Abstract: There is described apparatus for combining a plurality of pulsed laser beams into a single beam by a rotating mirror assembly. A rotor supports a plurality of individual mirrors arranged in a plurality of axially spaced planes, one plane for each beam. The mirrors in successive planes are angularly and radially spaced relative to mirrors in the other planes. Incident beams are pulsed successively in synchronism with rotation of the mirrors. Each beam in succession is reflected by a mirror in successive planes along a common axis to form a single reflected beam.

Abstract: A combined lens cover (15) and sunshade (14) for a camera (10) having a generally tubular mount (11) extending around and outwardly of the lens (12) includes a ring (20) attachable to the tubular mount (11). The sunshade (14) is movable from a first position around the mount (11) to a second position outward thereof. The lens cover (15) is movable from a first position covering the lens (12) to a second position exposing the same. Means (34) are provided to connect the ring (20) to the sunshade (14) to maintain the lens cover (15) in its first and second position. Additional means (26) are provided to connect the ring (20) to the lens cover (15) to move the lens cover (15) from the first to the second position.

Abstract: An adjustable light reflector assembly attached to the valve of an automobile tire and secured in place by the valve cap. An assembly consisting of a light reflector housing molded of a plastic material which is screwed onto a die cut metallic strip perforated with a row of equally spaced holes suitably sized to fit around the valve's threaded portion. A light reflector protruding just outside the outermost edge of the tire's sidewall so as to reflect light back at following traffic once during each rotation of the wheel creating a flickering effect whose intervals of brightness vary with the speed of travel.

Abstract: A pair of eyeglasses of the variable-lens type is described including a positioning member adjustable on the eyeglass frame and engageable with the base of the wearer's nose to stably support the eyeglass frame in either a normal position, or in an elevated position with respect to the wearer's eyes.In one described embodiment, the positioning member includes a saddle shaped element pivotably mounted to the eyeglass frame underlying the frame bridge; and in a second described embodiment, the positioning member includes a clip slidable receivable on the bridge of the eyeglass frame.

Abstract: An improved optical system is disclosed for rapid, accurate spectral analysis of the reflectivity or transmissivity of samples. A concave holographic diffraction grating oscillated at high speed is utilized to provide a rapid scanning of monochromatic light through a spectrum of wavelengths. The grating is positively driven at very high speed by a unique cam drive structure comprising identically shaped conjugate cams. The rapid scan by the grating enables the reduction of noise error by averaging over a large number of cycles. It also reduces the measurement time and thus prevents sample heating by excessive exposure to light energy. A filter wheel having dark segments for drift correction is rotated in the optical path and is synchronous with the grating. Source optics is employed to optimally shape the light source for particular applications.

Abstract: Monochromatic excitation light penetrates an indicator in an indicator sp. The indicator space is closed off at the side to be brought into contact with the substance to be analyzed by means of a membrane permeable for the component of the substance whose concentration is to be ascertained. The side of the indicator space facing the light-measuring unit of the device is radiation-transmissive. The indicator is set into motion during the measurement operation. Alternatively, the substance to be analyzed, on the other side of the permeable membrane, is set into convective motion during the measurement operation. As a further alternative, both the indicator and the substance to be analyzed are set into motion in mutually perpendicular directions, which however are both parallel to the permeable membrane.

Abstract: A display head for an aircraft head-up display system wherein a display developed by a projector (11) is reflected to the observer in part by a semi-reflective coating (31a) on the side (29a) of the combiner light transmissive body (27) nearer the observer, and in part by a semi-reflective coating (31b) on the side (29b) of the combiner body further from the observer, the two coatings being positioned relative to one another and the projector to provide the observer with an uninterrupted instantaneous field of view of the display.

Abstract: A motor vehicle rear view mirror is disclosed having a mirror glass which pivots automatically from a normal position to an anti-glare position in response to headlight glare. The glass is mounted between a front frame and a back plate of a two part housing and carries a magnetic member for co-operating with a solenoid coil of an electrical assembly. The electrical assembly is formed as a single unit mounted in the back plate and includes a photosensor receiving light through a partly silvered region of the mirror glass. A signal from the photosensor is amplified by one or more transistors to energize the solenoid coil. A pair of switch contacts is actuated when the mirror glass changes its position to the anti-glare position and is arranged to reduce current flow in the coil to a level just sufficient to hold the mirror glass in the anti-glare position.

Abstract: A display unit for a head up display wherein the combiner (11), which serves to reflect light from a display surface (14) towards an observer to provide the observer with an image of the display superimposed on his view through the combiner, comprises first and second tuned reflective coatings (25c and 27c) disposed in such angular relationship with one another and the display surface that narrow waveband light from the display surface reaches the observer after being successively transmitted through the first coating, reflected at the second coating, reflected at the first coating and transmitted through the second coating.

Abstract: An apparatus for providing a display of information or a source of light to a viewer or an object along the line of sight between a user of the apparatus and the viewer or object without preventing the user's normal vision. The apparatus generally includes an element which provides visible images to the viewer, a member which blocks the visible image from the user, and an activating device which provides oscillating activation signals to the imaging element and the blocking member. The apparatus may also include prisms associated with each other to reflect certain images or light to the viewer or object.

Abstract: A retroviewer for viewing documents, labels or other articles having a retro-reflective legend bearing layer of microscopic beads overlying a portion or all of the information on the article. The layer appears transparent under normal diffused lighting conditions but when illuminated by substantially collimated light, the information is obscured leaving the legend prominently displayed. Altered or counterfeit articles are thus easily detectable. The retroviewer is designed to accommodate articles of various shapes and sizes and to permit the observer to view an article from a comfortably seated position, with adjustments possible for observers of various heights.

Abstract: The main components of the frame are constituted by slats of wood arranged in layers, shaped and adhesively assembled.

Abstract: An improved optical device in combination with means for holding the device in position before the eye including an optical device formed of an opaque mask for mounting before the eye, a horizontal transparent area extending substantially across the mask centrally thereof, an array of discrete circular transparent areas on the mask, the array being disposed below the horizontal transparent area and each circular area having equal diameters of between 0.5 and 1.2 mm. is characterized by an increase in the total aperture of the transparent areas on those portions of the opaque mask where the eye-to-mask distance increases thereby permitting a greater field of vision while limiting the influx of light.

Abstract: Spectacles have a stay bar pointing rearwardly from the edge of the frame and an extension spectacle arm. A hinge connects the spectacle arm and the stay bar on the inside, so that the front faces of the stay bar and the spectacle arm are spaced apart in the open position of the spectacle arm. A leaf spring extends on both sides of the front faces, spaced from the hinge swivel. It is rigidly connected to one outer surface of the spectacle arm or stay bar at one end region. The other end region of the leaf spring is adapted to touch the other outer surface of the spectacle arm or stay bar in the swivel position of the spectacle arm corresponding to its desired open or stop position.

Abstract: A reflective heat transfer combination and the method of making same whereby a tacky mixture of tack wax and mineral spirits defines a carrier layer applied over a paper substrate capable of absorbing the carrier layer when melted in response to heat and disposing a layer of glass beads over the carrier layer and forcing the glass beads into the carrier layer and against the paper substrate while allowing portions of the beads to be exposed above the carrier layer. A liquid binder layer of acrylic plastic is disposed around the beads and over the carrier layer while leaving portions of the beads exposed and is dried to retain the beads in position. Thereafter a liquid reflective coat of acrylic plastic is applied over the binder layer and covering the beads to provide a reflective background for reflecting light back through the beads. While the reflective coat is liquid and before being dried, a powdered adhesive is disposed over the reflective coat and thereafter the reflective coat is dried.

Abstract: A pair of upper and lower brackets are supported from the inner forward upstanding marginal edge portion of a side mounted vehicle rear vision mirror and a vertically elongated wind deflector panel assembly is supported from the brackets. The panel assembly includes a main deflector panel spaced between the vehicle side and the forward inner marginal portion of the mirror and also includes forward inner and rear outer upstanding marginal portions. The panel assembly additionally includes a secondary panel stationarily supported relative to the main panel, disposed on the outer side thereof and spaced between the main panel outer rear marginal portion and the mirror forward inner marginal portion. The main panel is rearwardly and outwardly inclined relative to the vehicle and the secondary panel is inclined relative to the main panel to define a forwardly opening obtuse angle therewith.

Abstract: An eyeglass element of spectacles, to which a component, such as a nose piece or a temple piece of the spectacles or an ornamental piece, is to be affixed, includes a through hole having an enlarged end portion in which an actuating portion of a connecting member which is threadedly connected to the component is received when the connecting member assumes its tightened position. The connecting member may be configurated as a nut having a transverse slot extending across a threaded bore of the nut, and then a screwdriver having a bifurcated end portion may be used for tightening the nut and subsequently the portion of the stem onto which the nut is threaded which extends beyond the nut may be severed from the remainder of the stem.

Abstract: An apparatus for indicating to the operator of a following vehicle that his headlights are operating in the high beam mode is disclosed. A light reflective surface is provided for mounting on the rear of a vehicle and is positioned so that when a following or trailing vehicle is being operated with its headlights in high beam mode and the trailing vehicle is sufficiently close to the lead vehicle, a small portion of light from the high beams will be reflected backwardly, substantially in the direction of the course so as to provide a warning indication to the following vehicle that he is too close for high beam operation. During normal or low beam operation by the following vehicle, the position of the apparatus is such as to give little or no reflection.

Abstract: An account is given of a test vessel, more specially for use in a photometer. The vessel has inwardly running wall parts forming hollows and at the edges of these hollows there are outwardly running hollow processes for taking up capillary tubes used in conditioning a liquid in the vessel for a measuring operation.

Abstract: A collapsible binocular and a blank for forming the same and made of semi-rigid sheet material, the binocular having front and rear lens mounting panels connected by top and bottom panels having integrally formed hinges therein, and end flaps attached to the lens mounting panels and connected at approximately the mid-point of the binocular, the top and bottom panels also including integrally formed hinges so that the binocular may be collapsed to a flat, compact package and stored within a one piece sleeve when not in use.