Optics: measuring and testing – Lens or reflective image former testing – For optical transfer function
Patent
1990-05-23
1991-11-19
Evans, F. L.
Optics: measuring and testing
Lens or reflective image former testing
For optical transfer function
G01B 900
Patent
active
050661191
ABSTRACT:
A device for phase detection testing any kind of optical system, in particular an ophthalmic lens, comprises, along an optical path, an emission device which constitutes a light source, a holding station which receives the optical system under test, an array, a receiving device which receives the image observable downstream of the array, and a data processing device which exploits this image by phase detection. Between the light source and the holding station is a separator element which constitutes on the axis of the optical path a semi-reflecting surface. The receiving device is disposed to the side, in line with the separator element. The data processing device includes a ray plotting program and a calibration system allowing for theoretical and manufacturing aberrations due to the separator element.
REFERENCES:
Applied Optics, vol. 27, No. 3, Feb. 1988, pp. 523-528; K. Omura et al.: "Phase Measuring Ronchi Test" pp. 525-527.
Applied Optics, vol. 23, No. 20, Oct. 1984, pp. 3676-3679; T. Yatagai: "Fringe Scanning Ronchi Test for Aspherical Surfaces" pp. 3677-3678.
Brown Charles A.
Essilor International "Cie Generale d'Optique
Evans F. L.
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