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- W2063011796 abstract "Recently, in the world some growing-up measurements for Progressive addition lenses and relevant equipments havebeen developed. They are single point measurement, moire deflectometry, Ronchi test techniques. Hartmann test forProgressive addition lenses is proposed in the article. The measurement principle of Hartmann test for ophthalmic lensesand the power compensation of off-axis rays are introduced. The experimental setup used to test lenses is put forward.For experimental test, a spatial filter is used for selecting a clean Gaussian beam; a collimating lens with focal distance f=300 mm is used to produce collimated beam. The Hartmann plate with a square array of holes separated at 2 mm isselected. The selection of laser and CCD camera is critical to the accuracy of experiment and the image processingalgorithm. The spot patterns from CCD are obtained from the experimental tests. The power distribution map for lensescan be obtained by image processing in theory. The results indicate that Hartmann test for Progressive addition lenses isconvenient and feasible; also its structure is simple." @default.
- W2063011796 created "2016-06-24" @default.
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- W2063011796 date "2009-05-11" @default.
- W2063011796 modified "2023-09-23" @default.
- W2063011796 title "Research on Hartmann test for progressive addition lenses" @default.
- W2063011796 doi "https://doi.org/10.1117/12.828655" @default.
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