Determining laser/LED source size with a eye-simulant camera Available to Purchase

We describe an improved eye-simulant camera to determine source size of optical sources, such as LEDs and diode lasers. The determination of the angular subtense α of the source is critical in determining retinal hazards from extended-source lasers and intense light sources. Current methods to determine source size for retinal safety studies vary, but all have the problem that optics distort the result. Most frequently, one employs a laser beam-profiler, which can be used, but the optical influence of cornea and lens are not fully simulated by the beam profiler. Errors are introduced if the aperture or lens focal length is differs much from the human eye. Hence, we demonstrate a monochrome digital camera for this purpose.