CN-224202711-U - Device for checking eccentricity of positive focal length lens

Abstract

The utility model relates to the technical field of checking the eccentricity of lenses, in particular to a device for checking the eccentricity of a positive focal length lens, which comprises a supporting seat and a receiving seat, wherein a laser emitter for irradiating the right center of the lens is fixed on the supporting seat, a receiving sensor is fixed on the receiving seat, and parallel light beams emitted by the laser emitter are aligned with the receiving sensor. The utility model has simple structure and convenient operation, can rapidly and accurately detect whether the eccentricity of the positive focal length lens is qualified or not through the cooperation of the laser emitter and the receiving sensor, ensures that the eccentricity of the positive focal length lens for production and shipment is in a qualified range, reduces the outflow risk of defective products, and effectively realizes batch inspection of the eccentricity of the positive focal length lens.

Inventors

• ZHANG JIAWEN
• You huajian
• WANG CHANGLING

Assignees

• 福建富兰光学股份有限公司

Dates

Publication Date

20260505

Application Date

20250512

Claims (7)

1. 1. The device for checking the eccentricity of the positive focal length lens is characterized by comprising a receiving seat and a supporting seat for placing the lens, wherein a laser emitter for irradiating the right center of the lens is fixed on the supporting seat, a receiving sensor is fixed on the receiving seat, and parallel light beams emitted by the laser emitter are aligned with the receiving sensor.
2. 2. The device for detecting the eccentricity of a positive focal length lens of claim 1, wherein the support base is provided with an arc-shaped limiting convex part, and the arc-shaped limiting convex part is provided with an arc-shaped groove.
3. 3. The device for detecting the eccentricity of a positive focal length lens of claim 1, wherein the contact surface between the arc-shaped limiting convex part and the lens is stuck with a piece of velvet cloth.
4. 4. The device for detecting the eccentricity of a positive focal length lens of claim 1, wherein the receiving base is provided with a receiving hole, and the receiving sensor is positioned on one side of the receiving hole away from the supporting base.
5. 5. The apparatus of claim 1, wherein the receptacle is a receptacle of S136 steel.
6. 6. The apparatus of claim 1, wherein the receptacle has a receiving plate, the receiving sensor is fixed to the receiving plate, and a surface of the receiving plate facing the laser emitter has a polycarbonate layer.
7. 7. The apparatus for detecting eccentricity of a positive-focal-length lens according to claim 6, wherein the thickness of the polycarbonate layer is 3 mm.+ -. 0.05mm.

Description

Device for checking eccentricity of positive focal length lens Technical Field The utility model relates to the technical field of lens eccentricity inspection, in particular to a device for inspecting positive focal length lens eccentricity. Background In the lens production process, eccentricity is one of the key indexes for measuring the quality of the lens. The influence of decentration of the positive focal length lens is mainly shown in the following two aspects of 1. Influence on imaging quality is that (1) aberration is generated, and coma, astigmatism, distortion and the like are generated in an optical system due to decentration. (2) The definition is reduced, namely, light rays cannot be focused according to an ideal path, so that the definition and contrast of imaging are reduced, an image becomes blurred, and details are difficult to distinguish. (3) The color reproduction is affected by making the difference of the focusing positions of the light rays with different wavelengths larger, and the color difference is aggravated, so that the imaging color is distorted. 2. The influence on the performance of an optical system is that (1) the accuracy of an optical path is affected, namely, in a precise optical system such as laser processing, astronomical observation and medical imaging equipment, the optical path is deviated from a designed path due to the eccentric lens, so that the system cannot achieve the expected accuracy and performance. (2) The system resolution is reduced, the capability of the optical system for distinguishing fine structures and objects is limited, and for applications requiring high resolution, such as microscopes, aerial photography and the like, the poor eccentricity control can lead to the system failing to meet the use requirements. 3. Affecting system stability, leading to instability in optical performance, and potentially large fluctuations in imaging quality and system performance under different operating conditions and environments. The detection method for the positive focal length eccentricity is required to rely on complex and expensive equipment, is complex to operate, has low efficiency and limited precision, is difficult to meet the requirement of mass production, and cannot realize the hundred percent inspection of the produced positive focal length lens. Meanwhile, the high inspection equipment cost limits the use and popularization of many small and medium enterprises, so that the lens eccentricity inspection is abandoned. Therefore, there is an urgent need for a simple, efficient, and highly accurate lens eccentricity detection device to improve product quality. Disclosure of utility model The utility model aims to provide a device for checking eccentricity of a positive focal length lens. The utility model provides the following technical scheme: the utility model provides a device for checking eccentricity of a positive focal length lens, which comprises a receiving seat and a supporting seat for placing the lens, wherein a laser emitter for irradiating the right center of the lens is fixed on the supporting seat, a receiving sensor is fixed on the receiving seat, and parallel light beams emitted by the laser emitter are aligned with the receiving sensor. Further, the supporting seat is provided with an arc-shaped limit convex part, and an arc-shaped groove is formed in the arc-shaped limit convex part. Further, the contact surface of the arc-shaped limiting convex part and the lens is stuck with a piece of golden velvet. Further, a receiving hole is formed in the receiving seat, and the receiving inductor is located at one side, far away from the supporting seat, of the receiving hole. Further, the receiving seat is made of S136 steel. Further, the receiving seat is provided with a receiving plate, the receiving sensor is fixed on the receiving plate, and the surface of the receiving plate facing the laser emitter is provided with a polycarbonate layer. Further, the thickness of the polycarbonate layer is 3 mm.+ -. 0.05mm. Compared with the prior art, the utility model has the advantages that the structure is simple, the operation is convenient, the eccentricity of the positive focal length lens is detected rapidly and accurately by the cooperation of the laser emitter and the receiving sensor, the eccentricity of the positive focal length lens in production and shipment is ensured to be in a qualified range, the outflow risk of defective products is reduced, and the batch inspection of the eccentricity of the positive focal length lens is effectively realized; compared with other conventional inspection equipment, the utility model has low price, can be built and used by small and medium enterprises, reduces the time of inspection, and can finish inspection by average inspection in a single product 10S. Drawings FIG. 1 is a schematic cross-sectional view of the present utility model in practical use. Fig. 2 is a schematic view of the structure of