The laser protection devices (LPDs) are developed based on Kent Optronics innovative tunable notch filters with the FPGA implemented electronics for fully automated operation.

Data Sheet

Laser Protection

All the laser protection devices (LPDs) are exclusively developed based on Kent Optronics' innovative tunable notch filters with the FPGA implemented electronics for fully automated operation.

KOI offers three series of LPD products:

  • Manually operated LPDs
  • Computer interfaced LPDs
  • Fully automated LPDs

Each series of LPD products further consists of three (3) sub-series, depending on the filter equipped, i.e., switchable-tunable notch filter (S-TNF), binned notch filter (B-NF) and polarizer-free tunable notch filter (NP-TNF).

The manually operated LPDs come with a tunable notch filter and a calibrated power supply. The user simply dials the digit number of the wavelength via the control knob on the power supply to tune the LPD to the user pre-determined wavelength. For those LPDs equipped with either the S-TNF or B-NF, the user also has the option to switch the LPD between the blocking active and non-active states via a toggle switch.

The computer interfaced LPDs come with a tunable notch filter, a power supply, a software disc containing the look-up table for wavelength tuning, and a USB or RS-232 cable to interface to an optional host computer. The filter and the power supply are connected together and interfaced with the host computer via USB or RS-232 interface. The user keys in the digit number of the wavelength through the keyboard to tune the LPD to the user's pre-determined wavelength. Similarly, for those LPDs equipped with either the S-TNF or B-NF, the user can switch the LPD between the blocking active and non-active states via the windows-supported graphic-user-interface (GUI).

The fully automated LPDs come with a tunable notch filter, an optical detection and a discrimination assembly [including a wide field of view (FOV) optical detector head and a spectral analyzer], a controlling electronics package including a power supply, a software package containing the look-up table for wavelength tuning and system operation, and an optional host computer. The filter is connected to the controlling electronics which, together with the optical detection and discrimination assembly, is further interfaced to the host computer via USB or RS-232 interface. The user positions the tunable filter, as well as the detector head facing to the possible incoming laser beam and then inputs the light intensity threshold through the keyboard. The LPD then automatically detects, discriminates, thresholds, and automatically blocks the harmful incoming laser if the laser intensity is above the pre-set threshold. If the LPD is equipped with either an S-TNF or B-NF, the user has the option to switch the LPD between the blocking active and non-active states via the windows-supported graphic-user-interface (GUI). All the actions are completed within 10's to 100's milliseconds. The LPDs provide the customers with a highly efficient means for laser protection with the following main performance specifications:

  • Wide operation spectrum range from the visible to mid-wave IR
  • high optical density (OD) at the notch wavelength
  • >80% out band transmittance (or <1dB insertion loss)
  • 10's to 100's nm notch bandwidth
  • 10's to 100's milliseconds total action time

Customers can choose the filter type, aperture, and operation mode. All products are offered at a competitive price. Contact us for a price quote with your specific application requirements.