Abstract: A light emitting device comprising a substrate having first and second regions, a first non-transparent electrode formed on the substrate in the first region, a layer of organic light emitting material provided over the first non-transparent electrode in the first region, a layer of organic light emitting material provided over the substrate in the second region, the light emitting materials each having at least one planar surface which is corrugated, a second non-transparent electrode formed over the light emitting material in the first region, and a mirror formed over the light emitting material in the second region. A device having a stacked structure of electrodes and light emitting layers is also disclosed, as are various methods of fabricating the devices.

Abstract: Based on binary transmission data 12, a receiver 11 emits electromagnetic waves 13 with modulated plane of polarization into a free space 16. The data propagates along the free space 16 as the azimuth of the plane of polarization. A receiver 17 accepts the electromagnetic wave 13 with modulated plane of polarization discriminates the data based on the state of the plane of polarization, and outputs the binary received data 18. The data and the clock data are transmitted from a plurality of light-emitting units with different polarization states or wavelengths to omit PLL circuits.

Abstract: A light emitting device comprising a substrate, a transparent electrode formed on said substrate, a layer of light emitting material provided over the transparent electrode and having at least one corrugated surface, and a further electrode formed over the light emitting material. In a preferred arrangement there is provided a light emitting device comprising a substrate having a corrugated surface, a transparent electrode formed on said corrugated surface, a layer of light emitting material provided over the transparent electrode and a farther electrode formed over the light emitting material.

Abstract: A spatial optical transmission device and method of spatial optical transmission of a beam type that allow tracking of a light beam by simple control. A plurality of divergent type tracking beams (X1) are emitted from a transmitter (10), and from the distribution of the optical intensity of each of these tracking beams the positional difference between a tracking beam receiver (22) and a datum point is detected, this error information is transmitted from a receiver (20) to the transmitter (10), and using lenses (11, 13), the directions of the optical axes of the tracking beams are changed, and at the same time the direction of the optical axis of a data beam (40) is adjusted.

Abstract: An optical disk with clock pits disposed on tracks at predetermined intervals extending in a radial direction of the optical disk. Servo pits are arranged wobbly with respect to the tracks and auxiliary clock pits are arranged in such a manner that at least one auxiliary clock pit is provided between a pair of clock pits adjacent to one another in the radial direction of the optical disk.

Abstract: A magneto-optical recording medium permitting satisfactory recording of information even at a small magnetic field in magnetic field modulation recording. The magneto-optical recording medium comprises a recording film formed by deposition of a recording layer and an antiferromagnetic layer. The thickness of the antiferromagnetic layer is 150 angstroms or less. When the Curie temperature of the recording layer is Tc1 and the Neel temperature of the antiferromagnetic layer is Tc2, Tc2 is higher than Tc1.

Abstract: In order to facilitate control of the polarization plane of a laser beam emerging from a surface-emitting-type semiconductor laser in a specific direction and to suppress occurrence of fluctuations and switching of the polarization plane depending on the optical output and the environmental temperature, a strain generating section (19) is arranged adjacent to a resonator (10B) of a semiconductor laser. The strain generating section (19) impresses anisotropic stress to the resonator (10B) to generate strain, resulting in birefringence and dependence of the gain on the polarization in the resonator (10A). This enables stabilized control of the polarization plane.

Abstract: In a magneto-optical recording medium, a first dielectric layer 12, a recording layer 13, an auxiliary recording layer 14, a second dielectric layer 15 and a reflective layer 16 are sequentially laminated on a transparent substrate 11. Recording layer 14 is formed of a rare-earth transition-metal amorphous alloy having a film thickness of about several hundreds angstroms. Auxiliary recording layer 14 is also formed of a rare-earth transition-metal amorphous alloy. However, the Curie temperature T.sub.C2 of auxiliary recording layer 14 is 10.degree. K or more higher than the Curie temperature T.sub.C1 of recording layer 13, and the film thickness of auxiliary recording layer is ultra-thin, such as, 70 .ANG. or less. Further, the squareness ratio of auxiliary recording layer 14 at the Curie temperature T.sub.C1 of recording layer 13 is 0.7 or higher.

Abstract: In a magneto-optical recording medium, a protective layer 14, a first magnetic layer 11 formed of a light rare earth element-heavy rare earth element-transition metal alloy, a second magnetic layer 12 formed of a light rare earth element-heavy rare earth element-transition metal alloy, a third magnetic layer 13 formed of a light rare earth element-heavy rare earth element-transition metal alloy, another protective layer 15, and a reflection layer 16 are laminated in sequence on a transparent substrate 10. The first, second and third magnetic layers are sandwiched so as to form a recording film 17. The compositions of the first and third magnetic layers are so selected as to provide a large Kerr rotational angle in a short wavelength range (400 to 700 nm), which is high in the ratio of light rare earth element.

Abstract: In a magneto-optical recording medium, a protective layer 14, a first magnetic layer 11 formed of a light rare earth element--heavy rare earth element--transition metal alloy, a second magnetic layer 12 formed of a light rare earth element--heavy rare earth element--transition metal alloy, a third magnetic layer 13 formed of a light rare earth element--heavy rare earth element--transition metal alloy, another protective layer 15, and a reflection layer 16 are laminated in sequence on a transparent substrate 10. The first, second and third magnetic layers are sandwiched so as to form a recording film 17. The compositions of the first and third magnetic layers are so selected as to provide a large Kerr rotational angle in a short wavelength range (400 to 700 nm), which is high in the ratio of light rare earth element.

Abstract: In a magneto-optical recording medium, a first dielectric layer 12, a recording layer 13, an auxiliary recording layer 14, a second dielectric layer 15 and a reflective layer 16 are sequentially laminated on a transparent substrate 11. Recording layer 14 is formed of a rare-earth transition-metal amorphous alloy having a film thickness of about several hundreds angstroms. Auxiliary recording layer 14 is also formed of a rare-earth transition-metal amorphous alloy. However, the Curie temperature T.sub.C2 of auxiliary recording layer 14 is 10.degree. K or more higher than the Curie temperature T.sub.C1 of recording layer 13, and the film thickness of auxiliary recording layer is ultra-thin, such as, 70.ANG. or less. Further, the squareness ratio of auxiliary recording layer 14 at the Curie temperature T.sub.C1 of recording layer 13 is 0.7 or higher.

Abstract: The present invention relates to a magneto-optical media. More particularly, the present invention relates to a device for assuring a high S/N ratio by controlling the optical phase difference of the media by optimizing the film structure of a multi-layered thin film. The structure of the multi-layered thin film is such that the first protective film of a thickness between 400 .ANG. and 700 .ANG., a recording film of a thickness between 150 .ANG. and 300 .ANG., the second protective film of a thickness between 150 .ANG. and 250 .ANG., and a reflecting film of a thickness between 400 .ANG. and 800 .ANG., are successively laminated on a substrate. The first protective layer and the second protective layer are both suitably made of AlSiN, SiN, or SiO.sub.2 having refractivity between 1.95 and 2.05. The recording layer has a composition:Nd.sub.x Dy.sub.y (FeCo).sub.100-x-y,orNd.sub.x (DyTb).sub.y (Fe.sub.1-z Co.sub.z).sub.100-x-y,where25 at %.ltoreq.x+y.ltoreq.30 at %,0 at %.ltoreq.x.ltoreq.8 at %, and0.07 at %.

Abstract: In a magneto-optical recording medium, a protective layer 14, a first magnetic layer 11 formed of a light rare earth element--heavy rare earth element--transition metal alloy, a second magnetic layer 12 formed of a light rare earth element--heavy rare earth element--transition metal alloy, a third magnetic layer 13 formed of a light rare earth element--heavy rare earth element--transition metal alloy, another protective layer 15, and a reflection layer 16 are laminated in sequence on a transparent substrate 10. The first, second and third magnetic layers are sandwiched so as to form a recording film 17. The compositions of the first and third magnetic layers are so selected as to provide a large Kerr rotational angle in a short wavelength range (400 to 700 nm), which is high in the ratio of light rare earth element.

Abstract: An optical disk with clock pits formed on tracks at predetermined intervals extending in a radial direction of the optical disk. Servo pits are arranged wobbly with respect to the tracks and auxiliary cock pits are arranged in such a manner that at least one auxiliary pit is provided in a non track region between two clock pits adjacent in the radial direction of the optical disk. A plurality of auxiliary clock pits may overlap one another to form an auxiliary clock groove.

Abstract: A magneto-optic recording medium is formed from a plurality of perpendicularly magnetized thin film layers, each of which is capable of recording and reproducing information. The layers are mounted on a transparent substrate which is exposed to an incident laser. Layers farther from the incident substrate have a higher Curie temperature than closer layers. Recording on multiple layers is possible because information from a desired layer is successively transferred to layers closer to the incident beam for reading the information as recording is done on layers closer to the substrate. Information in a closer layer is stored in secondary data storage when farther layers are read and then rerecorded.