Barnes Engineering Company

Seymour C Spielberger

Robert C Savoca

An interference filter is deposited on a high temperature transparent plastic film which passes normal incident radiation below 694 nm and reflects other wavelengths out to 1064 nm regardless of the angle of incidence of the laser radiation applied thereto. The interference filter is optically bonded directly onto a ballistic protective plastic substrate which transmits visible radiation thereby providing a laser shield having ballistic properties as well as laser radiation rejection properties. The ballistic protective plastic substrate may also contain absorbing dyes for absorbing laser radiation in the region of high sensitivity of 400 to 700 nm. The interference filter is then optically bonded directly onto the transparent ballistic protective plastic substrate thereby providing a protective laser shield having ballistic protection properties as well as hybrid filter properties both absorbing and reflecting laser radiation. The absorption dyes are incorporated in the transparent ballistic protective plastic substrate, such as polycarbonate, prior to the bonding of the interference filter onto the substrate. The protective laser shield can be incorporated in lenses, protective eyeware, windows etc. for protecting the view from laser radiation.

Ballistic protective laser shield

A hand-held radiometer for non-contact temperature measurement of objects is provided with a probe which is adapted to be mounted on the optical barrel of the radiometer to permit the radiometer to which it is attached to provide contact temperature measurements. The probe comprises a thin plastic film of low thermal mass which is shaped on one end thereof to be easily deformed when brought into contact with a specimen whose temperature is desired to be measured. The inner surface of the plastic film has a high emissivity, and a retainer means is provided on the other end of the thin plastic film for mounting the probe on the optical barrel of the radiometer.

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Roslyn Heights, NY, United States of America

Seymour C Spielberger