Built-in coaxial illumination line scanning lens

A technology of scanning lens and lighting line, applied in the field of online scanning lens, can solve the problem of aberration affecting detection accuracy, and achieve the effect of ensuring optical resolution and improving measurement accuracy
CN109870802APending Publication Date: 2019-06-11珠海博明视觉科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
珠海博明视觉科技有限公司
Publication Date
2019-06-11

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Abstract

The invention discloses a built-in coaxial illumination line scanning lens. The lens comprises a first lens group G1, a variable diaphragm STO, a second lens group G2 and an image surface IMA which are sequentially arranged along an imaging path; a beam splitter prism BS is arranged between the first lens group G1 and the variable diaphragm STO; and an illumination lens group G3 is arranged at thelight source input end of a beam splitter path of the beam splitter prism BS. A spectroscope is not required to be arranged in front of the lens so as to introduce an external light source, and coaxial illumination light is arranged in the beam path; an aberration of the coaxial illumination light is not amplified through the lens, so that the optical resolution of the lens is guaranteed; and therefore, the measurement precision is improved.
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Description

Technical field

[0001] The invention relates to the field of line scan lenses, in particular to a line scan lens with built-in coaxial illumination. Background technique

[0002] At present, automatic optical inspection (AOI) equipment has been widely used in printing inspection, check scanning, electronic product manufacturing, food sorting, transportation safety and other fields to improve production efficiency and yield, while line scan lenses and line scan light sources are It is the core component of automatic optical inspection equipment. Only when the lighting effect is good and the lens can accurately and clearly obtain the real image of the object under test can the back-end image processing be guaranteed.

[0003] The existing line scan lens usually uses an external coaxial line scan light source. This implementation is to add a 45-degree beam splitter between the measured object surface and the lens. Because the beam splitter is set in front of the lens, the beam splitte...

Claims

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