850nm VCSEL

Thankfully to a good friend on the UKNVF has pointed out its a laser and not Led. I have amended the post. He’s also said!NV devices with full HD or 4k sensors are used - e.g PARD, Sytong, Sightmark WraithHD and Wraith 4k, wulf 4K, ATN X Sight 4k
For these NV devices with full HD (1920x1080) or 4k (3840x 2160) pixel sensors, LED based illuminators are simply not bright enough.
This is a search in some ways of trying to find a solution to a night vision unit the Pard 007S.
When fully focused the VCSEL makes a square and the reflector makes a meshing pattern like a fish net.
Would like to be able to improve this.
Maybe a good upgrade. This is where I am stuck at present. To identify this VCSEL laser and find a round one with a great out put.
It maybe chasing a hopeless situation. Or someone here may understand the problem. Been awhile having problems with picture’s and now read I need photo something to post to. Don’t do external bucks. That’s great make a post and can do the visual :person_facepalming:
KH

There's a link in my signature on how to post pics on BLF.

Yes thanks found the information.
Difficult for me.
KH

I also have that combination of Pard 007 and UF-T20. I wind the focus back a little, so the square and led shadow disappear.

But to answer your question, Simon’s Convoy store probably has the best solution with a choice of 3 torches . The C8 will give a tighter IR beam, while the S12 would be floodier, with the S2 in between. Still waiting for my S12 ( nichia 219b ), but I know the C8 and S2 are easily rifle mountable.

The other options come from Kaidomain.com in the form of an IR Manta Ray torch, or a 7 watt drop in with a P60 host.

Good hunting,

Chris

Thanks Chris
I have a vcsel external like your T20, but find this extra hard work.The throught is to get the extra that is square and mesh pattern gone.
I know what you are saying about the adjustment, but with the 223 I am at the shooting at night vision limits and just need the target more eliminated. I have a bunch of C8s but mainly now thermal and nv so not giving away position. The 7 watt sounds impressive but if its not laser then useless with the Pard.
KH

It’s a bit hard for me to understand what you’re trying to accomplish and what limitations you have. Could you explain a little better so we can we to help?

It’s a night vision hunting scope, go watch the video on the website.

https://pard-official-store.com/products/nv007s-add-on-night-vision-scope

IR is not visible to human eyes, so to “see” it you need a sensor and image processing to convert and display it on a screen that you can see. Inside the IR scope is some sort of a prism optic to project the display screen into the line of sight of the rifle scope.

@Kiwi

Could you try covering the front opening of the day scope with a black cap to block any stray light—does it help remove any of the artifacts possibly created from backlighting of the screen image?

Hi Jaredm
What I would like to do is get full use out of this IR on the pard.
Most shooting is to have adjustment just over half way out. But to get full IR for the distance is impossible in its setup. One to identify the vcsel the Pard is using and to see if there is a better option now. This saves the external weight of a IR torch. But if that’s the only option.
Well I’ll take a look at it. If I can make out the target clearly then a good opportunity of hitting it.
I am hopeful for SB to post the pictures.
KH

Filter wasn’t any good just produced more honey cone affect.
KH

Some thoughts on that test,

1. Maybe the sensor display screen is damaged or defective? Can you obtain a clear screen image under any test conditions such as shorter range, brighter IR illumination, viewing an IR source at various distances, etc.

2. On some small lasers i have seen the use of a collimator such as a slotted or cross hatched metal grating to limit beam divergence. i wonder if somehow there is a reflection of a collimator being displayed on the screen?

3. Cover the optical scope with a black cover and cover the laser emitter, and view the screen image in dim and dark conditions—are these artifacts still present and visible?

Do you have an IR flashlight that you could use for testing, that might help rule out some issues.

Some pictures of the IR laser chip from kiwi

cover/aperture

zoom view

this may be the detector lens, kiwi can explain

Thanks kennybobby
KH

Found some VCSELs made by Vixar, Vixar chip dies

and datasheet of the largest (2mm x 2mm) and highest power (6W) VCSEL chip. Maybe an array of 3 or 4 could be used with a larger diameter aperture.
datasheet

what is the diameter of the VCSEL board in the photo above?

Where is the lens located? Is that lens used to focus the output of the IR beam after passing thru the aperture, or on the sensor side to capture the return beam?

On closer inspection i’m not very impressed with the build quality—they left a sloppy mess of flux residue near the power solder joints and the emitter, and the accident-waiting-to-happen with the stripped bare wires nearly touching the edge of the holes drilled thru the aluminum base.

It wouldn’t take much for the + and - wires to touch the base and short out the power supply and blow something.

You wouldn’t want flux residue molecules to land on the emitter surface as it has no protective coating.