A Double-Telecentric Optical System with Two Optical Paths

An optical system, bi-telecentric technology, applied in optics, optical components, instruments, etc., can solve the problem of inability to obtain SMT package circuit parameters and size information, and achieve outstanding substantive features, high resolution, and high material repetition rate. Effect
CN109541802BActive Publication Date: 2021-03-16UNIV OF SHANGHAI FOR SCI & TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF SHANGHAI FOR SCI & TECH
Publication Date
2021-03-16

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Abstract

The invention discloses a double-optical-path double-telecentric optical system. The optical system comprises a projection system and an imaging system; the imaging system is sequentially provided with a common-optical-path objective lens set, a beam splitter prism, a diaphragm I and an imaging objective lens set from an object surface to an image surface; the projection system comprises a lighting system, a projection objective lens set, a diaphragm II, a beam splitter prism and a common-optical-path objective lens set from a lighting system to the object surface; the projection system projects modulated stripe light generated by the lighting system onto the object surface; and the imaging system is used for imaging stripe light information reflected by the object surface on the image surface. The optical system is high in integration level, high in precision, high in resolution, high in telecentricity and small in distortion, can effectively improve the imaging quality, and can be applied to the field of high-precision detection of optical lenses; and in addition, materials used by the lenses are relatively high in repetition rate, so that the processing is facilitated, and the cost is reduced.
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Description

technical field

[0001] The present invention relates to an optical system, in particular to a high-precision, high-telecentric double-optical path double-telecentric optical system, which is especially suitable for machine vision inspection equipment for PCB board products based on SMT surface mount technology , belonging to the field of optical imaging technology. Background technique

[0002] In large-scale industrial production, online inspection based on machine vision can greatly improve production efficiency and industrial automation level. As an important part of the detection system, the imaging lens has higher and higher design requirements. With the development of SMT packaging technology, the PCB gradually tends to be denser and more refined, and the requirements for the production quality of SMT packaged circuit boards are increased, which makes it particularly important to detect and detect defects in SMT packaged circuit boards in time. The traditional AOI in...

Claims

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