Simple past tense and past participle of collimate.(verb)
Of light beams whose rays are parallel and thus has a plane wavefront(adjective)
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Use "collimated" in a sentence
"The company is talking about using it for specialized applications: The result is a lamp that produces exceptionally high light output and 'collimated' or very focused white light at a much lower cost than current high pressure metal halide sources."
"Previous SPRM/SPRF systems using lasers have exhibited good performance utilizing the highly desirable qualities of laser sources such as collimated output, high power and narrow bandwidth"
"In other words, light shining through the atmosphere is a bit diffuse and may not stay collimated."