CN112305702A

CN112305702A - Convenient multifocal light path system

Info

Publication number: CN112305702A
Application number: CN202011350072.0A
Authority: CN
Inventors: 杨健君; 魏进业; 金名亮; 水玲玲; 潘新建; 易子川; 迟锋; 张智; 刘黎明; 吴洁滢
Original assignee: South China Normal University; University of Electronic Science and Technology of China Zhongshan Institute
Current assignee: South China Normal University; University of Electronic Science and Technology of China Zhongshan Institute
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-02-02

Abstract

The invention discloses a convenient multifocal light path system, which comprises three convex lenses which are parallel to each other and are sequentially arranged from left to right, wherein the three convex lenses are a left convex lens, a middle convex lens and a right convex lens respectively, the center of the left convex lens is not provided with a hole, the centers of the middle convex lens and the right convex lens are both provided with holes, the aperture K1 at the center of the middle convex lens is equal to the radius R1 of the left convex lens, the aperture K2 at the center of the right convex lens is equal to the radius R2 of the middle convex lens, the radius of the right convex lens is R3, and R1 is more than R2 than R3.

Description

Convenient multifocal light path system

Technical Field

The present invention relates to a multi-focus optical path system, and more particularly, to a convenient multi-focus optical path system.

Background

In order to realize high precision and high performance, the conventional multi-focus optical path system has many parts, complex structure and inconvenient use.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a convenient multi-focus optical path system with a simple structure.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a convenient multifocal optical path system comprises three convex lenses which are parallel to each other and are sequentially arranged from left to right, wherein the three convex lenses are a left convex lens, a middle convex lens and a right convex lens respectively, the center of the left convex lens is not provided with a hole, the center of the middle convex lens and the center of the right convex lens are both provided with holes, the aperture K1 at the center of the middle convex lens is equal to the radius R1 of the left convex lens, the aperture K2 at the center of the right convex lens is equal to the radius R2 of the middle convex lens, the radius of the right convex lens is R3, and R1 < R2 < R3.

The parallel light beam can be divided into three parts for focusing, when the radius R of the light beam is less than R1, the part of the light beam is focused by the left convex lens to pass through the holes at the centers of the middle convex lens and the right convex lens to form a focus S1; when the beam radius R is greater than R1 but less than R2, the portion of the beam is focused by the middle convex lens through the hole in the center of the right convex lens forming a focal point S2; when the beam radius R is larger than R2, the portion of the beam is focused by the right convex lens to form a focal point S3.

Each focal point is formed by focusing one convex lens individually, the focal length of the left convex lens is F1, the focal length of the middle convex lens is F2, the focal length of the right convex lens is F3, the distance between the center a of the left convex lens and the focal length F3 is L3, the distance between the center a of the middle convex lens and the focal length F2 is L2, the distance between the center a of the third convex lens and the focal length F1 is L1, L1 is F3, L2 is F2, and L3 is F1.

The invention has the beneficial effects that: the invention can not only meet the general performance requirements, but also has simple structure and convenient carrying.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural view of the present invention.

Detailed Description

Referring to fig. 1, a convenient multifocal optical path system includes three convex lenses (a left convex lens 1, a middle convex lens 2 and a right convex lens 3 from left to right) which are parallel to each other and are arranged in sequence from left to right, the three convex lenses are the left convex lens 1, the middle convex lens 2 and the right convex lens 3 respectively, the center of the left convex lens 1 is not provided with a hole, the center of the middle convex lens 2 and the center of the right convex lens 3 are both provided with holes, an aperture K1 at the center of the middle convex lens 2 is equal to a radius R1 of the left convex lens 1, an aperture K2 at the center of the right convex lens 3 is equal to a radius R2 of the middle convex lens 2, a radius of the right convex lens 3 is R3, and R1 < R2 < R3.

The parallel light beam can be divided into three parts for focusing, when the radius R of the light beam is less than R1, the light beam is focused by the left convex lens 1 to pass through the hole at the center of the middle convex lens 2 and the right convex lens 3 to form a focus S1; when the beam radius R is larger than R1 but smaller than R2, the portion of the beam is focused by the intermediate convex lens 2 through the hole in the center of the right convex lens 3 to form a focal point S2; when the beam radius R is larger than R2, this part of the beam is focused by the right convex lens 3 to form a focal point S3.

The optical centers of the three convex lenses are connected into a straight line, and the distance between the parallel light beams and the straight line is the radius r of the light beams.

Each focal point is formed by focusing one convex lens individually, the focal length of the left convex lens 1 is F1 (i.e. the distance between the optical center of the left convex lens and the focal point S3), the focal length of the middle convex lens 2 is F2 (i.e. the distance between the optical center of the middle convex lens and the focal point S2), the focal length of the right convex lens 3 is F3 (i.e. the distance between the optical center of the right convex lens and the focal point S1), the distance between the center a of the left convex lens 1 and the focal length F3 is L3, the distance between the center a of the middle convex lens 2 and the focal length F2 is L2, the distance between the center a of the third convex lens and the focal length F1 is L1, and L1 ═ F3, L2 ═ F2, and L3 ═ F1.

The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.

Claims

1. The convenient multifocal optical path system is characterized by comprising three convex lenses which are parallel to each other and are sequentially arranged from left to right, wherein the three convex lenses are a left convex lens (1), a middle convex lens (2) and a right convex lens (3), the center of the left convex lens (1) is not provided with a hole, the centers of the middle convex lens (2) and the right convex lens (3) are both provided with holes, the aperture K1 at the center of the middle convex lens (2) is equal to the radius R1 of the left convex lens (1), the aperture K2 at the center of the right convex lens (3) is equal to the radius R2 of the middle convex lens (2), the radius of the right convex lens (3) is R3, and R1 < R2 < R3.

2. Convenient multifocal optical path system according to claim 1, characterized in that the parallel light beam is focused in three portions, which are focused by the left convex lens (1) through the aperture in the center of the intermediate convex lens (2) and the right convex lens (3) forming the focus S1 when the beam radius R < R1; when the beam radius R is larger than R1 but smaller than R2, the portion of the beam is focused by the middle convex lens (2) through the hole in the center of the right convex lens (3) to form a focal point S2; when the beam radius R is larger than R2, the part of the beam is focused by the right convex lens (3) to form a focus S3.

3. Convenient multifocal optical path system according to claim 2, characterized in that each focus is formed by a single convex lens focused individually, the focal length of the left convex lens (1) is F1, the focal length of the middle convex lens (2) is F2, the focal length of the right convex lens (3) is F3, the distance between the center a of the left convex lens (1) and the focal length F3 is L3, the distance between the center a of the middle convex lens (2) and the focal length F2 is L2, the distance between the center a of the third convex lens and the focal length F1 is L1, and L1= F3, L2= F2, L3= F1.