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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 11 — Apr. 10, 2014
  • pp: 2523–2531

Analysis of optical properties in injection-molded and compression-molded optical lenses

Chung Yen Wang and Pei Jen Wang  »View Author Affiliations

Applied Optics, Vol. 53, Issue 11, pp. 2523-2531 (2014)

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Numerical mold-flow simulations and experimental measurements for injection-molded lenses have been investigated in form accuracy on a two-cavity mold with various process conditions. First, form profiles of the molded lenses have been measured together with the corresponding simulated mold-temperature distribution and displacement distribution of the lens in the z direction. A flow-through type layout of cooling channels has been devised for balance of mold-temperature distribution in mold cavities with various parametric distances for assessments in uniformity of temperature distribution. Finally, a compression-molding process is proposed for the post-process of birefringence relaxation as well as adequate form accuracy of lenses. In conclusion, optimization of process parameters to achieve good form accuracy in a multicavity mold with symmetric geometry but nonuniform cooling conditions is difficult. A good design of cooling channels plus optimized process conditions could provide uniform mold-temperature distribution so that molded lenses of good quality would be possible. Then, the profile deviation of lenses could be further compensated by profile geometry corrections. In conclusion, the post-compression-molding process could make birefringence-free plastic lenses with good form accuracy.

© 2014 Optical Society of America

OCIS Codes
(080.0080) Geometric optics : Geometric optics
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.0230) Optical devices : Optical devices

ToC Category:
Optical Design and Fabrication

Original Manuscript: January 13, 2014
Revised Manuscript: March 4, 2014
Manuscript Accepted: March 5, 2014
Published: April 10, 2014

Chung Yen Wang and Pei Jen Wang, "Analysis of optical properties in injection-molded and compression-molded optical lenses," Appl. Opt. 53, 2523-2531 (2014)

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