摘要:
Provided is a lighting apparatus that is suitable as a substitute for a conventional halogen lamp when positively utilizing leaked light. The lighting apparatus comprises: a heat dissipator 12 that is in one of a bottomed cylindrical shape and a bowl shape, and that has a bottom portion, a circumferential wall portion, and an opening; and a light-emitting device 18b that is provided inside the heat dissipator 12 at the bottom portion and is operable to emit light, wherein the heat dissipator 12 has one or more windows 19 for leaking the emitted light outside the heat dissipator 12.
摘要:
A method is described for constructing an asymmetrical reflector (1), comprising a first phase to construct a rear portion (2) from a first rotationally symmetrical solid (P) with respect to an axis of direction (V), a second phase to construct a front portion (3) from a second rotationally symmetrical solid (E) with respect to a geometrical axis (A), and a third phase to join together the rear portion (2) and the front portion (3) of said asymmetrical reflector (1).
摘要:
The invention relates to a luminaire (2) and an illumination system (12). The luminaire according to the invention comprises a light exit window (30) for emitting light from the luminaire, and a reflective screen (40) arranged opposite the light exit window. The luminaire further comprises a light source (20) which is arranged for indirect illumination of the light exit window via the reflective screen. The light source is arranged near the light exit window on an imaginary plane P substantially parallel to the light exit window and emits light away from the light exit window. The luminaire further comprises a specularly reflective part (43) as part of the reflective screen, which specularly reflective part is concavely shaped for reflecting at least part of the light emitted by the light source towards a diffusely reflective part (42) of the reflective screen. The luminaire according to the invention has the effect that use of the specularly reflective part allows an improved controlled reflection of the portion of the light emitted by the light source towards the diffusely reflective part.
摘要:
Light sources with arrangements of multiple LEDs (or other light-emitting devices) (102) disposed at or near the focus (106,108) of a reflecting optic (104) having multiple segments facilitate varying the angular distribution of the light beam (e.g., the beam divergence) via the drive currents supplied to the LEDs (102).