Regular Papers

Optical Review

, 14:145

First online:

Fabrication and optical evaluation of aspheric glass lenses for 3 megapixel zoom camera phone module

  • Hye-Jeong KimAffiliated withUltra Precision Optics Team, Korea Photonics Technology Institute (KOPTI)Department of Material Science and Engineering, Chonnam National University
  • , Hyun-Uk KimAffiliated withUltra Precision Optics Team, Korea Photonics Technology Institute (KOPTI)Department of Material Science and Engineering, Chonnam National University
  • , Sang-Suk KimAffiliated withUltra Precision Optics Team, Korea Photonics Technology Institute (KOPTI)Department of Material Science and Engineering, Chonnam National University
  • , Yong-Pil ParkAffiliated withDepartment of Hospital Biomedical Engineering, Dongshin UniversityDepartment of Material Science and Engineering, Chonnam National University
  • , Jeong-Ho KimAffiliated withUltra Precision Optics Team, Korea Photonics Technology Institute (KOPTI)Department of Material Science and Engineering, Chonnam National University Email author 
  • , Du-Hwan ChaAffiliated withDepartment of Material Science and Engineering, Chonnam National University

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Abstract

The purpose of this study is to develop aspheric glass lenses 4mm in diameter by compression molding. The lens is intended for use as an optical design of 3 megapixel and 2.5 magnifications zoom in a camera phone module. Because of the excellent optical performance of glass and aspheric element, which minimize optical aberrations, the adoption of optical designs using of aspheric glass lenses is rapidly increasing with the progress of precision image forming optics. We fabricated the mold using ultra-precision processing of tungsten carbide (WC). The aspheric glass lens was precisely molded and then its characteristics were evaluated. The mechanical and optical properties of the molded lens were investigated and it showed 90–95% transcription ratio and 0:0655λ root-mean-square optical path difference (OPD-rms), which corresponds to a 0.844 Strehl ratio. Based on the optical performance using the Marechal criterion, we supposed that the molded lens is suitable for the optical design. It also means our fabrication process is available.

Key words

aspheric glass lens ultra-precision grinding glass molding press (GMP)