著者

藤本 定正

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.37, no.434, pp.184-189, 1971-03-05 (Released:2009-06-30)

参考文献数

6

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There are two kinds of worked surfaces turned with diamond tools. One of them is called iridescent surface and the other is called specular one. Moreover the iridescent surfaces are classified into glossy, ordinary, and white. The sections of turned surfaces have a periodic array of tri-angle which is made with feed of lathe and configurations of tools. It is made to examine the relation between the maximum heights of uneveness on the slopes of the triangular grooves (Umax) and the kind of turned surf aces.Some sumples are turned and the pitches and heights (Rmax) of the tri-angular grooves on them are constant but only Umax of them is changed. The Umax and the distributions of diffracted light intensity are measured with an interference microscope with total magnification 1000 times and an automatic recoding goniophotometer respectively. These samples are classified into each kinds of turned surfaces by 15 judges and the results are discussed with the observation of technique of sensory test.The classified kinds of iridescent surfaces are specular, glossy, ordinary and white according to ascending value of Umax. The psychological boundary between specular and glossy iridescent surfaces is definite comparatively, because only existence of iridescent light is judged mainly. The boundary is defined with the degree of smoothness of the slopes, in this case, it of Umax at a probability of 80% is 0.18μm. When Umax of a sample is smaller than 0.18μm, the sample is judged to be specular. The boundaries between glossy and ordinary, and white iridescent surfaces can not be defined. When the slopes are rougher than 0.40μm (in Umax), it becomes difficult to judge the intensity of iridescent light.

著者

藤本 定正 鮎沢 隆 巣山 博美

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.32, no.377, pp.409-413, 1966-06-05 (Released:2010-02-16)

参考文献数

1

被引用文献数

2

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The angular distributions of reflected light from specular and indecent metal-surfaces finished by diamond cutting tools are measured by an automatic recording goniophotometer. The results are compared with the diffraction theory of optical gratings with triangular grooves with two flat faces, and the difference is discussed in connection with irregularity of the side faces of grooves on the surfaces.On both sides of the grooves on iridescent surfaces, there are many fine streaks parallel to the grooves which seem to be caused by unevenness of cutting edges of diamond tools. On other hand, the cutting edges of tools for specular surfaces are flat, and the distribution curves of reflected light correspond to the results calculated with diffraction theory fairly well.

著者

藤本 定正

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.41, no.491, pp.1117-1121, 1975-12-05 (Released:2009-06-30)

参考文献数

6

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The iridescent unevenness of a precisely turned surface is investigated by a ray-tracing procedure with reference to the pitch unevenness of turned grooves. The surface is illuminated at an oblique angle with a linear light source which is crossed at right angles to the cylindrical axis of the surface, and the image of the light source focussed by the surface is observed in the direction of diffraction. The image is smooth parabolic when no pitch unevenness is present on the surface. The image calculated on the assumption of sinusoidal pitch unevenness arises disturbance of the image corresponding to the change of pitch. When the surface is illuminated with a white light source, this disturbance turns into iridescent unevenness. A surface having sinusoidal unevenness of pitch is worked by a lathe provided with a periodically variable feed device connected to the tool slide, and the theoretical result is confirmed. The pitch unevenness tolerable in the existence of iridescent unevenness differs depending to the intensity of iridescence on the surface.