M5 camera spectral response
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- Mystified1
- Posts: 4
- Joined: Thu Jun 10, 2021 6:00 pm
M5 camera spectral response
I am interested in using the M5 camera in a night version application do you have the spectral response data available? I want to match the IR emitter to the camera’s sweet spot. Thanks
- mikeysklar
- Posts: 13936
- Joined: Mon Aug 01, 2016 8:10 pm
Re: M5 camera spectral response
I was not able to find Spectral Response data. This might help you find more though. The M5 cameras are based on the OmniVision OV7740 Camera Sensor which claims best in class low light sensitivity. Link and datasheet below.
http://www.dragonwake.com/download/came ... 40_CSP.pdf
https://www.ovt.com/sensors/OV7740Using OmniVision's proprietary OmniPixel®3-HS technology, the 1/5-inch OV7740 boasts a best-in-class low light sensitivity of 6.0 V/lux-sec, making it ideal for integrated notebook cameras, as well as stand-alone PC webcams, security and gaming applications
http://www.dragonwake.com/download/came ... 40_CSP.pdf
- Mystified1
- Posts: 4
- Joined: Thu Jun 10, 2021 6:00 pm
Re: M5 camera spectral response
And the answer is….. not what I was looking for but an IR cut filter is in the lens. 650nm.
- mikeysklar
- Posts: 13936
- Joined: Mon Aug 01, 2016 8:10 pm
Re: M5 camera spectral response
@Mystified1,
Just checking to make sure I understand what you are looking for.
If the IR Cut Filter is at 650nm that means stops filtering IR at levels above that wavelength, correct? You were looking for the sweet spot to match an IR emitter so is it the case that you would need to use wavelength longer than 650nm to interact well with the camera?
Did you find the 650nm IR cut filter number based on this chart in the datasheet or through another source?
Just checking to make sure I understand what you are looking for.
If the IR Cut Filter is at 650nm that means stops filtering IR at levels above that wavelength, correct? You were looking for the sweet spot to match an IR emitter so is it the case that you would need to use wavelength longer than 650nm to interact well with the camera?
Did you find the 650nm IR cut filter number based on this chart in the datasheet or through another source?
- Mystified1
- Posts: 4
- Joined: Thu Jun 10, 2021 6:00 pm
Re: M5 camera spectral response
You are correct. The plan is to add IR LEDs to an existing night vision cam. My concern was the camera had a non-removable IR cut filter. (Most do) I was interested in finding the camera’s “sweet spot” to match with the IR LEDs.
Please be positive and constructive with your questions and comments.