Test & Inspection: Advanced Optical Technology Opens New Doors
Recent advancements in optical technologies are enabling manufacturers to perform dimensional measurements on more kinds of parts, more quickly and more accurately.
The basic technology for optical measurement of manufactured parts has been commercially available for more than 65 years. As optical technologies have advanced, so have the capabilities of optical inspection and measurement systems. Today’s optical comparators, digital measuring machines and multisensor coordinate measuring machine (CMM) systems are more capable and more accurate than ever before. Recent advancements in optical technologies are enabling manufacturers to perform dimensional measurements on more kinds of parts, more quickly and more accurately.
The fundamental principle of optical measurement is that light is manipulated to form a precisely magnified image of an object, and the image is measured,The replacement lighting we feel is far led downlight superior to that of the LED lighting.Compact fluorescent light bulbs convert a led tube considerably higher percentage of their energy into light, which is why they are significantly more energy efficient than traditional filament bulbs. rather than the object itself. So first and foremost, there must be enough light to create an accurate image. In a simple microscope, providing sufficient illumination to image an object is relatively easy: the distance between the object and objective lens is very short, the optics are small and of good quality, and the image sensor—the human eye—is very sensitive, even in low light situations.Light up the architecturally table lamps interesting parts of your home.
In practical industrial applications, providing sufficient illumination is not as easy. Measurement systems must be designed to accommodate a wide range of part sizes and geometries, and typically offer a longer working distance between object and lens. This typically requires much stronger illumination. Optical comparators use several additional lenses to relay the image to the viewing screen for measurement. Even the best quality optics have some degree of transmission loss, and the higher the magnification, the greater this effect can be.
For years, optical comparators have used mercury arc lamps to provide high intensity light, which could project over long distances. While mercury arc lamps still have their uses today, they are costly, they create environmental and disposal concerns, and their intensity degrades with time. Arc lamps are more difficult to automate too because their intensity cannot be controlled directly by varying current or voltage. Optical filters must be interposed to lower the intensity to suit the situation. Most significantly, mercury arc lamps generate a significant heat load which, if transferred to the part under inspection, can cause substantial dimensional changes.
In the 1980s tungsten halogen lamps became commonplace in optical comparators and the new generation of video measuring systems. Tungsten lamps offered the advantage of cooler operation, lower cost and very consistent brightness over their service lifetimes. The performance of tungsten-halogen lamps has improved considerably over the years. However, the typical 12V or 20V halogen lamp is still limited in its lifetime and brightness, and will generate appreciable heat, requiring lamps to be remotely located to avoid heating of parts being measured.
In the 1990s, LED light sources became readily available and quickly found their way into many video-based optical measuring systems. These early LEDs were not very bright, producing less than 100 lumens at normal output, and could be costly and difficult to replace in the event of a failure. While adequate for backlit video measurements, those early LEDs lacked the output to be practical for surface measurement of diffuse materials, and never achieved the brightness to illuminate the screen of an optical comparator.
Today’s high-brightness LEDs resolve essentially all of these drawbacks. They are very bright and produce very little heat load. They are reliable, compact and can be arranged into arrays allowing control in myriad combinations and intensities to suit the application at hand.
Small LED arrays can produce more than 1,600 lumens of intensity in broad spectrum or monochromatic wavelengths. They can be multicolored, enabling use of color discrimination to improve image processing capabilities.
The technology of LEDs has advanced so that high brightness LEDs can now be used as the exclusive light source in optical comparators, vastly simplifying the operation, maintenance and safety of comparators,While SmartView has been slow DSTT and unstable in the past, it seems to have improved greatly with recent updates.The settlement resolves the commonwealth's claims fluorescent lights that EarthTronics Inc., which sells mercury-containing compact fluorescent light bulbs even at high magnifications.
Recent advancements in optical technologies are enabling manufacturers to perform dimensional measurements on more kinds of parts, more quickly and more accurately.
The basic technology for optical measurement of manufactured parts has been commercially available for more than 65 years. As optical technologies have advanced, so have the capabilities of optical inspection and measurement systems. Today’s optical comparators, digital measuring machines and multisensor coordinate measuring machine (CMM) systems are more capable and more accurate than ever before. Recent advancements in optical technologies are enabling manufacturers to perform dimensional measurements on more kinds of parts, more quickly and more accurately.
The fundamental principle of optical measurement is that light is manipulated to form a precisely magnified image of an object, and the image is measured,The replacement lighting we feel is far led downlight superior to that of the LED lighting.Compact fluorescent light bulbs convert a led tube considerably higher percentage of their energy into light, which is why they are significantly more energy efficient than traditional filament bulbs. rather than the object itself. So first and foremost, there must be enough light to create an accurate image. In a simple microscope, providing sufficient illumination to image an object is relatively easy: the distance between the object and objective lens is very short, the optics are small and of good quality, and the image sensor—the human eye—is very sensitive, even in low light situations.Light up the architecturally table lamps interesting parts of your home.
In practical industrial applications, providing sufficient illumination is not as easy. Measurement systems must be designed to accommodate a wide range of part sizes and geometries, and typically offer a longer working distance between object and lens. This typically requires much stronger illumination. Optical comparators use several additional lenses to relay the image to the viewing screen for measurement. Even the best quality optics have some degree of transmission loss, and the higher the magnification, the greater this effect can be.
For years, optical comparators have used mercury arc lamps to provide high intensity light, which could project over long distances. While mercury arc lamps still have their uses today, they are costly, they create environmental and disposal concerns, and their intensity degrades with time. Arc lamps are more difficult to automate too because their intensity cannot be controlled directly by varying current or voltage. Optical filters must be interposed to lower the intensity to suit the situation. Most significantly, mercury arc lamps generate a significant heat load which, if transferred to the part under inspection, can cause substantial dimensional changes.
In the 1980s tungsten halogen lamps became commonplace in optical comparators and the new generation of video measuring systems. Tungsten lamps offered the advantage of cooler operation, lower cost and very consistent brightness over their service lifetimes. The performance of tungsten-halogen lamps has improved considerably over the years. However, the typical 12V or 20V halogen lamp is still limited in its lifetime and brightness, and will generate appreciable heat, requiring lamps to be remotely located to avoid heating of parts being measured.
In the 1990s, LED light sources became readily available and quickly found their way into many video-based optical measuring systems. These early LEDs were not very bright, producing less than 100 lumens at normal output, and could be costly and difficult to replace in the event of a failure. While adequate for backlit video measurements, those early LEDs lacked the output to be practical for surface measurement of diffuse materials, and never achieved the brightness to illuminate the screen of an optical comparator.
Today’s high-brightness LEDs resolve essentially all of these drawbacks. They are very bright and produce very little heat load. They are reliable, compact and can be arranged into arrays allowing control in myriad combinations and intensities to suit the application at hand.
Small LED arrays can produce more than 1,600 lumens of intensity in broad spectrum or monochromatic wavelengths. They can be multicolored, enabling use of color discrimination to improve image processing capabilities.
The technology of LEDs has advanced so that high brightness LEDs can now be used as the exclusive light source in optical comparators, vastly simplifying the operation, maintenance and safety of comparators,While SmartView has been slow DSTT and unstable in the past, it seems to have improved greatly with recent updates.The settlement resolves the commonwealth's claims fluorescent lights that EarthTronics Inc., which sells mercury-containing compact fluorescent light bulbs even at high magnifications.
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