muaj qhov sib txawv ntawm qhov hu ua "kev nyab xeeb" thiab "tsis muaj kev nyab xeeb" laser rangefinders?
Raws li lub npe qhia, laser rangefinders ua haujlwm nrog lasers ua cov khoom tseem ceeb ua haujlwm. Tam sim no, cov ntaub ntawv ua haujlwm ntawm cov khoom siv ntawm tes laser rangefinders ntawm kev ua lag luam feem ntau suav nrog cov hauv qab no: semiconductor lasers nrog ua haujlwm wavelengths ntawm 905 nm thiab 1540 nm, thiab YAG lasers nrog ua haujlwm wavelengths ntawm 1064 nm. Lub wavelength ntawm 1064 nanometers yog teeb meem rau tib neeg cov tawv nqaij thiab ob lub qhov muag, tshwj xeeb tshaj yog yog hais tias lub qhov muag raug yuam kev ntawm lub laser ntawm 1064 nanometers, kev puas tsuaj rau lub qhov muag tej zaum yuav mus tas li. Yog li ntawd, nyob rau hauv txawv teb chaws, lub 1064-nanometer laser yog kiag li banned nyob rau hauv lub handheld laser rangefinder. Hauv Suav teb, qee lub tuam txhab kuj tsim 1064-nanometer laser rangefinders.
Rau 905nm thiab 1540nm laser rangefinders, peb hu lawv "kev nyab xeeb". Rau 1064 nm laser rangefinder, peb hu nws "tsis muaj kev nyab xeeb" vim tias nws muaj peev xwm ua rau tib neeg lub cev.
