公开(公告)号：US20240035887A1

公开(公告)日：2024-02-01

申请号：US18358259

申请日：2023-07-25

Applicant: VIAVI SOLUTIONS INC.

Inventor： Eberhard Lothar LOECKLIN

IPC: G01J3/18

CPC classification number: G01J3/18 ,  G01J2003/2879

Abstract: A monochromator apparatus for an optical spectrum analyzer (OSA) may include a diffraction grating and a sensor. For calibration of the monochromator, an optical signal may be received and a 0th order diffracted signal and an angle of the 0th order diffracted signal may be detected, where the 0th order diffracted signal is obtained by diffracting the optical signal on the diffraction grating. The angle of the 0th order diffracted signal may be set as a reference angle and a next order diffracted signal and an angle of the next order diffracted signal detected. A wavelength of the next order diffracted signal may be determined based on the reference angle and the other angle of the next order diffracted signal using a look-up table or a grating equation-based computation. The calibration may be performed for each sweep of the OSA, at the beginning of a measurement, periodically, or on-demand.

公开(公告)号：US20200217691A1

公开(公告)日：2020-07-09

申请号：US16243862

申请日：2019-01-09

Applicant: VIAVI SOLUTIONS INC.

Inventor： Eberhard Lothar LOECKLIN

IPC: G01D5/347

Abstract: A rotation angle encoder apparatus is disclosed. The rotation angle encoder apparatus may comprise a plurality of light sources, a plurality of light detectors, and a plurality of pinions rotatable about a shaft. Each of the pinions may comprises a plurality of teeth and a plurality of gaps. The rotation angle encoder apparatus may comprise a plurality of stacked configurations such that, when the shaft is rotated, transmissivity may be measured to determine or calculate at least one measurement, such as an angle of rotation, position, movement, distance, or other discernable measurement. The rotation angle to encoder apparatus with a plurality pinions and associated measurable transmissivities may enable an optical spectrum analyzer to increase wavelength accuracy and improve resolution in optical measurements.

公开(公告)号：US20210372827A1

公开(公告)日：2021-12-02

申请号：US17401113

申请日：2021-08-12

Applicant: VIAVI SOLUTIONS INC.

Inventor： Eberhard Lothar LOECKLIN

IPC: G01D5/347

Abstract: A rotation angle encoder apparatus is disclosed. The rotation angle encoder apparatus may comprise a plurality of light sources, a plurality of light detectors, and a plurality of pinions rotatable about a shaft. Each of the pinions may comprises a plurality of teeth and a plurality of gaps. The rotation angle encoder apparatus may comprise a plurality of stacked configurations such that, when the shaft is rotated, transmissivity may be measured to determine or calculate at least one measurement, such as an angle of rotation, position, movement, distance, or other discernable measurement. The rotation angle encoder apparatus with a plurality pinions and associated measurable transmissivities may enable an optical spectrum analyzer to increase wavelength accuracy and improve resolution in optical measurements.