99results about How to "Avoid light interference" patented technology

An optical scanner system and method having a light source, a first mirror rotatable along a first torsion axis to reflect light from the light source, a first vibrator to vibrate the first mirror, a second mirror positioned adjacent to the first mirror and rotatable along a second torsion axis different from the first torsion axis, a second vibrator to vibrate the second mirror, and a mirror reflecting the light reflected from the first mirror to the second mirror. In addition, microminiaturization may be further embodied by applying an MEMS technology. Further, a vibrating body may be designed to vibrate with high frequencies by reducing the size and mass of the vibrating body. Through embodiments of the present invention, it is also possible to prevent interference between light entering a mirror package and the finally reflected light.

The invention discloses a fill light lamp automatic control method based on video analysis. The fill light lamp automatic control method based on the video analysis achieves the automatic control over a fill light lamp according to the changing of brightness values in a monitoring area. The fill light lamp automatic control method based on the video analysis achieves the self-adaptive control over the fill light lamp according to the changing of ambient brightness, avoids electric energy waste and light pollution to the environment by the fill light lamp, avoids the phenomena that the definition of monitoring video images declines due to insufficient light and the fill light lamp may flicker, saves equipment investment, shortens mounting construction cycles, and improves the reliability of system working.

A light emitting device including first, second, and third LED sub-units, and electrode pads disposed on the first LED sub-unit, electrically connected to the LED sub-units, and including a common electrode pad electrically connected to each of the LED sub-units, and first, second, and third electrode pads connected to a respective one of the LED sub-units, in which the common electrode pad, the second electrode pad, and the third electrode pad are electrically connected to the second LED sub-unit and the third LED sub-unit through holes that pass through the first LED sub-unit, the first, second, and third LED sub-units are configured to be independently driven, light generated in the first LED sub-unit emitted to the outside through the second and third LED sub-units, and light generated in the second LED sub-unit is emitted to the outside through the third LED sub-unit.

A flexible lighting panel includes: a base layer having one side surface on which a circuit pattern is disposed and made of a flexible material; a plurality of LEDs mounted on one side surface of the base layer; and a heat dissipating layer laminated on the other side surface of the base layer.

The present invention relates to a coating composition containing metal oxide particles with a high refractive index and low photocatalytic activity and a coating film obtained by applying the coating composition onto a substrate. The coating composition contains metal oxide particles with a high refractive index obtained by coating the specific fine particles of the titanium-based oxide on their surfaces with at least a silica-based oxide or a silica-based composite oxide, and the coating film is obtained by applying the coating composition onto a substrate. The metal oxide particles with not only a high refractive index but also low photocatalytic activity, and therefore a coating film with excellent weathering resistance and light resistance can be formed on a substrate.

The invention discloses an optical sheet for use in liquid crystal displays, which simultaneously functions to uniformly diffuse light emitted from a light guide plate and a diffusion plate and to increase brightness, decreases the loss of light, and enables the fabrication of thinner liquid crystal displays.

A method apparatus for sensing gases using a semiconductor diode laser spectrometer, the method comprising: introducing a sample gas into a non-resonant optical cell ( 17 ); applying a step function electrical pulse ( 19 ) to a semiconductor diode laser ( 20 ) to cause the laser ( 20 ) to output a continuous wavelength chirp for injecting ( 16 a) into the optical cell ( 17 ); injecting ( 16 a) the wavelength chirp into the optical cell ( 17 ); using the wavelength variation provided by the wavelength chirp as a wavelength scan, and detecting ( 23 ) light emitted from the cell ( 17 ), wherein a chirp rate is selected to substantially prevent light interference occurring in the optical cell ( 17 ).

A reflector to be used in a liquid crystal display for reflecting an external light to display images therewith, including an organic film, and a reflective film formed covering the organic film therewith. The organic film has first raised and recessed portions at a surface thereof, and second raised and recessed portions formed at a surface of the first raised and recessed portions. The first raised and recessed portions include raised portions and recessed portions at least one of which is arcuate in cross-section, and the second raised and recessed portions are smaller in size than the first raised and recessed portions. The reflective film is shaped reflecting the first and second raised and recessed portions.

The invention discloses a character-wheel-type meter reading method and a character-wheel-type direct-reading meter. With respect to a photoelectric direct-reading type meter, at an optical pulse emitting end, a coded optical pulse is transmitted in optical fibers; the coded optical pulse irradiates to a specific position on a character wheel, wherein the specific position is provided with a light reflection or transmission area corresponding to characters on the character wheel; at an optical pulse receiving end, the coded optical pulse from the light reflection or transmission area is received by optical fibers and decoded by a decoding module so as to finally obtain the corresponding characters of the character wheel; the optical fibers at the optical pulse emitting end and the opticalfibers at the optical pulse receiving end are arranged in pairs and are opposite in positions; and in accordance with the system of the character wheel, a corresponding number of pairs of the opticalfibers at the optical pulse emitting/receiving ends are arranged so as to meet a condition that the emitted coded optical pulse and the received coded optical pulse in each pair of optical fibers areconsistent. By means of the invention, the problems of susceptibility to optical pollution, large optical interference between adjacent meters, large electromagnetic interference, poor safety, low reliability, high reading error rate and the like of the traditional direct-reading type meter are solved.

The present invention relates to an illumination apparatus in which a light source module 100 is mounted on a steering wheel 10, an illumination element 200 is mounted on a driver airbag cover 20, and the light of the light source module 100 is transmitted to the illumination element 200 through an optical fiber 300. When the driver airbag cushion is deployed due to an accident, it is possible to prevent the scattering of the light source module 100, thereby preventing injuries to the passengers due to the light source module 100, simplifying the structure of the driver airbag cover 20 and achieving weight reduction.

A probe assembly used in testing instrument for determining optical signal within a test cell, comprising a top plate (5;205) with a through-hole (52;250) therein; a cylindrical light hood (2;202) having a central channel (21;221); the lower end of the optical pickup (1) is inserted into said channel (21;221) and surrounded by said light hood, and said light hood can slide down and up within a small distance isolating said one test cell of the sample being detected from its adjacent cells and surroundings when the lower end of said light hood is in said protruding position, so that the light interference from the adjacent test cells and surroundings with (to) the determination of the sampling being detected can be avoided. Also, the present invention further relates to the light hood included in the probe assembly and the instruments including the probe assembly.

The invention discloses a testing device for measuring a plane global frictional force vector field and a working method, relates to the field of aerodynamics, and can solve a problem of the measurement of the global frictional force vector field of a wall surface. The device comprises a downstream flat plate, a detachable black flat plate, a calibration line, a support, a light source, a movablehinge, an angle scale, a rotatable cantilever, an adjustable connecting rod, a camera connecting support, and a hinge connecting part. The device is simple in structure, and is convenient to operate and control. A tested flat plate serves as a part of a measurement part, so the device can achieve the integrated design of a measurement/flowing wall surface. Through the spraying of a liquid crystalcoating in a certain range, the device can achieve the measurement of a global frictional force field.

A method for adjusting a timepiece including: providing a portable object including a screen and a camera; testing accuracy of a piece of time information of the timepiece by using the camera of the portable object to compare with a piece of time information obtained from an external source; sending the time information from the portable object to the timepiece if a difference is detected, the timepiece including at least one phototransistor arranged at a case for receiving the time information, the timepiece to display the correct time information, the sending including: defining on the screen of the portable object an area of shape and dimensions similar to the case of the timepiece; holding the case of the timepiece against the area; sequentially displaying black or white in the area, in a sequence of black and white corresponding to a luminous coding of the time information.

An integrated light-transmission optical module for a safetyoptoelectronic barrier, comprises a condenser element having a first lens, and an objective having a second lens which are located respectively at a first end and a second end. The module comprises a single-piece entity made of transparent material, and having an intermediate zone provided with deflectors formed by a succession of dioptric surfaces distributed along the direction of light flux propagation between the first lens and the second lens. The deflectors ensure a deflection outside the optical module of stray rays reflected inside the module, so as to prevent transmission of strays rays, either through the second lens of the objective if it is a light transmission coming from the condenser element, or through the first lens when receiving light coming from the second lens.