Oh cool I want to see this to. I want to see the difference between the m20 vs the m25 myself.
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Oh cool I want to see this to. I want to see the difference between the m20 vs the m25 myself.
you said itOriginally Posted by MEM-TEK
Hi happya$$,
I agree with you. I'm betting on the difference or lack thereof of good IR filtering between the different cameras. To me, it is obvious that the top two screen captures were done with cameras which either had no IR filtering or which had relatively weak IR filtering. The bottom screen capture seems to show a strong reddish tinge which should be due to the camera's built-in and fairly strong IR filter, the roll-off of which starts in the deep red.
Thats my conclusion based on optics and filter design, and knowing that the IR LED emitters actually have a very narrow bandwidth. Needless to say, the camera lens itself could either employ coatings or types of optical glass which may either block IR or produce a steep roll-off towards the IR part of the spectrum. The only way such videos would be worth a grain of salt is if all were shot using the same camera and lens.
--Michael
wooooo let me back up not trying to get any one sued in here
Sorry i have been sleeping
A led light emission is more angled where as a laser diode more directional.
The camera set up at 20 meter for one that is pretty close (60 feet) the head is practically on the ground. Also the camera is at 5 feet high heads are 1.5 feet off of the ground its a pretty good amount of an angle. Also remember the concave design on the Blinder head will disperse light more up and down areas where the LPP is just flat.
IR led takes little amperage laser diode takes quite a bit.
This was shot with a Sony handy cam in night vision mode with no filter anyone can do this one.
Here is a vid I took a few weeks back showing the LPP is brighter tan the M-25
It is shot at 90 feet and less of an angle stares right at it.
Sorry if the video is a little misleading on the brightness.
But keep in mind in a real life scenario especially a bridge shot there is a big angle!!!
Also to throw the brightness test completely out the window, we have no idea if one is tuned to the better nm frequency whether the Blinder or LPP haves a broader light spectrum or a more precise tighter emission of light, meaning the camera likes the 600 to 850 nm range better than 800 to 950 range does this make sense?? For instance if the camera liked the 700nm range the Blinder emits 650 to 850 nm it will show up brighter than if for say a LPP emits 850 to 950 ranges. It will look dimmer to a CCD inside the Sony cam because its not tuned to that specific frequency and will be brighter to the LIDAR gun that is tuned to 904 nm.
Ok bear with me if you watch this movie it’s the second in the list the LPP has a yellowish tent to show the possibility of my assumption here
Watch the second video it will show this
http://www.cooleysllc.com/vidy.html
which also i might ad my firm belief that PTs are a detection issue not a output issue. if a old m100 had sensors all over the car i bet it would JTG a school bus :wink: cough cough
phew.............. lot of testing for not driving.
well, a lot of interesting results, with some surprises, and such.
i have a lot of video to go over, so here's a rough breakdown for everyone.
Of course the LE-10 is the beast of all, no comparison there.
i did so many combo's i'll share the highlights for now.
Alone, all the heads were fairly equal, but you can tell the beam pattern on the diode ones were more "spotlight" while the LED's were more "floodlight"
a few interesting observations:
the LE-30 didn't play well next to a Blinder. it had an erratic firing pattern.
it did fine alone, or even with an AL.
The Blinders fire much better alone, than with each other, meaning the Blinder heads were more "solid" alone, but when firing with another Blinder head, or even another jammer, they would tend to "pulsate more" for lack of a better term.
you'll see what i mean in the video.
as for the 20 vs 25 debate, judge for yourself, but through the lens they seemed too close to call.
somewhere before i discussed head placement with Blinders, and putting the receivers to the outside, so i did a test of that and you can judge the results for yourself. pay attention to placement
also something kinda strange occurred. when i had the M25 head next to the AL, when both fired, the M25 was easily as bright, if not brighter, then after a few seconds, it dimmed quite a bit.
i tried this with the 25 head and the 20 head, spaced about 24" apart on center, and was able to reproduce it on film as well. both started off very bright, then dimmed a bit. not sure why.
don't expect vids tonight, but i'll work on getting them downloaded and edited.
Hey man thanks for doing it. I know it's a lot of work to do the video but I look forward to seeing it. Thanks for taking the time.
I see one problem, maybe a couple.
The video cam may have set the exposure automatically. If so, there is always the problem of the sensor being blinded or a little off axis so the movie can be either overexposed or underexposed. You didn't say if the exposure was locked in manual mode.
I also agree that depending on the light source, the reflector will influence the brightness as well. Shooting off to the side will tell along with a straight on.
Bingo, you need to include the EXIF data to know shutter speed, ISO, and aperature of the camera or your not comparing anything.
A camera likes to make everything medium gray as far as brightness.
That is why most that are inexperienced with their cameras have winter photos where the snow does not appear to be white.
Also, you would need to take multiple photos at various angles to see if there is a hot spot in the light. You realize that what the laser LEDs are designed to do is capture the response of the gun so that it does not see the beam it sent but instead the one you send out.
Laser jammers are so freakin basic I can't believe they charge what they do for them. I think I'm going to build my own.
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Like I said before I don’t think there is a true brightness test I tried it and got mixed results. However having the ability to see IR will show if the jammer is working or not.
One huge observation that people need to be reminded of!!!!
Blinder M20 tested on the Dodge Charger.
The Testing was unoffical cause certified police officers wont operating the gun.
The Blinder M20 gave an instant punchthrough at 1950feet with the stalker LZ1. I got that punchthrough honestly. Can we believe videos that have commerical links posted on them? NO!!!
So, if I take off the commercial links it makes it real. I could just post a video and say it was a test and take off the commercial part of it and it would be the same thing. I just turned what I shot into a commercial.
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