface unit of the micro-lens array. The micro-lens array consistency detection device is strong in light path adaptability and flexible in detection, the beam expanding assembly can output light spots with different sizes through diaphragm aperture adjustment and adapt to micro-lens array detection with different specifications, the reflector assembly realizes flexible light path folding, space layout is optimized, multiple detection scenes can be adapted without greatly adjusting core devices, and the device is strong in universality. The light path design maximally reduces light energy loss, and effectively improves light beam distribution uniformity and energy utilization rate.

Inventors

  • ZHU HONGXIANG
  • WU HONGBO

Assignees

  • 中国科学院长春光学精密机械与物理研究所

Dates

Publication Date
20260505
Application Date
20260320

Claims (5)

  1. 1. A device for detecting the consistency of micro-lens array, the detecting device is characterized by comprising: a light source assembly for emitting laser light; The beam expanding component (3) can output light spots with different sizes; the detection device further includes: a mirror assembly for deflecting the light path; The five-dimensional adjusting frame (7) can adjust the displacement and the angle of a plurality of directions; a microlens array (6) located on the five-dimensional adjustment frame (7); A camera assembly (8) capable of processing light incident through the surface unit of the microlens array (6); An image processing system (9) capable of processing the information arriving in the camera assembly (8) and evaluating the consistency of the microlens array (6); And a workbench (10) arranged on one side of the camera component (8).
  2. 2. A microlens array uniformity inspection apparatus according to claim 1, wherein said beam expanding assembly (3) comprises a second support structure (301), and A diaphragm (302) arranged at one side of the second supporting structure (301), wherein the aperture size of the diaphragm (302) is changed, so that light spots with different sizes can be output; a fifth lens (303) and a sixth lens (304), the sixth lens (304) outputting parallel light to the mirror assembly.
  3. 3. A microlens array consistency detection device according to claim 1, characterized in that the mirror assembly comprises a first mirror (4) and a second mirror (5), the sixth lens (304) outputting parallel light to the first mirror (4), and the second mirror (5) receiving parallel light from the first mirror (4) and reflecting to the microlens array (6).
  4. 4. A microlens array uniformity detection apparatus according to claim 1, wherein said camera assembly (8) comprises a camera (801), and -A first support structure (802) arranged on the camera (801); A first lens (803), a second lens (804), a third lens (805) and a fourth lens (806) are respectively fixed on the first supporting structure (802).
  5. 5. The microlens array consistency detection device according to claim 1, wherein the light source assembly comprises a light source controller (1) and a light source (2), and the light source (2) is controlled by the light source controller (1) to emit laser light with different powers and different frequencies.

Description

Microlens array consistency detection device Technical Field The invention relates to the technical field of optical-mechanical structures, in particular to a micro-lens array consistency detection device. Background The light field camera realizes four-dimensional light field information acquisition of space light intensity and light ray propagation direction by integrating a Micro Lens Array (MLA) between the main lens and the image sensor, and provides a hardware basis for later refocusing, depth of field expansion, three-dimensional reconstruction and the like. The micro lens array is used as a core optical component of the light field camera and is formed by arranging a large number of micro-scale sub lenses according to a certain rule, and the material selection, the surface design, the array arrangement and the processing consistency of the micro lens array directly determine the light field acquisition precision, the imaging quality and the system light energy utilization rate. The conventional microlens array generally adopts a regular pattern tangential arrangement or gap arrangement mode, so that the sub-images formed on the image sensor are tangential or gap distributed, the problems of low photosensitive area utilization rate, sub-image overlapping or undersampling and the like are directly caused, meanwhile, the conventional area array arrangement mode is difficult to consider the optical efficiency, the angle sampling density and the aberration control, and the array consistency is poor. The defects can directly lead to the reduction of uniformity, insufficient edge steepness and reduced shape fidelity after the light beam shaping, and the utilization rate of light energy is limited, so that the application requirements of high-precision light field imaging and high-quality light beam shaping cannot be met. Based on the above technical problems, a need exists for developing a microlens array uniformity detection device with a simple structure, which can improve the uniformity of beam distribution and the energy utilization rate. Disclosure of Invention The invention aims to provide a device for detecting the consistency of a micro lens array, which can effectively detect the consistency of the micro lens array and improve the uniformity of light beam distribution and the energy utilization rate. In order to achieve the above object, the present invention provides the following technical solutions: the invention provides a microlens array consistency detection device, which comprises: a light source assembly for emitting laser light; the beam expanding assembly can output light spots with different sizes; the detection device further includes: a mirror assembly for deflecting the light path; the five-dimensional adjusting frame can adjust displacement and angles in multiple directions; A microlens array located on the five-dimensional adjustment frame; A camera assembly capable of processing light incident through the microlens array surface unit; an image processing system capable of processing information arriving in the camera assembly and evaluating the consistency of the microlens array; And the workbench is arranged on one side of the camera component. Further, the beam expanding assembly includes a second support structure, and The diaphragm is arranged on one side of the second supporting structure, the aperture size of the diaphragm is changed, and light spots with different sizes can be output; a fifth lens and a sixth lens that outputs parallel light to the mirror assembly. Further, the mirror assembly includes a first mirror and a second mirror, the sixth lens outputs parallel light to the first mirror, and the second mirror receives the parallel light from the first mirror and reflects to the microlens array. Further, the camera assembly includes a camera, and A first support structure disposed on the camera; The first support structure is respectively fixed with a first lens, a second lens, a third lens and a fourth lens. Further, the light source assembly comprises a light source controller and a light source, and the light source controller is used for controlling the light source to emit laser with different powers and different frequencies. In the technical scheme, the microlens array consistency detection device provided by the invention has the following beneficial effects: The micro-lens array consistency detection device is strong in light path adaptability and flexible in detection, the beam expanding assembly can output light spots with different sizes through diaphragm aperture adjustment and adapt to micro-lens array detection with different specifications, the reflector assembly realizes flexible light path folding, space layout is optimized, multiple detection scenes can be adapted without greatly adjusting core devices, and the device is strong in universality. The light source component can output laser with different powers and frequencies, forms uniform parallel