A Large Field of View Distortionless Scaling Objective Lens

Abstract

The invention discloses a large-view field distortionless scaling objective lens, which relates to the field of optical objective lenses, meets precise detection requirements on a large-sized workpiece in industrial detection, and overcomes technical shortcomings of the existing scaling objective lens. The objective lens comprises an objective surface, lenses form the first to the fourth, an aperture, lenses from the fifth to the ninth, and an image surface arranged sequentially along the optical axis; the fifth lens and the sixth lens form a bonding lens; and light emitted by the objective surface sequentially passes the first lens, the second lens, the third lens, the fourth lens, the aperture, the bonding lens, the seventh lens, the eighth lens and the ninth lens to arrive at the image surface for imaging. A small number of glass lenses are adopted, various imaging aberrations are optimized and fully corrected, parameters of a lens with the minimal caliber can be adjusted, requirements of different lighting light sources are met, the objective surface size of the scaling objective lens can reach 750mm, and the full-view field distortion is smaller than 0.012%, and the large-view field distortionless scaling objective lens can be widely applied to large-breadth high-speed and high-precision automatic optical detection equipment.

Description

technical field [0001] The invention relates to the technical field of optical objective lenses, in particular to a large field of view distortion-free scaling objective lens. Background technique [0002] With the development of industrial technology, in biological, genetic, medical, industrial and other detection fields, the requirements for detection accuracy, detection speed, and detection size are constantly increasing, so the requirements for automatic optical inspection (AIO) equipment and zoom objective lenses are also increasing. In particular, it is very difficult to design and manufacture a reduction objective lens that can meet the requirements of large workpieces (larger than 700mm in size), large field of view, and precision detection without distortion. There are no examples of widespread application at present. . [0003] Any automatic optical inspection equipment used for precision inspection requires corresponding optical objective lenses, combined with de...

AI Technical Summary

Problems solved by technology

[0005] In order to meet the demand for precise inspection of large-sized workpieces in industrial inspections and overcome the technical deficiencies of the existing zoom objective lenses, the present invention provides a large field of view distortion-free zoom objective lens, which uses a small number of glass lenses and optimizes the And fully correct various imaging aberrations, the object plane size of the scaled objective lens reaches 750mm, the full field of view distortion is less than 0.012%, the object plane and the image plane are both flat, and can be widely used in large-format, high-speed, high-precision automatic optics Testing equipment, mainly aimed at the scale objective lens of testing equipment for industrial circuit boards, solder paste, and stencils

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