Method of adjusting a light source for color temperature and chromaticity

A method of manufacturing a light source having predetermined color temperature or chromaticity characteristics, comprising the steps of:

• mounting a concave reflector, having a substantially ellipsoidal-shaped reflecting surface and having a near focus and a far focus disposed along an optical axis, in a supporting fixture;
• selecting a metal halide discharge arc lamp that emits radiant energy in at least two substantially distinct spectral bands;
• mounting said lamp in an adjustable fixture;
• positioning said lamp, by adjusting said adjustable fixture, in proximity to the near focus of said concave reflector such that a substantial amount of radiant energy emitted from said radiant energy source is directed to the far focus of said reflector;
• adjusting the position of said lamp, as defined by a three-dimensional coordinate system, each coordinate of said lamp position being adjusted until a maximum intensity of light is produced at the far focus of said concave reflector;
• measuring the color temperature or chromaticity characteristics of the light produced at the far focus of said concave reflector;
• and if said characteristics are not as predetermined, then
• adjusting the position of said lamp along a line parallel to the optical axis of said concave reflector until the color temperature or chromaticity characteristics of the light at the far focus of said reflector are as predetermined;
• cementing said lamp into a collar of said concave reflector at the finally adjusted position to produce a completed assembly;
• and removing said completed assembly from the supporting fixture.