Precision Molding Of Aspherical Plastic Lens For Cam-Corder And Projection Tv

Masayuki Muranaka; Masao Takagi; Terunori Maruyama

doi:10.1117/12.944470

13 July 1988 Precision Molding Of Aspherical Plastic Lens For Cam-Corder And Projection Tv

Masayuki Muranaka, Masao Takagi, Terunori Maruyama

Proceedings Volume 0896, Replication and Molding of Optical Components; (1988) https://doi.org/10.1117/12.944470
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

New molding processes have been successfully developed for precise aspherical lenses of cam-corder or projection TV. They are founded on our idea that precise aspherical lens can be molded by securing the molding deformation axial and constant in every shot. This paper presents a) computer simulation of thermal process and molding deformation, b) factors and process to secure the molding deformation constant i.e. repeatability of molded aspherical surface figure, c) molding dies and injection machine to realize temperature homogeneity of molding lens and stability of injected weight, and d) pre-correction of surface figure on optically polished insert to compensate surface deformation in the molding process. Additionally applications of the aspherical plastic lens manufactured industrially with new process are also provided.

Citation Download Citation

Masayuki Muranaka, Masao Takagi, and Terunori Maruyama "Precision Molding Of Aspherical Plastic Lens For Cam-Corder And Projection Tv", Proc. SPIE 0896, Replication and Molding of Optical Components, (13 July 1988); https://doi.org/10.1117/12.944470

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