But microscopy is another story. In many applications, such as the aerospace and automotive industries, inspectors must make precise measurements from microscope imaging. Microscopes with conventional optics cannot deliver the level of accuracy needed.

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As manufacturers look to gain greater speed and scale over competitors, the need for efficient, accurate inspection processes will only become more important. Advances like telecentric optics can help you achieve more in less time and give your business an edge over the competition.

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A microscope equipped with a telecentric optical system can streamline the inspection process since you won’t need any extra cameras or equipment to fix the magnification changes.

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Telecentric optics, however, help ensure a high degree of accuracy and repeatability. In addition to eliminating parallax errors, telecentric optics also tend to have a larger depth of field and lower distortion than conventional optics. Because of these benefits, telecentric optics are built into highly reliable devices like the DSX1000 digital microscope.

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Now let’s say you take the same image using telecentric optics. In this case, the tracks remain the same perceived size regardless of whether they are closer to the lens or farther away. Since telecentric lenses reduce or eliminate the magnification changes, the image reveals the precise size of the tracks.

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Conventional optics, on the other hand, are lenses with an angular field of view that exhibit varying magnification for objects at different distances from the lens. Conventional lenses can be either entocentric, where objects further away have lower magnification, or pericentric, where objects further away have higher magnification.

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If you’re trying to measure a large, three-dimensional object with a conventional lens, the measurement results from the top and bottom of the object might read differently. This perspective error—or parallax—can make it challenging to produce accurate, repeatable measurements. Not only can the perceived size of objects change, but objects closer to the lens could block other objects from view.

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Non planar lattices statistics Counting over non planar lattices , Physica A 302, 100 (2001) Combinatorial and topological approach to the 3D Ising model , J.Phys.A 33, 741-761 (2000), with T. Regge. In this work we applied the techniques developed in J. Math. Phys. 37, 2796 (1996) to the case of the 3D cubic lattice which has a genus g=1+N/4, where N is the number of spins. Independently from us, A. Galluccio and M. Loebel developed a similar method providing the first general proof of the exactness of the Pfaffian expansion of the generating function of perfect matchings for non planar lattices (see e.g. Electronic Journal of Combinatorics 6, (1999) and PRL 84, 5294 (2000)). Exact Solution of the Ising Model on Group Lattices of Genus g>1 , J. Math. Phys. 37, 2796 (1996), with T. Regge. Statistical Physics of Disordered Systems Core percolation and onset of complexity in Boolean networks   L Correale, M. Leone, A. Pagnani, M. Weigt, R. Zecchina Phys. Rev. Lett. 018101 (2006) Ferromagnetic ordering in graphs with arbitrary degree distribution  Eur. Phys. J. B 28, 191 (2002), with M. Leone, A. Vazquez, A. Vespignani Exact solutions for diluted spin glasses and optimization problems, , Phys. Rev. Lett. 87 (2001) 127209, with S. Franz, M. Leone, F. Ricci-Tersenghi A ferromagnet with a glass transition, , Europhys. Lett. 55 (2001) 465, with S. Franz, M. Mezard, F. Ricci-Tersenghi, M. Weigt Glassy dynamics near zero temperature , Phys. Rev. E62, R7567 (2000) with F. Ricci-Tersenghi Time scale separation and heterogeneous off-equilibrium dynamics in spin models over random graphs , Phys. Rev. E59, 1299 (1999) with A. Barrat Game theoretical models Statistical physics approach to graphical games: local and global interactions   , A. Ramezanpour, J. Realpe-Gomez, R. Zecchina, European Physical Journal B 81, 327 (2011) Statistical mechanics of budget-constrained auctions   , F. Altarelli, A. Braunstein, J. Realpe-Gomez, R. Zecchina, JSTAT P072002 (2009) Statistical mechanics of asset markets with private information , J.Quant.Finance 1, 203-211 (2001) with J. Berg, M. Marsili, A. Rustichini Statistical Mechanics of systems with heterogeneous agents: Minority Games , Phys. Rev. Lett. 84, 1824 (2000), with D. Challet, M.Marsili Exact solution of a modified El Farol's bar problem: Efficiency and the role of market impact , with M.Marsili and D. Challet, Physica A 280, 522 (2000) Learning to coordinate in non-stationary... , Phys. Rev. Lett., 87, 208701 (2001) with M. Marsili, R. Mulet, F. Ricci-Tersenghi Quantum systems. Quantum dynamics of coupled bosonic wells within the Bose-Hubbard picture , with R. Franzosi and V. Penna, Int. J. Mod. Phys. B 14 (2000) 943-961 Two--Boson Hamiltonian for Shor's Algorithm , with M. Rasetti, E. Tagliati, Phys. Rev. A, 2594 (1997) Generalized fullerene-like lattices, and itinerant interacting electrons, with M.Rasetti , Physica A 199, 539 (1993) Superfluidity of the Bose--Hubbard Model: su(1,1) Linearization Scheme, with L. Amico, M. Rasetti, Physica A 230, 300-312 (1996) Mean-field Studies of Hubbard Hamiltonians Coupled via Interlayer Pair Tunelling,  R. Zecchina, Mod. Phys. Lett. B, 1817 (1993) Review papers Statistical mechanics and combinatorial problems, R. Zecchina, Encyclopedia of Mathematical Physics, eds. J.-P. Francoise, G.L. Naber and Tsou S.T. Oxford: Elsevier, 2006 (ISBN 978-0-1251-2666-3), volume 2. Statistical mechanics methods and phase transitions in optimization problems. Theoretical Computer Science 265, 3 (2001), with O.C. Martin, R. Monasson Lattice statistics over structures of high topological genus , review paper with T. Regge, still to be finished. Return to my home page.

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Telecentric optics are lenses that provide the same magnification regardless of the object's distance or location in the field of view. The impression of spatial depth in the image appears flat, so objects at two different working distances will remain the same perceived size.

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Telecentricillumination

Rebecca holds a bachelor's degree in journalism from Endicott College and writes about trends and technologies in science and industry. She works closely with Evident engineers and scientists to write pieces about the latest remote visual, microscope, ultrasonic, eddy current, and phased array technologies. Follow her work to learn about Evident’s latest for numerous applications, including manufacturing QA/QC, maintenance, mining, and more.

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Now imagine you’re trying to measure a very small critical component using your microscope and you can understand why telecentric optics are so critical to accurate measurements.

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Telecentric optics provide many advantages compared to conventional optics, particularly when it comes to industrial inspections. Despite this, many people remain unsure of what telecentric optics are and what they’re used for.

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Most conventional lenses are entocentric. With entocentric lenses, closer objects will appear larger than those further away. This angular field of view is also the way we see the world around us, and it helps us perceive depth.

Here’s an example to illustrate the difference. Let’s say you take a photo of railroad tracks using a conventional lens. You know that the tracks stay the same distance apart throughout its entire length, but, in the image, the tracks appear to come closer and closer together as they go off into the horizon.