Abstract: A wide band demodulator of phase modulated radio frequency signals is disclosed, wherein first and second sets of sonic waves are generated within a Bragg cell, one set being phase shifted with respect to the other set, together with means for directing a linear diffraction pattern of the light output of the Bragg cell at first and second phase displaced correlation masks, together with a first and second array of photodetectors which receive the integral of the light passing through associated masks, thereby to enable the simultaneous detection of a very large number of phase modulated signals on a real time basis, and wherein there is virtually no interference between channels and the need for a very large number of local oscillators is eliminated.

Abstract: A method for making lightweight mirrors. The method consists of metallizing a precise pattern onto the back surface of a mirror element so as to provide a surface to which stiffening ribs or other components, such as flexure components, may readily be soldered.The method according to the present invention avoids the expense of conventional machining techniques and provides a better quality bond than is attainable by normal cementing. It also eliminates the risk of distortion and spoilage that is borne in fusing by firing to the softening point of the glass.

Abstract: A progressively variable focal power ophthalmic lens. The lens has a unique geometry which allows the correction of distortion of horizontal and vertical lines to be retained below detectable levels in the temporal peripheral zone of the lens after the lens is rotated to accommodate the left or right eye. In addition, the geometry further allows the minimization of the astigmatic aberration in the area of the peripheral zone adjacent to the distance portion and the elimination of the astigmatic aberration in the lower part of the temporal peripheral zone.

Abstract: A teaching device to assist first-time wearers of progressive power eyeglasses in becoming accustomed to their use. The device according to a preferred embodiment, comprises a decal adapted to be attached to the lenses of the glasses, and provided with precisely shaped and positioned cutouts to locate and uncover at least parts of the distance, reading and progressive corridor portions of the lenses.By wearing glasses with the decal affixed to each lens for a couple of hours or so, the wearer can conveniently and easily learn which areas of the lenses to use for particular viewing tasks. After a couple of hours of use, the decals can simply be removed and discarded.

Abstract: A piezoelectric wavefront modulator is disclosed having mirror actuators including a first and second layer of piezoelectric material, both internally polarized in a given direction, together with electrode means for increasing the internal electric field in one layer while decreasing the internal electric field in the other layer. As the layers are clamped to the modulator support elements at opposite edges, the degree of bending of the layers may be carefully controlled to cause pusher elements to actuate a mirror, which mirror is oriented parallel to the major surfaces of the top layer of piezoelectric material.

Abstract: An eyeglass case having a novel separator element incorporated within it to prevent the temple tips of an inserted pair of eyeglasses from contacting and rubbing against the lenses thereof. The separator element preferably comprises a flexible strip secured to an inside edge of the case and extending into the case a distance of approximately one-third the width of the case such that when a pair of eyeglasses are inserted into the case, the temple portions of the eyeglasses will be positioned on one side of the separator element while the lenses thereof will be positioned on the opposite side thereof.The invention is primarily designed for use in connection with cases of the "open-end" type although it is not restricted thereto.

Abstract: Multi-faceted rotating optical scanning system having facet angle corrector means for reducing banding in imagery produced therewith. In accordance with the invention, the corrector means comprises a corrector plate supporting a plurality of transparent discs, each one of said discs being positioned in advance of a different facet of said scanner. Each of the discs is further designed to have a slight wedge angle between its two surfaces such that by independently rotating each disc, a light beam passing through it can be bent by a precise amount to control the angle at which the beam impinges upon the associated facet, and, hence, the angle at which it is reflected therefrom onto an image receiving medium. This system thus permits any banding that might otherwise be caused by relative differences in the angular orientation of each facet to be essentially eliminated in a highly accurate, inexpensive manner.

Abstract: The disclosure is directed to an extremely compact camera-processor which is configured to sharply reverse the direction of the exposed light sensitive sheet as it leaves the exposure plane. The light sensitive sheet is thereafter driven downwardly into a processor bath along with a relatively flimsy receptor sheet.

Abstract: A wavefront modulator includes a multiple layer unitary block of a piezoelectric medium having a mirror bonded to the uppermost surface of the block. First and second sets of electrodes are formed within the block at each of a plurality of discrete electrically-addressable locations, such that the electrodes of the first set are positioned at one side of each of the layers, and the electrodes of the second set are positioned at opposite sides of each of the layers in order to increase the sensitivity of response of the modulator to in turn decrease the requisite driving or control voltages. The first and second sets of electrodes are offset with respect to each other to provide for ease of electrical access to each electrode of each set.

Abstract: A piezoelectric wavefront modulator employs a plurality of widely-separated posts, which are formed upon the upper portion of a monolithic piezoelectric medium and are affixed to the lower portion of a flexible mirror. The posts extend from the top surface of the piezoelectric medium a sufficient distance, so that the mirror floats. The posts are surrounded by moats formed within the medium, which are configured to produce a highly sensitive device, wherein the post mirror actuators are substantially electromechanically isolated from each other, but not from the piezoelectric material adjacent the moat.

Abstract: A unique gear drive control means is provided for causing the execution of various operations in the camera processor, such as driving the light sensitive medium to the exposure station, cutting the medium, driving the medium through a second transport means, and driving the medium again through the second transport means, along with a receptor sheet, which sheets are thereafter introduced into the entrance portion of a diffusion transfer processor. A single motor turns both the rocker itself and three gears mounted thereon, which gears sequentially actuate various drive gears of the processor to carry out the various film manipulation steps.

Abstract: A compact, all-reflecting optical system for viewing distant objects. The system comprises a negative convex secondary mirror placed between a positive concave primary mirror and a positive concave tertiary mirror. The system has an eccentric field of view in that the field of view lies entirely on one side of the optical axis, and because of this, the light travelling from the object to the image will pass entirely outside the secondary mirror, both when entering the system and when travelling from the tertiary mirror to the image. Accordingly, with the present invention, there is no central obstruction and no consequent restriction on field of view and power distribution between mirrors as is found in prior art all-reflecting systems.

Abstract: The intensity of light beams transmitted through a tunable acousto-optic modulator is controlled by modulating the center wavelength of the filter passband. Such wavelength modulation can be obtained by modulation of the acoustic frequency or the crystal birefringence. An acousto-optic modulator of this type is sensitive to the temporal coherence of the light beam. When used in an optically coherent detection system, it can provide detection of very weak laser beams in the presence of strong incoherent background radiations.

Abstract: It is desirable to position instant film at the viewing imaging plane of a camera-processor having a light shield surrounding the viewing plane. The use of a conventional film holder causes interference between the dark slide and the light shield. By modifying the dark slide, the slide is completely removed from the film holder positioned within the special camera back, and the back is thereafter pivoted to enable the film to be positioned at the viewing plane.

Abstract: A generally rectangular cartridge is provided having a substantially skewed side wall together with exit orifice means and an associated light seal positioned between a terminal portion of the skewed side wall and the adjacent wall of said cartridge. An end of roll detector is also provided, employing a movable roller which activates a microswitch when the supply of film in the cartridge becomes exhausted.

Abstract: Apparatus for monitoring razor usage. The apparatus comprises an indicator means supported within a hollow handle portion of the razor and slidable to selected positions along the length thereof for alignment with numbered indicia on the handle to permit monitoring the number of times that the razor has been used.The apparatus provided may be used with razors of either the reusable or disposable type and can be incorporated into such razors with only minor alteration of the razor design.

Abstract: Method and apparatus for obtaining the doppler transform of a one-dimensional linear signal by re-arranging the signal into a two-dimensional raster form image pattern and then obtaining an optical linear transformation of the two-dimensional image. An optical circuit is provided for carrying out the transformation and is designed to process the signal for a large number of doppler levels in rapid succession without it being necessary to rescan the initial signal each time as in the prior art. Accordingly, a substantial reduction in processing time is achieved.The invention has been developed primarily for use in locating the position of underwater objects through the use of sonar, but has application in a variety of other data processing fields.

Abstract: Apparatus for feeding sheets one-at-a-time from the bottom of a stack of sheets. The apparatus includes a conventional suction assembly moveable into contact with the bottom sheet in the stack to attach itself to that sheet, and thereafter moveable away from the stack to carry that sheet toward a utilization device. Although such a feeding system is usually effective, it has been found that the suction assembly will not reliably attach itself to the bottom sheet when that sheet is curled, arched or otherwise deformed even if only to a relatively minor extent. To alleviate this deficiency, the present invention provides a hold-down assembly moveable with the suction assembly to press down against the top of the stack to press out any deformations in the sheets while the suction assembly is operating to ensure that it will reliably attach itself to the bottom sheet.