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3. 发明授权

US5239354A Method and apparatus for the positive identification of a natural pearl and for measuring the thickness of the nacre coating of cultured pearls 失效
标题翻译：用于阳性鉴定天然珍珠并测量培养珍珠珍珠层涂层厚度的方法和装置
公开(公告)号：US5239354A
公开(公告)日：1993-08-24
申请号：US941175
申请日：1992-09-04
申请人： Kenneth M. Russell
发明人： Kenneth M. Russell
IPC分类号： G01N21/21 , G01N21/87 , G02B25/02 , G02B27/02
CPC分类号： G02B25/02 , G01N21/87 , G01N33/381 , G02B27/02 , G01N21/21 , G01N2201/064
摘要： An apparatus comprising a light source, a lens system, a reticle illuminated by the light source, a housing having a substantially dark viewing chamber and a pearl holder for holding the cultured pearl in the substantially dark viewing chamber, and a reticle device for providing a reticle image observable through the lens system. The substantially dark viewing chamber is optically connected to the light source so as to allow light from the light source to traverse an aperture in the pearl holder to illuminate the pearl. The substantially dark viewing chamber is also optically connected to the lens system. In order to provide maximum contrast between light and darkness in the substantially dark viewing chamber, the housing is arranged to prevent entry of extraneous light into the substantially dark viewing chamber. A preferred method according to the present invention includes the following steps. A pearl is placed in the substantially dark viewing chamber. The pearl is illuminated by irradiating a relatively small portion of a side of the pearl with light from the light source, so that luminescence is stimulated throughout the pearl only when the pearl is a natural pearl, and so that the thickness of the nacre coating is observable through the lens system when the pearl is a cultured pearl. The thickness of the nacre coating of the illuminated pearl is measured by comparison with the reticle image observed through the lens system.
摘要翻译：一种装置，包括光源，透镜系统，由光源照射的掩模版，具有基本上暗的观察室的壳体和用于将培养的珍珠保持在基本上暗的观察室中的珍珠架，以及用于提供透镜系统可以观察到掩模版图像。基本上暗的观察室光学地连接到光源，以便允许来自光源的光穿过珍珠保持器中的孔以照亮珍珠。基本上暗的观察室也光学连接到透镜系统。为了在基本上暗的观察室中提供明暗之间的最大对比度，壳体被布置成防止外来光进入基本上暗的观察室。根据本发明的优选方法包括以下步骤。将珍珠放置在基本上暗的观察室中。通过用来自光源的光照射珍珠的相对较少的一侧来照亮珍珠，使得只有当珍珠是天然珍珠时才能在整个珍珠上刺激发光，并且使得珍珠层的厚度为当珍珠是养殖珍珠时，通过透镜系统观察到。通过与通过透镜系统观察到的掩模版图像进行比较来测量照明珍珠的珍珠层涂层的厚度。

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