Name: レンズメーターの使い方 - シンプルな球面単焦点レンズ (How To Use The Lensmeter - A Simple Spherical Single-Vision Lens)
Uploaded: 2021-01-14T08:01:15.000Z
Duration: 10 min 37 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

- Hello and welcome to part two in our ongoing series

From this point forward, in this particular series,

you're gonna be working with our Learn the Lensmeter kit.

The kit is available online at the OpticianWorks website.

The booklet starts with a review of what's in the kit.

where you'll just learn how to move a lens around

and what you see when you look in the lensmeter.

You can start learning how to use the power drum.

Then we'll jump into some job order forms

and actually look at a single-vision lens,

a line bifocal, and a progressive, loose lenses.

And then last, we'll wrap up with three examples

We're gonna do a really brief whiteboard session

you've never worked with a lens, first time,

it really helps us to kinda get the big picture of things.

Two housekeeping items before we move on.

Remember that a manual lensmeter is a subjective tool.

and I can turn knobs and I can turn power drums,

and you're gonna have Bob the optician come say,

and then Sue's gonna come in behind him, go,

no, it's not, it's fine, just keep going.

So, just always keep that in the back of your mind.

it costs a lotta money, you drove 65 miles to get there,

if you do not do your focus for individual use

before you jump into your layout or verification work,

Make sure you watch the video before this,

so you know how to do that and do it before you begin.

There are four things we're gonna talk about.

and it's a grid of three, four, five concentric circles.

The one line here that goes across, you can move

but it can only move in the zero 180 plane.

It doesn't move anywhere in this direction.

rotate the power drum till you see that pattern.

You should see three thin lines and three thick lines.

They should be in focus and if your lensmeter

is calibrated correctly, everything was working right,

should be in the perfect center of this smallest ring,

is going to be to get this on target in here,

Your three thin lines of this pattern are your sphere lines.

They are going to be in focus when you are

of the sphere and the cylinder value together.

if I have a lens in the lensmeter, as I move

the lens around, this is gonna move all over the place.

字幕リスト動画再生

レンズメーターの使い方 - シンプルな球面単焦点レンズ (How To Use The Lensmeter - A Simple Spherical Single-Vision Lens)

eventually

grab

pattern

practice