Physics

Dot image and dot object


It's called object pointfor an optical system, the vertex of the beam of light falling on an object or surface and divided into three main types:

  • Real Object Point (POR): is the vertex of a divergent beam of light, being formed by the effective crossing of the light rays.
  • Virtual Object Point (POV): It is the vertex of a converging beam of light, being formed by the imaginary crossing of the length of the rays of light.
  • Inappropriate Object Point (POI): It is the vertex of a cylindrical beam of light, that is, it lies at infinity.

It's called dot picturefor an optical system, the vertex of an emerging beam of light, that is to say after being incident.

  • Real Image Point (PIR): It is the vertex of a convergent emerging light beam, formed by the effective crossing of the light rays.
  • Virtual Image Point (PIV): It is the vertex of a divergent emerging beam of light, being formed by the imaginary crossing of the extension of light rays.
  • Inappropriate image point (PII): It is the vertex of a cylindrical emerging beam of light, that is, it lies at infinity.