Minute structure for showing colors by reflection and interferen

Details Minute structure for showing colors by reflection and interferen Minute structure for showing colors by reflection and interferen

1993-06-21

1995-04-18

Ryan, Patrick J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including interlaminar mechanical fastener

428 38, 428224, B32B 900

Patent

active

054077389

ABSTRACT:
A minute structure for showing colors by reflection and interference of natural light includes a plurality of fin portions and a central portion for uniting the fin portions. The fin portions are aligned in a first direction and positioned such that the adjacent fin portions are spaced from each other so as to define therebetween a void space which is filled with air. Each fin portion has a first width defined in a second direction which is perpendicular to the first direction and a second width defined in the first direction. The void space has a third width which is defined in the first direction. The central portion has a fourth width defined in the second direction. The first width of each fin portion is three times or more larger than the fourth width of the central portion. The third width of the void space ranges from 0.02 .mu.m to 0.4 .mu.m. The second width of each fin portion is not less than 0.02 .mu.m. A refractive index of each fin portion ranges from 1.2 to 1.8. A maximum production error from a standard value with respect to the second width of each fin portion is not larger than 40%. Thus, the minute structure reflects ultraviolet rays and infrared rays and shows, for example, a bluish purple tint or a bluish green tint by reflection and interference of visible light rays.

REFERENCES:
patent: 4514459 (1993-04-01), Nakagawa et al.
Seni Kikai Gakkaisi, vol. 41, No. 2, 1989, pp. T18-T26.

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