초록 ▼

A luminaire, for example a luminaire for emergency lighting, comprises a light source and an optical element mounted behind the light source, the element being shaped as a fresnel type element so that substantially all the light impinging upon it from the light source is redirected at a specific ang

A luminaire, for example a luminaire for emergency lighting, comprises a light source and an optical element mounted behind the light source, the element being shaped as a fresnel type element so that substantially all the light impinging upon it from the light source is redirected at a specific angle, typically 60°. The element increases the light output over a specific area.

대표청구항 ▼

A luminaire comprising: a light source; and a light redirecting element disposed behind the light source to cause light impinging upon the redirecting element from the light source to be redirected back past the light source at a chosen angle, the redirecting element being a Fresnel type lens having

A luminaire comprising: a light source; and a light redirecting element disposed behind the light source to cause light impinging upon the redirecting element from the light source to be redirected back past the light source at a chosen angle, the redirecting element being a Fresnel type lens having a first plurality of inclined faces at a lens surface nearest the light source and a second plurality of inclined faces at a lens surface furthest from the light source.