Method and apparatus for rotational adjustment of optics
OwnerGabor Vamberiinventor
Life of this patent
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Abstract
A method and apparatus is provided that enables the rotational adjustment of a non rotationally-symmetrical optical element in order to change the direction of the emitted light from an LED emitter of a lighting unit or to change the overall luminous distribution pattern in a luminaire including a plurality of LED emitters and optical elements. The apparatus enables simple and accurate rotational adjustment, while providing for the retaining of the selected rotational position of the optical element. The adjustment can be made before or after the installation of the lighting unit or luminaire, and can be accomplished without requiring tools and expert personnel.
Claims20
A luminaire comprising:
- a housing;
- and
- a plurality of lighting units mounted on or in the housing, at least one of said plurality of lighting units including:
- an LED emitter rigidly mounted to the housing and including a light emitting surface;
- a bezel mounted for rotation relative to the LED emitter;
- an asymmetric optical element for projecting light from the LED emitter, said optical element being rigidly attached to the bezel,
- a ring fixed relative to both the housing and the LED emitter, with one of the housing and said ring including one of an indicator and graphic markings, and
- a position indicating dial provided on the bezel, with the position indicating dial including another of the indicator and the graphic markings, with the indicator being configured to be aligned with one of the graphic markings upon rotation of the bezel to indicate an angular interval of rotation of the bezel,
- wherein rotatable adjustment of the bezel causes angular adjustment of the optical element relative to the LED emitter to alter a light direction of light emitted from the at least one of the plurality of lighting units and thereby alter a light dispersion pattern of the luminaire.
A lighting unit comprising:
- an LED emitter including a light emitting surface;
- a bezel mounted for rotation relative to the LED emitter;
- and
- an asymmetric optical element for projecting light from the LED emitter, said optical element being rigidly attached to the bezel, wherein rotatable adjustment of the bezel causes angular adjustment of the optical element relative to the LED emitter to alter a light direction of light emitted from the lighting unit;
- a ring fixed relative to and the LED emitter, said ring including one of an indicator and graphic markings, and
- a position indicating dial provided on the bezel, with the position indicating dial including another of the indicator and the graphic markings, with the indicator being configured to be aligned with one of the graphic markings upon rotation of the bezel to indicate an angular interval of rotation of the bezel.
A method of adjusting optics of a lighting unit including an LED emitter having a light emitting surface and an asymmetric optical element comprising:
- rotating a bezel relative to a fixed LED emitter, wherein rotatable adjustment of the bezel causes angular adjustment of the optical element relative to the LED emitter to alter a light direction of light emitted from the lighting unit;
- and
- aligning an indicator, provided on one of a ring fixed relative to the LED emitter and a position indicating dial provided on the bezel, with graphic markings, provided on another of the ring and the position indicating dial, upon rotation of the bezel to indicate an angular interval of rotation of the bezel.
Dependencies are inferred from the claim text.