An optical distortion that occurs because a lens has a different refractive index for different wavelengths of light, causing them to focus at slightly different distances. This results in visible color fringes, typically purple, red, or green, along high-contrast edges in a projected image. High-quality luminaires use achromatic doublets to correct this.
Heard on the job
You can see severe chromatic aberration on the edges of the gobo projection, with blue bleeding out on one side and red on the other.
Also heard as
- Color fringing