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US 2015/0308665 A1Published application
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.
Claims17
A lighting device comprising:
- a relay lens, having a movable first part and a movable second part, said first part in a location to receive an optical image from a first image plane, and said second part receiving optical energy from the first part and relaying the optical image on a second image plane, near the second part;
- and
- an effect moving part having a motor that moves an optical effect-creating optical part into a stop area between the first part and the second part, said motor moving the optical effect creating optical part only part of the way into the stop.
A method comprising:
- operating a lighting device using a relay lens, having a movable first part and a movable second part, said first part in a location to receive an optical image from a first image plane, and said second part receiving optical energy from the first part and relaying the optical image on a second image plane, near the second part;
- and
- using a motor to move an optical effect-creating optical part only part way into a stop area between the first part and the second part, based on a control.
Dependencies are inferred from the claim text.