Abstract: The invention relates to a light injector element (20) comprising a body (21) extending according to a longitudinal axis (22), and a light source (23) placed facing an end (25) of the body (21), the light source (23) comprising a plurality of vertical-cavity surface-emitting laser (VCSEL) diodes, said plurality of diodes being arranged so as to form an emission surface (26) substantially perpendicular to the longitudinal axis (22) of the body (21). The invention also relates to a photobioreactor (10) comprising such a light injector element (20).

Abstract: The invention relates to a light injector element (20) comprising a hollow body (21) extending according to a longitudinal axis (22), and a light source (23) placed facing an end (25) of the body (21), the light source (23) being configured to emit a light beam substantially parallel to the longitudinal axis (22) of said body (21), the injector element (20) further comprising at least one optical element (35i) arranged inside the body (21) and configured to let through a fraction of the light beam propagating in a central part (36i) of the body (21), and deflect towards the outside of said body (21) a fraction of the light beam propagating in a peripheral part (37i) of the body so as to locally distribute energy emitted by the light source (23). The invention also relates to a photobioreactor (10) and a domestic lighting element comprising such a light injector element (20).

Abstract: The present invention relates to a photobioreactor intended for the notably continuous culture of photosynthetic microorganisms, preferably microalgae, comprising at least one culture enclosure (1) intended to contain the microorganism culture medium (3) and at least one light source (2) outside the culture enclosure (1), characterized in that it further comprises at least one cylindrical or prismatic light diffusion element (4) placed inside the culture enclosure (1), the light diffusion element (4) being coupled optically with the light source (2) so as to collect the photons emitted by the light source (2) and to return them to the culture medium (3) by its lateral surface. The present invention also relates to the use of a photobioreactor to cultivate photosynthetic microorganisms and to the use of a light diffusion element (4) to illuminate the culture medium of a photobioreactor.

Abstract: The present invention relates to a photobioreactor intended for the notably continuous culture of photosynthetic microorganisms, preferably microalgae, comprising at least one culture enclosure (1) intended to contain the microorganism culture medium (3) and at least one light source (2) outside the culture enclosure (1), characterized in that it further comprises at least one cylindrical or prismatic light diffusion element (4) placed inside the culture enclosure (1), the light diffusion element (4) being coupled optically with the light source (2) so as to collect the photons emitted by the light source (2) and to return them to the culture medium (3) by its lateral surface. The present invention also relates to the use of a photobioreactor to cultivate photosynthetic microorganisms and to the use of a light diffusion element (4) to illuminate the culture medium of a photobioreactor.