kaugmõõdikud

Kaugmõõdikud, often translated as rangefinders, are optical instruments used to determine the distance to a distant object. They are employed in various fields, including surveying, military applications, photography, and sports. Historically, rangefinders relied on principles of trigonometry. One common type uses a coincidence principle, where the observer looks through two separate eyepieces, each viewing the target from a slightly different angle. By adjusting a prism or mirror within the instrument, the two images are brought into alignment. The distance is then calculated based on the angle of adjustment and the known distance between the two viewing points of the instrument (the baseline).

Another type of rangefinder is the stereo rangefinder. This device uses two lenses separated by a fixed distance, mimicking the way human eyes perceive depth. By analyzing the disparity between the two images of the same object, the rangefinder can calculate the distance. More modern rangefinders often utilize laser technology. A laser beam is emitted towards the target, and the time it takes for the reflected beam to return is measured. Knowing the speed of light, the distance can be precisely calculated. These laser rangefinders are highly accurate and are now widely used in many professional and recreational activities.