Indexed multi-level selector for light beam with different but adjacent wavelengths

A light source for switching a light beam with different wavelengths, wherein the light source covers a range of wavelengths, the light source comprising:

• a series of light emitting diodes (LEDs) arranged in a circular or semicircular pattern, where each LED is associated with a channel and has a wavelength falling within the range of wavelengths;
• a rotational center mirror and/or a dichroic plate;
• and
• a rotational apparatus that controls rotation and/or switching speed of the rotational center mirror and/or the dichroic plate so that light from the LEDs associated with a desired wavelength and bandwidth of light is directed by the rotational center mirror and/or the dichroic plate,
• wherein the LEDs have a different plane of incidence but a same incident ray angle with respect to the rotational center mirror and/or the dichroic plate when the rotational center mirror and/or the dichroic plate is aligned with a corresponding channel, where a reflected output light beam of the light source is reflected in an output direction by the rotational center mirror,
• wherein the rotational center mirror and/or the dichroic plate, as controlled by the rotational apparatus, acts as a switch for light beams with different wavelengths that are received from the LEDs, and
• wherein the dichroic plate combines light beams with different wavelengths that is received from different LEDs within a first layer, the dichroic plate thus serving as a filtering element for suppressing out of band light in the reflected output light beam.