摘要:
There are described a novel squarylium compound represented by the formula (I): ##STR1## and an optical information recording medium using the squarylium compound in the recording layer.
摘要:
The present invention provides a process for producing a compound having a group represented by general formula (II). (wherein R1, R2, and R3 may be the same or different, and each represent a substituted or unsubstituted alkyl, a substituted or unsubstituted aryl, or a substituted or unsubstituted aralkyl, or R1 and R2 may bind to each other to form an alicyclic hydrocarbon ring together with the adjacent carbon atoms, or R2 and R3 may bind to each other to form a alicyclic heterocyclic ring together with the adjacent O—C—C that may have a substituent), which comprises allowing a compound having a hydroxyl group to react with halogenated alkyl ether represented by general formula (I): (wherein R1, R2, and R3 are the same as those defined above, respectively and X represents a halogen atom).
摘要:
A lens for eyeglasses and a molded synthetic resin for light transmitting filters are disclosed, which can reduce the glare of light and can provide a clear color sense, while retaining the lightness in the field of vision. The lens for eyeglasses and the molded synthetic resin for light transmitting filter are made of a synthetic resin base material comprising an organic dye with an absorption maximum in the vicinity of the central wavelength on the standard relative visibility curve, as well as an ultraviolet light absorbing agent and a blue light absorbing agent, the base material having a transmittance minimum in the range of wavelength extending from 550 to 585 nm on the transmittance curve, the transmittance of light at the transmittance minimum being not greater than 25%, the average transmittance of light over the range of wavelength extending from 590 to 660 nm being not less than 15%, and the average transmittance over the range of wavelength extending from 470 to 550 nm being not less than 10%. The above synthetic resin base material in the lens or the molded synthetic resin may further comprise an infrared light absorbing or reflecting agent.
摘要:
The present invention provides oils for cosmetics comprising a dibasic acid diester represented by general formula (I) (wherein R1, R2, R3 and R4, which are the same or different, each represent lower alkyl) and excellent in solubility of a long-wave ultraviolet light absorber or the like, and so forth.
摘要:
Decoding or demodulating circuitry can produce stereo right channel and left channel signals from AM stereo signals that have been coded according to any of the well known methods. A stereo sum signal made up of the left and right channel stereo signals added together, and a stereo difference signal made up of the difference between the stereo left and right channel signals are developed and fed to a matrix to interconnect these signals to extract or separate the left and right channel stereo signals. At least one of the known methods of stereo coding requires phase shifting of these two developed signals and suitable phase shift circuitry, along with a switching circuit provides the matrix with the appropriate signals when that method of stereo coding is employed at the broadcast side. The stereo sum signal is developed using envelope detection and the stereo difference signal is developed using synchronous detection, with the synchronous detector employing signals developed in the envelope detection process. When the stereo broadcasting wave belongs to the other coding systems, the stereo sum and difference signals are respectively supplied directly to the matrix circuit through the switches.
摘要:
In a teaching system having a central or master station and one or more student stations remote from the master station, there are provided, at the master station, at least one source of main signals in a first frequency band, which source may be constituted by a tape or other record player for reproducing teaching or instructional materials, a microphone or other source of audio signals from a proctor or supervisor of the teaching system, and a source of control signals which may include address signals for identifying one of the student stations and command signals for controlling various operations of the addressed student station. The audio and control signals are employed to modulate respective carriers so as to provide first and second auxiliary signals, respectively, in frequency bands which are removed from each other and from the first frequency band of the main signals, whereupon the main signals and the first and second auxiliary signals are multiplexed to provide a composite signal which, in turn, modulates a carrier of predetermined frequency suitable for being transmitted to each of the student stations.
摘要:
The present invention provides a visible light-sensitive composition which is highly sensitive to a visible light and is useful as an electronic circuit forming material, a lithographic printing material, etc., said visible light-sensitive composition comprising (a) a polymer comprising a repeating unit represented by general formula (I): wherein R1, R2, and R3 are the same or different and each represents substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl, or alternatively R1 and R2 form cycloalkyl together with the adjacent carbon atom, and R4 represents lower alkyl, (b) a compound that generates an acid by visible light irradiation and (c) a sensitizing dye.
摘要:
There is described a chemical amplification resist composition which comprises squarylium compounds represented by the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and represent substituted or unsubstituted aminophenyl, 9-julodidyl, Y.dbd.CH-- (wherein Y represents substituted or unsubstituted heterocyclic group containing nitrogen, or a group: ##STR2## (wherein Z.sup.1 and Z.sup.2 are the same or different and represent substituted or unsubstituted phenyl), photochemical acid generator and binders.
摘要:
A receiver having a circuit producing a control signal that has an amplitude proportional to the intensity of an input signal, and a control circuit permitting the passage of high frequency components of a low frequency signal therethrough or preventing the passage thereof, as determined by the control signal. The receiver further includes a control circuit that permits passage of low frequency components of the low frequency signal or prevents passage thereof, as determined by the control signal.
摘要:
A radio receiver with a phase-locked loop demodulator is described. The phase-locked loop includes a phase comparator, a variable frequency (voltage-controlled) oscillator, and a low pass filter. The capture range and lock range of the phase-locked loop are controlled in response to the tuning of the loop. In an AM receiver with a phase-locked loop the variable frequency oscillator of the loop supplies a reference carrier for a synchronous detector which is phase-locked to a modulated carrier. A band pass filter eliminates undesired modulation of the variable frequency oscillator by an undesired received signal.