Abstract: A dermatologic treatment apparatus is disclosed that is cordless and sufficiently compact as to be hand-held. A self-contained housing is configured for gripping by a person's hand for cordless manipulation in a dermatologic treatment procedure. A light source and electrical circuit are contained within the housing. The circuit includes one or more batteries and an electronic control circuit for energizing the light source to produce output light pulses. A light path is within the housing including an aperture through which the output light pulses are propagated out of the housing having properties sufficient for providing efficacious treatment.

Abstract: A diffuse light source assembly and method including a light source for generating forward propagating light, a solid lightguide disposed adjacent the light source, a diffuser and a back reflecting surface. The solid lightguide includes an input face for receiving the forward propagating light, a sidewall for conveying the forward propagating light via total internal reflection, and an output face for transmitting the forward propagating light. The diffuser is disposed adjacent the output face for diffusing the transmitted forward propagating light, wherein a portion of the forward propagating light is transformed into reverse propagating light, by at least one of the output face and the diffuser, that is conveyed by sidewall via total internal reflection and transmitted by the input face. The back reflecting surface is disposed adjacent the light source for reflecting the reverse propagating light back into the lightguide via the input face.