A plate of glass marked out into concentric zones or rings alternately transparent and opaque, used like a lens to bring light to a focus.
- ‘Other alternatives include total-external-reflection-based components such as polycapillary optics or diffraction-based Fresnel zone plates.’
- ‘Hudec uses a lensless camera called a zone plate pinhole, which allows her to render life the way she sees it - fleeting, sensual and fragile.’
- ‘Since a zone plate diffracts light, a zone plate image is closely related to a pinhole image.’
We take a look at several popular, though confusing, punctuation marks.