Abstract: A multilayer film optical filter includes a multilayer film including a plurality of dielectric material thin films repeatedly laminated on a substrate and having different refractive indexes. The multilayer film optical filter further includes a relaxation layer composed of a single material, having a thickness in the range of 1 to 10 &mgr;m, and provided below the multilayer film near the substrate, for relaxing the influence of an error in thickness measurement due to a temperature rise of the substrate in an initial stage of deposition.

Abstract: An apparatus for depositing an optical thin film at a high accuracy has a vacuum chamber in which a thin film is formed on a substrate by vapor deposition of a material at a target using ion beams from an ion gun, an optical monitor for optically measuring the thickness of the thin film and outputting transmittance data DT, a crystal monitor for measuring a frequency which changes as the deposition proceeds and for outputting frequency data DF, and a determination circuit 12. The determination circuit select between the optical monitor and the crystal monitor to control the thickness of the thin film to be formed on the substrate.

Abstract: In a relative angle detecting device, plural received light outputs are subjected to time division. Received light detection voltage is shifted by a phase shifter and sampling pulse is formed, and peak detecting means holds peak value of received light output based on the sampling pulse. In a CPU, peak value of each voltage is stored in a memory, and the stored value is operated thereby information regarding relative position between a light source and a light reception element is operated. Utilizing the time division, each received light detection voltage can be processed in the same condition, and the peak value of each received light output can be detected with high precision.

Abstract: In a relative angle detecting device, plural received light outputs are subjected to time division. Received light detection voltage is shifted by a phase shifter and sampling pulse is formed, and peak detecting means holds peak value of received light output based on the sampling pulse. In a CPU, peak value of each voltage is stored in a memory, and the stored value is operated thereby information regarding relative position between a light source and a light reception element is operated. Utilizing the time division, each received light detection voltage can be processed in the same condition, and the peak value of each received light output can be detected with high precision.

Abstract: A pair of detecting stations A.sub.i and A.sub.-i on a plane H extends along an axis X. Each of the detecting stations is provided with an iris member and a divided light receiving section. Received light outputs at each of the light receiving elements are defined as R.sub.i, L.sub.i, R.sub.-i, and L.sub.-i, and the following equation is calculated to enable a coordinate (x.sub.0, z.sub.0) of the moving light source to be attained by a simple calculation: S.sub.i =(R.sub.i -L.sub.i)/(R.sub.i +L.sub.i)+(R.sub.-i -L.sub.-i)/(R.sub.-i +L.sub.-i); T.sub.i =(R.sub.i -L.sub.i)/(R.sub.i +L.sub.i)-(R.sub.-i -L.sub.-i)/(R.sub.-i +L.sub.-i).

Abstract: An apparatus is disclosed for inclination detection wherein infrared transmitted signal, signal groups S1, S2, S3, . . . including a leader code, a parity bit and bits for data transfer are sequentially transmitted with an interval time t3. At each bit of the signal group S1, "1" and "0" of a binary signal expressing the data are not inverted, at the signal group S2, "1"and "0" expressing the data are inverted, and inversion and non-inversion are repeated every signal group. At bits of each signal group, since a time length expresses "1" and "0", a total time length of each signal group is different from that of other signal group. By repeating sets of inverted and non-inverted signal groups, the time length of each set is averaged, and hence, data processing can be made more efficient.

Abstract: A remote coordinate designating device has a remote control with a light emitting device for emitting light, and a controller for detecting a designated position by receiving light from the remote control at a distance from the remote control. One cycle of a light signal from the light emitting device is composed of switch data and a coordinate detection timing header at the head, and a coordinate detection carrier. The switch data and the coordinate detection timing header use the same frequency as the normal remote control frequency band, and the frequency of the coordinate detection carrier is lower than the frequency of the switch data and the coordinate detection timing header. The switch data contains on-off information about a switch for pointing, and coordinate detection is started when a predetermined time has passed from the rise of a burst portion in the switch data.

Abstract: A light-emitting diode device includes a light-emitting diode, a lens cap made of synthetic resin, for covering the light-emitting surface of the light-emitting diode means, and a refractive layer formed between the light-emitting surface and the lens cap, the refractive layer having a composition, such as an air layer, with a refractive index different from the refractive index of said synthetic resin. In this arrangement the relationship between the light intensity and directional angles is shown by characteristics in which the light intensity is maximum in the center of the directional angles, and is relatively flat in the form of a sinusoid in the wide range of the directional angles. Therefore, even when the characteristics of each light-emitting diode is not verified, a predetermined light-signal transmission range is readily obtained without being affected by a scatter in the characteristics.

Abstract: A relative-angle detection apparatus which has an infrared-signal transmitting unit and an infrared-signal receiving unit. The transmitting unit includes a first light-emitting device array formed of a plurality of light-emitting devices disposed in a direction substantially coinciding with the fiducial axis for angle detection, and a second light-emitting device array formed of a plurality of light-emitting devices located to be slightly angled in the different directions with respect to the axis. The devices of the first light-emitting device array generate a continously-output first infrared signal in which an infrared signal is intermittently modulated by a first frequency and also modulated by a second frequency higher than the first frequency. The devices of the second light-emitting device array generate a second infrared signal in which an infrared signal is modulated by the first frequency and also divided into a plurality of signals so as to be output at different timings.

Abstract: An information transmitting apparatus for efficiently transmitting input information coming from a plurality of transmitters wherein a receiver can determine the type of the transmitter from which the information was sent, the apparatus being produced at low cost and matching the conventional counterpart in signal reach distance.

Abstract: According to the present invention there is provided a space coordinates detecting device wherein a detecting section for detecting light emitted from a light source is provided, thereby permitting detection of a relative angle between a light emitting sections and the detecting section and hence permitting application of the detecting device to an input apparatus. The detecting section is provided with a light sensing element 23 having quartered light sensing portions. In the light emitting section, distinguishable lights are emitted from two light sources. The lights thus emitted are throttled through apertures and applied as separate square light spots S16 and S17 to the light-sensitive surface of the light sensing element 23. By calculating a difference in the detected output among the quartered light sensing portions, it is possible to determine the center I1 of the square light spot S16 and the center I2 of the square light spot S17.