公开(公告)号：US3703641A

公开(公告)日：1972-11-21

申请号：US3703641D

申请日：1969-08-18

Applicant: NORTH AMERICAN ROCKWELL

Inventor： ROSEN FRED D

IPC: G01N15/02 ,  G01N1/00 ,  G01N21/00

CPC classification number: G01N15/0205

Abstract: This invention causes a particle to pass through an intense lightbeam, thus producing a diffraction pattern that is converted to an output signal corresponding to the particle-size. A plurality of lenses produces a minimal-size lightbeam that is blocked-out for normal states, but is permitted to produce an output signal at the presence of a particle. The optical arrangement also blocks-out lightbeams produced by dust, thus providing a better signal-to-noise ratio indication.

Abstract translation: 本发明使颗粒通过强光束，从而产生转换成对应于颗粒尺寸的输出信号的衍射图案。 多个透镜产生对于正常状态而被阻挡的最小尺寸的光束，但是允许在存在颗粒时产生输出信号。 光学布置还阻挡由灰尘产生的光束，从而提供更好的信噪比指示。

公开(公告)号：US3630619A

公开(公告)日：1971-12-28

申请号：US3630619D

申请日：1970-03-13

Applicant: NORTH AMERICAN ROCKWELL

Inventor： ROSEN FRED D ,  WRINKLE WALTER W

IPC: G01J3/00 ,  G01J3/06 ,  G01J3/32 ,  G01J3/40

CPC classification number: G01J3/32 ,  G01J3/0213 ,  G01J2003/062

Abstract: An apparatus and means are disclosed for producing a compensating filter to be used in a spectrophotometer to compensate for variations in intensity of the various wavelengths in a particular light source and to compensate for the spectral response of the optical components in the spectrophotometer so that when the filter is used therein the filtered spectrum of the light source produces a photodetector output that is substantially constant with wavelength. A method utilizing the filter is disclosed to record the spectrophotometry of the light rays from an object.