Author Topic: Fixed camera lighting upgrade  (Read 4454 times)

Mike

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Re: Fixed camera lighting upgrade
« Reply #15 on: March 05, 2019, 10:43:02 AM »
If you never find you need to tweak vision settings then there's little point.
Dimming the LEDs only gets you so far - the /main point is to increase the light level such that any change in ambient light level is negligible compared to the illuminator. Even if the camera has no adjustments, the camera lens probably does have an aperture adjustment.
If this is already fairly closed you may need to add a filter to reduce the light level into the camera.

PSMike

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Re: Fixed camera lighting upgrade
« Reply #16 on: March 10, 2019, 03:32:01 PM »
The simple method I used was to cut out the old LEDs, drop the wire from the 12V 12 LED ring below through a hole on the aluminium LED support ring and fix the PCB in place on top of the aluminium ring with double sided tape or your preferred fixing method.

Solder the wires to the old supply wires and cable tie to one of the camera supports, keeping things tidy. Finish up by placing a 15mm copper end feed straight coupler on top the the camera lens to stop light getting to the camera, I didn't fix or glue it as it sits nicely.

I also used a black marker pen on the inside edge of the translucent white ring, but don't know if the penmanship made a difference as there's no lens flare. Cost under 3 quid, takes about half an hour.

https://www.ebay.co.uk/itm/2x-White-40mm-12V-1210-3528-9-SMD-LED-Car-Angel-Eyes-Headlight-Halo-Ring-Light/183572284970?hash=item2abdc2c62a:g:IAwAAOSwwnVcdSNT
https://www.ebay.co.uk/itm/Plumbing-End-Feed-Copper-Fitting-Straight-Coupler-8mm-up-to-67mm/192517422892?var=492606537586&hash=item2cd2eebf2c:m:mmMolovfPLzEMZuU-s0WLmw

Cheers
Mike

phonoplug

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Re: Fixed camera lighting upgrade
« Reply #17 on: March 11, 2019, 11:52:35 AM »
Just to add my 2p worth. I recently also replaced the dim and dingy component camera illumination ring. After replacing with that in the pictures below I had to change the setting on the rotary dip switch at the bottom of the camera from 0 to 2, and that brought the threshold adjustment figures for most CDFs down to around 0 where previously most were edging to -35 with the old illumination (or 100+ with the new illumination but the camera still set to 0). The key thing though is that its very insensitive to ambient light now so I no longer have to darken the room when using the machine and hope the sun doesn't shine through the windows!

phonoplug

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Re: Fixed camera lighting upgrade
« Reply #18 on: March 11, 2019, 11:53:21 AM »
ahem apologies for the huge photos!

trev

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Re: Fixed camera lighting upgrade
« Reply #19 on: March 11, 2019, 10:26:50 PM »
My camera definitely has no shutter control so it sounds like I need an external resistor to set the led brightness to a point that does not saturate the lens. Anyone have a recommendation for using an ND filter over an external resistor?

I will make Mike's board up and test it out. I have noticed that over time some components seem to find a placement offset. I locked their x and y position in the cdf file but they still seem to drift. I think this is due to changes in image detection due to light levels. I literally saw placement perfect to start with and then it just moved over time but only for some components.

I will do the fiducial camera lights as well to help with auto correct. That always seems to struggle.

Trev


Mike

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Re: Fixed camera lighting upgrade
« Reply #20 on: March 12, 2019, 10:55:46 AM »
My camera definitely has no shutter control so it sounds like I need an external resistor to set the led brightness to a point that does not saturate the lens. Anyone have a recommendation for using an ND filter over an external resistor?

I will make Mike's board up and test it out. I have noticed that over time some components seem to find a placement offset. I locked their x and y position in the cdf file but they still seem to drift. I think this is due to changes in image detection due to light levels. I literally saw placement perfect to start with and then it just moved over time but only for some components.

I will do the fiducial camera lights as well to help with auto correct. That always seems to struggle.

Trev


The whole point is to increase the light level so that ambient chages are a smaller proportion of the light the camera sees, so although reducing the illuminator to the point where it no longer saturates the camera may give some improvement, the man objective is to reduce the camera's sensitivity to the point where ambient light is insignificant compared to the illuminator.
If the camera doesn't have the shutter time control, first thing would be to stop the lens down as far as it can go, then look at adding an ND filter

alanambrose

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Re: Fixed camera lighting upgrade
« Reply #21 on: March 13, 2019, 11:10:30 PM »
>>> If the camera doesn't have the shutter time control, first thing would be to stop the lens down as far as it can go, then look at adding an ND filter.

On my RV1S, I just replaced the LED ring without changing the camera settings or using an ND filter etc. I leave the interior lights on when it's placing and it seems fine. I think the camera AGC sorts it all out OK.

Alan

trev

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Re: Fixed camera lighting upgrade
« Reply #22 on: March 19, 2019, 09:53:09 AM »
Well I have it working of sorts but did not have a lot of time to fiddle with it. Mike's board is extremely bright!

I have ordered an ND4 filter so will experiement a bit when that comes.

There seems to be a few different board designs now so everyone is going to have different settings which is a shame.

Thanks for all the comments though, the forum certainly is keeping these machines alive.