Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Combined
Patent
1998-08-10
1999-11-30
Dang, Hung Xuan
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Combined
351 41, G02C 100
Patent
active
059929960
ABSTRACT:
In an apparatus for measuring facial exposure to radiation, a housing is provided and includes a first recess defined in-part by an end wall. A chip holder is also provided and defines a second recess adapted to carry a thermoluminescent dosimetry chip. The chip holder is positioned in the first recess with the end wall and the first recess cooperating to form a chamber that encapsulates the thermoluminescent dosimetry chip. The apparatus is mountable to an eye protective device, such as a face shield, eyeglasses, or safety glasses to measure the amount of radiation to which the facial area of the wearer is exposed.
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patent: 4372680 (1983-02-01), Adams et al.
patent: 5151600 (1992-09-01), Black
patent: 5446507 (1995-08-01), Chang
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