81results about How to "Reduce light energy loss" patented technology

A light emitting array including at least a plurality of light emitting elements, each of which is provided thereon with a microlens in one-to-one correspondence. Light emitting portions of the light emitting element are provided having the shape of a rectangle and formed so as to satisfy the relational expression, Lmin≦D≦P, where Lmin is the length of the shorter side of the rectangle, P an alignment pitch of the light emitting elements, and D the diameter of microlens. In addition, light emitting elements are formed in line on a transparent thin film layer to satisfy the relationship, T1≦2·D2, where T1 is the thickness of the transparent thin film layer and D2 the diameter of each microlens. The light emitting array may suitably be included in the light source unit which is then incorporated into image forming apparatuses for forming mono-color or multiple-color images.

The invention relates to a method for preparing light-transmitting concrete by a spinning optical fiber technology, and belongs to the field of novel building materials. Organic multi-mode optical fibers with the diameter of 2 to 200mu m are adopted and spun into fiber cloth or a fiber integrated body according to a certain rule, the fiber cloth or the fiber integrated body is taken as a conductor for transmitting light rays to achieve special effects of transmitting light and images and the like of a cement concrete material, and the content of the optical fibers in a building block can be greatly reduced to 5-15 volume percent. The material has the advantages of high light-transmitting property and stability, convenient preparation process, designable decorative effect and the like, andis a novel second-generation light-transmitting cement concrete material.

The invention discloses a light beam deflection control method based on a liquid crystal optical phased array, relates to the field of liquid crystal optical phased arrays, and aims to solve the problems of low beam pointing precision and low system tracking bandwidth existing in the prior art; a beam of linearly polarized light emitted by a laser passes through a beam expanding collimation systemand an emitting system to generate linearly polarized light; the linearly polarized light is subjected to diffuse reflection on an object to be measured after passing through a beam contracting and angle expanding system; a receiving system receives light signals reflected by the object to be measured in a diffuse reflection mode, and the light signals are converged to the light sensing surface of a CCD detector, and the difference value between the laser spot position and the center of the CCD detector is calculated; an oblique incidence type triangular measuring method is adopted to obtainan actual light beam deflection angle; the error of the actual light beam deflection angle and a set light beam deflection angle is transmitted to a fractional order PID controller, and a liquid crystal optical phased array driving circuit is controlled by the fractional order PID controller to input a proper voltage to the liquid crystal optical phased array, so that the liquid crystal optical phased array generates corresponding phase modulation, and accurate deflection of emergent light beams is realized.

The invention discloses a reeling device for depolarizing single mode optical fiber ring. Two supporting elements are respectively disposed at the two sides of a chassis, a rotating shaft is installed at the front side face of one supporting element and driven to rotate by a motor arranged on the supporting element, a baffle and a reeled ring are disposed on the rotating shaft, one end of a connecting rod is fixedly connected with the rotating shaft, the other end of the connecting rod is provided with a fixed shaft, a baffle and a preparative ring are disposed on the fixed shaft, a rotating shaft is installed on the other supporting element and driven to rotate by a motor arranged on the supporting element, the rotating shaft is connected with the short arm of an L-shaped bracket, a rotating shaft is installed on the long arm of the L-shaped bracket and arranged with a baffle and a preparative ring, a horizontal guide track is disposed on the chassis, and a sliding block arranged with a motor is capable of sliding in the horizontal guide track. The invention can twist the single mode optical fiber while reeling, so as to obtain a single mode optical fiber ring with depolarizing function. Therefore, the optical fiber gyroscope system can omit depolarizer, so as to simplify the system, and reduce the optical energy loss and measurement error of the gyroscope system.

A backlight module capable of increasing light output efficiency is disclosed. The backlight module includes a light emitting element, a light guide plate, a circuit board, and an intermediate layer. The light guide plate is disposed at a side of the light emitting element. The circuit board is disposed above the light emitting element and the light guide plate. The intermediate layer is disposed between the light emitting element and the light guide plate, and its light transmittance is greater than that of air. The intermediate layer decreases optical energy loss between the light emitting element and the light guide plate, and a goal to increase the light output efficiency of the backlight module is achieved. The present invention also improves an alignment between the light emitting element and the light guide plate when the light emitting element and the light guide plate are assembled together.