Fabrication and testing of high quality small germanium plano-convex lens

Rong Seng Chang, Ter Chin Chern, Chern Sheng Lin, Yun Long Lay

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


In this paper, a new method is designed which is accurate (λ/4, λ=632·8 nm) for finishing the small (less than 2·6 mm diameter and a center thickness of 0·4 mm) and soft germanium plano-convex lens. Special features of this process are as follows: (i) it produces a scratch-free and smooth surface; (ii) a precision blocking jig has been constructed which enables the operators to engage centering work of the plano-convex lenses (i.e. the lenses edge are co-axial with the optical axis); (iii) a modified moiré technique rapidly performs the centering test; and (iv) the simulation model has been developed for evaluating the polishing parameters used in this process.

Original languageEnglish
Pages (from-to)257-272
Number of pages16
JournalOptics and Lasers in Engineering
Issue number5
StatePublished - 1994


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