Optics: measuring and testing – Lens or reflective image former testing – For optical transfer function
Patent
1996-07-22
1998-03-31
Font, Frank G.
Optics: measuring and testing
Lens or reflective image former testing
For optical transfer function
G01B 900
Patent
active
057344655
ABSTRACT:
A lens meter in which a measuring light flux is projected against a lens to be examined and the optical characteristics of the examined lens are measured in reference to the position of an image formed on a light receiving element by the measuring light flux passed through the examined lens is comprised of a mode changing-over device changing-over to a mode for measuring an additive diopter of a progressive focus lens, a measuring device for continuously measuring a refractive power of the examined lens, a reference position setting device for sensing a position having a predetermined optical characteristics of the progressive multifocus lens and defining a reference position of the examined lens, a displacement sensing device for sensing a displacement position of a measuring point from the reference position, and a displaying device for displaying the displacement sensed by the displacement sensing device. In addition, there are a provided lateral displacement sensing device for sensing a lateral displacement of a measuring point of the examined lens, a sensing device for sensing the right and left ends of a progressive section of the progressive focus lens, and a progressive section displaying device for displaying the progressive section in response to the results obtained by the sensing device and the lateral displacement sensing device.
REFERENCES:
patent: 4730924 (1988-03-01), Allard et al.
patent: 4826315 (1989-05-01), Kohayakawa
patent: 5173739 (1992-12-01), Kurachi et al.
patent: 5247341 (1993-09-01), Kurachi et al.
patent: 5349433 (1994-09-01), Iwane
patent: 5379111 (1995-01-01), Kajino et al.
patent: 5521700 (1996-05-01), Kajino et al.
Font Frank G.
Merlino Amanda
Nidek Co. Ltd.
LandOfFree
Lens meter for measuring a shape of a progressive section does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lens meter for measuring a shape of a progressive section, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens meter for measuring a shape of a progressive section will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-56003