A grinding process that uses loose abrasives for the beveling of lenses is presented. Determination of the parameters of grinding tools with loose abrasives for beveling applications with various optical elements is discussed. The process of grinding with loose abrasives for a lapping operation is analyzed by examination of the influence of optical glass material parameters on material removal and surface roughness for lens manufacturing conditions. The model established for this analysis uses the concept of lateral fracture, which is based on removal of optical glass material by rolling abrasive particles. The particles remove material by lateral cracking. The abrasive mineral Barton Garnet was used in the lapping experiments. Under specific large-diameter lens manufacturing conditions, lapping time values at the conventional removal depth have been obtained for various optical glasses.
The effect of Coddington factors on aberration functions has been analysed using thin lens approximation. Minimizing spherical aberrations of singlet lenses using Coddington factors in lens design depending on lens manufacturing is discussed. Notation of lens test plate pairs used in lens manufacturing is also presented in terms of Coddington shape factors.
This study deals with lapping process with loose abrasives in large diameter lens manufacturing, Loose abrasive lapping, is a three-body abrasive process in which a fixed load is applied to a plate that presses a slurry consisting of a coolant and abrasive particles onto the optical surface being manufactured. This process is analyzed by examination of the influence of optical glass material parameters on material removal and surface roughness for lens manufacturing conditions. The model established for this analysis uses the concept of lateral fracture, which is based on removal of optical glass material by rolling abrasive particles. The particles remove glass material by lateral cracking. The concept of lateral fracture by rolling abrasive particles is verified as the lapping model, which was found to give a good description of the experimental results. Removal rates and lapping time values at the conventional removal depth are found and which will allow the automation of lapping process for lens manufacturing. The abrasive mineral Barton Garnet was used in the lapping experiments.
This study presents the athermalization of a forward looking infrared system which is one of the task of a optomechanical engineer. Three-dimensional modeling and optical design of a forward looking infrared system are done. Thermal and structural analyses are performed by using the finite element method. Initial conditions and obtained results are verified by a laboratory study. The system parameters are optimized for ensuring the system to perform at different environmental temperatures by determining temperature distributions, expansions and contractions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.