摘要:
An arrangement for generating modulated atomic resonance radiation includes a rare-gas filled discharge vessel provided with a window passing the generated resonance radiation, two electrodes between which a positive column discharge is maintained during operation of the arrangement and at least one hollow sputtering electrode which includes the element whose resonance radiation is desired. The arrangement includes means for applying a first pulsatory voltage to the sputtering electrode and furthermore means for applying a second pulsatory voltage to the electrodes for the positive column discharge, in which the pulse repetition frequency f for both pulsatory voltages is equal and has a value of between 10 and 104 Hz. The product of pulses repetition frequency f and pulse duration T1 of the first pulsatory voltage has a value of between 0.5 and 10 4 and the second pulsatory voltage has a delay time Tau relative to the first pulsatory voltage in which 0
摘要:
An image display cell having a transparent wall portion, electrodes and an oxidizable redox substance and a reducible redox substance in an electrochemically inert liquid in contact with electrodes. The cell includes at least two electrodes which are in contact with a cell liquid in which a colourless viologen salt (formula I) has been dissolved. When a potential difference of at least 0.5 Volt is applied to the electrodes, this salt is reduced to a coloured insoluble compound which adheres to the cathode, so that the latter is coloured, thereby producing an image.
摘要:
According to the invention, a device is provided for producing stimulated infrared emission, an iraser, having a wavelength of approximately 10.6 by means of an electric discharge having a current density exceeding 15 mA/sq.cm in a gas mixture. The mixture consists of carbonic acid gas, nitrogen, helium and water vapour in a discharge tube of a few metres length and which includes a plane parallel plate of germanium having a thickness of approxmately 2 mm as output coupling window and also as a reflector. The discharge tube has a diameter of maximally 10 mm, the water vapour pressure is from 0.3 to 0.4 Torr and the ends of the discharge tube are connected by a narrow communication tube in which no discharge takes place.