CN207636826U - High-precision optical lens assembly assembling device - Google Patents

Abstract

In order to solve the problems of high processing difficulty, high risk, repeated rework and difficulty in ensuring accuracy in the centering process of the current optical lens assembly process, the utility model provides a high-precision optical lens assembly assembly device, which includes The adjustment platform, at least three photoelectric distance sensors and at least three telescopic adjustment rods; the center of the adjustment platform is provided with a circular through hole/circular groove, and a vertical lift is arranged in the circular through hole/circular groove. Ring lifting platform; the center of the ring lifting platform is fixed with a vacuum absorber; the ring lifting platform is used to place and adjust the frame to be assembled; the vacuum absorber is used to absorb the lens to be assembled; the photoelectric distance sensor and the telescopic adjustment rod are evenly distributed along the circumference. on the adjustment platform and point to the center of the adjustment platform. On the premise of satisfying the assembly precision, the utility model ensures the coaxiality between the optical axis of the mirror lens and the mechanical center axis of the frame, and does not need to perform centering processing, thus avoiding a series of problems caused by centering processing.

Description

A high-precision optical lens assembly assembly device

technical field

The utility model belongs to the optical field and relates to an optical lens assembly device.

Background technique

In optical equipment, a set of optical lenses is generally composed of multiple single lenses assembled in the lens barrel according to the designed spacing. The lens assembly method is mostly fixed by circular dispensing and pressure ring compression; for the convenience of assembly and adjustment , Generally, a single optical lens is put into a frame to form a lens assembly, and then the lens assembly is loaded into the lens barrel according to the designed spacing.

Since the assembly accuracy of a single optical lens has a direct impact on the overall imaging quality of the optical equipment, in order to ensure the imaging quality of the optical system, after the optical lens is installed in the frame and the glue is dispensed and the pressure ring is pressed, the lens assembly needs to be centered. To ensure the consistency of the optical axis of the optical lens and the mechanical central axis of the frame.

The centering processing of the lens assembly is generally completed on a high-precision centering lathe. The centering processing is processed together with the frame and the optical lens, which brings many risks to the optical lens: First, if there is a human error during the processing, it will directly Cause optical lenses to chip or scratch so that they cannot be used. Second, if the feed amount is not well controlled during processing and the processing amount is out of tolerance, the assembly gap between the frame and the lens barrel will become larger, which cannot meet the optical design requirements. The optical lens can only be removed to reassemble the frame and perform centering processing. It not only increases the workload but also brings secondary risks. Thirdly, after the centering process, the mirror frame will have a stress release process due to the action of the force, and it is difficult to ensure that the final processing accuracy can meet the design requirements. Fourth, in order to meet the requirements of centering processing, it is necessary to design additional process holes and process flanges on the frame, which is cumbersome to design and causes waste of materials.

Therefore, in view of the many problems existing in the centering processing of the current lens assembly during the assembly process, it is urgent to develop a safer and more reliable optical lens assembly method and assembly device.

Utility model content

In order to solve the technical problems existing in the centering process of optical lenses in the assembly process, such as high processing difficulty, high risk, frequent rework and difficulty in ensuring accuracy, the utility model provides a high-precision optical lens assembly device.

The technical scheme of the utility model is:

A high-precision optical lens assembly assembly device, which is special in that it includes an assembly and adjustment platform, at least three photoelectric distance sensors and at least three telescopic adjustment rods;

The center of the adjustment platform is provided with a circular through hole/circular groove, and a ring-shaped lifting platform that can be vertically lifted is arranged in the circular through-hole/circular groove; the center of the ring-shaped lifting platform is fixed with a vacuum Adsorber;

The annular lifting platform is used to place and adjust the frame to be assembled;

The vacuum absorber is used to absorb the lens to be assembled;

The photoelectric distance sensor and telescopic adjustment rods are evenly distributed on the installation and adjustment platform along the circumference, and point to the center of the installation and adjustment platform.

Further, there are three photoelectric distance sensors and telescopic adjustment rods.

Further, the annular lifting platform is concentrically arranged in the circular through hole/circular groove, so as to further improve the accuracy of assembly adjustment.

Compared with the prior art, the utility model has the following advantages:

The utility model adopts a brand-new assembly and adjustment idea, and at the same time cooperates with a high-precision assembly device. Under the premise of meeting the assembly accuracy, it can directly ensure the coaxiality of the optical axis of the lens in the lens assembly and the mechanical central axis of the frame, without further centering processing , avoiding the damage and rework of the optical lens during the centering process in the traditional assembly process, and at the same time greatly improving the assembly efficiency and saving manpower and financial costs.

Description of drawings

Fig. 1 is a schematic diagram of an embodiment of a high-precision optical lens assembly device of the present invention;

Fig. 2 is a schematic diagram of the state change of the high-precision optical lens assembly device shown in Fig. 1 (the state when the ring-shaped lifting platform descends to make the lens lower than the assembly platform);

Fig. 3 is an axial sectional view of the high-precision optical lens assembly device shown in Fig. 1;

Explanation of reference signs: 1-installation and adjustment platform, 2-telescopic adjustment rod, 3-photoelectric distance sensor, 4-frame, 5-lens, 6-lens pressure ring, 11-ring lifting platform, 12-vacuum absorber.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the optical lens assembly device provided by the utility model includes an assembly and adjustment platform, three photoelectric distance sensors and three telescopic adjustment rods which are respectively arranged on the installation and adjustment platform evenly along the circumference; A circular through hole is opened in the center, and a ring-shaped lifting platform capable of vertical lifting is concentrically arranged in the circular through hole, and a cylindrical vacuum adsorber is arranged in the lifting platform. In other embodiments, a circular groove may be formed in the center of the adjustment platform, and the ring-shaped lifting platform is arranged concentrically in the circular groove.

The process of assembling the optical lens using the optical lens assembly device shown in Figure 1 is as follows:

1. Install the three photoelectric distance sensors evenly along the circumference direction on the proper position of the installation and adjustment platform, adjust the direction and position of the photoelectric distance sensors so that they point to the center of the installation and adjustment platform at the same time, and ensure that the three photoelectric distance sensors reach the optical distance sensor. The center positions of the platforms are equal;

2. Place the processed mirror frame to be assembled on the table of the ring-shaped lifting platform, and lower the height of the ring-shaped lifting table so that the upper surface of the mirror frame is lower than the table of the assembly platform, as shown in Figure 2.

3. Place the lens to be assembled on the vacuum absorber in the center of the adjustment platform, adjust the position of the lens so that the values of the three photoelectric distance sensors are consistent, and record the value; then turn on the vacuum absorber, and firmly absorb and fix the lens to be assembled;

4. Raise the height of the circular lifting platform, and adjust the position of the frame in real time, so that the lens can be completely installed in the frame;

5. Install three telescopic adjustment rods evenly distributed on the circumference of the frame, so that the top of the telescopic adjustment rods is in contact with the frame;

6. Adjust the length of the three telescopic adjustment rods in a coordinated manner, and check the values of the three photoelectric distance sensors in real time. When the values of the three photoelectric sensors are consistent, it means that the optical axis of the lens is coaxial with the mechanical axis of the frame, and the adjustment is completed.

7. Install the lens pressing ring, inject glue around the pressing ring, and complete the assembly of the lens assembly after the glue is dry.

Claims (3)

1. A high-precision optical lens assembly assembly device, characterized in that: it includes an assembly platform, at least three photoelectric distance sensors and at least three telescopic adjustment rods; The center of the adjustment platform is provided with a circular through hole/circular groove, and a ring-shaped lifting platform that can be vertically lifted is arranged in the circular through-hole/circular groove; the center of the ring-shaped lifting platform is fixed with a vacuum Adsorber; The annular lifting platform is used to place and adjust the frame to be assembled; The vacuum absorber is used to absorb the lens to be assembled; The photoelectric distance sensor and telescopic adjustment rods are evenly distributed on the installation and adjustment platform along the circumference, and point to the center of the installation and adjustment platform. 2. The high-precision optical lens assembly assembly device according to claim 1, characterized in that there are three photoelectric distance sensors and telescopic adjustment rods. 3. The high-precision optical lens assembly assembly device according to claim 1 or 2, characterized in that: the annular lifting platform is concentrically arranged in the circular through hole/circular groove.