Title: Method and apparatus for detecting solid substances contained in liquid

Abstract: Method and apparatus for detecting and measuring solid alien substance(s), which may adversely exist in a liquid contained in a transparent container, are provided. Light is applied to the container as it is rapidly rotated and then suddenly stopped to cause floating or suspending the solid substance(s) in the liquid. The light passed through the liquid or passed through light and also the light reflected from the solid substance(s) are separately captured and their individual intensities are measured by means of photometry. The method and apparatus may be utilized for sorting out the transparent liquid from that contaminated with solid impurity, depending upon the intensity(s) of the captured light or lights.

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Inventors: Takahashi, Toshio (Honjo, JA)
Tagaya, Ryosaku (Isezaka, JA)
Ehara, Toshiyasu (Misato, JA)

Application Number: 518940
Filing Date: 1974-10-29
Publication_date: 1976-03-09
Assignee: Eisai Co., Ltd. (Tokyo, JA)
Primary Class(es): 356/427 356/341
Other Classes:
US Patent Ref:

2635194	Apr, 1953	Kellogg et al.	356/197.
3415997	Dec, 1968	Vinzelberg et al.	356/197.
3591290	Jul, 1971	Zinner et al.	356/102.
3602640	Aug, 1971	Maillet et al.	350/96.
3811567	May, 1974	Tomita et al.	356/197.

Other Refs:
Primary Examiner: Smith, Alfred E.
Assistant Examiner: Punter, Wm. H.
Attorney: Wenderoth, Lind & Ponack