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maging UV lasers
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3.5.7 Imaging UV lasers Integral Reimaging UV Image Converters The UV image converters are fluorescent plates that convert UV radiation that is poorly imaged by silicon cameras into visible light that is then imaged onto the CCD of the camera. These fluorescent plates are specially designed for UV conversion and have a high light output, wide linear dynamic range and high damage threshold. There are 3 versions available: 1. The 4X UV image converter for large beams converts to visible and then images onto the CCD while reducing the beam size 4X. 2. The 1:1 UV image converter converts to visible and images the beam onto the CCD without changing the size. 3. The 4X expander with UV converter converts to visible and images a beam enlarged 4X onto the CCD. All of the above imagers allow a beam splitter to be mounted at 45 deg angle in front of the imager so as to allow imaging of higher power/energy beams. Cross section of 4X reducing UV image Converter Fluorescent plate Imaging optics Shown here is a profile of a 355nm UV laser. The beam is converted to a visible wavelength, reduced in size and imaged by the beam profiling camera 4X beam reducing UV Image Converter as mounted on camera (SPZ17024) 1X UV Image Converter with Optional Beam Splitter (SPZ17023 + SPZ17015) 4X beam expander with UV converter (SPZ17019+SPZ17022) 4X UV Image Reducing Converter 4X Beam Expander with UV converter Beam Reduction 4X reduction ±2% with included correction factor 50µm x 50µm 193 to 360nm ~1µJ/cm2 with blank filter ~30mJ/cm2 at 193nm, ~15mJ/cm2 at 248nm with included filter 20 times above values with optional beam splitter Ø30mm but effective beam size is limited to 4X CCD dimensions 100W/cm2 or 2J/cm2 with beam splitter Ø50mm dia x 185mm length 1:1 imaging ±2% with included correction factor 35µm x 35µm 4X expansion ±2% with included correction factor 15µm x 15µm ~15mJ/cm2 at 193nm, ~20mJ/cm2 at 248nm with included filter, 20 times greater with optional beam splitter Ø18mm but effective beam size is limited to CCD dimensions ~30mJ/cm2 at 193nm, ~15mJ/cm2 at 248nm 20 times above values with optional beam splitter 1/4 the size of the CCD dimensions Resolution Spectral range Minimum signal Saturation intensity Effective Aperture Damage threshold Dimensions Ordering Information Item Description 1X UV image converter Screw on imaging telescope that converts UV image to visible and images same size on CCD. For beam intensities from 50µJ/cm2 to 15mJ/cm2. Fits 4.5mm recess and CS mount cameras. Beam splitter for above 45 degree wedged beam splitter to reduce intensities on image converter by ~20X. For beam intensities of up to 300mJ/cm2 at 193nm. 4X reducing UV image Screw on imaging telescope that converts UV image to visible reduces the size 4X and images on CCD. For beam converter intensities from 1µJ/cm2 to 15mJ/cm2. Beam splitter for above 45 degree wedged beam splitter to reduce intensities by ~20X. For beam intensities of up to 300mJ/cm2 at 193nm. UV converter assembly Screw on assembly which has UV plate to convert 193 - 360nm radiation to visible. The plate is at the object plane of for 4X beam expander the 4X expander (P/N SPZ17022) and produces a 4X enlarged image on the CCD. Requires separate purchase of 4X reimaging beam expander SPZ17022 20mm diameter UV Ø20mm diameter UV image conversion plate only. For customers that have own imaging system. Converts UV imaging plate image to visible. For beam intensities 50μJ/cm2 to 10mJ/cm². 30mm diameter UV Ø30mm diameter UV image conversion plate only. For customers that have own imaging system. Converts UV imaging plate image to visible. For beam intensities 50μJ/cm2 to 10mJ/cm². 50mm X 50mm UV 50X50mm diameter UV image conversion plate only. For customers that have own imaging system. Converts UV imaging plate image to visible. For beam intensities 1mJ/cm2 to 20mJ/cm2. Not suitable for 193nm. 100mm X 100mm UV 100X100mm diameter UV image conversion plate only. For customers that have own imaging system. Converts UV imaging plate image to visible. For beam intensities 1mJ/cm2 to 20mJ/cm2. Not suitable for 193nm. For latest updates please visit our website: www.ophiropt.com/photonics

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