Eyeglass frame measurement apparatus

Details Eyeglass frame measurement apparatus Eyeglass frame measurement apparatus

2007-03-07

2008-10-14

Stafira, Michael P (Department: 2886)

Optics: measuring and testing

Shape or surface configuration

C356S218000, C033S551000

Reexamination Certificate

active

07436523

ABSTRACT:
An eyeglass frame measurement apparatus includes a holding unit; a rotational base and a tracing stylus arranged on the rotational base. Three-dimensional shape of a frame is measured by detecting the movement of the tracing stylus in a radius direction and a warpage direction. Slit place is integrally arranged with the stylus and a light-projection-and-receiving unit that includes a light-emitting portion and a two-dimensional sensor capable of selecting a received pixel is arranged on the base. The two-dimensional sensor includes first and second light-receiving lines not parallel to each other, and includes a first slit not parallel to the first light-receiving line and a second slit not parallel to the second light-receiving line. The movement of the stylus is detected based on a projection position of the first and second slits detected by the first and second light-receiving lines.

REFERENCES:
patent: 5138770 (1992-08-01), Matsuyama
patent: 5139373 (1992-08-01), Logan et al.
patent: 5228242 (1993-07-01), Mastsuyama
patent: RE35898 (1998-09-01), Shibata et al.
patent: 6325700 (2001-12-01), Mizuno et al.

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