Abstract: The invention relates to a projector (1) for projecting an image (6), comprising: a light source (2) for generating a light bundle (12); a pivotable deflection unit (3) designed for deflecting the light bundle (12) generated by the light source (2) onto a projection surface (5); and an imaging device (7, 8, 9) for imaging an aperture of the deflection unit (3) onto the projection surface (5); wherein the imaging device (7, 8, 9) comprises a mirror objective (7) having at least two mirror elements (8, 9). The invention further relates to a corresponding method.

Abstract: In a method for projecting an image onto a projection area (10) by at least one first (110) and second (210) beam, in order to create an improved image on the projection area, the deviation of the projection of the first and second beam on the projection area is determined, and the intensity of the first and/or second beam is varied over time according to the previously determined deviations.

Abstract: An optoelectronic device for projecting a first beam (110) of coherent first electromagnetic radiation onto a surface (91) comprises a first radiation source (11), which is suitable for emitting a first beam (110) of coherent first electromagnetic radiation when in operation. The optoelectronic device additionally comprises a first phase-modifying element (21) in the beam path of the first electromagnetic radiation for changing the phase of the first electromagnetic radiation in a subzone (1102) of the first beam (110) and a radiation-directing element (4) in the beam path of the first electromagnetic radiation for changing a beam direction (P1, P2) of the first beam (110).

Abstract: A projection apparatus comprising a light source, an image display device and at least one filter device for transmitting a first portion of the radiation from the light source in a first wavelength range in the visible range to the image display device, and for diffusely reflecting a second portion of the radiation in a second wavelength range outside the visible range.

Abstract: A lamp module is disclosed, in particular for projectors for data or video projection, having at least one lamp (2) which is inserted into a reflector (4) and has a discharge vessel (6) with two lamp shafts (8, 10) arranged diametrically opposite one another. According to the invention, a light-deflecting optical lens (12) is provided in order to deflect the radiation emitted from the lamp from the outlet-side lamp shaft (10).

Abstract: A circuit arrangement for operating a discharge lamp, wherein the circuit arrangement comprises a commutation device, which has an input which is coupled to a DC source, and has an output which can be coupled to a discharge lamp. The commutation device is designed in such a way that it couples the DC source to the output, and the polarity at which the DC source is coupled to the output can be commutated by a control device. The control device has a sync input, and the polarity of the DC source is commutated in synchronism with sync pulses of a sync signal which can be applied at the sync input. The control device has a measuring input, which is coupled to a measuring device which is designed to provide a measured value which is a measure of the size of electrode peaks. The control device suppresses at least one commutation if the measured value overshoots or undershoots a predetermined threshold value.

Abstract: A method for reducing the effects of fluctuations in the light intensity of an effective light which is emitted by a discharge lamp, is focused by a reflector and is coupled into a light-collecting optical unit with a defined étendue at a defined acceptance angle. The method comprises the steps of: defining an effective luminous flux maximum depending on étendue, acceptance angle and/or reflector properties, and changing the reflector properties, the acceptance angle and/or the étendue in such a way that the effective luminous flux maximum is reduced by a definable percentage magnitude.

Abstract: There is disclosed a lamp module, in particular for projectors for data or video projection, having at least one AC burner that is designed for AC operation, is inserted into a reflector and has a discharge vessel with two burner shafts, arranged diametrically relative to one another that carry a reflector electrode and a front electrode, it being possible for the light emitted by the AC burner to be fed to an optical system via the reflector. According to the invention, the front electrode has a large surface by comparison with the reflector electrode, such that said surface is more resistant to retroreflected light.

Abstract: A bulb for a discharge lamp, includes an inner burner chamber, the outer contour of the bulb and the burner chamber each having a central region and adjacent edge regions, each central region being toroidal, and each edge region of the burner chamber adapted to be in the form of a truncated cone away from the central region and rotationally symmetrically with respect to the bulb axis, at a specific angle of taper. The midpoints of the circle segments, which form the central region of the outer contour and of the burner chamber, have a distance in the direction of the bulb axis; and/or the angles of taper of the two edge regions of the burner chamber are not the same; and/or the bulb axis lies between the circle segment, which forms the central region of the outer contour and/or of the burner chamber, and its midpoint.

Abstract: An inventive method for determining the bulb temperature (T) of high pressure discharge lamps is disclosed that comprises the following steps: ascertaining a first spectral radiant power (MP) at a first wavelength (?P); ascertaining a second spectral radiant power (MC) at a second wavelength (?C) different from the first; determining the quotient (?) from the first and second radiant power; and determining the temperature (T) of the bulb on the basis of this quotient. It likewise discloses an apparatus for carrying out the inventive method.

Abstract: The invention relates to a method for designing a discharge lamp for use with a light-gathering system, in particular of a projector for data or video projection. Also disclosed are a lamp designed using such a method and a reflector provided therefore.

Abstract: A bulb for a discharge lamp, includes an inner burner chamber, the outer contour of the bulb and the burner chamber each having a central region and adjacent edge regions, each central region being toroidal, and each edge region of the burner chamber adapted to be in the form of a truncated cone away from the central region and rotationally symmetrically with respect to the bulb axis, at a specific angle of taper. The midpoints of the circle segments, which form the central region of the outer contour and of the burner chamber, have a distance in the direction of the bulb axis; and/or the angles of taper of the two edge regions of the burner chamber are not the same; and/or the bulb axis lies between the circle segment, which forms the central region of the outer contour and/or of the burner chamber, and its midpoint.

Abstract: An inventive method for determining the bulb temperature (T) of high pressure discharge lamps is disclosed that comprises the following steps: ascertaining a first spectral radiant power (MP) at a first wavelength (?P); ascertaining a second spectral radiant power (MC) at a second wavelength (?C) different from the first; determining the quotient (?) from the first and second radiant power; and determining the temperature (T) of the bulb on the basis of this quotient. It likewise discloses an apparatus for carrying out the inventive method.

Abstract: The invention relates to a method for designing a discharge lamp for use with a light-gathering system, in particular of a projector for data or video projection. Also disclosed are a lamp designed using such a method and a reflector provided therefore.