ABSTRACT
Objective Based on the principles of laser radiation protection, medical metroiogy and photoelectron technology, an automatic verification device and testing technology to provide verification and performance evaluation for laser protective spectacles and equipments which have the various functions in laser protection have been developed and established. Methods The current system comprises laser source, laser measuring instruments, software of computer detection and control and modules of optics and mechanics used in auxiliary equipment. By use of the verification device and the special test-recording method to be designed and studied by us, the measured data can be automatically acquired, processed, recorded, saved and printed and, furthermore, many parameters on protective performance of the measured laser protective spectacles can be tested and given. Results Laser wavelength of the verification apparatus are 1 064 nm and 532 nm, response range of wavelength is from 0.4 m to 1.1 μm, measuring range of laser energy is from 10-8 J to 0.3 J, measuring range of optical density for laser protective spectacles is from 0.1 to 8.0, stability is 0.21%, measuring uncertainty is 5%(k=2). Conclusion The automatic verification device is steady and reliable. The achieved performance indexes accord with the requirement of national standard on laser protection.
ABSTRACT
Objective To test and evaluate measurement uncertainty and relational performance parameters of the verification device for laser protective spectacles.Methods By using realtime beam-splitting surveillance,several performance parameters,including the measurement repeatability of the verification device,optical density of laser protective spectacles in different laser exposure conditions and its damage threshold,were tested.The measurement modules of the main performance parameters were built up as the experiment & technology platform for performance evaluation of laser protective spectacles and for measurement uncertainty appraisal of verification device.Results Laser wavelengths of the verification device were 1064nm and 532nm,response range of wavelength was from 0.4?m to 1.1?m,measuring range of laser energy was from 10-8 J to 0.3J,measuring range of optical density for laser protective spectacles was from 0.1 to 8.0,measuring repeatability was 0.37%,and measuring uncertainty was 5% (k =2).Conclusion The automatic verification device is steady and reliable.The achieved performance indexes accord with the designed requirement for laser protection.