Abstract:
A lighting device with an extended, non-punctiform light source, a reflector which conically surrounds the light source, and a lens for concentrating the emitted light is characterised by the fact that the lens is mounted so as to be capable of moving along an optical axis of the lighting device within a predetermined range of movement in such a way that the focal point of the lens in the direction of emission can be shifted at least into an area behind the notional apex of the reflector.
Abstract:
An LED illumination module has a light-emitting diode and a rotationally symmetrical, one-piece, light-transparent adapter lens centered on a lens axis. This lens has an axially rearwardly open blind hole defined by a radially inwardly directed frustoconical light-receiving side surface and an axially rearwardly directed convex light-receiving base surface. The diode is axially shiftable in the hole. An axially forwardly directed convex light-output surface is coaxially surrounded by an axially forwardly directed and forwardly flaring frustoconical light-output surface. A radially outwardly directed and radially inwardly reflective surface extends generally from a front edge of the axially forwardly directed frustoconical light-output surface to a rear edge of the radially inwardly directed frustoconical surface.
Abstract:
A lighting device with an extended, non-punctiform light source, a reflector which conically surrounds the light source, and a lens for concentrating the emitted light is characterized by the fact that the lens is mounted so as to be capable of moving along an optical axis of the lighting device within a predetermined range of movement in such a way that the focal point of the lens in the direction of emission can be shifted at least into an area behind the notional apex of the reflector.
Abstract:
A lighting device with variable angle of emission includes a light source, and a lens system comprising two lenses, a primary lens and a secondary lens. The two lenses and the light source are arranged along an optical axis and the distance between the primary lens and the secondary lens is variable, in order to vary the angle of emission of the cone of light rays generated by the lighting device. In one example, the primary lens has a numerical aperture of at least 0.7, the primary lens is an aplanat, and the secondary lens is designed so as to image to infinity, at a certain distance of the secondary lens from the primary lens, a virtual image of the light source generated by the primary lens. According to a second aspect, the illumination factors are distinguished by the fact that the primary lens has a numerical aperture of at least 0.7, and that the secondary lens may be moved by a distance extending in a range in which the secondary lens does not capture the whole of the cone of light rays generated by the primary lens.
Abstract:
The invention relates to an LED illumination module having an LED (23) and a rotationally symmetrical, integral, light-transparent auxillary optic (10) having an inner converging lens part (14) and an outer reflector part (16). The auxiliary optic (10) has an opening (11) in the form of a blind hole which is arranged at the rear and in which the LED (23) can be displaced longitudinally and axially along the optical axis (20) such that, owing to the displacement, a change in the cone of light from a cone of light having a cone angle ≦12° to a cone angle ≧20° can be produced and, in at least one LED position with respect to the opening (11) of the auxiliary optic (10), an inner region of the cone of light is illuminated homogeneously over a cross-sectional area at right angles to the optical axis (20).
Abstract:
A lighting module for the stationary illumination of traffic routes comprises a plurality of light-emitting diodes and a light-shaping element. The light-shaping element comprises a plurality of refractive optical free-form surfaces for shaping light and at least one light-scattering area, which is configured to radiate, during the operation of the lighting module, diffused light originating from the light-emitting diodes. A traffic route luminaire comprises a housing and a plurality of lighting modules that are disposed in such a way in the housing that the longitudinal axes of the lighting modules extend next to each other and parallel to each other and the light-radiating faces of the lighting modules are disposed in a sawtooth shape relative to one another. The design according to the invention on the one hand enables a good illumination of the traffic route area and, on the other hand, prevents glare or disturbance to passers-by or residents.