Using the goniophotometer and integrating sphere is one of the important ways to measure Light Emitting Diodes (LEDs). Every day we are exposed to more than a million hours of bright light. This creates the need for us to protect our eyes from harmful UV radiation. For the past few years, companies have been working hard to make indoor lighting suitable for use in public spaces.
Although technology is changing at a fast pace, many factors continue to affect the industry. One of them is the use of LED lights in offices and homes. In this article, we’ll help you understand how LED lights work and which one is best for your application. In addition, we will explain what the goniophotometer and integrating sphere are and how they can be used to test LED lighting.
What is a goniophotometer?
The goniophotometer is an instrument that measures light density, luminance, and color. It is generally used to test the bright movement of coordinated light sources such as LEDs and car headlights.
It depends on the directrix of a rotating arm photometer that is equipped with a round mirror. Light is constantly sent to this mirror through various points (as the arm rotates), giving information about the iridescent transition, energy circulation, and productivity of the source.
How to use it?
Place the integrating sphere on a flat surface such as your desk or table. Remove the cap from the optical grade plastic tube piece by unscrewing the polished metal ring about 1 ¼ inch in diameter that houses the ball bearings. Bulb 3 – LED 2 On cigar mix papers under the Integrating Sphere. Using a 5D pen, draw diagonal arrows on the drawing paper, noting the intensity of light (lux) and the color reflected by the drawings of various subjects or materials.
What is an LED? LED uses semiconductor-enriched silicon when it becomes semi-transparent forming electrons in bands known as valence band and electronic structure for injection of hot carriers Quantum mechanics switching between two forms called p-electron and n-conduction Band Theory: Variables (characteristics) Property Value Luminosity Lumen 1000 cd Luminance Lux 7000 lm. Electrical Frequency Electrical: 60 Hz Effective Illuminant Flux 10,800 ANSI 011, 3695 ISO 4892 Color Temperature 1500 – 3500 K SMD LED Lamps Wegner Type Number of LEDs 13 pieces / 5 W Each 30 mm long CURRENT IP 27.8MA/1000.
What are the benefits of using a goniophotometer?
The goniophotometer is a photometer used to estimate the precise dependence of optical quantities, including lights and luminaries. It helps to evaluate radiant force delivery, iridescent movement, luminance spread, spatial shading circulation, UGR table, etc. The goniophotometer provides an estimate of iridescent energy circulation along with the absolute glow motion. In addition, you can measure the absolute glossy movement of smaller and larger sized SSL results.
What is an integrating sphere?
Integrating Sphere is used to help determine the precise location of a light source and split lighting at each point in the space. It has been made by removing the upper lid on which floated some metallic discs that held balls, having in its center another round disc in which we made arcsical glasses or glasses, made up of both ribbons and spherical lenses so that everyone can see what what is it. revealed.
How does it work?
When you leave the cap on, it will release a cone-shaped electron, which shines brighter and transmits light faster to multiple bright spots around places that have been covered in darkness. In Integrating Sphere we will simulate this function. Neon laser waves: Red, blue, and yellow are part of the visible spectrum emission, which resembles white (rainbow) light in violet, and ultraviolet reaches the laser grade of 600 nm with lengths waves shorter than what the human eye can see but with a long enough range to be harmful It is made up of emissive atomic elements called elementary excitation among them are photons emitted by atoms that have had the correct order of energy that react with electrons in a laser. This new little universe contains atoms that emit an invisible light called infrared or ‘thermal’ radiation. (Invisible heat’) generally when it approaches our bodies, penetrating deeper layers heating their cells uniting them.
What are the benefits of using an Integrating Sphere?
The integrating sphere system is suitable for measuring the total luminous flux and color of LED integrated lamps and LED luminaires of relatively small size. The integrating sphere system has the advantage of quick estimation and does not need a boring room. Air development is limited and the temperature inside the circle does not depend on the possible variations present in a temperature controlled room. It should be noted that heat from the SSL element mounted in or on the built-in circle could build up to increase the ambient temperature of the element under test.
Two types of built-in circular frames are used, one using a V(l) set photometer head and one using a spectroradiometer as a finder. Ghostly confusion errors occur with the main technique due to deviation from the overall eldritch responsiveness of the V(l’s) built-in circle light meter, whereas there are hypothetically no ghostly confusion errors with the later strategy.
Blog Conclusion: LED lights are very popular in modern times. But the quality of LED lighting is not good enough. In order to improve the quality of LED lights, we need to use an integrating sphere to test the LEDs. The goniophotometer is a device used to measure the optical properties of a surface by illuminating it with an intense source and measuring the amount of light that passes through it at different angles. The output gives us information about how much light has passed through the material and what kind of wavelength it contains. This knowledge can be used to produce better LED lights for our daily use.
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Categories: Technology
Source: vtt.edu.vn