Constrained folded path resonant white light scintillator

A constrained folded path cavity comprising:

• a first reflector defining an aperture for a light source;
• a second reflector opposite the first reflector, at least one of the first and second reflectors being a conic;
• and
• a light conversion medium between at least a portion of the first reflector and at least a portion of the second reflector, the light conversion medium including phosphor dispersed in a resin to convert light emitted by the light source from a first wavelength to a second wavelength, the second wavelength being longer than the first wavelength.

An optical emitter comprising:

• a first conic reflector;
• a second conic reflector opposite the first conic reflector;
• a third conic reflector opposite the second conic reflector and adjacent the first conic reflector;
• a negative minor adjacent the vertex of the second conic reflector;
• and
• a translucent light conversion element between the first and second conic reflectors.