公开(公告)号：US3628872A

公开(公告)日：1971-12-21

申请号：US3628872D

申请日：1969-11-06

Applicant: BAXTER LABORATORIES INC

Inventor： MIRANDA VICTOR EDUARDO VASQUEZ

IPC: G01N21/25 ,  G01N21/06

CPC classification number: G01N21/255 ,  G01N21/251

Abstract: An improved method and apparatus are provided by which a selected radiation is passed through a test body and is subsequently measured, so as to determine the amount of the radiation absorbed by the body, and which involves the redirection of the radiation by retroreflective means through the test body directly back along its original path, prior to its detection by an appropriate radiation detector. In this way refraction effects due to flaws in the test body, which normally would direct random portions of the radiation away from the detector are cancelled, and the entire radiant beam is incident on the radiation detector despite such flaws.

公开(公告)号：US3594087A

公开(公告)日：1971-07-20

申请号：US3594087D

申请日：1969-11-06

Applicant: BAXTER LABORATORIES INC

Inventor： MIRANDA VICTOR EDUARDO VASQUEZ

IPC: G01N21/59 ,  G01N21/30

CPC classification number: G01N21/5907

Abstract: An improved optical densitometer is provided for measuring the varying optical densities of a photographic film, or equivalent media, along the length of the media, and which includes retroreflective means for compensating for irregularities in the surface of the media which would otherwise affect the precision of the optical density readings.