LTCLHP series are high-performance telecentric illuminators specifically designed to back illuminate objects imaged by telecentric lenses. This high performance series provides: Excellent illumination stability featuring no light flickering thanks to very high current stability over time even at low currents. Precise light intensity tuning thanks to the leadscrew multi-turn trimmer positioned in the back. Easy LED source replacement and alignment for all the LED colors offered by Opto Engineering LTCLHP telecentric illuminators offer higher edge contrast when compared to diffused back light illuminators and therefore higher measurement accuracy. This type of illumination is especially recommended for high accuracy measurement of round or cylindrical parts where diffusive back lighting would offer poor performances because of the diffuse reflections coming from the edges of objects under inspection.