Process and device for the positioning of an optical measuring i

Details Process and device for the positioning of an optical measuring i Process and device for the positioning of an optical measuring i

1981-01-14

1983-07-05

Punter, William H.

Optics: measuring and testing

By polarized light examination

With light attenuation

351204, 351245, 356127, G01B 1114, A61B 300

Patent

active

043915272

ABSTRACT:
The invention concerns a process and device for the positioning of an optical measuring instrument and a spectacle frame in relation to each other. The practitioner, operating from a position roughly determined by the point at which the two optical paths converge adjusts the relative position of the spectacle frame and measuring instrument so that the reflection of the side edge of the frame in a semi-transparent mirror located on each side of the device appears directly over the actual image of an alignment mark behind the mirror. This convergence indicates that the frame is in the correct position in relation to the measuring instrument.

REFERENCES:
patent: 2087235 (1937-07-01), Ames, Jr. et al.
patent: 4212538 (1980-07-01), Esmond

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