公开(公告)号：GB2315342A

公开(公告)日：1998-01-28

申请号：GB9725039

申请日：1996-05-28

Applicant: BIO RAD LABORATORIES

Inventor： CURBELO RAUL ,  JOHNSON DAVID B

IPC: G02B9/02 ,  G01B9/02 ,  G01J3/28 ,  G01J3/453

Abstract: The invention relates generally to interferometers (5), and more specifically to techniques for stabilizing the alignment in a rapid scan Michelson interferometer (5) used in a Fourier transform spectrometer. Alignment circuitry and calibration system (50, 60, 70, 80) is used for a scanning interferometer. Phase shifts (fig. 4b) are introduced into the alignment servo to maximize overall modulation efficiency.

公开(公告)号：CA2109510A1

公开(公告)日：1992-11-23

申请号：CA2109510

申请日：1992-05-08

Applicant: BIO RAD LABORATORIES

Inventor： JOHNSON DAVID B ,  CURBELO RAUL

IPC: G01B9/02 ,  G01B11/00 ,  G01J3/45 ,  G01J3/453 ,  G05B19/39 ,  G05D3/12

Abstract: A fast and effective way to step a relative position quantity by a reference interval. Each step in relative position includes open-loop and closed-loop control intervals. An actuator (27) capable of changing the relative position and a closed loop servo (17) that acts on the actuator (27) to keep the relative position centered on the nearest of a series of reference values. The servo (17) has locked the relative position to a particular initial reference value. First, the actuator (27) is caused to change the relative position by an amount approximately equal to the reference interval in a manner that the servo (17) cannot track the change, such as by disabling the servo (17). Servo control is then re-established, at which point the servo (17) operates to keep the relative position centered on the nearest reference value.

公开(公告)号：EP0595835A4

公开(公告)日：1995-02-01

申请号：EP92913202

申请日：1992-05-08

Applicant: BIO RAD LABORATORIES

Inventor： CURBELO RAUL ,  JOHNSON DAVID B

IPC: G01B9/02 ,  G01B11/00 ,  G01J3/45 ,  G01J3/453 ,  G05B19/39 ,  G05D3/12 ,  G05B1/06

CPC classification number: G05B19/39 ,  G01J3/4535