High speed, high efficiency optical pattern generator using rotating optical elements
AssigneeReliant Technologies, Inc.
InventorsLeonard C. DeBenedictis, C. David Nabors, George Frangineas
Life of this patent
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Abstract
An optical pattern generator includes one or more multi-faceted rotating optical elements that introduce an offset that is rotation insensitive. The component that generates the offset is rotationally symmetric around the rotational axis of the optical element. Thus, as the optical element rotates, the effect of the offset component does not change. In addition, rotating optical elements may be designed to counteract unwanted optical effects of each other.
Claims24
An optical pattern generator that creates a pattern of figures on a target surface, the pattern generator comprising:
- a first multi-faceted rotating optical element having a rotational axis and a plurality of facets with optical power that rotate around the rotational axis, at least two of the facets having different optical power;
- a second multi-faceted rotating optical element located downstream of the first optical element, the second optical element having a rotational axis and a plurality of facets with optical power that rotate around the rotational axis, at least two of the facets having different optical power;
- each facet with optical power on the first optical element having a corresponding facet with optical power on the second optical element, the first and second optical elements counter-rotating through an incident optical beam;
- and
- one or more imaging optical elements that focus the optical beam, creating a pattern of figures on a target surface as the optical elements counter-rotate through the optical beam.
An optical pattern generator for deflecting an optical axis, the pattern generator comprising:
- a first multi-faceted rotating optical element having a rotational axis and a plurality of facets with optical power that rotate around the rotational axis;
- and
- a second multi-faceted rotating optical element located downstream of the first optical element, the second optical element having a rotational axis and a plurality of facets with optical power that rotate around the rotational axis;
- each facet with optical power on the first optical element having a corresponding facet with optical power on the second optical element, the corresponding facets counter-rotating through an incident optical axis in synchronization.
A method of creating an optical pattern comprising:
- forming an optical laser treatment beam;
- rotating a first multi-faceted optical element having a plurality of facets with optical power around a rotational axis;
- rotating a second multi-faceted optical element having a plurality of facets with optical power around a rotational axis, the first and second multi-faceted optical elements counter-rotating relative to an optical axis of the optical laser treatment beam;
- directing the optical laser treatment beam towards the counter rotating optical elements, the counter rotating optical elements scanning the optical laser treatment beam to form a pattern of optical figures on a selected target tissue to be treated, the optical laser treatment beam illuminating the target tissue for a duration sufficient to cause a clinical effect;
- and
- moving the counter-rotating optical elements relative to the target tissue during illumination of the target tissue.
Dependencies are inferred from the claim text.