Measuring Optical Flats OLD SCHOOL!

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Measuring Optical Flats OLD SCHOOL!

Рет қаралды 453

Күн бұрын

In this video I explain how I measure the flatness or form error of optical surfaces using interferometry as well as a precision mechanical probe. I also demonstrate how I have constructed a compact inspection booth which I use for inspecting the surface quality as well as surface form accuracy. In this video I show you how to measure to less than 0.03 microns in the home shop!

Пікірлер: 8

@erok268 3 ай бұрын

Very cool. I have a couple soviet era optical flats. Ive literally have used them at work once. But when i busted them out with my homebuilt flashlight to check just 2 features that were in question my boss was trying to go from customer is always right and you ducked up to then saying well i should have known by your confidence in your voice that you had a way to check them right. The customer who was there was like my sales engineer insists its not right. Turns out he was using what it "felt like". Whats funny is that that was the first time and only time ive used them as in i never checked the parts originally with the flats. Best 60 bucks ive spent on random metrology tools. Watching your bosses face react in real time priceless.

@opticalmechanic 3 ай бұрын

Ha ha, nice. Yep, fringes don’t lie.

@MarkATrombley 3 ай бұрын

I watched the entire video but it still seems like magic.

@opticalmechanic 3 ай бұрын

It is. Optical magic! 🪄 😎

@procactus9109 3 ай бұрын

Awesome... Comment for the sake of a comment

@opticalmechanic 3 ай бұрын

Thanks for watching and for commenting 😀

@hisuiibmpower4 3 ай бұрын

is perpendicularity of the probe to 3 ball defined surface critical?and how do u ensure it

@opticalmechanic 3 ай бұрын

This is controlled by the squareness or perpendicularity of the spherometer ring. The bore that locates the dial gauges needs to be machine true to the ring that locates the balls (if it is that type of ring) or the edge of the ring if a solid type. Both perpendicularity and concentricity are important especially if a radius is being measured.