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Proceedings Paper

Lapping with loose abrasives in lens manufacturing
Author(s): Omer Faruk Farsakoglu; Hikmet Kocabas; Mutlu Bayar; D. Mehmet Zengin
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Paper Abstract

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.

Paper Details

Date Published: 24 October 2000
PDF: 10 pages
Proc. SPIE 4093, Current Developments in Lens Design and Optical Systems Engineering, (24 October 2000); doi: 10.1117/12.405238
Show Author Affiliations
Omer Faruk Farsakoglu, Turkish Land Forces Command (Turkey)
Hikmet Kocabas, Istanbul Technical Univ. (Turkey)
Mutlu Bayar, ASELSAN Inc. (Turkey)
D. Mehmet Zengin, Ankara Univ. (Turkey)

Published in SPIE Proceedings Vol. 4093:
Current Developments in Lens Design and Optical Systems Engineering
Robert E. Fischer; Robert E. Fischer; R. Barry Johnson; Warren J. Smith; Warren J. Smith; William H. Swantner, Editor(s)

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