Prinsip pengintai
Laser rangefinders generally use two methods to measure distance: pulse method and phase method. The process of pulse method ranging is as follows: the laser emitted by the range finder is reflected by the object to be measured and then received by the range finder, and the range finder records the time of the laser round trip at the same time. Half the product of the speed of light and the round-trip time is the distance between the rangefinder and the object being measured. The accuracy of the distance measurement by the pulse method is generally around plus /- 1 meter. In addition, the measurement blind area of this type of rangefinder is generally about 15 meters.
D=ct/2
Dalam rumus:
D--the distance between the two points A and B of the measuring station;
c--kecepatan cahaya yang bergerak di atmosfer;
t--waktu yang dibutuhkan cahaya untuk melakukan perjalanan bolak-balik antara A dan B sekali.
Dapat dilihat dari rumus di atas bahwa untuk mengukur jarak antara A dan B sebenarnya adalah untuk mengukur waktu t perambatan cahaya. Menurut metode waktu pengukuran yang berbeda, pengintai laser biasanya dapat dibagi menjadi dua bentuk pengukuran: tipe pulsa dan tipe fase.
