The knowledge - LED optical design China lighting network

What is the LED an optical design and the secondary optical design? Whether all the LED contains an optical design and the secondary optical design? Today we're going to simple know about the basic knowledge of the LED optical design, take you into the LED field. A, an optical LED chips encapsulation into LED optoelectronic components, a first optical design, in order to solve the LED light Angle, light intensity, and the size of the luminous flux, intensity distribution, the range of color temperature and distribution. This is known as an optical design. So an optical design is mainly on the chip, stents, the grain of the three elements of design. LED light source is mainly two, secondary optical intensity distribution form secondary optical design for high power LED lighting is generally high power LED has a lens, light Angle of 120 degrees or so. Secondary optics is to again after a lens, the light through an optical lens to change its optical properties. High power LED lighting components before he became a lighting products, generally must carry on the two optical design. So the secondary optical design is mainly to optimization design of LED lighting appliances, LED light source, the secondary optical light distribution design, throw light on large area and flood lighting light distribution needs are most urgent. Through the secondary optical design technique, design and reflection cup and multiple optical lens and the aspherical optical surfaces, can significantly improve the efficiency of the device get light. Three, the action of the secondary optical light spread to the broader scope, and change the light intensity distribution wide beam assembled into narrower beam four, secondary optical design principle of any point of the intensity of illumination in the lighting area are made by many different points of the light source of light, and through the optical lighting system formed after the redistribution of superposition. Optical illumination optical system generally includes the LED light source, optical system and the planar five, LED optical illumination system design method, and the optical system design requirements are proposed according to the requirement to collect for the parameter conditions of the optical system is necessary, in the optical 'impossible' is 'unreasonable' demands out optical system overall design layout, the design of the optical parts according to design requirements to optimize optical effect, draw product drawings are usually performed by computer-aided software, consider molding products processing, the output image file six, seven, LED lamps and lanterns use scenarios and test simulation of optical system classification 1. Reflection cup / 2. Lens / 3. Reflection cup with lens in general, the combination of the lens is more effective than mirror can change the light. Eight, LED optical lens materials classification 1. A silicone lens. Silicone high temperature resistant, Can also be reflow soldering) , so commonly used packaging on the LED chip directly; b。 General silicone lens smaller, generally in 5 - diameter 10毫米; 2. PMMA lens and a. Optical PMMA. Match dimethyl methyl within ene, commonly known as acrylic) 。 This material after forming is more brittle, not suitable for production of special shape complex products; b。 Advantages of high production efficiency, Can be done by injection) , high light transmittance, When the thickness of 3 mm penetration rate was about 93%) 70 degrees, shortcomings and heat-resistant, thermal deformation temperature of 90 degrees; 3. A PC lens. Optical grade Polycarbonate ( Hereinafter referred to as PC) Polycarbonate, have very strong toughness, impact resistance performance is good; b。 Advantages of high production efficiency, By injection) , high temperature resistant, More than 130 degrees) ; Slightly lower defect light transmittance ( 88%) ; 4. Glass lenses have high light transmittance ( 97%) High heat resistance, defect is fragile, low production efficiency, high cost. Nine, ten LED optical lens materials classification, LED optical lens materials plant will be the official auspicious

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