Welding Inspection

为降低外部环境光对焊缝结构光图像的干扰，需要在镜头前安装一个滤光片。
滤光片的主要功能是有目的性的只允许特定波长的激光透过，尽可能的将其余波
长的光线吸收掉

本文使用的激光发射器的波长为 650nm，所以选择 650nm 通道
的滤光片，保证结构光可以完全透过成像在相机中。

 

Blue laser not affected by hot targets

a. Reflected blue laser light

b. Radiant light from hot targets
(including many wavelength components between red and infrared)

c. Band-pass filter passing light of around 405 nm only
(preventing the influence of the wavelength components between red and infrared)

12 products

  • Setup Reference

    Keyence:
    LJ-X8000 Profiler
    405nm Lightsource + 405nm Bandpass Filter
    https://www.keyence.com/ss/products/measure/welding/inspection/surface.jsp
    https://www.keyence.com/products/measure/laser-2d/lj-x8000/specs/

  • Selecting Filters

    1. Center Wavelength
    The center wavelength should be close the wavelength that your profiler emit.
    (The profiler will usually have a diode laser built in, you can check manufacturer datasheet for reference)

    2. FWHM
    The FWHM can be anything from 10nm to 40nm. Usually 10nm will be sufficient for most of the condition.

Message us