公开(公告)号：US11193825B2

公开(公告)日：2021-12-07

申请号：US16613717

申请日：2018-05-24

Applicant: The Penn State Research Foundation

Inventor： Adam Rimshaw ,  Christopher Grieco ,  Eric Kennehan ,  John B. Asbury

IPC: G01J3/42 ,  G01J3/02 ,  G01J3/18 ,  G01N21/31 ,  G01R13/02

Abstract: A high-sensitivity nanosecond to millisecond transient absorption spectrometer for measurements of miniscule signals under low excitation intensities includes an excitation source generating a >100 Hz,

公开(公告)号：US20220113190A1

公开(公告)日：2022-04-14

申请号：US17529869

申请日：2021-11-18

Applicant: The Penn State Research Foundation

Inventor： Adam Rimshaw ,  Christopher Grieco ,  Eric Kennehan ,  John B. Asbury

IPC: G01J3/42 ,  G01N21/31 ,  G01R13/02 ,  G01J3/18 ,  G01J3/02

Abstract: A high-sensitivity nanosecond to millisecond transient absorption spectrometer for measurements of miniscule signals under low excitation intensities includes an excitation source generating a >100 Hz,

公开(公告)号：US20210172799A1

公开(公告)日：2021-06-10

申请号：US16613717

申请日：2018-05-24

Applicant: The Penn State Research Foundation

Inventor： Adam Rimshaw ,  Christopher Grieco ,  Eric Kennehan ,  John B. Asbury

IPC: G01J3/42 ,  G01J3/02 ,  G01J3/18 ,  G01N21/31 ,  G01R13/02

Abstract: A high-sensitivity nanosecond to millisecond transient absorption spectrometer for measurements of miniscule signals under low excitation intensities includes an excitation source generating a frequency greater than 100 Hz, pulsewidth less than 5 ns excitation pulse for exciting a light absorbing sample, a probe light source for generating a photon flux probe light beam producing an average irradiance greater than 1 μW m−2 nm−1 for measuring the transient absorption spectrum of the sample before and after excitation by the excitation source, a DC-coupled detector capable of measuring light for enabling synchronous measurement of both the transmission of the probe light beam and the change in transmission of the probe light beam between a signal with the excitation pulse present and a signal in the absence of the excitation pulse, and a digital oscilloscope with a trigger rearm time capable of collecting every trigger event at high frequencies including 1 MHz, for enabling sequential noise subtraction protocols.