LED Diode "glass"

[Hallmar]

What's that glass that goes over the LED and where can i get it?

I think that it would look really cool on my future pedals.

[Kipper4]

I believe its called a bezel and theres loads on Ebay.
good luck

[Hallmar]

I believe its called a bezel and theres loads on Ebay.
good luck

Thanks so much!

Gonna look into it.

[Kipper4]

Glad to be of help.
I know very little about pedal building as yet but i'm learning everyday.
Thanks to everyone here. So i'm especially glad to be able to give some back.
You are welcome.

[kodiakklub]

its probably not something that goes over the led after the fact or a bezel, but rather the shape of the actual LED. look around mouser for different shapes of LED's. maybe use the word barrel when you google it.

[nocentelli]

Fresnel lens?

[kodiakklub]

no a fresnel is the type on a lighthouse light. it has ridges to spread the beam.

[kodiakklub]

http://www.tme.eu/en/details/ospw53e1a-jk/tht-leds-5mm/optosupply/#
they got'em in europe!

ps. so bored at work......

[R.G.]

Fresnel lenses are made by noting that the light is only bent at the surface of the lens, where it goes from air with a refractive index of X to glass where the index is Y. Fresnel lenses subtract out the "constant glass" under the curve and present only the curved part, resetting the slopes from time to time to thin the total amount of glass down.

[buildafriend]

fresnel is also a kind of light commonly used in film production or photography for a more vintage look.. just throwing that out there.

[PRR]

> a fresnel is the type on a lighthouse light. it has ridges to spread the beam.

Fresnel is a general way to save a LOT of glass with low image quality.



It is a poor camera lens but dandy for focusing lights where we don't want an exact image of the flame or filament.

They _can_ be made diverging (spread) or converging (tighten) but I have never seen a diverging Fresnel. They are incredibly popular for turning an omnidirectional light into a narrow beam.

Which is what some LEDs did: cast a Fresnel into the top for a tight beam, high light intensity on-axis and low light intensity outside the beam.

That thing in the thread-top picture looks to me like a little bezel, not a Fresnel bezel and not a naked LED. (And surely not glass?)

[~arph]

Pretty much all of the component stores have these... Example

http://www.banzaimusic.com/Lens/

[bluebunny]

A bit OT, but (ahem) enlightening nonetheless...

It is a poor camera lens ...

I have one of these.  Essentially has back-to-back Fresnel lens elements to "cancel out" chromatic aberrations.  Also makes the lens much shorter than it would otherwise be.

[PRR]

> I have one of these.

You mean their "Diffractive Optical (DO) element" is a Fresnel??

I stand corrected.

[armdnrdy]

I would like to clarify that "fresnel" is a place in California between Los Angeles and Sacramento!! 

[bluebunny]

> I have one of these.

You mean their "Diffractive Optical (DO) element" is a Fresnel??

I stand corrected.

I believe so.  On a microscopic scale, and two that fit together back-to-back.  Could be wrong, of course.  Or misled by those pesky folks at Canon!  Didn't stop me buying it.       Wasn't cheap then, and it's way more expensive several years on.  But very pleased with it, along with most of my other Canon kit.

This is a photo forum, right?   

[mth5044]

I would like to clarify that "fresnel" is a place in California between Los Angeles and Sacramento!! 

Don't joke about Fresno... I hate that place 

[cpm]

i use this one:
http://es.mouser.com/Search/ProductDetail.aspx?R=CLF280CTPvirtualkey59300000virtualkey593-2800C

[PRR]

> "fresnel" is a place in California

There is no "s" sound in Fresnel. Augustin-Jean Fresnel was French. "fray-NEL" is a fair approximation for our tongues.

At least that's what I was taught in physics and hanging around theater. I'm sure some say "FRESnel".

> I believe so.

Reading Canon's bumph, it's hard to know what it is. I read it as being much finer than what Fresnel did. That the "steps" are wavelength-size, while Fresnel was tryng to take a ton of glass out of huge lenses in great chunks. Also a lens could be assembled from handy-size glass pieces instead of one huge blob. That 5% of the light goes astray is not a big deal for lighthouse (or theater-lamp) use, compared to the issues of a single lens.

[kodiakklub]

> "fresnel" is a place in California

There is no "s" sound in Fresnel. Augustin-Jean Fresnel was French. "fray-NEL" is a fair approximation for our tongues.

At least that's what I was taught in physics and hanging around theater. I'm sure some say "FRESnel".

no we in the theatre biz say "FRUH - nel". we all are aware that the S is not pronounced. at least on broadway anyway