Auxiliary illuminating device having an adjustable color temperature by controlling the amount of light passing through color filters
First Claim
Patent Images
1. A light source with an adjustable color temperature, comprising:
- a broadband light source;
at least one color filter having a first color;
at least one color filter having a second color;
the at least one color filter having the first color and the at least one color filter having the second color configured to allow light from the broad band light source to pass through the filters;
at least one variable shutter configured to variably block the light passing through the at least one color filter having the first color;
at least one variable shutter configured to variably block the light passing through the at least one color filter having the second color;
a control system, the control system able to adjust the ratio of light passing through the color filter having the first color with respect to the color filter having the second color.
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Abstract
An auxiliary illuminating device that has an adjustable color temperature. The color temperature is adjusted by varying the light throughput of independently adjustable color filters.
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Citations
12 Claims
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1. A light source with an adjustable color temperature, comprising:
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a broadband light source;
at least one color filter having a first color;
at least one color filter having a second color;
the at least one color filter having the first color and the at least one color filter having the second color configured to allow light from the broad band light source to pass through the filters;
at least one variable shutter configured to variably block the light passing through the at least one color filter having the first color;
at least one variable shutter configured to variably block the light passing through the at least one color filter having the second color;
a control system, the control system able to adjust the ratio of light passing through the color filter having the first color with respect to the color filter having the second color. - View Dependent Claims (2, 3, 4)
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5. A light source with an adjustable color temperature, comprising:
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a broad band light source;
at least one first color filter having a first color, the first color filter configured to allow light from the broad band light source to pass through the first color filter;
at least one second color filter having a second color, the second color filter configured to allow light from the broad band light source to pass through the second color filter;
at least one third color filter having a third color, the third color filter configured to allow light from the broad band light source to pass through the third color filter;
at least one first variable shutter configured to variably block the light passing through the at least one first color filter having the first color;
at least one second variable shutter configured to variably block the light passing through the at least one second color filter having the second color;
at least one third variable shutter configured to variably block the light passing through the at least one third color filter having the third color;
a control system, the control system able to adjust the ratio of light passing through the three color filters. - View Dependent Claims (6, 7, 8)
a fourth color filter, the fourth color filter transmitting light over a fourth wavelength band.
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9. A light source with an adjustable color temperature, comprising:
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a broad band light source;
a plurality of first color filters having a first color, the first color filters configured to allow light from the broad band light source to pass through the first color filters;
a plurality of second color filters having a second color, the second color filters configured to allow light from the broad band light source to pass through the second color filters;
a plurality of first shutters configured to block the light passing through the plurality of first color filters having the first color;
a plurality of second shutters configured to block the light passing through the plurality of second color filters having the second color;
a control system, the control system able to adjust the ratio of light passing through the first color filters having the first color with respect to the second color filters having the second color, by changing the number of color filters blocked by the shutters. - View Dependent Claims (10, 11)
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12. A light source with an adjustable color temperature, comprising:
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a broad band light source;
at least one first color filter having a first color, the first color filter configured to allow light from the broad band light source to pass through the first color filter;
at least one second color filter having a second color, the second color filter configured to allow light from the broad band light source to pass through the second color filter;
means for variably blocking the light passing through the at least one first color filter having the first color;
means for variably blocking the light passing through the at least one second color filter having the second color;
a control system, the control system able to adjust the ratio of light passing through the first color filter having the first color with respect to the second color filter having the second color.
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Specification