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Photoelectric sensor with adjustable spot size and fixed-focus position and adjustment method

A photoelectric sensor and spot size technology, applied in the field of photoelectric sensing, can solve problems such as efficiency discounts and limitations, and achieve the effect of expanding the boundary of capabilities

Active Publication Date: 2019-12-27
SHANGHAI LANBAO SENSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The redesigned solution needs to be delivered to the user for verification before being put into mass production, and the overall efficiency is also greatly reduced
[0008] A small number of sensors will add transparent media with different thicknesses in the optical path, but since the thickness of the media is fixed, the effect of changing the spot size by changing the thickness of the media is also limited, and the user can only choose among the existing several effects. trade-offs

Method used

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  • Photoelectric sensor with adjustable spot size and fixed-focus position and adjustment method
  • Photoelectric sensor with adjustable spot size and fixed-focus position and adjustment method
  • Photoelectric sensor with adjustable spot size and fixed-focus position and adjustment method

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Embodiment 1: as figure 1 and figure 2 As shown, a photoelectric sensor light source part with adjustable spot size and fixed focus position proposed by the present invention includes a light source 1 and a condenser lens 4, and a flat panel adjustment compensation module 2 is fixedly installed between the light source 1 and the condenser lens 4. It also includes a plate thickness adjustment shaft 5 that can be rotated relative to the light source 1 and the condenser lens 4. The rotational axis of the plate thickness adjustment shaft 5 is parallel to the straight line where the light source 1 and the condenser lens 4 are located, and the plate thickness adjustment shaft 5 is fixedly connected with Flat panel adjustment module 3. The light generated by the light source 1 passes through the panel adjustment module 3 and the panel adjustment compensation module 2 in turn and then enters the condenser lens 4, and the end face of the panel adjustment module 3 and the panel...

Embodiment 2

[0048] Embodiment 2, an image distance adjustment method of an adjustable photoelectric sensor: as image 3 As shown, by introducing a transparent medium into the optical path to change the position of the light source 1 relative to the focusing lens, a transparent medium is provided between the light source 1 and the lens.

[0049] Assuming the thickness and refractive index of the parallel light-transmitting plate to be n, the offset of the equivalent light source can be obtained: a beam of light from light source 1, with an incident angle of a, is emitted from light source 1, and enters a parallel plane with a refractive index of n from the air. The light-transmitting plate, the refraction angle is i, then there is

[0050] sina=nsini

[0051]

[0052] After propagating for a certain distance in the parallel light-transmitting plate, and emitting into the air, there is

[0053] S=L / sini

[0054] =L·sina / n

[0055] Among them, S is the propagation distance in the parall...

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Abstract

The invention discloses a photoelectric sensor with an adjustable spot size and fixed-focus position and an adjustment method. According to key points of the technical scheme, the photoelectric sensorwith the adjustable spot size and fixed-focus position comprises a light source, a condensing lens, a flat panel adjustment compensation module, a flat panel thickness adjustment shaft and a flat panel adjustment module, wherein the light source and the condensing lens are fixedly arranged, the flat panel adjustment compensation module is fixed between the light source and the condensing lens, and the flat panel adjustment module is fixedly connected to the flat panel thickness adjustment shaft; end faces, away from each other, of the flat panel adjustment module and the flat panel adjustmentcompensation module are parallel and perpendicular to a straight line where the light source and the condensing lens are located; end faces, facing each other, of the flat panel adjustment module andthe flat panel adjustment compensation module are parallel to each other and arranged spirally; and the number of spiral turns on the end face, facing the flat panel adjustment compensation module, of the flat panel adjustment module is smaller than or equal to one. According to the photoelectric sensor, the thickness of a light transmission medium can be adjusted at will, the imaging position can be adjusted to an arbitrary position, and the spot size and the fixed-focus position can be adjusted.

Description

technical field [0001] The invention relates to the field of photoelectric sensing, in particular to a photoelectric sensor with adjustable spot size and fixed focus position and an adjustment method. Background technique [0002] Nowadays, with the gradual implementation of industrial automation, sensors as automated sensors have also been widely used. Due to the diversification of user needs, sensors also need to be continuously innovated to meet different application scenarios. [0003] In industrial automation, there is a type of detection that requires a small spot size for non-contact detection, such as detecting the presence or absence of an object through a small-sized aperture, and the size of the object to be detected is small. For this application, it is necessary to use a suitable photoelectric sensor. [0004] The spot size of existing photoelectric sensors is mostly fixed. When encountering detection targets of different sizes, the existing solution is genera...

Claims

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Application Information

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IPC IPC(8): G01D5/34G02B27/09
CPCG01D5/34G02B27/0955
Inventor 许永童许用疆谢勇祁伟光马路明
Owner SHANGHAI LANBAO SENSING TECH