摘要:
A heat-sensitive printer is provided with an apparatus for effecting the stoppage of a travelling ink donor sheet as soon as a recording sheet can be separated therefrom of the printing, in order to economize the consumption of the donor sheet.
摘要:
A compact thermosensitive printing machine includes a paper supply guide extending obliquely into a housing to a printing roller at its lower end, and a discharge tray on top of the supply guide for receiving the copied paper face-up after it has passed around the printing roller.
摘要:
A heat sensitive recording apparatus using an ink donor sheet in the form of a continuous band includes a device for detecting and correcting the tension applied to the band so as to prevent creases, etc. from being formed therein.
摘要:
A framing member forming a frame of a factory building is provided with a slit for attaching a holder on one side face of the framing member, the slit extending in a longitudinal direction of the framing member, the slit is provided with a detachment prevention mechanism configured to exert an action of preventing an insertion piece of the holder from being detached and to fix the holder to the framing member, along with an insertion of the insertion piece into the slit, and the holder is provided with a pinching piece configured to pinch an end edge portion of a wall panel between the pinching piece and the framing member to fix the wall panel to the framing member, along with the insertion of the insertion piece into the slit.
摘要:
A transmitter/receiver including a stack of semiconductor layers with an active layer 12 and a diffraction grating 16 with a phase shifter 18. A tapping electrode 30 is formed above the phase shifter in order to tap a voltage whose variations reflect the frequency modulation of a light beam propagating in the active layer. A bi-directional optical link is formed by connecting multiple transmitter/receivers according to the invention together via optical communication lines. The present invention finds particular application in the field of optical telecommunications.
摘要:
Method to control the thickness of an antireflection coating.According to the invention, the semi-conductive structure (14) is fed with a constant current (16) and the voltage (24) is measured at its terminals. This voltage passes through a maximum when the reflectivity of the antireflection coating passes through a minimum.Application for the embodiment of semi-conductive lasers.
摘要:
A semiconductor electro-optical monolithic component includes at least first and second sections (20, 30) each having respectively a first wave guide (21) and a second wave guide (31) transmitting light, the wave guides being etched in the form of strips and confined between an upper cladding layer (11) doped with carriers of a first type and a lower layer (10A, 10B) doped with carriers of a second type, a third section (40) being disposed between the first and second sections (20, 30) and having a third guide not transmitting light, the third guide being disposed so as to couple the first guide (21) to the said second guide (31). An absorbent layer (70), having a photoluminescence wavelength at least equal to the smallest wavelength of the waves propagating in the first and second wave guides (21, 31), is placed in the said lower layer (10A, 10B) doped with carriers of the second type; the said lower layer (10A, 10B) having an index lower than that of the absorbent layer (70) and that of the said second and third guides (31).
摘要:
A coherent detection transceiver comprises a stack of semiconductor layers with an active layer (12) and a grating (16) having a phase shifter (18). An electrode (30) is placed above the phase shifter in order to tap a voltage. This voltage is processed in a heterodyne circuit (36) in order to restore the modulation of the light beam introduced into the active layer.
摘要:
In a semiconductor device (1) for the transmission-reception of modulated optical signals having a semiconductor substrate on which are monolithically integrated a transmitter (4) able to transmit a signal formed by a modulated light carried by a first wavelength, a receiver (6) able to detect a reception signal formed by a modulated light carried by a second wavelength is also provided a sensor (10) of a signal representative of extraneous noise and subtraction means (11, 13, 15) for subtracting from the reception signal a compensation signal formed from the signal representing the extraneous noise detected by the sensor (10). The invention also relates to a process in which the extraneous noise is detected in the vicinity of the receiver and from the signal received by the receiver is subtracted a signal formed from the detected extraneous noise signal.
摘要:
The present invention provides a sheet feeding apparatus which includes a first conveying device for conveying a sheet stack formed in a stepped fashion by offsetting each sheet by a predetermined distance in a predetermined direction toward the predetermined direction or toward an opposite direction, a separating device disposed at a downstream side of the first conveying means in the predetermined direction and adapted to separate an outermost sheet from the sheet stack being fed by the first conveying device, a second conveying device for conveying the sheet separated by the separating device, and control device for controlling the first conveying device in such a manner that the first conveying device is activated to convey the sheet stack in the predetermined direction and the first conveying device is stopped after the sheet separated by the separating device starts to be conveyed by the second conveying device.