Abstract: The special effects filter for camera comprises a transparent support sliding on the camera body between at least two positions. The support is fitted with at least one zone capable of covering the lens and the viewfinder of the camera so that practically identical light transmission characteristics are respectively registered with the lens and the viewfinder.

Abstract: An illuminator for a high energy remote lighting system includes a light source for generating light energy and a selectively positionable light output modifying apparatus having a plurality of light output modifying elements, each element corresponding to a predetermined position of at least a portion of the apparatus. At least some of the light output modifying elements of the apparatus are configured to filter light energy to provide either dimmed or colored light. The illuminator can be implemented in a system having a plurality of area control panels, each control panel generating a control signal indicative of a corresponding light characteristic, the illuminators each being coupled to a corresponding one of the area control panels to receive the control signal and to output a particular type of light in response thereto.

Abstract: Apparatus for modifying a beam of light, comprising at least one set of blades moveable across the beam, wherein each set of blades is arranged into a first subset of blades and a second subset of blades, and wherein the respective subsets of blades are axially spaced from each other. The apparatus is particularly suitable in apparatus comprising a light source and means for directing and/or focusing the light, and may be embodied (a) in a color changer for changing the color of light in a light beam, (b) in a diaphragm for varying the aperture, and (c) in dimmer apparatus for dimming light beam.

Abstract: In an optical filter apparatus in which a filter loading disk having a plurality of filters is rotated around a rotation axis so as to position a desired filter onto an optical axis of a color separation prism, the filter loading disk and the rotation axis are unitedly formed, while the rotation axis is supported by a housing member disposed in front of and behind the disk, thereby reducing the number of parts to decrease the manufacturing cost of the apparatus while preventing the disk from fluctuating upon rotation. In a filter disk (8), a disk holding section (8A) holding a plurality of filters (9) and an axis section (8B) are unitedly formed, thereby reducing the number of parts. The axis section (8B) is supported by an axial hole (1A) and an axial hole (4A) of a dust cover (4) so as to increase the fitting length of the axis section (8B), thereby preventing the filter disk (8) from fluctuating upon rotation.

Abstract: A filter clamp for retaining a filter, comprising a frame having an aperture to accommodate the filter, a clamp member having a clamp opening for alignment with the aperture when the clamp is in a mounted position, and a connector having a plurality of openings spaced about the aperture of the frame and mating protrusions spaced about the clamp opening of the clamp member. At least two protrusions extend through their mating openings and have their free ends formed at an angle to the openings so as to retain the clamp member in a mounted position containing the filter between the periphery and the frame while allowing the clamp member to move laterally, longitudinally and upwardly in relation to the frame sufficient amounts to accommodate expansion and contraction of the filter.

Abstract: A controlling device of a tunable filter includes a base, a tunable filter on the base along an optical path between first and second optical fibers, a holder rotatably installed on the base to support the tunable filter, a driving unit installed on the base for providing a rotational force, a speed reducing device, and a rotating unit for rotating the holder in accordance with the linear movement of the movable member. The speed reducing device has a worm gear extending from a rotating shaft of the driving unit, and a movable member provided with a threaded hole engaged with the worm gear to allow reciprocal movement along the worm gear according to the rotation direction of the worm gear.

Abstract: The present invention relates to a rotary drum type optical filter apparatus, which comprises a filter unit for receiving an optical signal to spectralize the optical signal; a lens unit provided at the center of the filter unit for varying an optical path of the optical signal; and a driving device engaged with the filter unit for providing a displacement of the filter unit relative to the lens unit to obtain different spectrum colors of the optical signal.

Abstract: A light transmittance adjusting apparatus for adjusting a windowpane of an automobile or a building has a fixed member and a movable member arranged in parallel with each other and having a plurality of light interception sections and light transmission sections formed thereon alternately. The vertical position of the movable member are changed electrostatically relative to the fixed member to adjust the light transmittance of the windowpane. Each light interception section has a semi-interception region, the light transmittance of which decreases gradually from a center region thereof toward the adjacent light transmission section. The semi-interception region of the light interception section of a light interception plate of the fixed member overlap the semi-interception region of the light interception section of a light interception plate of the movable member, thus accomplishing an optical interception completely.

Abstract: Disclosed is an apparatus for mounting a lens filter on a camera. The apparatus includes a fixing plate which can rotate and slide according to the position of the accessory mounting groove of the camera and combines with the accessory mounting groove of the camera. An adjusting part adjusts the horizontal position of a filter according to the variation of the length of a camera lens. The adjusting part is slidably combined with the fixing plate. A filter holder assembly which is rotatably mounted on the adjusting part is included. The filter holder assembly receives a filter and adjusts the vertical position of the filter according to the vertical position of the camera lens. A picture can be taken irrespective of the position of the camera lens and the position of the accessory mounting groove. A circular filter and a rectangular filter can be used.

Abstract: Apparatus and method for radiometrically calibrating an imaging sensor array using the sun as a calibration light source in an optical system of the type having an accessible real conjugate of the entrance pupil, includes a flux concentrator for concentrating the sunlight. A flux modulator modulates the intensity of the concentrated sunlight and a flux relay for relaying the intensity modulated sunlight to the real conjugate of the entrance pupil of the optical system. A flux diffuser located at the real conjugate of the entrance pupil of the optical system illuminates the imaging sensor array with diffuse intensity modulated sunlight for calibrating the imaging sensor. A radiometric calibration assembly is proposed to calibrate an imaging sensor array of an earth imaging system. The calibration assembly comprises a flux concentrator, a flux modulator, a flux relay lens and a flux diffuser located within a conjugate pupil of the earth imaging system.

Abstract: A method for producing a luminous beam uses a chromatic element which can be shifted with respect to the beam axis. The chromatic element is arranged in a precise point inside the optical equipment for which the element is designed. The chromatic element or filter is arranged in an optical zone called the "pupil" and consists of plurality of circular sectors which are equal to each other, for instance each sector may occupy 120 degrees. The sectors each have different colors. The so-obtained filter is thus positioned in the pupil zone in such a way that the filter may be shifted orthogonally to the optical axis in order to choose and/or use or select an infinite range of colors or chromatic or luminous intensities.

Abstract: An apparatus, such as an optical equalizer, having variable wavelength characteristics. More specifically, the apparatus attenuates an input light, and includes a beam expander, a beam condenser and an attenuator positioned between the beam expander and the beam condenser. The beam expander converts the input light into a spectral beam propagating in a first direction and having wavelength components spatially separated in a second direction perpendicular to the first direction. The attenuator intersects the spectral beam and has a planer distribution of transmittance so that the spectral beam passes through the attenuator and is attenuated in accordance with the planer distribution of transmittance. The beam expander converts the attenuated spectral beam into an output light. The attenuator is movable in a plane which is not parallel to the first direction. For example, the attenuator can be movable in a plane which is substantially perpendicular to the first direction.

Abstract: A multi-wavelength optical filter for a portabe gas analyzer includes a filter assembly having a first opening and multiple additional openings. The first opening has a linearly variable filter disposed therein, while the additional openings have discrete filters disposed therein. The filters are linearly aligned, such that filter selection is facilitated by using the filter assembly with a linear positioning mechanism.

Abstract: A color changing device provides a continuously variable light color by means of the introduction of dichroic color filters into the light path of an illumination device. In the subtractive color mixing method for mixing of colors in an illumination apparatus according to the invention dichroic filters are provided parallel to each other and transverse to the beam path of the illumination apparatus, wherein the filters can be introduced into the beam path continuously and independently, so that a continuous mixing is achieved. At least four filters are used and wherein in view of the wavelength a broadband high-pass and a broadband low-pass, and two broadband band-stops are used, wherein the transmission regions of the two band-stops partly overlap so that with the filter combinations dominant colors with a high saturation can be generated.

Abstract: A tunable filter module which can automatically make the center wavelength in the passband coincident with the center wavelength of a signal light beam according to variations in wavelength of the signal light beam. The tunable filter module includes a beam splitting mechanism for splitting an incident signal light beam into a first beam undeviated, a second beam deflected to one side of the first beam; and a third beam deflected to another side of the first beam, and a multilayer film filter located so as to transmit the first, second, and third beams. A first photodetector is located so as to detect the second beam, and a second photodetector is located so as to detect the third beam. A comparator is connected to the first and second photodetectors to compare outputs from the first and second photodetectors and output a differential signal indicative of the difference between these outputs.

Abstract: A multi-lens optical device for use in an optical scanner including a lens holder having a viewing aperture, and a lens unit disposed in front of the viewing aperture, wherein the lens unit includes a lens holder, a plurality of lenses of different magnifying power respectively mounted on the lens holder, a reversible motor, and a reduction gearing driven by the reversible motor to move the lens holder, permitting one lens to be aligned with the viewing aperture for scanning.

Abstract: Apparatus for obtaining a desired tint, which apparatus uses a light source to provide a gamut of colours. The apparatus comprises wheel and paddle (34,60) which enable a tint to be obtained from such light in such a manner that the hue and saturation of the tint can be varied substantially independently of one another, whilst maintaining a given brightness. The invention extends to a method using such apparatus, and to equipment comprising a set of coloured filters, and also to a method in which a tint created by a combination of filters selected from a set of filters is varied, by removal, addition, or replacement of one or more filters of the combination, to match the selected tint, and finally to the making of lenses using such methods, and the lenses themselves.

Abstract: A light filter apparatus of an image scanning device is provided. The light filter apparatus is a frame of a spindle-like shape. The frame comprises a connecting sleeve at both ends and a plurality of axial-symmetrical sub-frames each of which accommodates a light filter film. The sub-frame has two inwardly converging ends connected with the connecting sleeves respectively. The sub-frame has a slot for receiving the light filter film.

Abstract: A rotary device of a projector includes a plate and a board engaged by extending a shaft of a motor engaged to a side of the board through a center of the board and the plate respectively, the board having an opening defined therein and the plate having a plurality of holes defined therein, the opening and each one of the holes coinciding with each other respectively when the plate is rotated about the shaft, the plate having a main gear fixedly engaged to the shaft and four ring elements extending transversely from the plate, each ring element having an inner periphery defining the corresponding hole and having a toothed portion defined in an outer portion thereof engaged to the main gear, a first one-way stop engaged to the plate, when a torque transmitted from the motor is less than the resistant force between the first one-way stop and the plate, each of the ring elements rotates while the plate is static, otherwise, the plate is rotated about the shaft while each of the ring elements is rotated therewith

Abstract: A light filter for dental use having a transparent planar member (12) which is colored so as to filter-out visible radiation in the range 400 nm to 520 nm, the range being that to which dental composite materials are sensitive, the filter being arranged to be fitted in front of a dental lamp by means of an attachment device (114) arranged to detachably secure the transparent planar member (12) to the dental lamp.

Abstract: Light processing apparatus creates visual effects with light from a light source. An input bundle of flexible fibre optic light guides receives light from the light source. A reconfiguration plate reconfigures the output ends of the light guides into a plurality of separated input zones of selected shape. A filter having colored areas shaped to correlate with the input zones filters the light. An output bundle of flexible fibre optic light guides distributes the light transmitted through the filter. A configuring plate configures the input ends of the output bundle of light guides into output zones which correlate with the input zones. The filter may be a rotatable color wheel or a computer-controlled liquid crystal display. When the filter is activated, the colored areas change colors, thereby creating various visual effects, such as painting with light.

Abstract: A color image reading apparatus comprises a plurality of line sensors which are a plurality of one-dimensional sensor arrays disposed on a single substrate, a projection optical system for projecting an image of a subject on the sensors, a blazed diffraction grating disposed in an optical path between the projection optical system and the sensors to separate light from the subject into a plurality of color lights, and a wavelength selection device disposed in an optical path between the subject and the sensors to permit only a beam of light within a specific wavelength range to pass therethrough.

Abstract: An automatic demonstration system for showing the effectiveness and advantage of a particular eye protection screen to be promoted includes an actuation device for moving the eye protection screen between a position for shielding a cathode ray tube (CRT) display and a position for exposing the CRT display under the control of a control device. An oscilloscope having a probe is provided to detect the intensity of electromagnetic radiation from the CRT display for the demonstration of the effectiveness of reducing the intensity of the radiation. An external light source is provided to project light onto the CRT display and/or the eye protection screen for the demonstration of the effectiveness of eliminating light reflection from the CRT display screen.

Abstract: A plurality of darkness distributions having a predetermined relationship with a darkness distribution for ND-filtering transmission light at the position of an aperture blade in an aperture device are formed on an original. The original is photographed on a film by a camera, and after the film is developed, the film is molded to obtain a plurality of ND filters.

Abstract: A color filter moving apparatus for moving a color filter comprising a base and a filter frame. The base is provided with (1) a side flange integrally formed on a lateral side of the base; (2) a motor mounted on a lateral wall of the side flange, the motor having an axle penetrating through the lateral wall so as to allow a gear to be attached thereto; and (3) two protrudent flanges formed on the two ends, respectively, of the base, each protrudent flange having a stud opening. The filter frame is provided with (1) a side wall, a bottom, and a top wall, the top wall having an outer face and an inner face; (2) at least one frame rack formed on the side wall of the filter frame for holding a color filter; and (3) a gear track formed on the inner face of the top wall engageable with the gear attached to the axle of the motor.

Abstract: An apparatus for producing a substantially monochromatic light beam for chromotherapy and/or actinotherapy is disclosed ; the apparatus comprises a transportable housing including a light source, which housing includes a movable heterogeneous interference filter mounted on a support that is displaceable by means of a motor, said apparatus further including a wand enabling said light beam to be directed onto a zone to be treated, and said apparatus also including transmission means for conveying said light beam from said housing to said wand, said housing including an infrared filter interposed between said light source and said interference filter.

Abstract: A color cross-fading system for a luminaire includes two filter disks or strips each provided with a multi-layer filter coating to provide a dichroic filter effect. In each case the thickness of the coating layers varies continuous along a gradient axis of the filter disk or strips. One disk acts predominantly as a long wave pass filter and the other act predominantly as a short wave pass filter, but each disk has an essentially "complex" characteristic enabling a very wide range of different colors to be obtained by cumulative subtractive filtering, by varying the positions of the two disks or strips relative to an optical axis.

Abstract: An infrared-rejecting device is positioned in a light path and tilted thereto to reflect infrared radiation and to prevent infrared radiation from being applied to a photodetector or a line sensor for preventing the photodetector or the line sensor from operating in error or from suffering a reduction in its resolution. The infrared-rejecting device may be positioned out of the light path to allow light applied to the photodetector or the line sensor to remain unattenuated, i.e., to prevent the light applied to the photodetector or the line sensor from being reduced in intensity.

Abstract: A color filter assembly having a color filter wheel revolvably mounted within a hole on a slide being reciprocated in a track, for the filtration of the light of a stage lighting through at least one lens thereof. In one embodiment of the invention, the color filter wheel has a single lens, which has a plurality of refracting edges for refracting light in different directions. In another embodiment of the invention, the color filter wheel has a plurality of lens mounts meshed with one another to hold a respective color filter lens and turned by a motor drive to respectively filtrate a specific color from the light of the stage lighting.

Abstract: A gobo holder for a lighting system is provided which includes a housing for removably receiving a gobo therewithin, the housing having first and second ends and being positioned in the beam of light such that light enters the housing through the first end, passes through the gobo and exits the housing through the second end, a support on the housing for supporting the gobo in the housing, the support being positioned such that the beam of light passing through the gobo is unobstructed by the support, and a spring retainer supported by the housing and in contact with and resiliently biasing the gobo into contact with the support, the spring retainer being positioned such that the beam of light passing through the gobo is unobstructed by the spring retainer. The gobo holder is particularly advantageous in that it is capable of securely retaining gobos of various thicknesses in position during use while permitting easy and quick replacement of the gobos during lighting operations.

Abstract: A tapered-shaped rotatable frame with at least three filter windows, with at least three filters installed on it, a lens stand which includes a supporting means to rotatably support the frame. The angle between the supporting means and the frame's surface is supplementary to the angle between the supporting means and the frontal surface of the lens.

Abstract: An image scanning apparatus which can reduce a shading distortion generated by luminous characteristics of a light source, vignetting of a lens, etc. adopts color filters having a geometrical structure which enables to counterbalance a shading distortion and is characterized in that a line sensor is vertically arranged for the radial direction of the rotary filter. The image scanning apparatus can accomplish a simple shading calibration by arranging color filters and the line sensor so that a shading distortion is calibrated geometrically.

Abstract: An apparatus for generating a spectral distribution. This apparatus contains a light source and a single filter. The single filter is comprised of a color correcting filter material and a neutral density filter material. When the apparatus is adjusted, the spectral distribution of the light which passes through it varies continuously, but the brightness and/or irradiance of such light is substantially constant.

Abstract: A color correction structure for a color imaging device in which a document is scanned in a predetermined direction by a slit exposure light. A light reflected on the document is lead to a photoconductive member along an optical path, and an image of the document is focused on the photoconductive member by a focusing lens which is arranged in the optical path. The color correction structure is provided with a plurality of filter members each transmitting reflected light having a predetermined wavelength, and at least one actuator for actuating the filter members in a direction substantially perpendicular to an extending direction of the slit exposure light, between a first position where the filter members are retracted from the light path and a second position where the filter members interferes with the light path. A controller controls the actuator for brightness and hue adjustments.

Abstract: This invention concerns a fundus camera which can take photographs other than by fluorescence or by fluorescence. An optical device is withdrawn from the optical path of a photographic system at the same time as a barrier filter for taking photographs by fluorescence is inserted and is inserted in the optical path of the photographic system for observation purposes at the same time as the barrier filter is removed. The optical device has the same optical path length as the barrier filter, and thus a focused fundus image attained during observation is not upset when fluorescent photographs are taken.

Abstract: An apparatus for generating a spectral distribution. This apparatus contains a light source and a single filter. The single filter is comprised of a color correcting filter material and a neutral density filter material. When the apparatus is adjusted, the spectral distribution of the light which passes through it varies continuously, but the brightness and/or irradiance of such light is substantially constant.

Abstract: A color separation system is disclosed consisted of a mounting frame, a color filter assembly, and a step motor controlled to move the color filter assembly back and forth in a channel. The color filter assembly is consisted of a filter holder frame, a cover frame fastened to the filter holder frame through doweled joints, a series of color filter lenses retained in windows between the filter holder frame and the cover frame, a rack meshed with a gear on the output shaft of the step motor, and top and bottom projecting rods respectively inserted in top and bottom guide slots on the mounting frame.

Abstract: A particulate obscurant disseminator couples the shaft power of the host vehicle through a clutch and fluid coupling to a high ratio gear box whose output shaft drives a compressor of an automative-type turbocharger whose air output is fed to the input of a venturi type ejector where additional air flow is induced and mixed with pariculate from a bin supply to form an obscurant cloud.

Abstract: A filter conversion device is employed in an optical system that is operative to locate one of a plurality of color filter units in an optical path frame member and is provided to support a plurality of filter units and is arranged so as to be movable in a predetermined plane between a light sending element and a light receiving element. Mechanisms for controlling the frame member to move horizontally and vertically in the plane are also provided. Thus, the desired filter unit is located in the optical path without requiring a large space for movement.

Abstract: A color filter assembly driver using a microprocessor to control a motor drive in driving a color filter assembly through a step motor and to compare feedback signal of the color filter assembly with a synchronizing signal permitting compared result to be calculated, so as to change the exciting cycle and time of the step motor according to calculation result. The microprocessor also controls the motor drive to change the single phase or two-phase exciting mode of the step motor so that the step motor is controlled to rotate at high or low revolving speed.

Abstract: A first optical attenuation filter is arranged in a predetermined optical path and attenuates light to be attenuated with a first variable attenuation amount. A second optical attenuation filter is arranged in the predetermined optical path and attenuates, with a second variable attenuation amount, the light which has been transmitted through the first optical attenuation filter. The first and second optical attenuation filters can be driven in the forward and reverse directions and each has an attenuation amount characteristic which changes monotonously in both the forward and reverse directions. An attenuation amount setting section sets a desired attenuation amount to the light to be attenuated. First and second drivers are coupled to drive the first and second optical attenuation filters in the forward and reverse directions, respectively.

Abstract: Apparatus for positioning apertures in a beam of light including a plurality of drive members coaxially supported on a longitudinally extending shaft, each having a separate electrically operable drive motor mechanically interlocked therewith.

Abstract: An optical fiber illuminator display, uses a color filter light source assembly having a color filter cylinder rotated by a motor and a light source to project light through the color filters on the color filter wheel; a display board having patterns formed of holes; and a bunched optical fiber set held by a holder in front of the color filter wheel to transmit color light to the patterns on the display board, and wherein the bunched optical fiber set consists of a plurality of bus wires, the bus wires each being constituted of a plurality of optical fiber filaments arranged in a row, the optical fiber filaments each having one end fastened in the holder and an opposite end respectively inserted in the holes on the display board.

Abstract: A radiation aperture system where two sets of apertures are distributed in ring sections of like radius on two parallel rings. As one ring is rotated with respect to its counterpart, one aperture of each ring will align to pass a radiation beam through both apertures. Only a single aperture pair is formed at each unique time, allowing sequential measurements of all combinations of both aperture openings during rotation without halting the rotation.

Abstract: An exposure apparatus includes a light source for exposing a wafer through a mask; a light blocking device being movable and effective to block light from the light source to limit an exposure zone; a positional deviation detecting system for detecting positional deviation between the mask and the wafer; and a drive control system for moving the light blocking device to execute position control therefor, on the basis of a detection signal from the positional deviation detecting system.

Abstract: A curvilinear motion type optical filter driving mechanism, comprising a lens-house, a filter holder, a motor, a driven gear, and a driving gear. The filter holder has an optical filter mounted thereon at the front and disposed in a curvilinear direction, and a rack at the back. Rotating the motor causes the drive gear to carry the optical filter, via the driven gear and the rack, to make a curvilinear motion over the lens of the lens-house.

Abstract: A color changer (20) comprising a component hue saturation filter (30) including an elongated flexible substrate (32) having a surface with a gradient axis (GA) and which includes a graded portion (G) supporting a uniform concentration of a selected hue filtering material (50) distributed in a continuously graded average density in beam-size areas around points along the gradient axis. The component hue saturation filters may be embodied in separate substrates positionable in parallel planes to be intersected serially by a beam of light. Alternately, dual-hue filters (68) may be formed by two primary hue component filters embodied in respective substrates each also embodying duplicate third primary hue component filters producing the same effects. Saturations of each selected hue of light appear evenly distributed in the output beam without the need for color components to be further commingled.

Abstract: A filter lens device for an optical color scanner comprising a lens, at least three filters and a driving member to drive the filters to line up with scanned data and optical detectors wherein an entire document is scanned completely for each color to be reproduced. A position detecting member detects the relative positions between the filters and optical detectors, a position controlling member controlling the driving member such that the filters are moved in sequence to scan the document.

Abstract: A positioning wheel resiliently engages and moves an optical element to a selected position within a channel of a holder mounted in front of a camera lens. A brake mechanism prevents the optical element from accidentally falling out of the channel. A handle-operated camming mechanism provides for a quick lock/unlock interlock of a rotary holder in a desired angular orientation.

Abstract: This invention discloses an improvement of a filter apparatus for cameras and particularly discloses various arrangements for improving the filter apparatus for cameras in which, for example, an operating means for placing a filter in and taking it out of the optical path is provided so that the operating means automatically removes the filter from the optical path by stopping the operations of filter photography at the completion thereof. Thus, a photograph can be prevented from mistakenly being taken with the filter still in place in the optical path, and protective means for preventing damage of the filter surface is provided on the filter.