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Scientific Computing & Data Science

[Machine Vision] Camera & Illumination 본문

Machine Vision

[Machine Vision] Camera & Illumination

cinema4dr12 2017. 12. 15. 16:04

Machine Vision Camera & Illumination

 

Types of Light Sources

  • Incandescent Lamps: 3000 ~ 3400K

  • Xenon Lamps: 5500 ~ 12000K

  • Fluorescent Lamps: 3000 ~ 6000K

  • LED: Primary choice of illumination, inexpensive, long-term, flash light, different colors

Using Polarity of Light

Using polarized light and having an additional analyzer (polarization filter) in front of camera can reduce specular reflections

Directional Properties

  • Diffuse Light: Light in all directions

  • Directed Light: Light in a narrow beam

  • Telecentric Light: Beam of only parallel rays

  • Front Light: Illumination on same side as camera

  • Back Light: Illumination on opposite side of camera

  • Bright Field: Most of the light is reflected into camera

  • Dark Field: Most of the light is away from camera


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