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专利权人:
株式会社ニデック
发明人:
小田 健史
申请号:
JP2008094359
公开号:
JP5079575B2
申请日:
2008.03.31
申请国别(地区):
JP
年份:
2012
代理人:
摘要:
An optotype presenting apparatus capable of presenting an optotype having a high degree of flexibility to an examinees eye while a production cost of the apparatus is curbed comprises a main body comprising an optotype forming unit comprising first and second displays displaying optotypes, and a beam combiner combining optical paths of the displays, the optotype forming unit adjusting, if optotype light bundles have polarizing axes, the axes, and providing, if optotype light bundles have no polarizing axis, polarizing axes to the bundles, whereby the bundles form optotypes having the perpendicular polarizing axes, and a projection optical system for projecting the light bundles onto the eye at a test distance, an optotype selecting unit, and a display control unit controlling the displays to display binocular-vision-test optotypes if they are selected, and controlling one of the displays to display a visual-acuity-test optotype if it is selected.
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中国工程科技知识中心
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