Where are totally reflecting prisms used?

 title: 'Technical diagram of a mechanical component.'

Fresnel used totally reflecting prisms to construct optical agents[1]. These prisms are used in optical combinations like catadioptric fixed lights[1]. They are also employed in lighthouse illumination[1].

Totally reflecting prisms are also applicable to a revolving light where there is a central burner[1]. The prisms can be generated round either a vertical or horizontal axis, or may be made straight[1].