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keywords: Ofil Solar Blind product UV systems EPRI-USA DayCor® corona Visulalize Ultra Violet Signals Inspection Apparatuses


Ofil's products incoropoate proprietary technologies of:

  • Solar Blind
  • Filtering

SBUV: Solar Blind UV Technology

Ofil's inspection equipment deploy their ability to visualize ultra violet signals to detect corona and arcing emitted on high voltage equipment.

Categorized as non destructive remote sensing testing equipment, Ofil's imagers utilize the fact that ultra violet between 240-280nm is being absorbed by the Ozone so that signals detected on earth in this spectral range originate on earth.

Processes involved with corona phenomena emit ultra violet light. To detect these emissions in daylight special UV cameras were developed with blocking and transmitting (filtering) capabilities. Ofil's cameras are called solar blind bi-spectral UV-Visible cameras since they incorporate both filtering and transmitting qualities.

While the conventional available UV sensors and filters are blinded by normal daylight and cannot provide the required levels of sunlight blocking, Ofil's solar blind filters, based on the company's intellectual property (IP), enable absolute detection of weak UV signals in full daylight with high signal-to-background ratio and only negligible background noise.

Bi-spectral imaging technology

Ofil developed Solar Blind Visible Bi-spectral imaging capabilities and turned them into viewing methods and apparatuses for locating and visualizing UV events.

UV inspection technology is being used for predictive maintenance of high voltage equipment together with IR-thermography and ultrasonic devices. The value added by UV inspection is reflected in its ability to pinpoint corona and arcing, denote failure location, assist predict unavoidable crisis, display both the emitting objects and the emitted radiation, and assess severity of the case under inspection.

solar blind spectral range
The white line shows solar radiation reaching the earth surface. The blue line shows filter transmission
visible only
This image shows a picture using the visible channel only
UV channel only
This image shows a picture of UV channel only
combined image
This image shows a picture of UV channel and Visible fused into a solar-blind combined image. All images were taken with Ofil's DayCor Cameras