Secondary optical lens with adjustable beam angle
A technology of secondary optical lens and beam angle, applied in the optical field, can solve the problem of uniform light spot of multi-chip LED.
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[0024] The content of the invention will be described in detail below with reference to the drawings and specific embodiments.
[0025] Such as figure 1 As shown, a secondary optical lens with adjustable beam angle includes a light-condensing part 1 located in the central area of the lens and a total reflection part 2 surrounding the outer edge of the light-concentrating part 1. Among them, when the light-emitting surface center O point of the multi-chip LED is located at the focal position of the secondary optical lens, the light emitted from the light-emitting surface center O point of the multi-chip LED and the light with a small angle with the optical axis OZ will be The light collecting part 1 in the middle collects, converges and mixes light within the range of divergence angle ±Δθ; the light rays with a larger angle with the optical axis OZ are collected by the total reflection part 2 on the outer edge, and are also collected Converge and mix light within the range of di...
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