2021-08-01 (Su) 24EngLaserGrid FAILED

I wanted to try a couple more techniques for using the infrared camera. I thought there was a chance that the light necessary to register was dependant on the ambient light, similar to how a pocket lighter is barely visible on a sunny day. I hoped to filter out the noise so a few dim beacons would count. To test my hypothesis, I ordered 10mW red lasers and bought some red filter material. Since the cameras were designed for infrared, I also bought four different IR filters.

The red lasers were modules, and I had to solder a battery pack to them. I used a pair of AAs so they would have enough power. The bare camera could detect the red lasers from 60-70cm from a wall, but the signal was unreliable. For the system to work well, I would have to detect a reflection at over 300cm reliably. When I added a filter layer, the reliability decreased! Instead of ignoring other light, it attenuated the signal. Additional layers further obfuscated the light. Surprisingly, when I left the camera filterless and shone the laser through the filter to the wall, the fidelity still went down, even though it looked the same to my eyes.

I hoped the infrared tests would go better since I was working in a well-lit room. My filters included 720nm, 760nm, and 850nm. My laser was 850nm, but I started with the lowest filter and worked up. None of them did anything to make the IR laser detectable.

At first, this project seemed like a neat idea and felt doable, but it would cost more time than I am willing to sink right now.
Reading red laser light position

The rest of the posts for this project have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7

Disclaimer for http://24hourengineer.blogspot.com and 24HourEngineer.com

This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information on this blog, or linked by this blog, is not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property, or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by  Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.