公开(公告)号：US20140226161A1

公开(公告)日：2014-08-14

申请号：US14179148

申请日：2014-02-12

Applicant: Bio-Rad Laboratories, Inc.

Inventor： Jeff Blitstein ,  Keith Kotchou ,  Kevin McDonald

IPC: G01N21/59 ,  G01N21/55

CPC classification number: G01N21/5907 ,  G01N21/55

Abstract: The present invention provides a transmissive density and/or reflective density reference step tablet and methods of using thereof for calibrating a densitometer or the like.

Abstract translation: 本发明提供透射密度和/或反射密度参考步骤片及其用于校准密度计等的方法。