Animation and GOBO forming means for illumination device

Patent metadata

Field	Value
Publication number	US-9719668-B2
Application number	US-201313765989-A
Country	US
Kind code	B2
Filing date	Feb 13, 2013
Priority date	Feb 14, 2012
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

The present invention relates light forming means for modifying a light beam. The light forming means comprises a number of annular gobo segments arranged partially around the center of the light forming means and each of the annular gobo segments has an angular extent allowing the light beam to be enclosed by the annular gobo segment. The light forming means comprises also an annular animation segment forming an annular segment of the light forming means, wherein the angular extent of the animation segment is at least twice as big as the annular extent of at least one of the annular gobo segments. The present invention relates also to a light effect system and illumination device comprising such light forming means.

First claim

The invention claimed is:

1. A method for forming a light beam using a light effect system, the light effect system comprising:
one light effect wheel comprising:
a number of annular gobo segments arranged partially around a center of the light effect wheel, where each of the annular gobo segments comprises a gobo pattern for creating a light pattern, and has an angular extent allowing a light beam passing therethrough to be enclosed by the annular gobo segment; and
an annular animation segment, having an animation pattern, arranged around the center of the light effect wheel, configured to provide a moving pattern upon rotation of the one light effect wheel where an angular extent of the annular animation segment is at least twice as big as the annular extent of at least one of the annular gobo segments, wherein the annular gobo segments and the annular animation segment are annularly embodied about the center of the one light effect wheel, positioned so that only one respective segment can enclose the light beam at a time; and

an actuator adapted to rotate the one light effect wheel about the center; where the method comprises the steps of:
receiving a light beam from a light source, the light beam propagating along an optical axis;
arranging the light effect wheel on the actuator so that an axis perpendicular to, and through the center of, the light effect wheel is parallel to the optical axis;
arranging the light effect wheel and actuator relative to the light source so that:
the light beam is completely enclosed by a respective gobo segment or by the animation segment;
a respective gobo segment or the animation segment is located in a focal point of the light beam, with no other light effect element located within the light beam; and
the annular animation segment is at least twice as big as a cross section of the light beam; and

rotating the light effect wheel about the center, moving the light effect wheel through the light beam, to create various gobo effects and animation effects, wherein:
gobo light patterns separate from animation patterns, and not in combination, are provided by the one light effect wheel;

both the gobo effects and animation effects are provided in the focal point of the light beam; and
varying, dynamic and continuous animation effects, including moving patterns, are provided by way of rotation of the light effect wheel, while the light beam is enclosed within the annular animation segment during rotation of the light effect wheel; wherein the method further comprising the step of varying a speed of rotation of the light effect wheel about the center, wherein an angular velocity of rotation of the light effect wheel is varied between animation positions to create the varying, dynamic and continuous animation effects, where both speed and direction of the moving light patterns are changed, whereby the light effect system can define light effect wheel rotation directions and speed.

2. The method of claim 1 , further comprising the step of rotating the light effect wheel back and forth about the center, between a first animation position and a second animation position, so that the annular animation segment, enclosing and moving through the light beam, provides in the first animation position a first part of the annular animation segment positioned in the light beam, and provides in the second animation position a second part of the annular animation segment positioned in the light beam, wherein the light beam continuously remains positioned in, and enclosed by, the annular animation segment during the rotation of the light effect wheel back and forth between the first and the second animation positions.

3. The method of claim 1 , further comprising the step of positioning the light effect wheel in a number of annular gobo positions, where one of the annular gobo segments is positioned in, and completely encloses, the light beam in each of the number of annular gobo positions.

4. The method of claim 1 , wherein one of the annular gobo segments comprises an aperture larger than the cross section of the light beam, wherein the light beam passes therethrough without modification by the light effect wheel.

5. The method of claim 1 , wherein light effect system further comprises a single motor associated with the actuator, the single motor providing rotational operation of the light effect wheel.

6. The method of claim 1 , wherein, in addition to arranging the light effect wheel and actuator relative to the light source, further comprising the step of:
arranging the light source within a reflector system having one or more reflectors and an exit aperture; and
arranging the one or more reflectors to propagate at least part of the light beam out of the exit aperture along the optical axis of the light effect system so that:
the light beam is completely enclosed by a respective gobo segment or by the animation segment;
a respective gobo segment or the animation segment is located in a focal point of the light beam; and
the annular animation segment is at least twice as big as a cross section of the light beam.

7. The method of claim 1 , wherein the animation pattern of the annular animation segment is arranged thereon such that rotation of the light effect wheel in a single direction causes the animation pattern to move transversely relative to the light beam, wherein the angular extent of the annular animation segment being at least twice as big as the annular extent of at least one of the annular gobo segments, and at least twice as big as the cross section of the light beam, provides that the annular animation pattern moves entirely across the light beam during the continuing actuator rotation in the single direction.

8. A method for forming a light beam using an illumination device, the illumination device comprising:
a light source generating a light beam propagating along an optical axis of the illumination device;
a projecting system positioned along the optical axis to collect and project at least a part of the light beam; and
a light effect system comprising:
one light effect wheel comprising:
a number of annular gobo segments arranged partially around a center of the light effect wheel, where each of the annular gobo segments comprises a gobo pattern for creating a light pattern, and has an angular extent allowing a light beam passing therethrough to be enclosed by the annular gobo segment; and
an annular animation segment, having an animation pattern, arranged around the center of the light effect wheel, configured to provide a moving pattern upon rotation of the one light effect wheel where an angular extent of the annular animation segment is at least twice as big as the annular extent of at least one of the annular gobo segments, wherein the annular gobo segments and the annular animation segment are annularly embodied about the center of the one light effect wheel, positioned so that only one respective segment can enclose the light beam at a time; and

an actuator adapted to rotate the one light effect wheel about the center; where the method comprises the steps of:
arranging the light effect wheel on the actuator so that an axis perpendicular to, and through the center of, the light effect wheel is parallel to the optical axis; arranging the light effect wheel and actuator relative to the light source so that:
the light beam is completely enclosed by a respective gobo segment or by the animation segment;
a respective gobo segment or the animation segment is located in a focal point of the light beam, with no other light effect element located within the light beam; and the annular animation segment is at least twice as big as a cross section of the light beam; and
rotating the light effect whe

Assignees

• Allan Simon
• Martin Professional Aps

Inventors

• Allan Simon

Classifications

• F21V5/00

  Refractors for light sources (characterised by cooling arrangements F21V29/504) · CPC title

• F21W2131/406

  for theatres, stages or film studios · CPC title

• F21S10/007 Primary

  using rotating transparent or colored disks, e.g. gobo wheels · CPC title

• F21V21/30 Primary

  Pivoted housings or frames · CPC title