Diffuser
A diffusion element is configured by combining: a structure for diffusion constituted by combining periodic surface structures having multiple periods to achieve a light intensity distribution in which the light intensity is uniform at angles less than or equal to a predetermined diffusion angle θ a...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A diffusion element is configured by combining: a structure for diffusion constituted by combining periodic surface structures having multiple periods to achieve a light intensity distribution in which the light intensity is uniform at angles less than or equal to a predetermined diffusion angle θ and the light intensity is as close as possible to zero intensity at angles greater than the diffusion angle θ; and a diffractive structure having a period of 1 or more and 2 or less times of Λmax, where Λmax is the maximum period of the structure for diffusion. |
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