Optics: measuring and testing – Lens or reflective image former testing – For optical transfer function
Patent
1996-08-20
1998-02-17
Pham, Hoa Q.
Optics: measuring and testing
Lens or reflective image former testing
For optical transfer function
356127, G01B 900
Patent
active
057196680
ABSTRACT:
A lens meter in which light from a measurement light source is passed though a lens to be measured into a photoelectric conversion element so as to find optical characteristics of the lens to be measured based on photoelectric conversion signals from the photoelectric conversion element. The measurement light source is capable of emitting at least two rays of light having different wavelengths. The lens meter includes computing device for calculating optical characteristics of the lens to be measured based on photoelectric conversion signals from the photoelectric conversion element in response to the two rays of light having different wavelengths. This configuration ensures an accurate measurement of optical characteristics of the lens to be measured whole optical characteristics are unknown.
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patent: 5303022 (1994-04-01), Humphrey et al.
patent: 5307141 (1994-04-01), Fujieda
Oana Yoshinori
Yanagi Eiichi
Kabushiki Kaisha Topcon
Pham Hoa Q.
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