What is the test target?

The test target is a printed or carved pattern used to determine the accuracy of an optical or electrooptical device. Many scientific and consumer instruments rely on optics; Equipment such as cameras, microscopes, spectrometers and light meters rely on lenses that must be carefully calibrated. Test objectives are used to ensure that such devices work as intended and by testing their optical resolution. They are used to ensure the reliability of the device before normal use. Without test goals, there would be no reasonable way to find out whether the optical sensors in devices will degenerate over time. The goal itself contains patterns in a specified resolution; Like the patient of reading the eye table with ever smaller letters, the tested optical device must properly search the formula on the test target and set the boundaries between one pattern and more. Once an optical device can no longer determine the separation point between patterns, it reached its “fracture ". If the resolution limit meets or exceeds the set limit of the device, is reportedly functioning correctly.

In order to test the optical device with a test target correctly, the target itself must be at a higher resolution than the device can read. Setting the higher than the device should be able to achieve to know whether it meets or exceeds the expectations of accurate perception. I try to force a device to read a resolution that should not be able to detect, the user can determine whether the device is calibrated correctly. Test targets are used in factory settings to ensure that new devices meet quality control standards, but also those who rely on optical tools are also used to maintain them in good operation.

The test target can be in different formats. Some are printed on paper while others areu on a glass, quartz or white opal. The formulas themselves also come in different types; The common distribution used is multi -strips and star patterns. Each type of pattern usually has specific use. For example, five -book microscopic patterns are primarily used to determine the output image of cameras and lenses.