Astronomical telescopes muab faib ua 3 pawg: refractive, Newtonian reflective, thiab refractive.
Hom Refractive: ua ke nrog ntau lub lo ntsiab muag, lub raj pem hauv ntej nkag mus rau lub teeb, thiab lub lens refraction yog qhov loj. Txawm li cas los xij, nws yog txhua yam iav thiab hnyav hnyav.
Yooj yim rau kev khiav lag luam, yooj yim rau siv, haum rau cov pib tshiab, uas yog, tus nqi yog me ntsis kim, tab sis cov duab zoo dua.
Newtonian reflex: tsim los ntawm Newton, feem ntau hu ua nyuj reflex.
Nws siv qhov kev xav ntawm daim iav los nthuav cov duab, thiab hauv qab ntawm lub lens chim yog daim iav concave uas qhia txog lub teeb, vim nws tsuas muaj ib lub hom phiaj lens, yog li nws yooj yim dua kom ua tiav qhov loj aperture.
Hom Refractive: Refractive reflection yog qhov zoo tshaj plaws ntawm kev sib cuam tshuam thiab kev xav.
Nws ntxiv cov iav lo ntsiab muag rau Newtonian iav, thiab cov duab zoo nkauj no feem ntau yog siv hauv kev tshaj lij astrophotography.
