{"id":2215,"date":"2026-06-18T04:57:38","date_gmt":"2026-06-18T04:57:38","guid":{"rendered":"https:\/\/photo-detector.com\/?p=2215"},"modified":"2026-06-18T04:57:43","modified_gmt":"2026-06-18T04:57:43","slug":"led-del-codificador-personalizado","status":"publish","type":"post","link":"https:\/\/photo-detector.com\/es\/custom-encoder-led\/","title":{"rendered":"Gu\u00eda de LED para codificador personalizado: Sintonizaci\u00f3n de luz azul de 465 nm"},"content":{"rendered":"\n

If you have spent any time designing or troubleshooting rotary or linear optical encoders lately, you have probably run into a physical wall. For decades, standard infrared (IR) emitters at 850nm or 880nm did the job just fine. They were cheap, silicon detectors loved their wavelengths, and nobody really needed sub-micron accuracy for basic industrial motor control. But times have changed. Today, industrial automation, high-speed robotics, and semiconductor manufacturing require extreme precision. We are talking about resolutions that push past 20 bits. When you try to squeeze that level of performance out of an old-school infrared emitter, you hit a physical barrier called diffraction. That is why many engineering teams are shifting their high-end designs toward shorter wavelengths, specifically using a custom encoder LED<\/strong> at 465nm.<\/p>\n\n\n\n

When you try to push the limits of resolution, a generic off-the-shelf blue diode often falls short. Working with a dedicated manufacturer to build a custom encoder LED<\/strong> allows you to tune the exact wavelength, adjust the emission angle, and control the thermal behavior of the diode. Let\u2019s dig into the actual physics, the real-world engineering challenges, and how choosing a custom encoder LED<\/strong> can make or break your industrial sensor design.<\/p>\n\n\n\n

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Why Shorter Wavelengths Matter: The Physics of Precision<\/h2>\n\n\n\n

To understand why a custom encoder LED<\/strong> is so helpful, we need to look at how an optical encoder actually reads position. Whether you are designing a transmissive or reflective system, you are essentially projecting light through or off a fine-pitched grating (the code disc) onto a photodetector array. The photodetector measures the resulting light pattern and translates it into electrical signals, which are then interpolated to calculate position.<\/p>\n\n\n\n

The problem is that light does not like to travel in perfectly straight lines when it passes through tiny gaps. It bends, an effect known as diffraction. This spreading of light waves blurs the pattern on your photodetector array, making it incredibly hard for the sensor to resolve individual grating lines.<\/p>\n\n\n\n

The physical formula for the diffraction limit defines the minimum resolvable feature size:<\/p>\n\n\n\n

d = lambda \/ (2 * NA)<\/code><\/p>\n\n\n\n

In this formula:<\/p>\n\n\n\n