On the importance of environment to machine vision systems

Environmental factors for machine vision systems include object reflection coefficient, light, temperature, vibration and pollutants. The editor of TEO will give you a detailed introduction below.

1. Object reflection coefficient

   Reflections from objects can cause highlights and can also blur features. Baffles in lens housings and lens hoods can reduce highlights caused by light dispersion. The baffle is an opaque disc specially designed for the central aperture of the lens to limit the light reaching the sensor. Polarized or diffused light sources can also avoid hot spots caused by reflections from objects.

2. Light

   Light, especially monochromatic light, can increase the contrast of objects and maximize the quality of the lens image. Contrast is very important when using a black and white camera and can be created through a process of addition and subtraction. In the additive process, a monochromatic light source and camera lens filter are matched to the color of the medium in which the object is being analyzed. The area around the object reflects and transmits light, so it appears brighter than the object. This technology is valuable in applications where gels and colored liquids are used as backlit touch screens or for particle detection.

3. Temperature

   In high-temperature environments, problems may occur due to thermal expansion of the optical elements in the lens. Not all lenses can adapt to temperature changes. When detecting hot objects, it is best to use a lens with a longer working distance.

4. Vibration

   Another factor to consider is vibration. It is often necessary to mount the lens on a platform or table separate from the camera to reduce vibration. Heavy camera lenses always come with a clamp. If the lens cannot be mounted directly on a chopping board or similar isolation table, then place the object holding the lens on a separate platform. Robotic arms fixed on independent platforms are often used to load cameras and lenses.

5. Pollutants

   Contaminants under industrial replacement parts can corrode the surface of the lens. Extreme Environment Optics (HEO) products are specifically designed to deliver high-quality images even after long-term exposure to harsh environments. Because its optics are tightly sealed, HEO products can be used underwater and are resistant to corrosion, dust, and mechanical influences.

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