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US 8,708,528 B2Granted
Multiple focus point light
AssigneeProduction Resource Group, LLC
InventorsThomas A. Hough, James Bornhorst
Life of this patent
Estimating the term…
Abstract
A lamp unit with a relay lens that allows two different focus points. Two different optical altering elements are hence simultaneously in focus. The elements can be taken in and out of focus to allow different effects.
Claims23
A lighting device comprising:
- a light source forming light along a light path;
- a lens, located along said light path, said lens having movable parts, said movable parts moving to define both in focus and out of focus locations of the lens, and defining first locations which can be brought into focus by said moving and also can be brought out of focus by said moving, and second locations which are always out of focus;
- first and second optical elements, in a third path location along the light path, to receive said light from said light source, both said first and second optical elements being in first locations which can be brought into focus, but where only one of said first and second optical elements can be in focus at any one time, said first and second optical elements being located on the path between said lens and said light source;
- third and fourth optical elements, located in a fourth path location along the light path, on an opposite side of said lens from said light source, and receiving light from said light source that has passed through said first and second optical elements, and where only one of said third and fourth optical elements can be in focus at any one time, but where one of said first and second optical elements can be in focus at the same time as one of said second and third optical elements;
- at least one lens part moving motor, moving said movable parts of said lens to bring said optical elements into focus;
- and
- a fifth optical element at one of said second locations which is an out of focus location that is always out of focus.
4 more elements
A lighting device comprising:
- a light source forming light;
- a lens, having movable parts, said movable parts moving to define both in focus and out of focus locations of the lens, and defining first locations which can be brought into focus by said moving and also can be brought out of focus by said moving, and second locations which are always out of focus;
- first and second optical elements, in a third path location to receive said light from said light source, both said first and second optical elements being in first locations which can be brought into focus, but where only one of said first and second optical elements can be in focus at any one time, said first and second optical elements being located between said lens and said light source;
- third and fourth optical elements, located in a fourth path location, on an opposite side of said lens from said light source, and receiving light from said light source that has passed through said first and second optical elements, and where only one of said third and fourth optical elements can be in focus at any one time, but where one of said first and second optical elements can be in focus at the same time as one of said second and third optical elements;
- at least one lens part moving motor, moving said movable parts of said lens to bring said optical elements into focus;
- and
- a controller, controlling said at least one lens part moving motor to bring one of said first and second optical elements into focus at the same time as one of said second and third optical elements.
4 more elements
A method of operating a lighting device comprising:
- creating light along a light path;
- using a relay lens, located along said light path, said relay lens having movable parts;
- moving said movable parts moving to define both in focus and out of focus locations of the relay lens;
- said using comprising defining first locations which can be brought into focus by said moving and also can be brought out of focus by said moving, and also defining second locations which are always out of focus;
- locating first and second optical elements, in a third path location along the light path, to receive said light from said light source, both said first and second optical elements being in first locations which can be brought into focus, but where only one of said first and second optical elements can be in focus at any one time, said first and second optical elements being located on the path between said lens and a light source;
- locating third and fourth optical elements, located in a fourth path location along the light path, on an opposite side of said lens from said light source, and receiving light from said light source that has passed through said first and second optical elements, and where only one of said third and fourth optical elements can be in focus at any one time, but where one of said first and second optical elements can be in focus at the same time as one of said second and third optical elements;
- moving said movable parts of said lens to bring said optical elements into focus;
- and
- locating a fifth optical element at one of said second locations which is an out of focus location that is always out of focus.
6 more elements
Dependencies are inferred from the claim text.