Development of a low f-number micro-lens and microinjection mold master using micro-stereolithography technology

In Hwan Lee, Dong Woo Cho, Dong Sung Kim, Tai Hun Kwon, Kijang Oh, Seung Han Yang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

It is known that a lens, which has very low f-number, can relatively be easily fabricated using a higher order kinoform. In this paper, a higher-order kinoform micro-lens was developed using the micro-stereolithography technology. The solidification width varies with the scanning speed and power of the laser beam in microstereolithography. Since it is difficult to change the laser power during the process, scanning speed is the only parameter to control the solidification width. Experiments were thus conducted to find the relation between the solidification width and the scanning speed for a single laser irradiation with the laser power fixed. The focal length and the F/# of the developed lens were 5mm and 2.5, respectively. The developed lens has 64 kinoform order and 4 phase levels. A microstructure for the manufacturing of mold core for micro-injection molding of the developed micro-lens was also fabricated using the micro-stereolithography technology. It can thus be expected that the replica of this lens can be manufactured easily.

Original languageEnglish
Title of host publication31st North American Manufacturing Research Conference 2003 - Transactions of the North American Manufacturing Research Institution of SME
Pages355-360
Number of pages6
StatePublished - 2003
Event31st North American Manufacturing Research Conference, NAMRC 31 - Hamilton, ON, Canada
Duration: 20 May 200323 May 2003

Publication series

NameTransactions of the North American Manufacturing Research Institution of SME
Volume31
ISSN (Print)1047-3025

Conference

Conference31st North American Manufacturing Research Conference, NAMRC 31
Country/TerritoryCanada
CityHamilton, ON
Period20/05/0323/05/03

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