Cov txheej txheem:
![Koj siv lub lensometer kauj ruam li cas? Koj siv lub lensometer kauj ruam li cas?](https://i.answers-medical.com/preview/medical-health/14062669-how-do-you-use-a-lensometer-step-by-step-j.webp)
Video: Koj siv lub lensometer kauj ruam li cas?
![Video: Koj siv lub lensometer kauj ruam li cas? Video: Koj siv lub lensometer kauj ruam li cas?](https://i.ytimg.com/vi/_9-40PVJzO0/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Yuav siv phau ntawv Lensometer li cas
- Teeb lub tsom iav qhov muag ntawm qhov chaw ruaj khov.
- Tig lub eyepiece maj mam counterclockwise kom txog thaum tus ntoo khaub lig dub ua kom meej meej kom pom cov eyepiece ntawm thaj chaw tso saib.
- Tig lub ntsuas lub log kom ntsuas qhov ntsuas ntawm xoom.
Tib neeg kuj nug, ua li cas koj ntsuas lub lensometer?
Tshawb xyuas lub zog calibration
- Qhib lub lensmeter.
- Tig lub qhov muag qhov muag kom lub qhov muag pom hauv qhov ua kom pom tseeb.
- Tig lub zog log rau hauv qhov ntxiv, tom qab ntawd maj mam txo lub zog kom txog thaum lub hom phiaj lensmeter tsom mus rau qhov ntse.
- Yog tias lub log fais fab tsis nyeem xoom, rov tsom mus rau lub qhov muag thiab rov txheeb xyuas qhov ntsuas.
Tsis tas li ntawd, leej twg tsim lub lensometer? Nyob rau hauv 1921 lub 'AO Lensometer ' tau patented los ntawm 40-xyoo-laus Edgar Derry Tillyer sawv cev ntawm American Optical Company. Qee qhov debatably qhov no tau lees tias yog thawj lub cuab yeej tso cai rau kev ntsuas lub zog ntawm lub lens thiab yog li xyuas qhov tseeb ntawm cov tshuaj.
Tsis tas li ntawd, lub lensometer tsis ntsuas dab tsi?
Vim li no, a lensometer tsis tiag tiag ntsuas qhov tseeb focal ntev ntawm lub lens, uas yog ntsuas los ntawm cov dav hlau tseem ceeb, tsis los ntawm daim iav nto. Cov tsom iav qhov muag ua haujlwm ntawm lub hauv paus ntsiab lus Badal nrog rau qhov sib ntxiv ntawm astronomical telescope rau kev paub meej ntawm cov kab hluav taws xob sib luag ntawm qhov nruab nrab.
Lub zog lens ntsuas li cas?
Lub diopter yog chav tsev ntawm ntsuas rau refractive hwj chim ntawm a lens . Cov hwj chim ntawm a lens txhais tau tias yog qhov sib txuam ntawm nws qhov ntev focal hauv meters, lossis D = 1 / f, qhov twg D yog qhov hwj chim hauv diopters thiab f yog qhov ntev ntawm qhov ntev hauv meters.
Pom zoo:
Koj yuav ua li cas thiaj ua tau lub txaj nyob hauv ib kauj ruam?
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Tom qab ntawd, ua raws cov theem no: Yob tus neeg mob maj mam muab rau nws sab, kom ntseeg tau tias tus neeg mob yuav tsis poob. Unfold ib daim ntawv huv si thiab muab tso rau ntawm ib feem ntawm lub txaj uas tsis tau ua. Maj mam muab tus neeg mob tso rau ntawm lwm sab ntawm lub txaj kom lawv pw ntawm qhov huv, ntaub ntaub xaws
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Cov zaub mov hla cov txheej txheem zom zaub mov hauv qab no: Qhov ncauj. Txoj hlab pas. plab. Cov hnyuv. Colon (cov hnyuv loj) Rectum
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