Abstract: A security monitoring system includes a radio transmitter which transmits information by a radio signal and a processing apparatus which receives the information transmitted by the radio transmitter to give necessary processing depending upon the contents of the information. The radio transmitter has a testing signal transmission means for transmitting testing signals and a setting means for setting the transmission level in transmitting the testing signal to the lowest operating level to provide a simulated worst-case testing environment.

Abstract: An identification device in the form of a tag-like strip, affixable to an article, for use in an electronic security system comprising opposingly situated conductor strip portions which may be punched out of a metal foil. The conductor strip portions are folded together along suitably positioned fold lines so that mutually superposed conductor strip portions form an uninterrupted winding of inductive elements having a dielectric positioned therebetween. The conductor strip portions can be fabricated on continuous roll and separated by transverse perforations.

Abstract: The collar consists of two legs pivoted to each other at one end by a hinge member and releasably locked to each other at the other end by a key operated lock. The legs are made of shear-resistant material. A radio signal generating and transmitting device and autonomous power supply are housed within the collar. A trigger switch is closed to activate the device upon opening of a flap by the abducted collar wearer, and circuitry including a silicon controlled rectifier, causes activation of the transmitter and characterized by the impossibility of deactivation thereof, short of complete discharge of the power supply, as long as the lock locks the legs of the collar around the wrist, neck or ankle of the wearer.

Abstract: The combination is described of an electrical smoke, heat detector and electrical light in a single unit which is removably attachable to an electrical fixture. The combination includes a closed housing containing smoke heat sensing alarms. Also recessed flush within the housing is a light bulb socket for reception of a light bulb into a face of the housing. Protruding from an opposite face of the housing is an electrical connector, capable of screw-in attachment to a standard electrical outlet fixture. A switching device to turn the light on or off, forms of which include: push button, toggle switch, or pull chain, is installed within the closed housing such that the switch is operable externally of the housing. A second switching device, also operable externally of the housing activates and de-activates a self-contained battery power source to operate the smoke and heat sensor functions of the combination.

Abstract: An apparatus and method are disclosed which permit selection of colors for display, and easy modification of displayed colors. The apparatus includes a microprocessor, a ROM with a stored program, a RAM with midifiable color data a CRT display for displaying color images, and a keyboard with a cursor-positioning key for identifying a pixel of a displayed color image, and a color menu and H (hue), L (lightness), S (saturation) color modification keys. In response to actuation of one or more of the color modification keys, the microprocessor, under control of the stored program, modifies the stored color data, and uses the modified color data to control the color guns (red, green, blue) of the CRT to modify the color of the identified pixel.

Abstract: Active matrix display screen without intersections of the addressing row and column conductors.The display screen comprises a material with modifiable optical characteristics placed between a first wall and a second transparent wall. On the first wall is formed a matrix of elements, each comprising a switching element constituted by a thin film transistor and an electrode and on which there is also a group of row conductors. The other wall carries a group of column electrodes and a group of column conductors.Application to liquid crystal display screen.

Abstract: A multiwindow display circuit comprises a horizontal boundary memory for storing horizontal boundary data of display windows, a vertical boundary memory for storing vertical boundary data of the display windows, a display address memory for storing an address of each of the display windows, a picture information memory for storing picture information related to the address stored within the display address memory, a bias value memory for storing bias values for the display windows, an address converter for adding a selected one of the bias values to the address of the display address memory to convert the display address, a window select circuit for selecting a single window from among the display windows, a display timing controller for changing a code representative of the single window, and a display responsive to the display timing controller for displaying any portion of the picture information memory in any area of the display.

Abstract: A display member (10) comprising a housing (14) having a chamber (12)with a viewing face (16) and a lamina member (24) movably mounted within said chamber (12) to be movable into a first position in which one face (26) of the member (22) in face to face contact with said viewing face (16) and a second position in which the one face (26) of the member (24) is out of contact with the viewing face (16) and the other face (25) is in face to face with a rear face (15) of the chamber (12) spaced rearwardly from the viewing face (16), drive means (22, 20) being provided to produce an attractive and/or repulsive force between said housing (14) and said member (24) to move said member (24) from said first or second position to the other position wherein no external drive means need be provided to maintain said member (24) in said first or second position, an opaque fluid filling said chamber.

Abstract: Readiness for operation of laser medical instruments or of flash generators for ophthalmological instruments is indicated in such a way that the readiness signal is perceptible only to the physician and not to the patient being operated upon. There is a mini-earphone to be worn in an ear of the physician. The conventional readiness signal, if of the optical kind, is converted to an audible signal delivered to the earphone of the physician. A photodiode responsive to the optical signal is part of the conversion system, which also includes an audiogenerator and an amplifier. If the conventional readiness signal is of the audible kind, the loudspeaker is rendered inoperative and a sound signal is produced in the earphone.

Abstract: A transmission device comprises a transmitter and at least one receiver delivering a clock signal and a synchronization signal to circuits connected on the output side of the receiver. Each receiver is connected to the transmitter either directly or through a group of repeaters. The transmitter comprises a clock, a synchronization circuit connected to a selector circuit and a flip-flop the output of which is looped back to an input through the intermediary of a delay circuit and the selector circuit. The flip-flop has an output connected to an inverter which delivers a clock signal accompanied by a synchronization signal. A repeater comprises a test circuit, a synchronization circuit, a flip-flop, a delay circuit and a selector circuit. A receiver comprises a test circuit, a restore circuit, a detector circuit and a synchronization and divider circuit.

Abstract: A novel method for receiving a numerical call signal which comprises assigning a certain call number to a specified person; transmitting an electromagnetic wave carrying the call number as the number of impulse; receiving the electromagnetic wave with a receiver, more particularly, a portable receiver; decoding the electromagnetic wave into low-frequency impulses of the number corresponding to the call number; and driving an alarm with the low-frequency impulses to call out the specified person.

Abstract: A data transmission system comprises a transmitter and a plurality of serially connected receivers. The transmitter, when energized, outputs an initialization signal to all of the receivers and also outputs a data of a predetermined value to the first receiver. In response to the initialization signal, the first receiver stores the received data in a register and modifies the received data to output a modified data to the second receiver. The second to last receivers operate in the same manner, so that different data are stored in the respective registers of the receivers. To transmit a given data to a selected one of the receivers, the transmitter outputs the given data with an identification code equal to the data stored in the register of the selected receiver. Although each of the receivers compares the received identification code with the contents of the register, only the selected receiver outputs a coincidence signal and stores the received data into a data utilization circuit thereof.

Abstract: A network system including a data transmission line through which a serial data is transmitted, a synchronous signal line through which a synchronous signal transmission for controlling a transfer of the serial data is transmitted, and a plurality of data stations connected to both the signal transmission line and synchronous signal transmission line, each one of the data stations transferring the serial data to any of the other data stations in accordance with the synchronous signal, wherein a period over which the serial data is transmitted to the data signal transmission line is varied according to a length of the serial data.

Abstract: The driver, in trying to manage the directional control of his vehicle, is often seen rotating his head or torso beyond 90 degrees (past perpendicular) in an effort to gain intelligence about what competing vehicles are flanking his "blindsides." Such a competing vehicle may occupy that area in the "blindside" (left, right or both sides past perpendicular) not directly observable through the rear view mirror. The requirement to make an extraordinary inspection of the vehicle "blindside" is often exacerbated by the poor design utility of the vehicle itself. Those who are physically unable to check the "blindspot" (such as the elderly) knowingly risk collision. The instant invention is the first high-technology effort to address a solution to this problem. A sequentially operating dual sensor technology is used. The first sensor effort takes place as a photonic event.

Abstract: An apparatus capable of sensing sudden approach of a succeeding vehicle and emitting an alarm, while being free from malfunction that may otherwise be caused by the noise from the succeeding vehicle which has approached at a normal speed and stopped in the proximity.

Abstract: The conventional way of achieving an identification, friend or foe (IFF) function for a moveable subject requires the subject to carry a transponder that emits a coded return when a radar pulse is received by its receiver. In the present invention, an IFF system is disclosed which departs from the conventional transponder method and employs no radio-frequency power source. Instead, it uses the scattering or reflecting properties of an antenna to modulate, in a distinctive manner, the radar return from a moveable subject. A binary sequence code generator modulates the impedance of a receiver antenna, with the reflected signal being detected and correlated with a synchronized code sequence at the radar.

Abstract: An adaptive, fail-soft digital filterbank for digitized Doppler-modulated video signals. A plurality of modules are controlled by the impulse filter weighting technique to each respond to a set of discrete Doppler frequencies. A built-in test feature is included, the module inputs being multiplexed between system digitized video and synthetic signals to continuously confirm proper operation. Module failures are recognized by the control (programming) circuitry and spare modules can be activated. Control and communications link circuitry is constructed with multiple redundancy.

Abstract: A scan oscillator and a Pulse Repetition Frequency (PRF) oscillator with associated analog and digital circuits provide drive signals for two different RF PIN diode attenuators. When driven by a portable Gunn Diode Oscillator or other microwave source RF is generated that provides main lobe and adjustable side lobe radar signals to a directional microwave antenna. This output signal has adjustable scan rate, beam width, PRF, pulse width, and side lobe level and is self-contained in a package measuring 83/8.times.73/8.times.3 inches. The system allows "on the sail" testing for periscope mounted Direction Finding Systems.

Abstract: In a side looking radar, electronic timing circuits for dividing the radar beam into a plurality of groups of azimuth cells of equal size, the switching circuits being dependent upon the number of pulse repetition intervals per unit of travel to maintain the size of the azimuth cells in the different groups relatively constant. The apparatus also contains circuitry for scaling the output in each of the different azimuth groups.

Abstract: A flat antenna particularly suited for mounting to a briefcase as part of a cellular telephone. The antenna has a radiator conductor and ground-plane conductor spaced from each other and mounted at right angles on an insulating support, preferably cardboard. The cardboard also serves as a mounting structure for a cable having two conductors, one soldered to the ground-plane conductor and a second soldered to the radiator. The flat structure is mounted in a panel of a carrying case and the cable is routed to a suitable transceiver.

Abstract: A method of increasing the water fastness and print quality of an ink employed in ink-jet printers is provided. The method involves providing a reactive species that reacts with a component in the substrate (i.e., paper) to form a polymer that binds the dye in the ink to the polymeric lattice. Alternatively, a separate reactive component may be deposited on the substrate on the same location as the reactive species which causes a polymeric reaction to occur. In this case, the ink may be in one or the other or both reactive components. An ink-jet printer having indexed orifices permits registration of deposited droplets of ink and reactive species to form the desired product.

Abstract: In printing images, desired portions of surface of ink are risen by utilizing electrostatic force (Coulomb force), whereby the ink is transferred onto a printing medium placed adjacent to the ink surface. In order to rise the desired portions of the ink level, a printing apparatus has such construction that a plurality of printing electrodes are provided in such a way that the end portions thereof are positioned slightly below the ink surface level, while an auxiliary electrode is disposed opposite to the printing electrodes over the ink surface.

Abstract: A device for recording directly the strain or distortion of a structural space as caused by an earthquake. Two similar light, flat rigid A-frame-like members are attached to points near the floor and ceiling, e.g., of a room, with their apex portions facing each other and overlapping. A displacement recorder is mounted in the overlap region. Earthquake distortion or strain in buildings occurs commonly as relative lateral displacement between a floor and a ceiling; the A-frame members transmit such displacement directly to the recorder. The installation may lie flat against a wall and be enclosed by a shallow cover.

Abstract: The present invention relates to polychromatic thermal printer of transferring type designed to print with any color selected from monochromic colors and mixed colors on a recording medium by arranging printably on said recording medium a plurality of ink ribbons having different colors to each other and received in a plurality of different cassette ribbons and by actuating selected thermal head from a plurality of thermal heads incorporating a plurality of separated heaters capable to be actuated selectively.

Abstract: A liquid jet recording head comprises a liquid discharging portion having an orifice for discharging liquid to form liquid droplets and a heat acting zone communicated with said orifice at which heat energy for forming flying liquid droplets acts on the liquid, and an electrothermal transducer, having at least a pair of confronting electrodes connected electrically to a heat generating resistance layer provided on a substrate thereby to form a heat generating portion between these electrodes, which includes a protecting layer which is formed by modification of the surfaces of said electrodes and is made into an insulating inorganic material.

Abstract: A recording device comprises a plurality of ink-jet recording units arranged separately from each other and an ink reservoir to supply an ink commonly to the recording units.

Abstract: This application discloses a thermal ink jet printhead and method of manufacture featuring an improved all-metal orifice plate and barrier layer assembly. This assembly includes constricted ink flow ports to reduce cavitation damage and smooth contoured convergent ink ejection orifices to prevent "gulping" of air during an ink ejection process. Both of these features extend the maximum operating frequency, fmax, of the printhead. The nickle barrier layer and the underlying thin film resistor substrate are gold plated and then soldered together to form a good strong solder bond at the substrate-barrier layer interface.

Abstract: A method and apparatus of electrophotography used for a printer or a copying machine, wherein a toner having no photoconductivity is applied on a surface of a photoconductive layer of a photoreceptor consisting of a transparent conductive layer and the photoconductive layer which are sequentially formed on a transparent substrate. The photoconductive layer is exposed from a side of the transparent substrate. Toner particles on an exposed region of the photoconductive layer are transferred to toner-receiving paper opposite the photoconductive layer so as to form a toner image. A process for developing a latent image can be omitted. In addition, a special toner such as a photoconductive toner having low sensitivity is not used, thereby forming a high-quality image.

Abstract: A light-emitting diode, and corresponding method for its fabrication, in which a blocking layer is used for current confinement, and a rectangular light emission pattern is employed, to avoid an isotropic effects when material systems such as indium phosphide are used. A critical step in the method of the invention is etching an opening through the blocking layer. The opening has its sides precisely oriented at forty-five degrees with respect to the cleavage planes of the substrate, to avoid exposing any crystal planes that are anisotropic.

Abstract: A non-single-crystal semiconductor light emitting device comprising a first non-single-crystal semiconductor layer of a first conductivity type; a non-single-crystal semiconductor intrinsic region formed in layers on the first non-single-crystal semiconductor layer; a second non-single-crystal semiconductor layer of a second conductivity type reverse from the first conductivity type formed on said non-single-crystal semiconductor intrinsic region; wherein the intrinsic region is formed by a non-single-crystal semiconductor laminate member made up of a plurality m(where m.gtoreq.3) of third non-single-crystal semiconductors layers M.sub.1, M.sub.2 . . . and M.sub.m sequentially laminate in this order, and wherein the energy gaps Eg.sub.1, Eg.sub.2, . . . and Eg.sub.m of the third non-single-crystal semiconductor layers bear such relationships as Eg.sub.1 >Eg.sub.2 <Eg.sub.3, Eg.sub.3 >Eg.sub.4 <Eg.sub.5, . . . Eg.sub.(m-2) >Eg.sub.(m-1) <Eg.sub.m.

Abstract: An insulated gate field effect transistor having a minority carrier diode and a majority carrier diode formed in the drain region. The minority diode modulates the resistance of the drain while the majority diode decreases sensitivity to latch up. Alternatively, a minority diode only is formed in the drain and separated from the drain contact and source by the body and body contact. An improved SCR is formed using the two diode structures as the fourth layer. An improved diode can also be formed having both low turn-on and low series resistance.

Abstract: A semiconductor device in which a capacitor of a switched-capacitor included in an RC network for defining the rise time of a programming high-voltage pulse signal of an EEPROM is formed of an oxide film having a thickness corresponding to the thickness of a tunnel oxide film or an oxide film between a floating gate and a control gate so that a shift amount of a threshold voltage of a memory transistor is made constant even if the thickness of the tunnel oxide film or the oxide film between the floating gate and the control gate is deviated from a designed value.

Abstract: A semiconductor device comprises a semiconductor circuit of CMOS type and an overvoltage protective circuit integrated therewith. The CMOS circuit and the overvoltage protective circuit are formed in one and the same substrate. The device has a contact electrically connected to the substrate. The CMOS circuit has a plurality of inputs. Between each input and the contact connected to the substrate, there is formed and connected in antiparallel a thyristor and a diode. Each thyristor has a firing circuit for ignition of the thyristor at a voltage level which is internally predetermined by the overvoltage protective circuit. In this way, an overvoltage occurring between an arbitrary pair of inputs will cause ignition of the thyristors of the overvoltage protective circuit and short-circuit of the inputs, which efficiently protects the CMOS circuit against overvoltages.

Abstract: The present invention relates to a multilinear charge transfer array having N rows of P detectors, each row successively receiving the radiation to be detected, an interface connecting the detectors to a group of charge transfer shift registers constituted by a first register with parallel inputs and series outputs having N.times.P stages separated into groups of N stages, in which each stage is connected to a detector of the same position of different rows, said register effecting the time delay and summation of the information and by a second register with parallel inputs and series outputs with N.times.P stages, communicating with the first register every N stages, the second register transferring the summated charges to a reading stage giving at the output solely a signal corresponding to the sum of the information collected on the detectors occupying the same position on the various rows.

Abstract: A solid-state imaging device having a scanning circuit and a photoconductive film formed in layers on a semiconductor substrate, and a process for forming the same, wherein high resolution with substantially no color mixing is attained. An electrode layer is formed over the semiconductor substrate for providing the plural electrodes, and a photoconductive film is formed over the electrode layer. A first transparent electrode is produced over the photoconductive film, after which a resist pattern is formed on the first transparent electrode layer corresponding to the pixels. The first transparent layer and the photoconductive film are etched according to the resist pattern to spatially isolate adjacent pixels in the first transparent layer and the photoconductive film. Adjacent pixels are isolated by etching, using the resist pattern, that part of the electrode layer on which are disposed the first transparent electrode layer and the photoconductive film between isolated pixels.

Abstract: A structure having a sawtooth graded bandgap region between two layers having the same conductivity type is useful as a photodetector.

Abstract: A planar type thyristor has a semiconductor substrate of one conductivity type, a first and second regions of other conductivity type formed in the substrate and a third region of the one conductivity type formed in one of the first and second regions. An electrically floating electrode is formed on the substrate between the first and second region via an insulator film and a control electrode is formed on the floating electrode via another insulator film. A gate trigger current is controlled by a voltage applied to the control electrode.

Abstract: A semiconductor integrated circuit having a multiple-layered connection comprises a semiconductor substrate (11), having circuit elements (Tr1, Tr2, Tr3, R1, R2, R3, R4) formed in a first region (16) of the surface of the substrate (11). A first insulating layer (12) is formed to cover the surface of the substrate (11) and, a first electrode layer (13) is formed on the first insulating film (12) to include a first portion of connection runs (13') extending in parallel in the first region (16) for connection to the circuit elements and a second portion of connection runs (13") in a second region (17).

Abstract: A semiconductor integrated circuit device incorporating bipolar transistors and IILs comprises respective buried layers in a substrate and active regions. A buried layer formed in the IIL region has a larger Gummel number than that of a buried layer formed in the bipolar transistor region so that a leakage current to the substrate is prevented. A larger Gummel number of the buried layer is accomplished by increasing the impurity concentration or the thickness of the layer. The device structure allows an enhanced circuit packing density, while suppressing a leakage current to the substrate.

Abstract: A common insulation plate is provided on a heat-discharging support member, and a plurality of press-packed semiconductor elements is provided on the common insulation plate. These semiconductor elements are coupled to electrodes which form a common electrode by a plurality of spring mechanisms. An internal connection terminal is slidably provided at each of the electrodes and is bent perpendicular to a pressing surface. Each of the internal connection terminals faces the adjacent one. After the electrodes are pressed against the respective semiconductor elements with adjustment, the internal connection terminals are electrically coupled together.

Abstract: A semiconductor stack is composed of a GTO thyristor, cooling members and wiring conductors which are stacked and tightened together. The semiconductor stack is disposed horizontally in a cooling vessel, and the vessel is filled with a Freon liquid. A condenser is disposed above the cooling vessel and is connected to the cooling vessel by a communication tube, to constitute a cooling apparatus. Each cooling member has a large number of small holes between the GTO thyristor and the wiring conductors between which the cooling member is disposed. The Freon is boiled in the small holes by the heat generated at the GTO thyristor, becomes Freon vapor, and is directed toward the corresponding wiring conductor. Each wiring conductor has a large number of longitudinal slits on the surface thereof which is in contact with the cooling member. The Freon vapor is made to flow upward along these slits by convection currents, thereby increasing the efficiency of the cooling cycle provided by the liquid Freon refrigerant.

Abstract: A circuit for use with a vectorscope to indicate SC/H phase of a composite video signal comprises an oscillator for generating a continuous wave signal at subcarrier frequency and having its phase locked to the horizontal sync point of the video signal, and a switch for connection between the output terminal of the filter of the vectorscope and the second inputs of the demodulators of the vectorscope and for connection also to the oscillator, for alternately connecting the subcarrier burst from the filter of the vectorscope and the sync locked continuous wave from the oscillator to the demodulators.

Abstract: An interface circuit is provided which permits a color-television receiver with digital signal-processing circuitry which reproduces the video signal at twice the horizontal frequency to be connected to a home computer whose clock-signal system is not synchronized with that of the color-television receiver. For each color character signal, the interface circuit contains two digital delay lines, one data register, two code converters, one line memory, and one multiple switch.

Abstract: A digital television receiver includes a first phase locked loop which develops a sampling clock signal that is locked to the horizontal line synchronizing signals components of a composite video signal. A second digital phase locked loop is clocked by the sampling clock signal and develops a digital signal that is phase locked to the color burst signal. This signal is used as a regenerated color subcarrier signal to synchronously demodulate the chrominance components of the composite video signal into I and Q color difference signals. To compensate for frequency instabilities in the regenerated subcarrier signal caused by frequency instabilities in the line-locked clock signal, a third digital phase locked loop develops an oscillatory signal which is phase locked to a reference signal generated by a crystal controlled oscillator. Control signals from the third phase locked loop are applied to circuitry which develops control signal that is independent of the crystal frequency.

Abstract: A digital television receiver includes a first phase locked loop which develops a sampling clock signal that is locked to the horizontal line synchronizing signal components of a composite video signal. A second digital phase locked loop is clocked by the sampling clock signal and develops a digital signal that is phase locked to the color burst signal. This digital signal is used as a regenerated color subcarrier signal to synchronously demodulate the chrominance components of the composite video signals into I and Q color difference signals. To compensate for frequency instability in the regenerated subcarrier signal caused by frequency instabilities in the line-locked clock signal, a third digital phase locked loop develops an output signal which is phase locked to a reference signal generated by a crystal controlled oscillator.

Abstract: A television (TV) system having provision for automatically compensating for signal distortion which would cause artifacts at the point where high- and low-resolution portions of an extended aspect ratio, high-definition TV display are joined together. Compensation parameters are calculated at the TV receiver in response to a known test pattern transmitted during the vertical retrace interval of the TV display and then accessed and utilized to compensate received active display signals. The compensation parameters are calculated by first converting Y, I, and Q signals for the test pattern into digital samples and then processing these digital samples in a digital signal processor unit. After the compensation parameters have been calculated by the digital signal processor, they are stored in a memory. The received active display signals are compensated by accessing the stored compensation parameters during the active display time.

Abstract: In a scene-by-scene color corrector, automatic color correction circuitry produces color correction signals which are stored and utilized in preparing color-corrected video tape. Preferably, the automatic correction circuit tests only a pre-selected portion of the video picture displayed on a monitor. This portion or "window" is visible on the monitor screen, and its position and size can be changed as desired. The use of the "window" permits the exclusion of portions of the picture on which the automatic circuitry is less than fully effective, or which do not have components desirable for use in automatic color correction. If a separately variable luminance signal is produced, the automatic color correction circuitry preferably uses the luminance signal as a reference, thus allowing one to maintain color balance despite changes in the luminance signal.

Abstract: A color correction circuit is disclosed, which includes three video signal lines for supplying red, green and blue signals, respectively, a first circuit for detecting a white color component, a circuit for applying the red, green and blue signals to the first detecting circuit, a second circuit for detecting a predetermined color component, a circuit for applying at least two signals of the red, green and blue signals to the second detecting circuit, a circuit for producing a difference signal between output signals of the first and second detecting circuits and a circuit for controlling at least one of the red, green and blue signals according to the difference signal.

Abstract: A vertical transition processor for a comb filter detects the presence of a complementary-color vertical transition. A detector is provided for detecting if the color subcarrier on adjacent lines has the same phase angle and amplitude. This indicates the presence of a complementary-color vertical transition. If a complementary-color vertical transition is detected, then the comb filtered luminance and chrominance signals are selectively coupled to the luminance and chrominance processing channels so that the chrominance processing channel receives primarily color information and the color information is excluded from the luminance processing channel. This counteracts the adverse effects of the complementary-color vertical transition.

Abstract: A color image reader for decomposing two-color images into independent color components includes a color-separating mirror which is provided with a multi-layer interference filter on one of opposite major surfaces thereof. The other surface of the mirror serves as a reflection surface. Image light incident to the mirror is separated into two different color components which are then redirected to propagate in the same direction. The two color components respectively are focused to different line image sensors.