NEW MATERIALS FOR PRECISION OPTICS.

Yogesh Mehrotra, Dinesh Kumar Agrawal, Vladimir S. Stubican

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A novel family of germania-modified cordierite ceramics has been developed for the fabrication of precision optical components. Compositions in this family possess zero average coefficient of thermal expansion (CTE) over selected temperature regions. The zero CTE can be tailored to a desired temperature range of operation by varying the relative proportions of GeO//2 and SiO//2 in the modified cordierite structure. Thermal diffusivity of these ceramics is more than twice that of the ULE glass, a current material for precision mirror substrates. Germanium-cordierites possess high specific stiffness and low thermal-moment/rigidity ratio. Controlable fine-grained structure enables good polishability and offers the potential for an optical quality surface. These thermal and mechanical properties make Ge-cordierites an excellent family of materials for optical and structural applications. The theoretical basis for germania substitution for silica in the pure cordierite structure has been examined.

Original languageEnglish (US)
Pages (from-to)513-518
Number of pages6
JournalOptical Engineering
Volume25
Issue number4
StatePublished - Apr 1 1986

Fingerprint

cordierite
Germanium
Optics
optics
Thermal expansion
germanium
Thermal diffusivity
thermal expansion
Rigidity
Surface properties
ceramics
Mirrors
Substitution reactions
Thermodynamic properties
Silica
Stiffness
Fabrication
Glass
coefficients
Mechanical properties

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)

Cite this

Mehrotra, Y., Agrawal, D. K., & Stubican, V. S. (1986). NEW MATERIALS FOR PRECISION OPTICS. Optical Engineering, 25(4), 513-518.
Mehrotra, Yogesh ; Agrawal, Dinesh Kumar ; Stubican, Vladimir S. / NEW MATERIALS FOR PRECISION OPTICS. In: Optical Engineering. 1986 ; Vol. 25, No. 4. pp. 513-518.
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Mehrotra, Y, Agrawal, DK & Stubican, VS 1986, 'NEW MATERIALS FOR PRECISION OPTICS.', Optical Engineering, vol. 25, no. 4, pp. 513-518.

NEW MATERIALS FOR PRECISION OPTICS. / Mehrotra, Yogesh; Agrawal, Dinesh Kumar; Stubican, Vladimir S.

In: Optical Engineering, Vol. 25, No. 4, 01.04.1986, p. 513-518.

Research output: Contribution to journalArticle

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Mehrotra Y, Agrawal DK, Stubican VS. NEW MATERIALS FOR PRECISION OPTICS. Optical Engineering. 1986 Apr 1;25(4):513-518.