CN113242393B

CN113242393B - Two-dimensional micro light spot array generating device

Info

Publication number: CN113242393B
Application number: CN202110581152.5A
Authority: CN
Inventors: 温强; 朱垚鑫; 金敬文; 闫秋颖; 李平; 陈雨苗; 李东光; 宋德森
Original assignee: Harbin Engineering University
Current assignee: Harbin Engineering University
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2023-04-18
Anticipated expiration: 2041-05-27
Also published as: CN113242393A

Abstract

The invention provides a two-dimensional tiny light spot array generating device, which comprises a control circuit, an LED array, an optical fiber array and an adapter plate, wherein the LED array is arranged on the control circuit; the control circuit respectively controls the luminous intensity of each LED and is provided with a digital communication interface; each LED is coupled with one optical fiber, the optical fiber output end is respectively inserted into the two-dimensional array micropore adapter plate, the light outlet end of each optical fiber penetrates through the two-dimensional array pore adapter plate, the light outlet surface of each optical fiber and the ground of the adapter plate are on the same plane to form a point light source array, the point light source array is imaged through a convex lens to obtain a two-dimensional tiny light spot array, and the control circuit comprises a power supply module, a control module and a communication module. The invention can accurately control each light spot; the light spots can be accurately irradiated to the independent pixels through the light path formed by the optical fiber light guide and the lens group.

Description

Two-dimensional micro light spot array generating device

Technical Field

The invention relates to a two-dimensional tiny light spot array generating device, and particularly belongs to the technical field of electronic component manufacturing.

Background

The compensation method is roughly divided into two aspects, namely effectively inhibiting crosstalk noise through a hardware means in a processing link, and compensating the crosstalk noise through an algorithm in an application link, wherein if the crosstalk noise is compensated through the algorithm, each pixel block needs to be accurately exposed so as to obtain specific parameter data, but the conventional experimental device can only meet the requirement of simultaneously exposing a plurality of pixels and cannot accurately and independently exposing a single pixel block.

Disclosure of Invention

The invention aims to make up for the defects in the prior art, and provides a two-dimensional tiny light spot generating device, so that a single pixel block of an image sensor can be accurately exposed, and more accurate experimental data can be obtained.

The purpose of the invention is realized as follows:

a two-dimensional tiny light spot array generating device comprises a control circuit, an LED array, an optical fiber array and an adapter plate; the control circuit respectively controls the luminous intensity of each LED and is provided with a digital communication interface; each LED is coupled with one optical fiber, the output end of each optical fiber is respectively inserted into the adapter plate of the two-dimensional array micropore, the light outlet end of each optical fiber penetrates through the two-dimensional array adapter plate, the light outlet surface of each optical fiber and the ground of the adapter plate are on the same plane to form a point light source array, and the point light source array is imaged through the convex lens to obtain a two-dimensional tiny light spot array.

The control circuit comprises a power module, a control module and a communication module.

Compared with the prior art, the invention has the beneficial effects that:

(1) Each light spot can be accurately controlled;

(2) The light spots can be accurately irradiated to the independent pixels through the light path formed by the optical fiber light guide and the lens group.

Drawings

FIG. 1 is a schematic structural diagram of a two-dimensional micro light spot array generating device;

the system comprises a power supply module 1, a control module 2, a communication module 3, a control circuit 4, an LED array 5, an optical fiber array 6 and an adapter plate 7, wherein the power supply module, the control module 2, the communication module 3, the control circuit 5, the LED array 6 and the optical fiber array are respectively arranged on the adapter plate;

fig. 2 is a top view of an N x M pixel array structure of the image sensor;

FIG. 3 is a diagram of a pixel exposure apparatus optical path structure;

figure 4 is an array of spots.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example 1:

a two-dimensional tiny light spot array generating device capable of independently exposing pixels of an image sensor comprises a control circuit, an LED, an optical fiber and a two-dimensional hole array structure/adapter plate; the control circuit is provided with a power supply control module, a D/A conversion module, a triode module, a surface mounted LED attached to the back of the PCB and a control switch. The optical fiber is a plastic optical fiber with the outer diameter of 1mm and the inner diameter of 0.75 mm. The two-dimensional hole array structure takes a PCB as a carrier, and precision punching operation is carried out on the two-dimensional hole array structure to obtain the two-dimensional hole array structure.

Further, the LED control circuit can control the luminous intensity of each LED respectively and is provided with a digital communication interface.

Furthermore, each LED is coupled with one optical fiber, the output ends of the optical fibers are respectively inserted into the two-dimensional array micropore adapter plate, the light outlet ends of the optical fibers penetrate through the two-dimensional array micropore adapter plate, and the light outlet surface of each optical fiber and the ground of the adapter plate are on the same plane to form a point light source array.

Further, a point light source array on the adapter plate is imaged through a convex lens to obtain a two-dimensional tiny light spot array.

Example 2:

taking the structural design of a 3-by-3 pixel array as an example, the structure can form a 4-row and 4-column two-dimensional structure light spot array with fine-adjustable mutual distance according to different sensor pixel sizes and distances, the light spot array is shown in fig. 2, a 4-row and 4-column point light source array is formed by adopting 16 optical fibers, and the distance between the optical fibers is 0.2-0.6 mm.

16 optical fibers are respectively coupled with the LEDs, the LEDs and the control circuit are arranged on the other circuit board, the luminous intensity of each LED can be independently controlled, and the structure is fixedly connected with the micro-motion holder to form a light spot light source structure with a fine-adjustable posture.

Through collimation integration, a facula light source structure, an ultra-wide angle lens group and an image sensor are fixed on an optical platform and are sealed in a box body to form a darkroom effect, and the device structure is shown in fig. 1. The focal length of the ultra-wide angle lens can reach 15 mm and even be shorter. Therefore, when the end face of the optical fiber is 0.5m away from the lens, the distance between adjacent light spots on the focal plane is smaller than 12 μm, and the diameter of the light spot on the pixel can be controlled to be about 3 μm. In addition, the adapter frame can realize programmable fine adjustment in three axial directions and two horizontal directions; the light source is controlled by a circuit to emit light, and the light source driving, controlling, communicating and auxiliary circuits are fixedly connected with the adapter rack.

The super wide-angle lens, the image sensor and the auxiliary circuit form an image acquisition platform, and face the emitting surface of the 4 x 4 point light source array, and determine a large enough object distance by referring to the convex lens imaging theorem, so that the image of the optical fiber end surface (or a sub-array formed by a plurality of optical fibers) of the 4 x 4 point light source array on a focal plane is smaller than the size of a single pixel, and each pixel of the 3 x 3 pixel array can have a complete light spot or the image of the light spot sub-array, namely a light spot, so that the independent exposure control of each adjacent pixel is realized. And controlling the micro light spot array structure to automatically align with any 3 x 3 pixel array of the image sensor, so that each light spot of the light spot array is aligned with only one pixel.

By using the device and the alignment method, under the condition of carrying out certain combined exposure on adjacent pixels of a 3-by-3 pixel array, namely under the condition that each pixel in the adjacent pixel array obtains different photon irradiation, crosstalk data are actually measured, the coupling relation of the exposure of the pixel and a plurality of adjacent pixels, including the difference of the exposure and the crosstalk amount, is researched, and the coupling characteristics of the pixel are obtained by establishing the relationship of the crosstalk component, the gray value of the pixel, the gray value difference of the pixel and the exposure amount through analysis, comparison, fitting and the like.

In summary, the following steps: the invention discloses a two-dimensional tiny light spot array generating device capable of independently exposing pixels of an image sensor, and belongs to the technical field of electronic component manufacturing. The LED illumination control system comprises a power supply module, an LED control module, a communication module and other circuits, an LED array and an optical fiber array, and is characterized in that the control circuit can respectively control the luminous intensity of each LED and is provided with a digital communication interface; each LED is coupled with one optical fiber, the output ends of the optical fibers are respectively inserted into the two-dimensional array micropore adapter plate, the light-emitting ends of the optical fibers penetrate through the two-dimensional array micropore adapter plate, and the light-emitting surface of each optical fiber and the ground of the adapter plate are positioned on the same plane to form a point light source array; and the point light source array is imaged through a convex lens to obtain a two-dimensional tiny light spot array. The tiny two-dimensional light spot array can expose controllable quantity of image sensor pixels by controlling the intensity of the LEDs.

Claims

1. A two-dimensional tiny light spot array generating device is characterized by comprising a control circuit, an LED array, an optical fiber array and an adapter plate; the control circuit respectively controls the luminous intensity of each LED and is provided with a digital communication interface; each LED is coupled with one optical fiber, the output ends of the optical fibers are respectively inserted into the two-dimensional array micropore adapter plates, the light-emitting ends of the optical fibers penetrate through the two-dimensional array micropore adapter plates, the light-emitting surface of each optical fiber and the ground of the adapter plates are on the same plane to form a point light source array, and the point light source array is imaged through a convex lens to obtain a two-dimensional tiny light spot array;

the two-dimensional tiny light spot array is fixedly connected with the micro-motion holder to form a light spot light source structure with a fine-adjustable posture; through collimation integration, a facula light source structure, an ultra-wide angle lens group and an image sensor are fixed on an optical platform and are sealed in a box body to form a darkroom effect, so that the adapter realizes programmable fine adjustment in three axial directions and two horizontal directions; the light source is controlled by a circuit to emit light, and a light source driving, controlling, communicating and auxiliary circuit is fixedly connected with the adapter rack;

the super wide-angle lens, the image sensor and the auxiliary circuit form an image acquisition platform, so that each pixel has a complete light spot or an image of a light spot sub-array, namely a light spot, and independent exposure control of each adjacent pixel is realized.

2. The two-dimensional micro light spot array generating device according to claim 1, wherein the control circuit comprises a power module, a control module and a communication module.