公开(公告)号：US09964442B2

公开(公告)日：2018-05-08

申请号：US15056245

申请日：2016-02-29

Applicant: NOVATRANS GROUP SA

Inventor： John F. Roulston ,  Daniel Mandelik

IPC: G01B9/02 ,  G01J3/45 ,  G01J3/10 ,  G01J3/42 ,  G01J3/433

CPC classification number: G01J3/108 ,  G01J3/42 ,  G01J3/433 ,  G01J3/4338 ,  G01J2003/4332 ,  G01N21/3581

Abstract: A terahertz spectrometer includes: a terahertz-wave emitter and a terahertz receiver elements. The terahertz wave generated by means of generating beat frequency corresponding to the difference between two rapidly tunable continuous wave lasers. Having a difference in time between the interrogating signal and the reference signal at the receiver end side, which corresponds to intermediate frequency (IF), not centered around the baseband, i.e. zero Hertz. The offset step size of the intermediate frequency from zero Hertz is linearly correlated to the position of the interrogated object position.

公开(公告)号：US11099069B2

公开(公告)日：2021-08-24

申请号：US16870282

申请日：2020-05-08

Applicant: NOVATRANS GROUP SA

Inventor： John F. Roulston ,  Daniel Mandelik

IPC: G01J3/10 ,  G01J3/433 ,  G01N21/3581 ,  G01J3/42

Abstract: A terahertz spectrometer includes: a terahertz-wave emitter and a terahertz receiver elements. The terahertz wave generated by means of generating beat frequency corresponding to the difference between two rapidly tunable continuous wave lasers. Having a difference in time between the interrogating signal and the reference signal at the receiver end side, which corresponds to intermediate frequency (IF), not centered around the baseband, i.e. zero Hertz. The offset step size of the intermediate frequency from zero Hertz is linearly correlated to the position of the interrogated object position.

公开(公告)号：US10684170B2

公开(公告)日：2020-06-16

申请号：US15967964

申请日：2018-05-01

Applicant: NOVATRANS GROUP SA

Inventor： John F. Roulston ,  Daniel Mandelik

IPC: G01J3/10 ,  G01J3/433 ,  G01N21/3581 ,  G01J3/42

Abstract: A terahertz spectrometer includes: a terahertz-wave emitter and a terahertz receiver elements. The terahertz wave generated by means of generating beat frequency corresponding to the difference between two rapidly tunable continuous wave lasers. Having a difference in time between the interrogating signal and the reference signal at the receiver end side, which corresponds to intermediate frequency (IF), not centered around the baseband, i.e. zero Hertz. The offset step size of the intermediate frequency from zero Hertz is linearly correlated to the position of the interrogated object position.

公开(公告)号：US11408768B2

公开(公告)日：2022-08-09

申请号：US16870158

申请日：2020-05-08

Applicant: NOVATRANS GROUP SA

Inventor： John F. Roulston ,  Daniel Mandelik

IPC: G01J3/10 ,  G01J3/433 ,  G01N21/3581 ,  G01J3/42

Abstract: A terahertz spectrometer includes: a terahertz-wave emitter and a terahertz receiver elements. The terahertz wave generated by means of generating beat frequency corresponding to the difference between two rapidly tunable continuous wave lasers. Having a difference in time between the interrogating signal and the reference signal at the receiver end side, which corresponds to intermediate frequency (IF), not centered around the baseband, i.e. zero Hertz. The offset step size of the intermediate frequency from zero Hertz is linearly correlated to the position of the interrogated object position.

公开(公告)号：US09806491B2

公开(公告)日：2017-10-31

申请号：US14824964

申请日：2015-08-12

Applicant: NOVATRANS GROUP SA

Inventor： John Connolly ,  John F. Roulston ,  Daniel Mandelik

IPC: H01S3/04 ,  H01S3/131 ,  F25B21/02 ,  H01L35/32 ,  G01N21/3586 ,  H01S1/02 ,  H01S5/024

CPC classification number: H01S3/1317 ,  F25B21/02 ,  F25B2321/021 ,  G01N21/3586 ,  H01L35/325 ,  H01S1/02 ,  H01S3/0405 ,  H01S5/02415

Abstract: A thermo-electric cooling (TEC) system is presented for cooling of a device, such a laser for example. The TECT system comprises first and second heat pumping assemblies, and a control unit associated at least with said second heat pumping assembly. Each heat pumping assembly has a heat source from which heat is pumped and a heat drain through which pumped heat is dissipated. The at least first and second heat pumping assemblies are arranged in a cascade relationship having at least one thermal interface between the heat source of the second heat pumping assembly and the heat drain of the first heat pumping assembly, the heat source of the first heat pumping assembly being thermally coupled to the electronic device which is to be cooled by evacuating heat therefrom. The control unit is configured and operable to carry out at least one of the following: (i) operating said second heat pumping assembly to provide a desired temperature condition such that temperature of the heat drain of said first heat pumping assembly is either desirably low or by a certain value lower than temperature of the heat source of said first heat pumping assembly; and (ii) operating said second heat pumping assembly to maintain predetermined temperature of said thermal interface.