As The Optical Engineering Experts™, our team is recognized for leadership in optical design, engineering, metrology, and manufacturing. This collection of technical papers showcases our contributions to the optical engineering community and reflects our commitment to advancing the field of optics.
The Measurement of Object Distance for Projected Virtual Objects using a Scanning Pentaprism and Digital Alignment Telescope
Written By Kevin Sweeney, David A. Imrie ABSTRACT A standard method for assessing collimation involves sampling a series of sub-apertures across the collimating optic an evaluating the local wavefront slope at each position. In practice, this is done by employing a sliding pentaprism to scan the smaller pupil of an alignment telescope across the collimator pupil. Variation in angle of incidence, recorded as image translation in the telescope, indicates collimation error. We have increased the utility of this technique by automating the scanning motion, image collection, and tracking of the observed centroid at a sub-pixel level. Automating the measurement process ensures accurate and repeatable results by eliminating reliance on operator judgments of image quality and reticle positions. Furthermore, automation advances...
