Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1982-03-30
1986-03-18
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
250213A, 250331, 340784, 340754, G09G 300
Patent
active
045771898
ABSTRACT:
A device for transforming information in electrical form into optical form, where the optical information consists of light intensity, light polarization or spectral composition varying with time. The transformation of information takes place from electrical into optical form by means of optical modulators, e.g. liquid crystals, and the transformation from optical form into electrical form is arranged to be carried out with photo-detectors, the device comprising components to control or sense said optical modulators in one, two or three-dimensions with time, and to sense or control said photo-detectors. The invention is characterized in that said components consist of one or more circuits with electro-optical feedback, in which at least one optical modulator is located in the ray path between at least one light source, for example a light-emitting diode or laser diode, and at least one photo-detector, for example a photo-resistor or a photo-diode, the photo-detector being connected into at least one electrical circuit, to which the optical modulator is connected in such a way that positive and negative feedback is obtained in a feedback loop. At least one light source is arranged to illuminate one photo-detector through one modulator and the other photo-detector through the other modulator, and one modulator is connected to the electric circuit of the other photo-detector, and the other modulator is connected to the electric circuit of the other photo-detector, thus obtaining a cross connection with electro-optical feedback.
REFERENCES:
patent: 3073963 (1963-01-01), Marko
patent: 3226553 (1965-12-01), Terlet
patent: 3353116 (1967-11-01), Trimble
patent: 3825922 (1974-07-01), Ralph
patent: 3944817 (1976-03-01), Hilsum et al.
patent: 3947842 (1976-03-01), Hilsum et al.
patent: 4031552 (1977-06-01), Bosserman et al.
patent: 4051462 (1977-09-01), Javan et al.
patent: 4085321 (1978-04-01), Sliva
patent: 4087687 (1978-05-01), Bean
patent: 4147932 (1979-04-01), Lewis
patent: 4272157 (1981-06-01), Collins, Jr. et al.
patent: 4413885 (1983-11-01), Hareng et al.
patent: 4427888 (1984-01-01), Galvin
patent: 4432611 (1984-02-01), Wei
Adolfsson Morgan
Brogardh Iorgny
Ovren Christer
ASEA Aktiebolag
Curtis Marshall M.
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