Class / Patent application number | Description | Number of patent applications / Date published |
250227210 | With light chopping or modulation | 7 |
20110031382 | PHOTOELECTRIC ENCODER - A photoelectric encoder includes: a scale; a detection head; fibers through which light that is to be irradiated on the scale and light reflected by the scale propagates; first and second cables each having a space in which the fibers are partially disposed; and a case that encloses a light source that supplies light to one of the fibers and a light-sensitive element that receives the reflected light propagating through the others of the fibers and converts the received light into an electric signal. The first cable, the second cable, and the case are disposed in this order in the direction of propagation of the reflected light. The positions of the fibers are fixed relative to one another inside the first cable in the direction orthogonal to the direction of length of the fibers and variable relative to one another inside the second cable in the orthogonal direction. | 02-10-2011 |
20120138780 | DEVICE FOR CONVERTING LIGHT INTO AN ELECTRICAL SIGNAL - A device for converting light transmitted by an optical transmission element into an electrical signal. Light is decoupled from a coiled or helically bent fiber and coupled into distributed over photovoltaic cells rather than concentrated at a small coupling location. | 06-07-2012 |
20140346332 | ENDOSCOPE - An endoscope includes: a first objective lens that causes an image of a first object to be observed to be formed; a second objective lens that causes an image of a second object to be observed to be formed; a light guide that guides illuminating light from a light source to an insertion portion; a light distribution member that distributes light from the light guide between a first observation direction and a second observation direction; a light amount varying portion for changing light amount proportions with respect to light emitted in the first observation direction and light emitted in the second observation direction; a distance detection portion that measures a second distance between the second objective lens and an object to be observed in the second observation direction; and a control portion that controls the light amount varying portion based on a second distance signal. | 11-27-2014 |
20150378187 | SOLID STATE LIDAR CIRCUIT - A solid state photonics circuit having a liquid crystal (LC) layer for beam steering. The LC layer can provide tuning of an array of waveguides by controlling the application of voltage to the liquid crystal. The application of voltage to the liquid crystal can be controlled to perform beam steering with the light signal based on different tuning in each of the waveguides of the array. The waveguides are disposed in a substrate having an oxide or other insulating layer with an opening. The opening in the oxide layer exposes a portion of a path of the array of waveguides. The waveguides are exposed to the liquid crystal through the oxide opening, which allows the voltage changes to the liquid crystal to tune the optical signals in the waveguides. | 12-31-2015 |
20160025523 | DEMODULATION SYSTEM FOR 3D-MATRIX MULTI-CHANNEL FIBER OPTIC SENSING - A demodulation system for 3D-matrix multi-channel fiber optic sensing includes a wavelength swept optical source that generates an incident light, an optical frequency domain reflector and a balanced detector connected with the wavelength swept optical source through a fiber circulator. The optical frequency domain reflector includes a first optical path and a second optical path with a frequency shifter arranged on one or both of the optical paths. The optical frequency domain reflector outputs incident light to an optical switch module. The optical switch module selectively transmits the incident light to a sensor network as well as transmits the reflection light from the sensor network to the optical frequency domain reflector. | 01-28-2016 |
20160161691 | OPTICAL FUNCTIONAL DEVICE, OPTICAL RECEIVING APPARATUS AND OPTICAL TRANSMISSION APPARATUS - An optical functional device includes: a photodetector; a first optical waveguide which is connected to one end face of the photodetector; and a second optical waveguide which is connected to the other end face of the photodetector. The photodetector is formed in a multi-mode interferometer and has electrodes. Light input from the first optical waveguide to the photodetector focuses image at a position physically away from the second optical waveguide, and light input from the second optical waveguide to the photodetector focuses image at a position physically away from the first optical waveguide. | 06-09-2016 |
250227220 | Keyboard or other manual switch controlled | 1 |
20090152451 | TOUCH-SENSITIVE MOMENTARY-CONTACT SWITCH AND OPERATING DEVICE HAVING AT LEAST ONE TOUCH-SENSITIVE MOMENTARY-CONTACT SWITCH - A touch-sensitive momentary-contact switch includes an infrared-radiation-emitting transmitter, an infrared-radiation-receiving receiver and at least one visible-light-emitting signal element. The transmitter, receiver and signal element radiate into a single light-guiding element. Due to optical beam guidance, a separation of a transmission channel and a reception channel in the light-guiding element is effected in such a way that at a top-side area of the light-guiding element remote from the transmitter and the receiver, a superimposition of a region that can be irradiated by the transmitter and a region that can be detected by the receiver is produced only on a small portion of the area. An operating device for a domestic appliance including at least one touch-sensitive momentary-contact switch, is also provided. | 06-18-2009 |