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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

Pending Publication Date: 2019-06-11
珠海博明视觉科技有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a built-in coaxial illumination line scan lens to solve the problem that the aberration generated by the existing external coaxial scanning light source affects the detection accuracy

Method used

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  • Built-in coaxial illumination line scanning lens
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  • Built-in coaxial illumination line scanning lens

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, not all the embodiments, based on The embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the protection scope of the present invention.

[0031] See Figure 1 to Figure 11 , A built-in coaxial illumination line scan lens, comprising a first lens group G1, an iris STO, a second lens group G2 and an image plane IMA which are sequentially arranged along the imaging path. The first lens group G1 and the A dichroic prism BS is arranged between the variable diaphragm STO. The light source input end of the light splitting optical path of the dichroic prism BS is provided with an illumin...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/10G02B26/08G02B7/02
Inventor 何贵明姚平赵春艳夏雪婷
Owner 珠海博明视觉科技有限公司
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