Ophir-Spiricon, manufacturer of laser measurement instruments, has rolled out a new C-mount holder, a series of neutral density attenuators, and a UV ND Filter system to attenuate the UV laser beams.
The laser beams are required to be at an optimal intensity for Pyroelectric or CCD cameras. The filters cover Nd:YAG, Helium Cadmium, and Excimer harmonic wavelengths and function on lasers between 190 nm to 380 nm.
The UV ND Filters incorporate a C-mount holder for utilization with the Pyroelectric and CCD cameras of Ophir-Spiricon. Three filter holders are offered with two filters present in every holder. The filter holder is attached to the filter slot. When the filter is aligned with the laser beam, a click sound is felt. The six filters offer an attenuation range between 0.3 and 6.0 optical densities (OD). The filters incorporate 4.0, 3.0, 2.0, 1.0, 0.7, and 0.3 OD. Two filters can be utilized at a same time for attenuating in 0.4 or 0.3 OD steps.
The filters offer a 20 mm aperture that does not vignette any of the camera models. It provides a damage threshold of 20 mJ/cm² for nanosecond lasers and 100 W/cm² for CW lasers. For attenuating the high-power UV lasers, Ophir-Spiricon’s LBS-300 Beam Sampler has a set of UV ND Filters. The beam sampler also measures the power levels ranging from 10 mW to 400 W.