发明名称 Optical apparatus having visual axis detector and determining whether eyeglasses are worn
摘要 An optical apparatus includes a view finder through which a subject is observed, a visual axis detection device for detecting a direction of a visual axis of an observer who is looking into the view finder, and a determination device for determining whether or not the observer is wearing eyeglasses.
申请公布号 US5182443(A) 申请公布日期 1993.01.26
申请号 US19910767665 申请日期 1991.09.30
申请人 CANON KABUSHIKI KAISHA 发明人 SUDA, YASUO;NAGANO, AKIHIKO;KONISHI, KAZUKI
分类号 G02B7/34;G03B13/02 主分类号 G02B7/34
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