Coaxial Light

2019/04/24
Coaxial Lights (On-Axis)
Coaxial Lights (On-Axis)

The co-axial light transmits light from the side onto a half way mirror. The mirror reflects the light onto the target. Specular reflected light is allowed to pass back up to the camera whereas as diffuse reflected light from the target is rejected. This in turn causes a contrast at the edge points of a target. In addition, the further the light is from the target the greater the rejection of diffused light becomes, creating greater image contrast and definition.

Coaxial light illumination techniques
Coaxial light illumination techniques

A few examples of application of co-axial lights:

The recessed areas diffuse light so they appear dark and the edges can be easily identified.
The recessed areas diffuse light so they appear dark and the edges can be easily identified.
Edges are not clear as diffuse and specular light is received by the camera.
Edges are not clear as diffuse and specular light is received by the camera.
The change from curved to flat is clearly identified and the flat area is highlighted well to the camera.
The change from curved to flat is clearly identified and the flat area is highlighted well to the camera.
Various light components are reflected at all angles causing inconsistent images from part to part.
Various light components are reflected at all angles causing inconsistent images from part to part.
The edges of the marking are clearly defined.
The edges of the marking are clearly defined.
Marking is unclear.
Marking is unclear.
Uniform illumination is possible
Uniform illumination is possible
Specular reflection causes lights to appear on the glass surface
Specular reflection causes lights to appear on the glass surface

Keyence

دیدگاه بگذارید

avatar
  اشتراک  
اطلاع از