Yuav txiav txim siab seb cov looj tsom iav puas tsim nyog?

Lub luag haujlwm ntawm cov looj tsom iav dub nyob ntawm seb lawv puas tsim nyog lossis tsis tau. Tsuas yog cov looj tsom iav uas tsim nyog tuaj yeem tiv thaiv cov kab hluav taws xob ultraviolet, lub teeb xiav thiab muab kev zoo siab rau kev pom. Yog li yuav ua li cas txiav txim siab seb cov looj tsom iav puas tsim nyog?

1. Cov looj tsom iav dub uas tuaj yeem tiv thaiv qhov muag zoo tuaj yeem thaiv 99 feem pua ​​​​rau 100 feem pua ​​​​ntawm UVA thiab UVB, thiab lim 75 feem pua ​​​​rau 90 feem pua ​​​​ntawm cov teeb pom kev zoo. Yog li ntawd, looj tsom iav dub tsim nyog yuav tsum muaj peev xwm tiv thaiv tau 99 feem pua ​​​​ntawm cov kab hluav taws xob ultraviolet thiab lim ntau dua 75 feem pua ​​ntawm cov teeb pom kev zoo. Koj tuaj yeem kuaj qhov no los ntawm:

Sim nws los ntawm kev sawv ntawm daim iav. Yog tias koj tuaj yeem pom koj ob lub qhov muag tau yooj yim hauv daim iav los ntawm lub lens, nws txhais tau tias cov xim ntawm cov looj tsom iav dub tsis tsaus txaus, thiab cov teeb pom kev lim dej kuj me me. Tau kawg, muaj ntau yam khoom qab zib - cov looj tsom iav dub tam sim no. Nws tsis tuaj yeem hais tias cov looj tsom iav dub tsis tsim nyog, uas yog, cov nyhuv zoo nkauj yog ntau dua.

2. Cov looj tsom iav dub yuav tsum xyuas kom meej tias lawv yuav tsis ua rau muaj kev cuam tshuam los yog tsis pom kev, txwv tsis pub nws yuav ua rau kiv taub hau thiab lwm yam tsis xis nyob thaum hnav.

Kev sim txoj kev: Tuav lub looj tsom iav dub, ncab caj npab, saib lub kaum sab xis lossis txoj kab ncaj nraim (xws li lub qhov rooj, qhov rais) nyob deb ntawm lub lens, txav tus ncej maj mam nce thiab nqis, sab laug thiab sab xis, yog tias pom pom. yuav twisted, skewed los yog khoov, nws txhais tau hais tias lub lens muaj optical tsis xws luag thiab tsis tsim nyog.

3. Cov xim ntawm cov looj tsom iav dub yuav tsum tsis sib xws. Yog hais tias ib qho chaw dheev dhau los ua tsaus, nws yeej tsis tsim nyog.

Tsis tas li ntawd, qhov hnyav ntawm cov looj tsom iav dub yuav tsum sib npaug ntawm lub qhov ntswg thiab pob ntseg. Thaum hnav, peb yuav tsum ua tib zoo kho qhov curvature ntawm lub thav duab thiab txoj hauj lwm ntawm lub qhov ntswg pads kom paub tseeb tias tus ncej tsis pinch tus choj ntawm lub qhov ntswg los yog hnav pob ntseg, thiab cov plaub muag yuav tsum tsis txhob kov lub looj tsom iav dub. Cov saum toj no yog qhov yooj yim Ob peb txoj kev ntawm kev txiav txim seb lub looj tsom iav dub puas tsim nyog