Salvo Technologies shear-plate collimation testers are lateral-shearing interferometers that can be used to examine and adjust the collimation of laser light. The testers can also be used to measure wave-front curvature and quantify divergence/convergence magnitude.
Usable in the 350-2500nm wavelength range, each collimation tester consists of a wedged, high-quality optical flat housed in a heavy-duty anodized aluminum frame. Testers are available with apertures ranging from 10 to 200 millimeters in diameter.
Aperture Sizes Available: 10mm, 20mm, 50mm, 75mm, 100mm, 125mm, 150mm, 200mm, 250mm
Salvo collimation testers produce instantaneous results. To examine an optical wave-front in a collimating system, simply place a tester at ~ 45° incident to an expanded beam so that the face of the collimation tester is illuminated. The beam is reflected onto a screen placed at a right angle to the reflected beam. Two overlapping circular images bisected by the shadow of the collimation tester’s reference wire will appear on the screen. Fringes (parallel patterns of light and dark areas) will be seen in the overlap region of the two images. To properly collimate the beam, adjust the collimating system until the fringe pattern is parallel to the shadow of the tester’s reference wire.