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Laser Beams Collimation Tester
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This product is a simple, fast yet accurate way of testing Laser Beams for Collimation and is available now from Scientific Products. This fine instrument is a precision testing tool used to check the collimation of laser beams, from the most complex system to a simple lens. It is used with lasers, laser diodes and collimated optical assemblies within the UV-Visible-IR spectral range. The best part is that it is not very expensive. The output beam sizes are from 3 mm to 50 mm for standard models and the larger sizes are by special order. |
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About the LBCT-Tester The LBCT-tester is based on a shearing type interferometer which has high sensitivity and used for many optical testing applications. It consists of a high quality optical glass component made to a specific thickness and with extremely flat surfaces and a slight wedge angle between them. When the LBCT-tester is placed in the path of a plane wave laser beam, rotated to an incident angle of 45 degrees, the reflected surfaces results in two laterally displaced wavefronts, one from each surface. The lateral displacement is also considered as shear, due to the thickness of the material while the interference is dependent on the wedge angle of the optical glass. Interference occurs where the two wavefronts overlap, producing straight fringes. The projected fringes can be viewed with a white screen. Any variations of the straightness of the fringes is an indication of residual aberrations in the optics under test. |
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The
way it works is: simply position
the collimation LBCT-tester in the path of a laser beam, rotate it approximately
45 degrees, to direct the beam perpendicular to the output laser beam, as shown
in the photo layout. Then observe
the interference pattern projected on a white card, screen or CCD camera monitor
setup. When the output fringes are
oriented parallel to the reference line of the LBCT-tester the laser beam is
collimated. That’s all there is to it! If the fringes are not parallel to the reference line you may make any adjustments need to the optical system to reorient the fringes. This adjustment may be made while viewing the fringes on the screen. |
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Thank
you for shopping at Scientific Products We
appreciate your business and look forward to you coming back soon. Northern California, U.S.A. Customer Sales Office |
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