Optics: measuring and testing – Sample – specimen – or standard holder or support – Fluid containers
Patent
1998-10-16
2000-09-12
Font, Frank G.
Optics: measuring and testing
Sample, specimen, or standard holder or support
Fluid containers
356244, 356124, G01N 110
Patent
active
061185280
ABSTRACT:
A lens meter is provided which includes a light source portion which emits measuring light having at least three different wavelengths; a light receiving portion which receives the measuring light which has passed through a to-be-inspected lens immersed in a liquid as a medium; an in-medium optical characteristic measuring device for measuring an optical characteristic of the lens in the medium about each wavelength, based on a deviated quantity of the measuring light detected by the light receiving portion; a refractive index calculating device for calculating a refractive index of material of the lens, based on a difference of the optical characteristic of the lens in the medium among the wavelengths; and a converting device for converting the optical characteristic of the lens in the medium into an optical characteristic of the lens in the air, based on the refractive index calculated by the refractive index calculating device.
REFERENCES:
patent: 3779648 (1973-12-01), Poster
patent: 4072428 (1978-02-01), Moss
patent: 4277172 (1981-07-01), Richards
patent: 4415076 (1983-11-01), Campbell
patent: 4496243 (1985-01-01), Machida
Font Frank G.
Kabushiki Kaisha Topcon
Natividad Phil
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