Optical Design and Engineering

Theoretical and experimental investigation of design for multioptical-axis freeform progressive addition lenses

[+] Author Affiliations
HuaZhong Xiang

University of Shanghai for Science and Technology, School of Medical Instrument and Food Engineering, 516 Jun Gong Road, Shanghai 200093, China

JiaBi Chen

University of Shanghai for Science and Technology, School of Medical Instrument and Food Engineering, 516 Jun Gong Road, Shanghai 200093, China

University of Shanghai for Science and Technology, School of Optical-Electrical and Computer Engineering, 516 Jun Gong Road, Shanghai 200093, China

TianFen Zhu, YeFei Wei, DongXiang Fu

University of Shanghai for Science and Technology, School of Optical-Electrical and Computer Engineering, 516 Jun Gong Road, Shanghai 200093, China

Opt. Eng. 54(11), 115110 (Nov 23, 2015). doi:10.1117/1.OE.54.11.115110
History: Received August 5, 2015; Accepted October 26, 2015
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Abstract.  A freeform progressive addition lens (PAL) provides a good solution to correct presbyopia and prevent juvenile myopia by distributing pupils’ optical powers of distance zone, near zone, and intermediate zone and is more widely adopted in the present optometric study. However, there is still a lack of a single-optical-axis system for the design of a PAL. This paper focuses on the research for an approach for designing a freeform PAL. A multioptical-axis system based on real viewing conditions using the eyes is employed for the representation of the freeform surface. We filled small pupils in the intermediate zone as a progressive corridor and the distance- and near-vision portions were defined as the standard spherical surfaces delimited by quadratic curves. Three freeform PALs with a spherical surface as the front side and a freeform surface as the backside were designed. We demonstrate the fabrication and measurement technologies for the PAL surface using computer numerical control machine tools from Schneider Smart and a Visionix VM-2000 Lens Power Mapper. Surface power and astigmatic values were obtained. Preliminary results showed that the approach for the design and fabrication is helpful to advance the design procedure optimization and mass production of PALs in optometry.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Topics

Lenses ; Eye

Citation

HuaZhong Xiang ; JiaBi Chen ; TianFen Zhu ; YeFei Wei and DongXiang Fu
"Theoretical and experimental investigation of design for multioptical-axis freeform progressive addition lenses", Opt. Eng. 54(11), 115110 (Nov 23, 2015). ; http://dx.doi.org/10.1117/1.OE.54.11.115110


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