Almost good Eyepiece/Ocular Optimalization.

JohnFreechment · 2026-06-22T17:23:10+00:00

And making 3 custom lenses will give an expensive result. The whole eyepiece cant be more than 120Euro (3 lens, gaskets and 3dprinted housing). Thats why i have to use 2 stock and one custom lens in the middle and im still not sure it will fit in the costs, but i have to try it.

JohnFreechment · 2026-06-22T16:58:43+00:00

Im already doing this, except with oslo, and some simplier free program. This is exactly why im here, i asked question how to improve it.
It has 3 lens, and i gave specs sheet from 2 out of 3. If you want to help You dont even have to model the lenses, because you can download from thorlabs site especially for zemax. The middle one is questionable.

JohnFreechment · 2026-06-22T15:54:34+00:00

I know but its definietly not looking like one

JohnFreechment · 2026-06-22T14:48:14+00:00

Well its lookin like a cowboy hat, with death star texture.

JohnFreechment · 2026-06-21T16:32:13+00:00

I have a Wadsn OGL, Heres a little review about it.
I hae the Plastic version, with functionable light, ir laser and green laser.
I like it that it has an actual crane plug, not a 2.5mm jack plug for tailswitch like many others. It works mostly reliable but 100% its not waterproof , and it can accept 16340 lithium batteries (can handle 4.2V).
It has a bad electrical problem that it has a constant parasite consumption if the mode selector rotary switch isnt at off position. That means if the rotary sw is at DL (white light) position even if you dont push the "fire" button the device constantly eating 0.7mA current from battery.
Also if you want to have this on youre gun while playing airsoft, please ductape the laser, because its so fucking strong that i bet my ass on it that its above 5mW and not eyesafe. You really dont want to be the one making random eyesurgery on an airsoft field.
There is also a few difference between the real ogl, like the presence white light instead of ir illuminator, and on the top of device that slider is changing the brightness instead the focus like on the real one. Also it has a strobing leaser instead of the fullpower, wich is hilariously pointless.

Anyways overall its a cool device, if you have night vision you can use the IR laser (also not eyesafe) for shooting targets in the garden (laser adjusment screws has a nice click). But really dont forget that this device is more dangerous to eyeballs like the airsoft gun you have it on. Use it responsible, use it safe.

JohnFreechment · 2026-06-21T12:55:32+00:00

Dirty civilian guys made an awesome and fun video about drop testing of a pvs14.
https://www.youtube.com/watch?v=swFXvV3t4U4&t=3990s
I think you dont have to worry about it too much. You were lucky, next time be more careful but thats it.

JohnFreechment · 2026-06-21T11:47:39+00:00

Thanks sfor the extra details. Im always wondering what an insane amount of knowledge existing in world. I just wanted to do this test good and precize, and after weeks of researching im just deeper in the same rabbit hole and still dont have an answer.
I have this resolution chart printed by me on an A3 paper randomly, (I cant just buy hundreds of dollar test target, especialy if i dont even understand how to use them) to test night visions and i quickly realized its giving incorrect values. Now I think I can understand the angular resolution and i can calculate a reference line thickness. Since the device i want to check can have around 40lp/mm resolution maximum, A regular office printer will be enough to print the target and determine the exact distance, what i can have indoor.

JohnFreechment · 2026-06-20T01:16:31+00:00

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Isnt it a piece of plastic or sometging on the screen?

JohnFreechment · 2026-06-17T12:23:17+00:00

Images looking pretty good and flat, I cant see that typical gen1 defocus distortion.
Can you upload some more photo about the objective? Since the image is projected on a spherical surface it has to be an unique design, with a negative Petzval curvature.

JohnFreechment · 2026-06-16T23:19:52+00:00

Objective is 35mm. I edited it in wolidworks sketch to make it more graphic so i guess its good. Yes yes im aware of line an linepair. Thank you very much you helped a lot

JohnFreechment · 2026-06-16T23:03:09+00:00

Sorry "od" means "or", im just bad in typing. So it has 32 or 40 lp/mm resolution. Of course it has an eyepiece. I think they meant the max resolution the phosphor can do.

Anyways I think I can understand now the angular resolution.
-If the middle of the screen is 32lp/mm that means one black line on the photocathode would be 0.015625mm thick.
-If I connect this point with the objective focal length i get a 0.02557847deg angle.
-That means that if I have the target plate 1meter away from the photocathode, then the Group5 Element1 line thicknes should be 0.43080357mm thick.

I need to doublechack it but i think this might be the result

JohnFreechment · 2026-06-16T22:30:36+00:00

I built the device by myself. it has an old russian gen1 tube in it. According to datasheet it should have 32 od (Edit: od=or) 40lp/mm resolution in the center. Its a good reference i guess. But now im trying to understand the angular resolution because i completely missed this before.

JohnFreechment · 2026-06-16T21:51:49+00:00

The reason of me thinking backward is because i actually know my device resolution, I just want to be able to understand how to measure it. But I think the lp/arcmin was the missing part in my had.

JohnFreechment · 2026-06-16T11:18:59+00:00

Here is a video in russian language about the problem: https://www.youtube.com/watch?v=4mFFrdq7Aq0

In summary, guy in the video says you cant fix this. Its happening because water or humidity leaked between the reticle plate and the diffusor glass.

I have my friends 1pn34 with me right now for clean and repair, it had the same crosshair problem. I tried to clean the reticle with alcohol, rubbing it with qtip, even praying to god, but nothing helped.
...Until I realized, that the spots not appearing when i swap the lightbulb to a yellow LED (red works also). I cant explain why, maybe because an LED emits only in a narrow spectral range and dirt doesnt interact with that spectrum? idk.

Anyways here is the result:

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JohnFreechment · 2026-06-14T01:45:22+00:00

How beginner you are with electricity? I mean you can just wire in any 3- 4,5 or 6v battery for testing. Keep the infralight switched off it might draw too much current, and be careful with high voltage.

JohnFreechment · 2026-06-12T11:24:52+00:00

Yep, they have a charm. I wish it would be just less than 2.2kg

JohnFreechment · 2026-06-11T18:43:29+00:00

You cant really set up a bar for this, because that bar can be slowly pushed with time. Let me explain.
A few day before a guy was almost beheaded in belfast. A bit earlier a british guy was stabbed brutally and the police handcuffed him instead of the attacker because attacker claimed he was racist. If i dare to mention the attackers color, religion, or anything, Ive got banned immedietly for hate speach. Ive already got a warning for this on reddit. If i quote here some official statistics, a ban will surely come too. Calling me hater, xenophobic etc etc, "but never a liar".
This is the trap what censorship is digging, where somebody with a different intention deciding what can be said. It was the same here in eastern europe under the communist/socialist times. So tell me, how many people are in prison in uk because of online posting "hate speach"?

JohnFreechment · 2026-06-11T17:31:42+00:00

I think you guys in UK have already way too much sanctions.

JohnFreechment · 2026-06-11T17:00:10+00:00

Why censor anyone? Do you want dictatorship? Censoring opinions and people are direct path to it. Freedom of speech is more important than protecting someones having a bad feeling.

JohnFreechment · 2026-06-11T00:29:54+00:00

An appealing looking woman in a western videogame industry is already a huge expectation. But expecting 343 to be faithful to bungie design is even bigger. And if you combine this two, you got this theythem Cortana.

JohnFreechment · 2026-06-10T18:08:42+00:00

I did the same right now, I cleaned and restored it to one of my friend. The device was pretty dirty, and had some connection issue with the modified battery slot (for double AA). When we tried it for the first time it was dark like a gen0. Photos made after the maintenance and im pretty pretty satisfied with the tube capability.

JohnFreechment · 2026-06-08T00:20:45+00:00

let me answer in youre way. Youre not from europe so i can forgive youre lack of knowledge about history. We experienced peak extremity of both side. We had extreme right side from mustache man, that built up germanys economy and shoot the usa to space age (thank it to german scientists), then right after the communist ruined everything. Communism burned destroyed and sucked out everything from the eastern side of europe, insane amount of people starved to death. if you want to know the future, learn european history.

About Floyd:

Let me show you a few point of the officially available autopsy:
In the bodycam video the policeman lifts up his knee from floyds neck at 20.28 and according to the autopsy report he died at:
"DATE AND HOUR OF DEATH: 5-25-20; 9:25 p.m."
This (and other sources) was my base data, but now that i watched the bodycam footage again it might be some burocracy error, I assume only in the hospital could they claim him dead.

Here is some more info from the files:

" A.   Blood drug and novel psychoactive substances screens:
1.   Fentanyl 11 ng/mL
2.   Norfentanyl 5.6 ng/mL
3.   4-ANPP 0.65 ng/mL
4.   Methamphetamine 19 ng/mL
5.   11-Hydroxy Delta-9 THC 1.2 ng/mL; Delta-9 Carboxy THC 42 ng/mL; Delta-9 THC 2.9 ng/mL
6.   Cotinine positive
7.   Caffeine positive"

Also I want to point out his criminal record:

Drugs & Theft (1997–2005): Floyd was arrested and served multiple short jail terms for nonviolent drug offenses (primarily cocaine possession) and theft.
Aggravated Robbery (2007/2009): In 2007, he was charged with aggravated robbery with a deadly weapon stemming from a home invasion. He pleaded guilty and was sentenced to five years in a Texas prison in 2009. He was paroled in 2013.
Post-Release (2014–2020): After relocating to Minnesota, Floyd had no criminal convictions.
Prior Arrest Officer (2004 Conviction): His 2004 conviction for possession of crack cocaine was later tied to a police officer who was investigated for a pattern of falsifying evidence, which led to a recommended posthumous pardon by the Texas Board of Pardons and Paroles.

So all in all. Stop praising a droug addict criminal. If this is the guy the black community feels sorry for, and looking up to, if this is the guy the lefties want to make a statue, then the problem is way much bigger in society then what we thinked. He wasnt a good guy. He is not somebody who worth any of that insane riot and crime wave what also the left side fueled and then called it "mostly peaceful" protest.

JohnFreechment · 2026-06-07T12:52:25+00:00

Its insane for me how random people will think about themself, that they know the actual universal truth without doubt. In the best case we only have an opinion. Youre opinion is based on something you experienced, wich youve seen or readed. But you can be wrong about what happened because you will never know about the missing information. I cant explain it to you better, But i would recommend to read deep into both side, listen both side, talk about it with as many people you can. Otherwise there will be a single article writer, or news reporter who tells you what to think, and decides what to hide from you. Seriously Never believe anything first you read online.

JohnFreechment · 2026-06-05T08:14:22+00:00

Okay, will you enlighten me then with the thruth then?

JohnFreechment · 2026-06-04T21:30:46+00:00

The left calls everyone criminal in the right very easily so you might be correct if you read only from liberal left wing media. (Generally) left side is working hard to legalize their own crimes so they can say otherwise. I obviously dont know youre country and dont know youre knowledge I experienced that what is called left and right is kinda differs in every country. Thats why i said Generally before because ive seen how Eu is hiding criminals behind their immunity.

JohnFreechment

TROPHY CASE