A method is disclosed for reproducing a duplicate having a mirror optical surface from a master optical surface. In particular, a master is produced by conventional methods such as deposition and grinding to provide an optical surface. Next, a nonadhering layer of a reflective material is applied to the optical surface of the master, which may be used repeatedly. An adhesive is applied over the nonadhering layer and a suitable base structure is pressed into the adhesive. When the adhesive has be...

A thin polymeric strip material which is formed on one surface with a plurality of ridges and grooves defining a surface affording in the presence of light an optical image in space having an appearance other than that of a surface of said strip. The article may have a coating over the surfaces of the ridges affording a reflective surface and an optical image. Preferably an adhesive is applied on the strip material to bond the same to the surface of an article to afford ornamental and utilitaria...

A novel type of swimming goggles includes an improved means for receiving corrective lenses. The corrective lens forms the outermost face of the goggles and is easily insertable. The novel swimming goggles of this invention are inexpensive to manufacture. The lateral vision of the swimmer is improved due to the transparent sidewall construction of the goggles. A resilient gasket between the goggle socket and the face of the swimmer allows for a watertight seal therebetween.

An electro-optical network having two electrically isolated units which are optically coupled by means of two optical couplers each comprising a light-emitting diode and a phototransistor positioned in light-coupled relationship to the diode. One of the optical couplers is used for signal transmission between the two units, the other coupler providing a positive feedback path for the transmitted signal. This positive feedback arrangement serves to improve the switching speed of the output side o...

A missile employing an interconnection system for the transfer of control signals between missile segments whereby effects of electrostatic and electromagnetic fields can be eliminated and weight reduced through the use of fiber optics to replace usual shielded cables for interconnections.

Laser systems which are pumped by an electric discharge formed in a gas are disclosed. The discharge is in the form of a vortex stabilized electric arc which is triggered with an auxiliary energy source. At high enough repetition rates residual ionization between successive pulses contributes to the pulse stabilization. The arc and the gain medium are positioned inside an optical pumping cavity where light from the arc is coupled directly into the gain medium.

A composition is produced by combining one or more members selected from the group consisting of cinnamic acid-vinylphenyl ester, cinnamic acid-isoalkenylphenyl ester, and homologs thereof, styrylacrylic acid-vinylphenyl ester, styrylacrylic acidisoalkenylphenyl ester and homologs thereof with a cationic polymerization catalyst. This composition is polymerized or copolymerized to form a novel photosensitive product. The product thus obtained is a linear polymer or copolymer in which only the vin...

Systems and methods are described for optically powered optically controlled optical switches. A method includes powering an optical switch with a communications data signal; and controlling the optical switch with the communications data signal. An apparatus includes a primary optical input port; a secondary optical input port; an optical tap coupled to the primary optical input port; an optical switch coupled to the optical tap and to the secondary optical input port; an optical-to-electrical ...

Amides of carnitine or acyl-carnitines having general formula: ##STR1## wherein X.sup.- is a halogen anion, e.g. the chloride anion R is either hydrogen or an acyl radical, such as acetyl, propionyl or butyryl; and Y is the residue of an optically active esterified amino-acid (e.g. the residue of L-phenylglycine methyl ester, ##STR2## are prepared by either (a) directly condensing D,L-carnitine (or acyl-D,L-carnitine) with an ester of an optically active aminoacid, or (b) preparing the acid halo...

A transceiver provides bidirectional optically isolated communication between two devices. A first output signal from the first device is input to the transceiver. Using parallel optical data links, an optical signal is generated in response to the first signal and is detected by a pair of light sensitive devices. These light sensitive devices cause a second signal, representative of the first signal, to be generated. The second signal is then conducted to the input terminal of the second device...