公开(公告)号：US3650630A

公开(公告)日：1972-03-21

申请号：US3650630D

申请日：1970-06-12

Applicant: BAIRD ATOMIC INC

Inventor： HABOSIAN KASPAR

IPC: G01J3/28 ,  G01J3/30

CPC classification number: G01J3/28

Abstract: Line spectra and background energy superimposed thereon is alternately positioned ''''on'''' and ''''off'''' a slit. During the ''''off'''' period only background energy is positioned on the slit. Measuring and reference capacitors associated with photomultipliers, integrate the signal in such a manner that long time constant background energy is canceled. Short time constant background energy is canceled by detecting the polarity of the residual charge on the reference capacitor and by integrating, on each measuring capacitor, a signal representing the opposite polarity of the detected charge. In consequence, the residual charge on each of the measuring capacitors is driven to zero.

Abstract translation: 叠加在其上的线谱和背景能量交替地定位在狭缝上“开”和“关”。 在“关闭”期间，只有背景能量位于狭缝上。 与光电倍增管相关联的测量和参考电容器以使得长时间恒定的背景能量被消除的方式集成信号。 通过检测参考电容器上的残余电荷的极性并且通过在每个测量电容器上积分表示检测到的电荷的相反极性的信号来消除短时间常数背景能量。 因此，将每个测量电容器上的剩余电荷驱动为零。

公开(公告)号：US3588252A

公开(公告)日：1971-06-28

申请号：US3588252D

申请日：1969-09-17

Applicant: BAIRD ATOMIC INC

Inventor： HABOSIAN KASPAR

IPC: G01J3/28 ,  G01J3/20 ,  G01J3/30

CPC classification number: G01J3/28

Abstract: OPTICAL SPECTROMETERS CURRENTLY EMPLOY PHOTODETECTING DEVICES TO CHARGE CAPACITOR IN MEASURING THE INTENSITY OF MONITORED LINE SPECTRA. THE RADIANT ENERGY FALLING UPON THE PHOTODETECTORS, IN ADDITION TO THE SPECTRAL LINE OF INTEREST ALSO INCLUDES BACKGROUND ENERGY WHICH IS THE BANDSPECTRA SUPERIMPOSED ON THE LINE SPECTRA. THE BACKGROUND AMOUNTS TO NOISE AND ADVERSELY AFFECTS THE ACCURACY OF THE INSTRUMENT. THIS INVENTION INVOLVES THE ELIMINATION OF THE BACKGROUND NOISE BY OSCILLATING THE LINE SPECTRA ACROSS THE SLIP AND SEQUENTIALLY CHARGING AND DISCHARGING THE MEASURING CAPACI-

TORS ASSOCIATED WITH THE PHOTODETECTORS TO AVERAGE OUT THE BACKGROUND NOISE.