Multisource illumination device with variable F-number
AssigneeMartin Professional ApS
InventorDennis Thykjaer Joergensen
Life of this patent
Estimating the term…
Abstract
A method for controlling a multisource illumination device in gated optical system is provided. A plurality of light sources is divided into groups, and wherein each group is characterized by a respective radial distance from a primary optical axis. Therein, the dimming level of a group is controlled independently from the dimming level of other groups based on the radial distance of the group from the primary optical axis.
Claims20
A method for controlling a multisource illumination device, which comprises a plurality of light sources, wherein each light source generates a source light beam propagating at least partially along a primary optical axis of the multisource illumination device, wherein the plurality of light sources is divided into a plurality of groups based on a radial distance of each light source from the primary optical axis, wherein each group is located at a respective radial distance from the primary optical axis, wherein the radial distance of each group is different from the radial distances of the other groups, the method comprising:
- controlling a dimming level of each group independently from the dimming level of the other groups;
- and
- controlling the dimming level of each group in such a way that all of the plurality of light sources of one group have a same light output, wherein the light output is at least partly directed towards an optical gate, and wherein a dimming level of a group of light sources is correlated to the radial distance of the group of light sources from the primary optical axis.
A multisource illumination device comprising:
- a plurality of light sources, wherein each light source generates a source light beam propagating at least partially along a primary optical axis of the multisource illumination device, wherein the plurality of light sources are divided into a plurality of groups based on a radial distance of each light source from the primary optical axis, wherein each group is located at a respective radial distance from the primary optical axis, wherein the radial distance of each group is different from the radial distances of the other groups;
- a controller configured to control a dimming level of each group independently from dimming levels of the other groups and configured to control the dimming level of each group in so that all light sources of one group have the same light output;
- and
- at least one optical gate;
- wherein the controller is configured to control the dimming level of each group of the light sources based on the radial distance of the corresponding group from the primary optical axis.
A multisource illumination device comprising:
- a plurality of light sources, wherein each light source generates a source light beam propagating at least partially along a primary optical axis of the multisource illumination device, wherein the plurality of light sources are divided into a plurality of groups based on a radial distance of each light source from the primary optical axis, wherein each group is located at a respective radial distance from the primary optical axis, wherein the radial distance of each group is different from the radial distances of the other groups;
- and
- a controller configured to control a dimming level of each group independently from the dimming levels of the other groups and configured to control the dimming level of each group in such a way that all light sources of one group have the same light output;
- wherein the controller is configured to control the dimming level of each group of the light sources based on the radial distance of the corresponding group from the primary optical axis.
Dependencies are inferred from the claim text.