CN111103669A

CN111103669A - Assembly device and method for miniature imaging objective lens hemispherical lens

Info

Publication number: CN111103669A
Application number: CN201911361572.1A
Authority: CN
Inventors: 张利娜; 党雅洁; 赵昭; 王志政; 靳建新
Original assignee: Jiaozuo Tianyu Precision Optics Co ltd
Current assignee: Jiaozuo Tianyu Precision Optics Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-05-05

Abstract

The invention provides an assembling device and method of a miniature imaging objective lens hemisphere objective lens, the diameter of the lens in a miniature optical system is less than or equal to phi 2mm, and because the hemisphere lens has no cylinder edge as a fixed surface, the lens can roll, tilt and the like when being installed in a lens barrel, so that the assembling precision and the assembling efficiency are influenced. The device designed by the invention places the sheet of the hemispherical lens at the top of the device, and reversely buckles the objective lens barrel on the lens at the top end of the device, so that the hemispherical lens is directly assembled in place.

Description

Assembly device and method for miniature imaging objective lens hemispherical lens

Technical Field

The invention belongs to the technical field of assembling and processing of micro optical imaging systems, and relates to the application field of micro transmission optical imaging such as a microscope objective, an endoscope and the like.

Background

With the ever-increasing market demand for miniature optical imaging products such as miniature video cameras, medical endoscopes, miniature microscopes, and the like. Increasingly higher demands are made on the miniaturity and high definition of miniature optical imaging systems. Meanwhile, in the design of a microminiature imaging optical system, the optical design with small R value of a lens is often adopted, and in the imaging optical system, the diameter is often less than or equal to

A hemispherical lens of 2mm, which puts higher technical demands on the assembly and manufacturing technology of such optical imaging systems.

Disclosure of Invention

The device and the method aim at solving the problems that in a miniature imaging optical system, a hemispherical lens with the diameter less than or equal to phi 2mm rolls and is not assembled in place in an inclined mode in the lens assembling process, and the contradiction that a workpiece clamping tool of the miniature hemispherical lens and a lens barrel are small in space.

In order to achieve the purpose, the invention provides the following technical scheme: the assembling device of the hemispherical lens comprises a base mandril, a sliding sleeve and a spring for positioning and controlling the sliding state, wherein the sliding sleeve can freely slide under the control of the positioning spring. The length of the spring determines that the sliding sleeve is higher than the ejector rod according to the depth of the lens barrel hole, and the positioning effect is achieved. The assembling method is that the spherical surface of the hemispherical lens is placed on the hole seat of the sliding sleeve, the lens cone is reversely buckled on the hemispherical lens, the sliding sleeve is slightly pressed down through the matching of the base ejector rod, the sliding sleeve and the spring, and the ejector rod pushes the lens to push the lens into the bottom of the lens cone. The device and the method avoid the rolling of the miniature hemispherical lens in the lens cone and also solve the contradiction that the miniature hemispherical clamping tool and the lens cone have small sizes and cannot realize clamping and assembling.

Drawings

FIG. 1 is a schematic structural diagram of an assembling apparatus and method for a hemispherical lens of a micro imaging objective lens according to the present invention;

FIG. 2 is a schematic view of the result of assembling the hemispherical lens according to the present invention;

FIG. 3 is a schematic view of a hemispherical lens structure according to the present invention;

FIG. 4 is a schematic structural view of the lens barrel of the present invention;

FIG. 5 is a schematic structural view of the base rod of the present invention;

FIG. 6 is a schematic view of the spring of the present invention;

fig. 7 is a schematic structural view of the sliding sleeve of the present invention.

Description of reference numerals: 1. a hemispherical lens; 2. a lens barrel; 3. a base ejector rod; 4. a spring; 5. a sliding sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figure 1, the assembling device of the miniature imaging objective lens hemispherical lens comprises a base ejector rod (3), a spring (4) and a sliding sleeve (5), and the assembling method comprises the placing mode of the lens (1) and a lens barrel (2). The spring (4) is arranged on the base ejector rod (3), and the sliding sleeve (5) is arranged on the base ejector rod (3), so that the assembling device of the hemispherical lens of the miniature imaging objective lens is formed. The spring (4) is used for positioning the sliding sleeve and controlling the sliding sleeve to slide up and down. The length of the spring determines the position of the sliding sleeve higher than the ejector rod according to the depth of the hole of the lens cone (2), and finally determines the up-and-down displacement of the sliding sleeve.

The objective lens barrel (2) is reversely buckled at the top of the sleeve on which the lens is placed. The sliding sleeve (5) is lightly pressed by hand, so that the base ejector rod (3) pushes the hemispherical lens (1) into the hole at the front end of the objective lens barrel (2), and the plane of the hemispherical lens is superposed with the plane of the bottom of the lens barrel, as shown in fig. 2. This process requires the barrel to be fixed by hand or otherwise. And finally, the assembling device, the hemispherical lens (1) and the lens barrel (2) are overturned and taken down together, and the assembly of the hemispherical lens of the whole miniature imaging objective lens is completed by fixing with glue.

Claims

1. The device adopts the sliding fit between the base ejector rod (3) and the sliding sleeve (4) and the base ejector rod, the spring (4) plays the role of positioning and sliding control, and the top of the sliding sleeve (5) is slightly higher than the top of the base ejector rod (3) in positioning.

2. The outer diameter of the sliding sleeve (4) is in sliding fit with the inner diameter of the objective lens barrel (2), and the outer diameter of the sleeve and the inner diameter of the lens barrel are required to be concentric within a certain tolerance range.

3. The hole seat at the top of the sliding sleeve (5) is used for placing the hemispherical lens (1), and the spherical surface of the hemispherical lens is placed on the hole seat of the sliding sleeve (5).

4. The objective lens barrel (2) is reversely buckled at the top of the sleeve on which the lens is placed, the sliding sleeve (5) is lightly pressed by hands, so that the base ejector rod (3) pushes the hemispherical lens (1) into the hole at the front end of the objective lens barrel (2), and the plane of the hemispherical lens is superposed with the plane of the bottom of the lens barrel, as shown in figure 2.

5. The device and the method are not limited to be used for hemispherical lenses, and are also suitable for assembling lenses of other spherical lenses in an optical imaging system with the diameter less than or equal to phi 2 mm.