公开(公告)号：US3850525A

公开(公告)日：1974-11-26

申请号：US37777573

申请日：1973-07-09

Applicant: BECKMAN INSTRUMENTS INC

Inventor： KAYE W

IPC: G01N21/47 ,  G01N21/52 ,  G01J3/44

CPC classification number: G01N21/47

Abstract: In a laser photometer of the type including means for focusing a laser beam onto a sample, means for receiving a cone of light issuing from the sample in an incremental angle Delta theta at a selectable angle theta , means for focusing the cone of light onto the aperture of a field stop, and detector means for measuring the radiant power passing through the aperture in the field stop, there is disclosed apparatus positionable between the field stop and the detector for permitting the making of simultaneous measurements of different characteristics of the radiant power passing through the field stop. The present photometer permits the simultaneous measurement of scattered light at two different angles and the simultaneous measurement of light at two different wavelengths. In the latter case, the present photometer permits the simultaneous measurement of scattered light and fluorescent radiation. Finally, the present photometer may be used to reduce the background level when making light scattering measurements.

Abstract translation: 在包括用于将激光束聚焦到样品上的装置的激光光度计中的装置，用于接收以可选角度θ以增量角度ΔTATA从样品发出的光锥的装置，用于将锥形光聚焦到 现场停止的孔径和用于测量通过场停止器中的孔径的辐射功率的检测器装置，公开了可在场停止器和检测器之间定位的装置，用于允许同时测量辐射功率通过的不同特性 通过野外停止。 本光度计允许同时测量两个不同角度的散射光，并同时测量两个不同波长的光。 在后一种情况下，本光度计允许同时测量散射光和荧光辐射。 最后，当进行光散射测量时，本光度计可用于降低背景水平。

公开(公告)号：US3843268A

公开(公告)日：1974-10-22

申请号：US37689873

申请日：1973-07-05

Applicant: BECKMAN INSTRUMENTS INC

Inventor： KAYE W

IPC: G01N21/03 ,  G01N21/51 ,  G01N1/10

CPC classification number: G01N21/51 ,  G01N21/0303 ,  G01N2201/0642

Abstract: In a laser photometer for measuring radiant power scattered from a sample at a selectable, small forward angle with respect to the direction of an incident beam of radiant power, there is disclosed an improved sample container comprising first and second thick, transparent windows; a spacer between the windows having first and second coaxial, intersecting passageways therein, the beam from the laser entering the first window and the first passageway and the scattered radiant power exiting through the second passageway and the second window; and a black glass disc positioned at the intersection of the passageways, the disc having an aperture therein forming a cell for the sample which is coaxial with the first and second passageways, the laser beam being focused in the aperture, the disc operating to absorb light scattered from the second window thereby reducing background scattering and the usable scattering angle of the photometer.