Abstract: Disclosed is a transfer type each-side exposure apparatus which comprises light sources which oppose each other and transfer means which transfer materials to be exposed between the light sources. In one aspect, the apparatus further comprises light shielding means which prevent the passage of the light rays for irradiation as required, and control means which controls the actuation of the light shielding means. In another aspect, the apparatus further comprises reflectors which consist each of a cold mirror. In still another aspect, the apparatus is such that the light sources are each disposed in a manner that a cathode constituting its light emitting portion is displaced by a small distance from one of focal points of a corresponding reflector provided in the light source.

Abstract: A large document scanner has a transparent top plate glass plate large enough to support an E size drawing. The base of the cabinet supports a trapezoidal mirror tilted up from the bottom with the larger parallel side above the bottom. The image of a document on the transparent plate is reflected by the trapezoidal mirror to a digital imaging camera system having a mechanically displaced electronically scanned array located inside the cabinet to the side. Tubular lamps located adjacent to bowed out upper sides between upper and lower planar reflectors illuminate the document on the transparent top glass plate.

Abstract: The invention relates to a device for reproduction and tracing by forming an image of an original, at desired scale which is produced by at least one lens, on a screen on which a sheet of photosensitive materials, such as a picture film, or tracing paper is extended, comprising separate illumination systems for reproduction and tracing, wherein the illumination system for tracing is retracted in a retraced position located off the lighting space of the illumination system for reproduction, and turned over so as to eliminate spoilage of the quality of the reproduced picture by diminishing irregular reflection from the illumination system for tracing to the lens when a part of light from the illumination system for reproduction is emitted thereto during the reproduction operation.

Abstract: An apparatus for producing internegatives includes a slide holder for positioning the slide from which the internegative is to made, a primary photoflash unit for back-illuminating the slide and projecting the image thereof into a camera, a secondary photoflash unit for directing a contrast correction exposure into the camera via a reflecting plate, and a stored programed controlled processor for controlling the time duration of the primary exposure, the contrast correction exposure, and the operation of the camera so as to properly exposure the film in the camera. A back-illuminated light screen is provided to allow the operator to evaluate the brightness of the slide so as to control the duration of the primary exposure and the contrast correction to consistently produce properly exposed internegatives.

Abstract: An exposure device suitable for use in a copying machine includes a gutter-like mirror composed of an upper mirror and a lower mirror so that light projected from a light source onto the lower mirror is reflected to illuminate the surface of an original document in the pattern of a strip but light projected from the light source onto the upper mirror is reflected first onto the lower mirror and then reflected again by the lower mirror to illuminate the surface of the original document in the pattern of the strip. At least four small bulbs are arranged as the light source along the length of the gutter-like mirror and the envelopes of the small bulbs are frosted only at portions through which the internal filaments of the small bulbs face on the lower mirror.

Abstract: A lamp unit includes a pair of support members facing each other and three baseless fluorescent lamps supported parallel to one another by the support members. Each support member has three support recesses located at predetermined intervals. One end of each lamp is fixedly inserted into each corresponding support recess of one of the support member and the other end to each corresponding support recess of the other support member. Each lamp has a radiation window extending in the axial direction thereof. The lamps are positioned so that light beams emitted from the windows thereof intersect on a desired straight line.

Abstract: A light source device for a color enlarger, in which at least three linear light sources are used in order to served as a red light source, a green light source, and a blue light source, respectively, are disclosed. In the device, the linear light source serving as a red light source is arranged perpendicularly to an optical axis of a projection lens in the color enlarger. The other linear light sources serving as green and blue light sources respectively, are arranged perpendicularly to the optical axis and are symmetrical with respect to the optical axis.

Abstract: A dias light device to be placed on the original holder of a reproduction camera for effecting exposures with high enlargement of small originals comprises a housing provided with a window to receive a small original, such as a transparency, a light source in the housing, a light sensor for detecting light from a light source of a reproduction camera and a control system responsive to the sensor for activating the light source in the housing when the camera light source is active. The dias light device is applicable to any existing reproduction camera without any need to connect it with or alter the camera.

Abstract: A system for producing images of documents is disclosed. The system provides varying levels of illumination to different areas of the document being recorded, depending upon relative image densities across the document. A slit aperture image area is divided into a plurality of illumination zones and the image density of each zone is sensed and adjusted individually. Efficient and orderly unattended off-loading of photographed documents is accomplished by a movable drawing member over which large documents are automatically draped, properly collated. A catch tray is provided for automatically off-loading and collating smaller documents.

Abstract: A selective color copyability illuminator includes a pair of lamps each having a spectral emission suitable for copying black and white documents or documents incorporating a specific color. The lamp emissions are selectively controlled depending upon the color of the document being copied. Faceted reflectors, associated with each lamp, are moved to positions which cover or uncover the lamp aperture to enhance selective deletion of a particular color of the document being copied.

Abstract: A flash exposure optical imaging system is provided which includes a light housing having a movable top and bottom surface. The top surface contains a document platen, the bottom surface a fixed, wide-angle projection lens. These surfaces are vertically translated past a fixed, central housing wall to vary the system conjugate in response to changes in magnification. In a preferred embodiment, a pair of football shaped cams are rotated in response to position signals from a controller initiated by a magnification change. A pair of T-bars and linkage mechanisms are associated with these cams and their motion provides simultaneous vertical motions to the top and bottom housing surfaces, respectively. During the vertical excursion of the floor assembly, an additional horizontal motion is imparted to the lens so as to maintain correct corner registration of the document at the image plane.

Abstract: A selective color copyability illuminator includes a pair of lamps having complementary spectral emission. The ratio of the lamp outputs are adjustable to enhance a first color of an original to be copied while suppressing the second color. The power input to the lamps is also continually adjustable to maintain a desired exposure level at an imaging plane. In a preferred embodiment, a dichroic reflector is utilized with each lamp to enhance system efficiency.

Abstract: The invention disclosed, a microprocessor based exposure computer, automates the time consuming and tedious calibrations and calculations which were necessary to reproduce high quality copy in the field of graphic arts. The automated nature of the invention includes the ability of the device disclosed to perform a self calibrating function which greatly reduces the set-up time of the instrument which in the past has required trial and error calibrations involving the repeated manipulation of a gray scale of varying density or other variable light attenuator.

Abstract: The optical density pattern of an original document (26) is sensed during scanning movement for radiating a light image of the document (26) onto a photoconductive belt (27) which is held stationary during the scanning. Operating parameters of the apparatus (21) which are to be controlled after completion of scanning are computed as functions of the sensed pattern. Copy sheets of different sizes are provided, and the copy sheet size is selected to be equal to the sensed width of the document (26). Illumination lamps (37) are selectively energized to discharge non-image portions of the belt (27) between scanning and developing in accordance with the sensed dimensions of the document (26). A developing bias voltage is controlled in accordance with sensed document density and contrast.

Abstract: A half tone screen of a graphic camera is uniformly exposed by a pinhole light projector positioned off axis with respect to the main optical projection axis. A light diffuser is positioned intermediate a light source and the pinhole has a variable density light attenuator pattern consisting of a plurality of circular lines for attenuating the light passing through the diffuser and aperture in a manner to produce uniform illumination of the half tone screen.

Abstract: In a vacuum printer for the graphic arts having a housing, blanket and glass frames upon the housing adapted to receive a negative and a light sensitive sheet, and an upright mounted upon and projecting above the housing, an overhead multiple lamp mount console is adjustably spaced from the glass frame and comprises an upright carriage guidably mounted upon the upright. A top frame overlies the glass frame and is secured to the carriage assembly. First and second lamp assemblies of different wattages span and are movably mounted upon a pair of tracks on the top frame adjacent their respective ends. The lamp assemblies are adapted for alternate movements upon the tracks so as to centrally overlie the glass frame, adapted for selective light exposure of the sensitized sheet. A third lamp assembly of a different wattage spans and is movably mounted upon additional tracks underlying and secured to a second lamp assembly adapted for movement thereon to centrally overlie the glass frame.

Abstract: An electrophotographic printing device is provided with an exposure unit comprising light-emitting diodes which are light sources and means for transmitting the light beams emitted from the light-emitting diodes and converging or focusing them like converging lenses, whereby electrostatic latent images of characters and the like are formed on the surface of a photosensitive member.

Abstract: This specification discloses a scanning illuminating device in a copying apparatus of the slit exposure type in which a movable slit area of an original is projected upon a movable photosensitive medium by a projection lens. The device is characterized in that light sources are fixed to the opposite end portions of the original surface with respect to the scanning direction, the magnification of the light source image becomes gradually greater at one end of the scanning direction and gradually smaller at the other end of the scanning direction, and imaging elements are moved in the scanning direction so that the illumination distribution on the original surface is formed so as to compensate for the loss of quantity of light of the projection lens due to the so-called cos biquadratic rule or the like to thereby enable copying of uniform density in the scanning direction.

Abstract: A reflective tunnel of rectangular cross-section with opposing parallel or converging, opposing sides has a light diffuser located at the output opening of the tunnel for integrating the light passing therethrough and a densitometer located near the input opening of the tunnel for measuring the composition of the light within the tunnel. A lamp is positioned at the inner focal point of each of a plurality of dichroic elliptical reflectors which are supported at the input opening of the tunnel so that light emitted by each lamp is projected into the tunnel directly toward the light diffuser. The lamps are symmetrically disposed about the optical axis of the reflective tunnel and the reflector axes intersect the axis of the reflective tunnel at a point which is located between the midpoint of the reflective tunnel and the output of the tunnel.

Abstract: Apparatus for making image reproductions is disclosed having means for providing on a photosensitive support or film two micrographic images, one from a source of white light and the other from a source of black light. A third image may also be provided on the film to provide selected information such as a picture number, or operator and user identification. In the disclosed embodiment, the black light is continuously on while the white light is flashed only when a picture is being taken.

Abstract: In the light path of a photographic enlarger, a supplementary light source is arranged in such a way that an image thereof is formed by the condenser in the focal plane of the imaging lens but outside the range covered by the latter. If the original to be printed has scratches, these deflect at least a part of the light, which reaches them from the supplementary light source into the lens. As a result, that proportion of the actual printing light supplied by the printing light source which is deflected past the lens by the scratches is at least partially compensated. The image of the scratches on the printing material is virtually invisible.

Abstract: Apparatus for producing microform records from hard copy or a cathode ray tube image or the like fed from a selected data source, includes an image-reducing projection system into which is selectively directed light reflected from hard copy or light from the face of a remote cathode ray tube to which white background CRT image-forming signals are fed. The reduced image involved is preferably applied first to a non-archival heat developable mask-forming film, like a dry silver film, and then the image on this film is transferred preferably to an archival film capable of later receiving additional data on unused portions thereof and most advantageously arranged as a microfiche card. A cathode ray tube smaller than the hard copy is positioned below but in spaced relation to a hard copy receiving platform-containing or receiving image field area.

Abstract: Compensation is provided in the illumination of a mechanically line scanned object plane scene, where the light source is moved across the object plane to provide the light necessary for optical projection of the scene onto an image plane. This compensation gives allowance for the difference in light ray coupling effectiveness of the usual projection optics arrangement for light rays which are on axis with the component lenses, relative to the light rays which are off axis. Predetermined compensation of the illumination which nearly matches the off-axis falloff optical characteristics of the projection optics system may provide a substantially flat, uniform field illumination of the projected scene at the image plane. The instantaneous position related illumination is controlled, from a function usually stored in an electronic memory, by changing the effective electric power applied to the illuminating lamp during any predetermined frame of time.

Abstract: An enlarger head for multigrade paper is described which comprises a light mixing system for mixing light from two sources.The system comprises disposed along a longitudinal axis a solid light-mixing member of an optically clear material which has as a light-input face a generally planar sulcated face having grooves therein of equilateral triangular cross-section and a substantially smooth light-output face, said two light sources being diametrically opposed relative to the longitudinal axis and each being adapted to direct light onto said light-mixing member from an angle substantially 60.degree.

Abstract: In a copying machine of the type comprising an image projecting lens movable in a direction of an optical axis thereof for varying a magnifying power, a reflecting mirror interlocked with the lens for effecting focusing, and two groups of light sources for illuminating a manuscript, there is provided an exposure control system comprising variable resistors driven by the projecting lens, oscillators for generating pulse signals of frequencies varying in accordance with resistance variations of the variable resistors and with a variation in a source voltage, counters counting the number of the pulse signals in accordance with an exposure index, and switch means for lighting the light sources during intervals determined by an exposure index.

Abstract: A scanning illuminator has a compact structure suitable for use in high speed copying machines and is adapted to reflect light beams from two light sources fixed adjacent to the opposite ends of an original supporting area to the surface of an original by means of rotary mirrors and translating mirrors for illuminating the original surface in a slit shape. The scanning illuminator has a flexibility in optical adjustment.

Abstract: A slit-exposure type illumination apparatus capable of scanning a stationary original document by swinging an exposure lamp at a predetermined position and having side reflectors on the opposite sides of each linear light source and a pair of auxiliary plane reflectors which are disposed in the scanning direction of the illumination apparatus.

Abstract: A scanning illuminator suitable for use in high speed copying machines is adapted to compensate the distribution of loss in light quantity with respect to an imaging lens due to the so-called Cos.sup.4 law in the scanning direction and includes fixed sources of light. The scanning illuminator is characterized by illuminating systems disposed symmetrically relative to an original supporting area, each illuminating system being adapted for illuminating the opposite end areas of an original by a portion of light beam from the fixed source of light adjacent one end of the original, especially the light beam portion emitted and bled backward of the light source, the illuminating system having at least one rotating or translating scan mirror for scanning the illuminating light beam.

Abstract: A first scale component is stationarily mounted on a stationary lens component relative to which a rotatable lens component is supported. A pointer is supported from the rotatable lens component for angular displacement therewith and the first scale component includes first linear lens stop scale indicia thereon relative to which the pointer is registered and along which the pointer may swing. A second scale component including a second linear size compensation scale is provided and supported from the second scale component for back and forth shifting relative thereto for longitudinally shifting of the size adjustment scale generally along the path of swinging movement of the pointer. A third scale component including a third linear density value scale is supported from the first scale component for back and forth longitudinal shifting of the density scale transverse to the longitudinal extent of an adjacent portion of the size component scale.

Abstract: The lamphouse is used for the production of prints on variable control paper and comprises a first tungsten filament lamp from which light passes through a color selective filter which passes light in one of two mutually exclusive wavebands. A second filament lamp and filter passes light in the other of the two mutually exclusive wavebands. A diffusing screen is placed to pass the filtered light out of the lamphouse and through a transparency which is to be printed.Between each lamp and an alternating voltage source is connected a bidirectional thyristor, whose phase angle of conduction is determined by a microprocessor according to data stored in a read-only memory and by single manual controls for the selecting alternative addresses in the memory according to the contrast of print to be made.

Abstract: Ballasting for a fluorescent lamp is provided by one or more incandescent lamps connected in series between the line voltage source and the fluorescent lamp. Lamp operation is initiated by a triggering pulse applied to a conductive member placed adjacent the fluorescent lamp. In one embodiment, a plurality of incandescent lamps are connected in parallel and are selectively gated into the circuit depending upon exposure requirements for the lamp.

Abstract: In a halftone printing system, halftone positive prints are made directly from gray scale photographic negatives by an enlarger apparatus which shines a beam of light through the negative and focuses an image of the negative on a sheet of high contrast photographic printing paper through a halftone screen. A secondary light source is provided to irradiate the printing paper to provide satisfactory halftone representation of the gray scale. The positive halftone prints are assembled with cold type from which a negative is made. From the negative, a printing plate is then made.

Abstract: Erase apparatus for use in an electrophotographic copier machine where an array of light-emitting diodes (LEDs) are placed adjacent one end of a light channel with the other end adjacent a moving photoreceptive surface. The channel allows light rays to pass freely from LED to LED but contains the rays in a direction parallel to the direction of photoreceptor movement. The channel may be comprised of sides with reflective surfaces normal to the photoreceptive surface or may be a solid plastic sheet through which the rays pass. In the latter embodiment, rays are internally reflected from the surfaces of the plastic sheet.

Abstract: The lamphouse is useful for the production of prints on variable contrast material or on conventional photographic material. A first tungsten filament lamp is provided from which light passes through a first color selective waveband filter. Another tungsten filament lamp is provided from which light passes through a second color selective waveband filter.In the lamphouse there is a removable rectangular light box. The top of the box is covered with a light diffusing and reflecting material. The bottom of the box comprises a rectangular light diffusing screen. The light box has on each of the sides adjacent to the two lamps a light entry port. In the lamphouse there are also two guide members which are parallel to the plane of the screen in the light box and on or in which the two lamps and their filters, guide mounting means and optionally lamphouse abutment means are slideably mounted.

Abstract: A document illumination system adapted for use in a jet drop copier or duplicator. A pair of focussing reflectors collect illumination from two parallel line source illuminators and direct the collected illumination toward a pair of scanning mirrors. The scanning mirrors, together with a pair of side mirrors, direct narrow beams of illumination toward a common illuminated strip on the face of a document positioned on a flat document support member. The scanning mirrors are scanned in synchronism to move the illuminated strip back and forth along the face of the document, and the reflectors are concomitantly moved in synchronism to maintain an image of the illumination sources in one dimensional focus at the surface of the document. All motion of the scanning mirrors and the reflectors is produced by a single drive motor, which drives a set of interspersed timing belts to produce uniform rotary motion of the input shafts for four conjugate cam arrangements.

Abstract: A unitary optical element as provided together with a tubular light source and housing therearound to form an integrated optical assembly suitable for illuminating a line of a graphic original traversed across one surface of the assembly, such that an image of the illuminated line is formed on a photoreceptive surface traversed across another surface of the assembly. The optical element includes a linear array of optical fibers for conveying light reflected from the original onto the receptor surface, which fibers are optically coupled and integrally bonded to a light collection member such that light from the tubular source is directed onto the collection member and over into the sides of the fibers to emerge through the fiber end, thus directly illuminating a line on the original.

Abstract: A reproduction camera for producing screen modified images of an original copy suitable for subsequent use in the production of ink printed pictures features an objective lens spaced apart from a film holder located at the image plane of the objective by an extensible bellows. A light source providing the conventional priming (or bump) exposure used in processing screen modified images is arranged within the bellows closely adjacent the edge of the film holder surrounding the image plane. Light from the light source is directed toward the bellows so that only scattered light, which is thus evenly distributed, is received at the image plane. The light source is conveniently four separate lamps arranged generally at the corners of the bellows and the images of these lamps formed at the object plane of the objective helps in initially locating the original from which the screen modified image is to be made.

Abstract: Apparatus for duplicating microfiche, which is of moderate cost yet which operates rapidly to make duplicates of high quality from both jacketed and unjacketed microfiche. A relatively uniform and collimated light source is provided for use with jacketed microfiche, by utilizing a bank of fluorescent aperture lamps and a bank of cylindrical lenses between the lamps and microfiche, with the side of the lenses closest to the microfiche being flattened and with the lenses having baffles of lower index of refraction than the clear segments of the lenses. A developing station for holding gaseous ammonia or other developing medium, is sealed by an inflatable seal.

Abstract: An apparatus for photographically providing an exploded view of a plurality of parts to be assembled includes a plurality of support plates made of transparent material on which the plurality of parts to be photographed are located, light sources irradiating said plates and parts and a camera taking a photograph of said parts. In this case, the parts are so laid out on the support plates that they are not overlapped as viewed from the camera and the light sources are so disposed that the parts are irradiated by light therefrom all about the circumferences thereof.Further, a method for taking a photograph of parts by using the above apparatus is also disclosed.

Abstract: A light-diffuser for a photographic copier such as an enlarger incorporates a closely contacting parallel row of elongated glass rods held between a pair of tracks. The rods are preferably of heat-resistant glass of round cross section. An additional row of such rods may be disposed parallel to the first row and staggered therefrom to improve the diffusion of a beam of light passing through them.

Abstract: An illumination device used in the case of forming, on a dupe film, a visible copy of an image pattern of a master film. The illumination device comprises a light source including a center portion having a high brightness and a peripheral portion for emitting light in all directions, and a collimator lens having an optical axis that passes through the high brightness center portion of the light source.

Abstract: An illuminator including an internally reflecting light conduit and a light source to illuminate at least one of its ends. The longitudinal surface of the light conduit has a coating arranged in desired geometry to allow the escape of light from the conduit in accordance with the geometry to illuminate an object as desired. The coatings disclosed are a diffuse material to scatter light internally of the conduit, and a transparent material of refractive index greater than that of the conduit.

Abstract: A light source including a plurality of different individual lamps providing primary colors. A mirror which selectively reflects is associated with each lamp. The mirror reflects the corresponding primary color through a filter into a color mixing chamber which provides light having predetermined color composition. A photocell sensing system senses the light in the mixing chamber to provide electrical signals corresponding to the intensity of each color. The signals are employed in a color composition control system for controlling the intensity of the individual light lamps.

Abstract: A microfiche editing device for copying images contained in several microfiche frames on a first microfiche simultaneously onto a second at least partly unexposed microfiche; the device includes an array of illuminating means which can be selectively brought into use each to project light through a selected frame on the first microfiche so as to expose frames of the second microfiche placed in contact with the first microfiche; the illuminating means may include either a hinged mirror arrangement or a fibre optic arrangement which feed light into a collimating array of cells each of which correspond to a microfiche frame of the first microfiche.

Abstract: Illumination apparatus for electronic copying machines comprising a casing 1 having an elongated opening 5 extending in a longitudinal direction thereof wherein light sources 6 and 6' are disposed respectively at both ends of said casing 1, the inner surface of said casing 1 being formed as a diffusing reflection surface and a light screening plate 7 being provided so as to prevent direct emission of light through said opening 5 from said light sources 6 and 6'.

Abstract: A method for additive mixing of colors wherein different colored light beams are mixed after being reflected from a rotating reflecting device. An apparatus for additive color mixing comprising sources of different colored light beams with devices for controlling their intensity, a mixing chamber and a device for cooling the system wherein, in the mixing chamber and opposite the light sources there is provided a rotating reflection device secured on a shaft which is rotatable and which reflection device has cooling vanes or fins formed on its periphery.

Abstract: An exposure system for electrophotographic copiers, by which large originals such as engineering drawings can be exposed at high light intensity yet with the space requirement held to a minimum. The exposure is obtained by the provision of at least one tubular light source disposed parallel to a slit exposure zone at the side of that zone facing away from the image projection (optical) system and, at the side thereof facing toward the optical system, of tubular light sources disposed parallel to said zone in two equal groups arranged opposite to one another and adjacent to the reflection object space of the exposure system. The lamps of each of the two groups are closely spaced and have disposed closely about them a diffusely reflecting wall of a form generated by a straight line moving parallel to the lamps.

Abstract: An improved light source for a photographic printer uses a plurality of print lamps. A heatsink and blower dissipate heat generated by the print lamps. The light diffuser which diffuses light from the lamp includes a white porcelain diffuse reflector.

Abstract: In an image-reproducing system in which a number of beams scan over a record medium together and contribute to the formation of half-tone dots, an anamorphic system is included in the beam path to match the beam cross-section to the shape of mask apertures in the light paths and to compress the length of the line of beams, transverse to their direction.

Abstract: .[.A symmetrical light intensity distribution profile is achieved by placing a pair of similar asymmetrical linear DC gas discharge lamps in parallel position but opposed in polarity. The individual asymmetrical distributions of the lamps combine in a symmetrical total intensity distribution. A desired "butterfly" or other intensity distribution profile can be achieved..]. .Iadd.The invention relates to an illumination system which provides nonuniform illumination along an object plane in the dimension of an illumination source which includes two linear lamps. The lamps have their anodes and cathodes connected in reverse fashion relative to each other; each lamp provides its own asymmetrical light output distribution pattern but the resultant output of both lamps is a symmetrical pattern which provides the characteristic nonuniform illumination on the object plane. .Iaddend.