Armed with this information, we can help determine exactly what equipment you need to achieve success.ĪSP takes the risk of COVID-19 seriously. This includes Inventory Management, Portable Barcode Readers, Supply Chain Management, Time and Attendance and Asset Tracking to name but a few.ĪSP Microcomputers is here to help you run your operations in a smooth and convenient manner by providing you with the right equipment for your company needs.Ĭontact us so we can sit down and discuss your goals, needs, and business structure. If you would like to know more about the best stocktake software and how the right set of software and point of sale systems could help you, give us a call.ĪSP Microcomputers are the market leader when it comes to the development of customised and packaged solutions. However, you may find that some lasers make use of green light, and this is because some barcodes cannot be read by a red light. With longer wavelengths, red colours are also much more responsive to barcode scanners. With this, barcode scanners make use of red light to scan barcodes, mainly because lasers that produce red light are known to be much cheaper. We can see how technology has truly transformed the way we live our lives every day! Today, barcodes have made our lives much more convenient, making checking out at the grocery store as efficient as it can be. However, there are some barcode scanners that use green light because some barcodes cannot be read by red light. Using a blue light will require a more expensive and specialised laser. Red light is also known to have longer wavelengths, which are advantageous because photodiodes, or the reader of the scanner, are known to respond better to these types of wavelengths, Technically, barcode scanners can use any colour of light however, red lasers are significantly cheaper and much simpler in comparison to other colours. Why does this matter? Well, if you use different materials as the semiconductor, this may lead to different band gaps which ultimately produces different wavelengths of light or basic colours.īarcode scanners are known to use red laser diodes because laser diodes that emit red light are known to be much cheaper to produce, hence the reason why many barcode scanners use red light.Įssentially, it is all due to economic reasons. Once the current flows to the p-n semiconductor junction of the laser, then a light will be generated and emitted. Laser diodes are also known as a semiconductor laser, which is capable of causing laser oscillation by flowing electric currents to a semiconductor. You’d be surprised to know that the answer is simple: red light is more economic! Barcode scanners like the ones typically found in supermarkets make use of lasers that are known as “diode lasers.”ĭiode lasers are known for their ability to operate from electrical power and, of course, for their small size, which contributes to a lot of conveniences. So, Why Do Barcode Scanners Use Red Light? Smartphones and image scanners are able to read 2D barcodes, and not 1D barcodesĪs such, barcode scanners work by scanning a red light onto a barcode to interpret the code and decipher information about the product itself. The second type is 2D barcodes, which are known to be more complex and can include more information such as quantity, price, and even images. The first type is the 1D barcodes, which makes use of lines that store information like product type, colour, and size. Generally, barcodes can be classified into two types. The check digit is the digit that tells you whether or not the encoded barcode data is correct. They differ depending on what type of barcode is at hand.ģ). The start and stop characters, as the name suggests, are the characters that are found at the beginning and the end of the barcode data. Quiet zones must be appropriately sized in order for the barcode scanner to be able to read barcodes sufficiently.Ģ). The minimum distance between two barcodes, or the outermost bar of one barcode to the next, is around 2.5 millimetres. The quiet zone is the margin located at both ends of a barcode. Barcodes are often placed on packages of products sold in numerous settings, like grocery stores, convenience stores, shopping malls, and much more.īarcodes are composed of three different parts. They are very useful for the swift identification of different products. If you want to learn more about what barcode scanners are and why they use red light, then please keep on reading to learn more! First Off, What’s A Barcode?Ī barcode is a representation of numerals and characters that consist of bars and spaces at varying width which are readable by machines, or barcode scanners. Have you ever been in line at the supermarket and noticed that when you scan your items a red light comes out? These red lights come out of barcode scanners, and the reason why they are red is actually quite simple!
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