Phototherapy Handpiece

A light delivery apparatus for use in phototherapy comprising:

• a handpiece;
• and
• a beamshaping element housed in the handpiece;
• wherein the beamshaping element is adapted to
• receive a beam of light from an ultraviolet light source,
• modify the shape of the beam, whereby the beam has a cross-section with an irregularly shaped, tilable boundary comprising three or more sinusoid-like edges, and
• direct the modified beam to provide illumination of a region of a treatment surface.

A light delivery apparatus for use in phototherapy, comprising:

• a handpiece comprising a beamshaping element, said beamshaping element adapted to receive a beam of light from an ultraviolet light source, modify the shape of the beam, whereby the beam has a cross-section with an irregularly shaped, tilable boundary comprising three or more sinusoid-like edges;
• and direct the modified beam to provide illumination of a region of a treatment surface;
• and
• a plurality of screens adapted to be interchangeably received by the beam shaping element at a position disposed between the light source and the treatment surface, each of said screens comprising a light transmissive region with an irregularly shaped boundary, wherein the irregularly shaped boundary of the illuminated area corresponds to the irregularly shaped boundary of the light transmissive region;
• wherein the irregularly shaped boundary is composed of three or more segments, each segment being sinusoid-like;
• and
• wherein the shape of the boundary of the light transmissive region of each screen varies from screen to screen.