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KMID : 0380319720080000007
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Journal of Korean Research Institute for Better Living
1972 Volume.8 No. 0 p.7 ~ p.17
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A Study of the Design and Manufacture for the Optical System-Apparatus of Moire´ Fringes
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Abstract
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When two optical gratings are brought into contact face to face through an optical system, Moire´ fringe are seen lying pependicular to the ruling direction of the gratings.
In this paper, discussion about and analysis of the visibilities of the Moire´fringe are included.
As the optical system, I took an optical system-apparatus with "grating-holder" which is designed and manufactured in order to enhance obsevations and photographs of the Moire´fringe-profiles. This system depends on θ?? and spacer t?? changes between two gratings G_1 and G_2, and the diffraction gratings are two Leflica gratings which have a grating constant ω_1=ω_2=1.69μ and grating number N_1=N_2=592lines/mm.
The configurations of optical system-apparaturs are organized by the oberving-system of "minimum deviation." The results showde that, in general the contrast of the fringes depends on the transmittance of the grating-i.e. the greater the transmittance of the gratings, the lower the contrast of the fringes that will result. All theses results have been confirmed by this experiment.
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