Camera concepts! Need help

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ekman61

Member
Mar 9, 2016
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Sörmland
Hello everyone
Im working on a camera and I need your help. Im using a Raspberry Pi3 with the original camera (1080p 30fps) and a fixed focal lens. The benefits of using a fixed focal lens is that when you have set the focus on the crosshairs it wont change. Ive made three concept, one for scopes, one for red dot sights and one for laser sights (day laser and/or IR-laser). I have made some prototypes and are working on the final design but i have never used a scope camera and need your input, what problems do you see with the design?, how would you do it different?, is there a feature Ive missed, etc.


1523182281_10180296775ac9eac9aa0a45.02373133_Image 3.png

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Concept one - Scope camera
1523181614_7208396735ac9e82e7eeae1.14811166_Image 1.png

1523181679_11834781065ac9e86fa4d230.97716936_Image 2.png

1523181859_7916538235ac9e92351eb49.57161891_12mm M12 Scope.png

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Concept two - Red Dot sight
1523181982_14529614155ac9e99e09bb02.26387946_Image 2.png

1523181993_11468382775ac9e9a9b6df28.51647469_Image 1.png

1523181943_13544937375ac9e97785d865.91392763_12mm M12 Red Dot sight.png

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Concept three - Laser sight
1523182107_17414778585ac9ea1bacc664.18834332_Image 5.png

1523182120_10786606605ac9ea2826e5d5.90902126_Image 4.png

1523182189_445821005ac9ea6d1f86c3.31413650_12mm M12 Laser sight.png

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New tests this weekend!
I got my IR-flashlight, its a 940Nm flashlight but the 850Nm is 35% stronger then the 940Nm.
I also got a green light flashlight.


When I test the scope camera outside in daylight, I get really good image but when I test it in the dark with IR-flashlight I get a terrible image.
Its way to dark to see anything. 
This might be because my test area (my balcony) might not be dark enough for testing. 
The flashlight might not be strong enough to light the target. 


Indoors I get better result. 
The IR-flashlight lights up the target, but when I go from daylight to night vision the reticle is no longer in focus anymore. 
1525643262_12747305245aef77fecda605.97135350_22-43-47.jpg



Here is the same setup but with visible green light. 
1525643577_20257141695aef79393586f2.34572091_22-45-21.jpg



Same thing with the red dot sight. The image gets really grainy in night vision. 


Here is my prototype and some test images. 
1525642270_4966845345aef741ec45544.93403947_Scope Prototype.JPG


1525642237_9403759875aef73fdabd995.10744463_12mm M12 Red Dot sight IR.jpg


1525642221_21219506295aef73ed4eab11.97487264_12mm M12 Red Dot Sight Green Light.jpg


1525641607_10764956095aef718703ab62.19970073_8mm M12 Scope Daylight.jpg
 
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I managed to brake my 8mm lens and had to order new ones.
While I wait for the lenses to arrive, I tested an RMR and a Micro H-2 type red dot sight today.
No pictures of the Micro H-2 because the lens was 6mm and was not good enough, I need the 8mm.
In the last picture the RMR is farther from the lens and you can se the top of the RMR.
The RMR is riding low thou, it needs to be higher.

1526159859_1932685875af759f32e0238.23609146_22-18-27.jpg


1526159859_2663026215af759f37b4099.35627133_22-21-11.jpg


1526159874_13878977385af75a02487cd8.60012858_21-41-51.jpg

 
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Upvote 0
@ekman61

'Indoors I get better result. 
The IR-flashlight lights up the target, but when I go from daylight to night vision the reticle is no longer in focus anymore. '

Infra red and visible light focus at different focal lengths. If you have an old SLR camera you can see the IR focus index on the lens.

That said, I don't have a solution for you... sorry





Paul
 
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Over the last couple of weeks Ive been testing different cameras and finalising the design. 



I will be using an infrared USB board camera and a IR-CUT filter hat.

In night mode I will take off the IR-CUT filter, and in day mode I will put it on. 

I will be using the focus ring on the scope to fix the problem with different focal length of infrared and visible light.
1532097629_13219292015b51f45d7cee03.93554920_Board camera.jpg




And I think Im very close.

Here are som pictures.
1532097717_2008796735b51f4b57ffb98.70389615_Image 1.png


1532097728_899940435b51f4c0862351.50666702_Image 3.png


1532097737_13422319625b51f4c951c865.38882496_Image 2.png


1532097746_19572033645b51f4d2542a26.45369364_Image 4.png


I think the next step will be the software.

// Daniel
 
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The prototype arrived. The DVR is to small. 

Here are some picture.

1533449551_15210481535b66954fb61ad6.45361860_Foto 2018-08-04 16 38 44.jpg


The bad image is because the screen and the camera are broken. But they will work for the prototype. 

1533449652_9373097835b6695b4e8baf3.85899301_Foto 2018-08-04 14 28 49.jpg


The line across the screen is the screen and the black dots are the camera. 

Oh yes the company who makes the screen have upgrade it to a 4" screen and stoped selling the 3,5" screen. 

So I had to redesign the DVR.

1533450743_18528831055b6699f7142296.78108700_Image 1-2018-08-05.png




// Daniel
 
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