Adjustable light source

A light source comprising:

• a light emitting device;
• and
• a variable spectrum adjuster in a light path of light emitted by the light emitting device, wherein:
• the light emitting device and the spectrum adjuster are positionable relative to one another;
• the spectrum adjuster comprises a wavelength-shifting region comprising wavelength-shifting material, the wavelength-shifting material having a continuously varying wavelength-shifting property based on position in the wavelength-shifting region;
• and
• the wavelength-shifting region has dimensions greater than the cross-sectional dimensions of the light path at the spectrum adjuster.

A light source comprising:

• a light emitting device;
• a variable color attenuator and a variable wavelength shifter in tandem in a light path of light emitted by the light emitting device, wherein:
• the color attenuator, the wavelength shifter, and the light path are variably positionable relative to one another;
• the color attenuator comprises a first region of color-attenuating material for attenuating a first portion of the spectrum of light incident thereon, the color-attenuating material having a continuously varying color-attenuating property based on position in the first region;
• the first region has a first area greater than the cross-sectional dimensions of the light path at the color attenuator;
• the wavelength shifter comprises a second region of wavelength-shifting material, the wavelength-shifting material having a continuously varying wavelength-shifting property based on position in the second region;
• and
• the second region has a second dimensions greater than the cross-sectional dimensions of the light path at the wavelength shifter.

A light source comprising:

• a light emitting device;
• and
• a variable spectrum adjuster in a light path of light emitted by the light emitting device, wherein:
• the light path of light emitted by the light emitting device and the variable spectrum adjuster are positionable relative to one another;
• the spectrum adjuster comprises a spectrum-adjusting region comprising spectrum-adjusting material, the spectrum-adjusting material having a continuously varying spectrum-adjusting property based on position in the spectrum-adjusting region;
• and
• the region has dimensions greater than the cross-sectional dimensions of the light path at the spectrum adjuster.

A method of adjusting light from a light emitting device, the method comprising:

• providing a variable spectrum adjuster within a light path of light emitted by the light emitting device, wherein:
• the light emitting device and the spectrum adjuster are positionable relative to one another;
• the spectrum adjuster comprises a spectrum-adjusting region comprising spectrum-adjusting material, the spectrum-adjusting material having a continuously varying spectrum-adjusting property based on position in the spectrum-adjusting region;
• and
• the spectrum-adjusting region has dimensions greater than the cross-sectional dimensions of the light path at the spectrum adjuster;
• and
• changing a positional relationship between the variable spectrum adjuster and the light path of the light emitted by the light emitting device to adjust the spectrum of the light emitted by the light emitting device.