Abstract: Apparatus and associated methods relate to a photoelectric sensor system having a transmitter and a receiver, and at least one aperture module configured to modify a nominal field of view (FOV) of the transmitter and/or receiver, such that an overlap between the transmitter and receiver FOVs is controlled. In an illustrative example, the aperture module may be a plate having respective receiver and transmitter apertures. The transmitter and/or receiver apertures may be aligned or slightly offset from respective transmitter and receiver optical axes. The transmitter and/or receiver apertures may have a specific size/shape/position that produces a custom predetermined FOV overlap. At least one registration/alignment pin may extend through the aperture plate, a baffle, and a lens module to control orientation. The photoelectric sensor system may advantageously (1) be more resistant to the “white card effect,” (2) increase maximum sensor range, and (3) control the shape/size/overlap of the FOVs.

Abstract: Apparatus and associated methods relate to a photoelectric sensor system having a transmitter and a receiver, and at least one aperture module configured to modify a nominal field of view (FOV) of the transmitter and/or receiver, such that an overlap between the transmitter and receiver FOVs is controlled. In an illustrative example, the aperture module may be a plate having respective receiver and transmitter apertures. The transmitter and/or receiver apertures may be aligned or slightly offset from respective transmitter and receiver optical axes. The transmitter and/or receiver apertures may have a specific size/shape/position that produces a custom predetermined FOV overlap. At least one registration/alignment pin may extend through the aperture plate, a baffle, and a lens module to control orientation. The photoelectric sensor system may advantageously (1) be more resistant to the “white card effect,” (2) increase maximum sensor range, and (3) control the shape/size/overlap of the FOVs.

Abstract: A computing system includes an interferometer and a processor. The interferometer is configured to generate at least two phase shifted images of an optical fiber specimen. The processor is configured to acquire the at least two phase shifted images from the interferometer, generate a first intermediate data set based on the at least two acquired phase shifted images and perform two-dimensional defect detection on the first intermediate data set.

Abstract: An improved fiber optic tap monitor has characteristics that are flatter over the wavelength range of interest. The polarization dependence of the characteristics of the tap monitor is reduced, and the package for the tap monitor is smaller. The tap monitor reduces the amount of light reflected back to the source. The tap monitor is also assembled in a manner to improve temperature stability, so that its characteristics over a range of temperatures are more nearly constant.

Abstract: An improved fiber optic tap monitor has characteristics that are flatter over the wavelength range of interest. The polarization dependence of the characteristics of the tap monitor is reduced, and the package for the tap monitor is smaller. The tap monitor reduces the amount of light reflected back to the source. The tap monitor is also assembled in a manner to improve temperature stability, so that its characteristics over a range of temperatures are more nearly constant.