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Man says Laser from self driving car nuked his Sony a7R II

Jan 13, 2019 by Udi Tirosh 2 Comments

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We know show lasers are dangerous to cameras. Heck, we all remember that RED sensor getting fried from a direct laser hit in a light show. With self-driving cards anticipated to rule the roads, the world may become a totally unsafe place for cameras.

Ars Technica reports that During CES  Jit Ray Chowdhury, an autonomous vehicle engineer at the startup Ridecell, took some photos of a car equipped with lidars made by AEye. He used a $1,998.00  Sony a7R II. Later, Mr. Chowdhury noticed that all the photos he took after taking that car photos had a couple of bright purple spots on them. Each spot being the center of a cross-like purple pattern.

He told Ars Technica that

All my pictures were having that spot, I covered up the camera with the lens cap and the spots are there—it’s burned into the sensor

Here are the shots that Mr. Chowdhury took with the lidar units on top.

and here is a closeup of those same photos showing the marks.

And here is the photo that was taken with the lens cap off, showing sensor damage

Lastly, here are some of the photos taken showing that same bright purple cross pattern in various exposure conditions

AEye CEO, Luis Dussan, told Ars Technica that “Cameras are up to 1000x more sensitive to lasers than eyeballs,” Dussan wrote. “Occasionally, this can cause thermal damage to a camera’s focal plane array.” He did not confirm or deny that the lidars can cause damage to camera sensors.

Chowdhury says that AEye has offered to buy him a new camera.

What is Lidar, and is it dangerous to cameras?

Lidar is a crucial component in the autonomous cars industry. It is a Sonar-like device, only it uses light instead of sound to measure the proximity of objects. While lidar is often referred to as a sensor, it is actually an active component and does more than just “sense”. A lidar sensor sends light into the air and measures how long it takes to come back.

Self-driving cars relay on lidars, but they also rely on “conventional” cameras. If Lidar is indeed capable of damaging cameras, this is bad news to the entire autonomous cars industry. Statistically, since some areas are filled with (semi)autonomous cars and photographers alike and this is the first that we’ve heard about such incident, I would like to speculate that not all lidars will harm a camera.

Dussan also told Ars Technica that AEye is “fully committed to implementing mitigation technology” and described camera safety as “a complex issue that the entire LiDAR and laser community will need to address.” Which to me reads that even if not common, the issue of protecting cameras from lidars is known. As I mentioned before, the stats show that this is not a common problem.

Mr Chowdhury tells DIYP that: the ones [lidars] already in streets on self-driving cars are not doing this, and I know quite certainly as I have photographed almost all of them while in operation, and that too very closely. That said all LIDAR manufactures should do they own test and disclose how camera safe they are, and what we can do to keep cameras safe. Unfortunately, we discovered it with one particular companies LIDAR, but they might not be the only LIDAR capable of doing this to a camera, as I know a few other companies using similar tech that might cause this problem.

Just as a reminder. While Lidars are not as powerful as lasers, here are a few short videos demonstrating how a party laser projector can kill CMOS sensor.

[via Ars Technica, illustration based on Wikimedia Common]

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Filed Under: news Tagged With: camera sensor, CES 2019, Laser, Lidar

Udi Tirosh: from diyphotography.net

About Udi Tirosh

Udi Tirosh is an entrepreneur, photography inventor, journalist, educator, and writer based in Israel. With over 25 years of experience in the photo-video industry, Udi has built and sold several photography-related brands. Udi has a double degree in mass media communications and computer science.

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Udi Tirosh: from diyphotography.netUdi Tirosh is an entrepreneur, photography inventor, journalist, educator, and writer based in Israel. With over 25 years of experience in the photo-video industry, Udi has built and sold several photography-related brands. Udi has a double degree in mass media communications and computer science.

Alex Baker: from diyphotography.netAlex Baker is a portrait and lifestyle driven photographer based in Valencia, Spain. She works on a range of projects from commercial to fine art and has had work featured in publications such as The Daily Mail, Conde Nast Traveller and El Mundo, and has exhibited work across Europe

David Williams: from diyphotography.netDave Williams is an accomplished travel photographer, writer, and best-selling author from the UK. He is also a photography educator and published Aurora expert. Dave has traveled extensively in recent years, capturing stunning images from around the world in a modified van. His work has been featured in various publications and he has worked with notable brands such as Skoda, EE, Boeing, Huawei, Microsoft, BMW, Conde Nast, Electronic Arts, Discovery, BBC, The Guardian, ESPN, NBC, and many others.

John Aldred: from diyphotography.netJohn Aldred is a photographer with over 20 years of experience in the portrait and commercial worlds. He is based in Scotland and has been an early adopter - and occasional beta tester - of almost every digital imaging technology in that time. As well as his creative visual work, John uses 3D printing, electronics and programming to create his own photography and filmmaking tools and consults for a number of brands across the industry.

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