Kiwi Airgunners Homepage
Forum Home Forum Home > Technical > Pauly's Technical Area
  New Posts New Posts RSS Feed - Night vision
  FAQ FAQ  Forum Search   Register Register  Login Login

Night vision
 Post Reply Post Reply Page  <123>
Author
Message Reverse Sort Order
  Topic Search Topic Search  Topic Options Topic Options
kruzaroad View Drop Down
Senior Member
Senior Member
Avatar

Joined: 03 Jul 2022
Location: Hastings 4 now
Status: Online
Posts: 2692 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 6:42am
Cheers. Makes sence to me.
Back to Top
Pauly5 View Drop Down
Forum Moderator
Forum Moderator
Avatar

Joined: 11 Mar 2013
Location: Titahi Bay
Status: Offline
Posts: 1676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 6:40am
To answer this. Cameras, like our phones, security all have an IR filter to block IR, as during the day there is too much Infrared light and it would "blow out" the image. So for cameras that are used for night vision, the filter has to be removed. 

If you have ever held a security camera then turned the lights out, you will most likely hear a click. This is the filter being swivelled away.

Kruz, you will experience this when you switch the Sytong between night and day vision.

So for making a DIY unit, it is easier just to remove the IR filter off the front of the sensor. This will make the image "blown out" during the day, but of course you don't need night vision during the day.

Nunga, I have a few sensors and bits and pieces you can have to play around with. Lets trade brass for nightvision stuff.
Back to Top
kruzaroad View Drop Down
Senior Member
Senior Member
Avatar

Joined: 03 Jul 2022
Location: Hastings 4 now
Status: Online
Posts: 2692 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 6:32am
Sounds logical.
Pauly seems to be knowledgeable than me
Try that.
Still
If there is no visable light you can't see at night at all. I. E nothing pitch black.
Night photography on a smart ph requires time, because it pics up the visable light, but it's weak so needs more time for the image.
Exposing the lens may increase the amount visable light that gets to the lens cause wash out. That's my understanding.
Back to Top
Pauly5 View Drop Down
Forum Moderator
Forum Moderator
Avatar

Joined: 11 Mar 2013
Location: Titahi Bay
Status: Offline
Posts: 1676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 6:09am
Originally posted by nunga nunga wrote:

Originally posted by Pauly5 Pauly5 wrote:

Putting a sensor with lens directly behind the scope and using a reversing camera gets great results. I compared my old setup with my DNT Zulus, and as long as your sensor is good and lined up well, it'll work well.


What are these sensors you keep referring to? a sensor with lens? how does this work?

Sensor is the small circuit board with the small square bit that the lens focuses the image onto.



You can see the sliver of glass/IR filter over the top. This can be taken off.
Back to Top
nunga View Drop Down
Admin
Admin
Avatar

Joined: 09 Mar 2013
Location: Pukekohe
Status: Offline
Posts: 1083 		Post Options Post Options   Thanks (0) Thanks(0)   Quote nunga Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 6:07am
yes i know all of this. But this is for "daytime" shooting with IR. at night there is not visible light because it is dark. So putting a filter over the lenses to filter out all the light which isn't there anyway because it is dark does not make any sense to me?

Or am i missing something?
2nd place HP springer - WFTF World Championships 2014
Back to Top
kruzaroad View Drop Down
Senior Member
Senior Member
Avatar

Joined: 03 Jul 2022
Location: Hastings 4 now
Status: Online
Posts: 2692 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 5:57am
720nm but double check that. Camera shops will have the lenses in genral
Back to Top
kruzaroad View Drop Down
Senior Member
Senior Member
Avatar

Joined: 03 Jul 2022
Location: Hastings 4 now
Status: Online
Posts: 2692 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 5:48am
Phones can pick up ir.
Ir lenses filter out most visable light so the camera sensor ( the part in the camera/ph that the lens focus light onto, that is light sensitive and converts light into electrical data, previously the job of film with one pixel doing not quite as well the job of a grain on film)
Isn't overwhelmed with light that overpowers the ir light.
You should probly look up smart ph camera apps too. Some are designed with ir light programs incorporated.

Back to Top
nunga View Drop Down
Admin
Admin
Avatar

Joined: 09 Mar 2013
Location: Pukekohe
Status: Offline
Posts: 1083 		Post Options Post Options   Thanks (0) Thanks(0)   Quote nunga Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 5:22am
Originally posted by Pauly5 Pauly5 wrote:

Putting a sensor with lens directly behind the scope and using a reversing camera gets great results. I compared my old setup with my DNT Zulus, and as long as your sensor is good and lined up well, it'll work well.


What are these sensors you keep referring to? a sensor with lens? how does this work?
2nd place HP springer - WFTF World Championships 2014
Back to Top
kruzaroad View Drop Down
Senior Member
Senior Member
Avatar

Joined: 03 Jul 2022
Location: Hastings 4 now
Status: Online
Posts: 2692 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 4:24am
Ir clip on lenses for smart phones, designed to filter out visable light so as it doesn't over ride the senors for ir light are cheap as chips
Back to Top
Pauly5 View Drop Down
Forum Moderator
Forum Moderator
Avatar

Joined: 11 Mar 2013
Location: Titahi Bay
Status: Offline
Posts: 1676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 4:05am
Putting a sensor with lens directly behind the scope and using a reversing camera gets great results. I compared my old setup with my DNT Zulus, and as long as your sensor is good and lined up well, it'll work well.
Back to Top
nunga View Drop Down
Admin
Admin
Avatar

Joined: 09 Mar 2013
Location: Pukekohe
Status: Offline
Posts: 1083 		Post Options Post Options   Thanks (0) Thanks(0)   Quote nunga Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 3:23am
Yeah from my research i have been doing over the last few hours has come up with pretty much the same thing. I have seen people putting old floppy disk drive film over the camera to block out the light and only let in the infrared rays..but these people use it in the direct sunlight so i doubt it would work at night with my infrared spotlight
2nd place HP springer - WFTF World Championships 2014
Back to Top
jwabfrog View Drop Down
Senior Member
Senior Member
Avatar

Joined: 13 Nov 2021
Location: Thames
Status: Offline
Posts: 159 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jwabfrog Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 3:13am
Hi Nunga, you get a black and white image with Pard and Arken Zulus. The sensors on these are recognizing IR wavelength light (outside of visbile light spectrum). Your phone and GoPro sensors are detecting visible wavelength (i.e. replicating what a human eye sees). They may not be able to detect / record IR light.

https://paulillsley.com/GoPro_Infrared/
"GoPro cameras have a filter installed inside the camera to block infrared wavelengths from reaching the sensor, but often these internal filters aren't 100% effective and do let a small amount of infrared information through."

Googling the same for a smartphone camera indicates most also have IR filters - but perhaps not on both the front and back cameras.

Cheers
Back to Top
Pauly5 View Drop Down
Forum Moderator
Forum Moderator
Avatar

Joined: 11 Mar 2013
Location: Titahi Bay
Status: Offline
Posts: 1676 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2024 at 1:22am
You might find it has an IR filter.

When I had used sensor boards to make my NV I always had to remove the IR filter which is usually a slightly tinted looking piece of glass over the sensor. This makes it very sensitive to IR. 

So unfortunately I don't think phones work well for NV setups due to this filter.
Back to Top
kruzaroad View Drop Down
Senior Member
Senior Member
Avatar

Joined: 03 Jul 2022
Location: Hastings 4 now
Status: Online
Posts: 2692 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 06 Sep 2024 at 2:47pm
Found this on web

That's right! Your regular DSLR could very well be an infrared photography DSLR. If your digital camera is sensitive to infrared light, then all you need is an infrared filter (just as with black and white infrared film) and you're good to go.
Back to Top
kruzaroad View Drop Down
Senior Member
Senior Member
Avatar

Joined: 03 Jul 2022
Location: Hastings 4 now
Status: Online
Posts: 2692 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 06 Sep 2024 at 2:43pm
The night vision scope I have has a memory card slot for footage.
I've never used it bit I'm assuming it's taking its information from the screen display data stream.
Back to Top
 Post Reply Post Reply Page  <123>
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 10.14
Copyright ©2001-2012 Web Wiz Ltd.

This page was generated in 0.017 seconds.