Hello,
I know this is not specifically arduino related, but I am thinking about using a ir temperature sensor on some servos, to create a cheap 256*256 thermal camera. However, most ir sensors do shipp without lenses, so range is very limited. The lenses focus needs to stay the same for a variety of ranges, as an image is none have multiple objects at different distances. Is there anything about these lenses i need to obey, or could i just use lenses for standart visible light treatment as if I was working with visible light.
Thanks for any help, and I hope you don't mind, that this is probably gone end up as a raspberry pi porject.
Visible light lenses do not work for long wave IR detected by most thermal imaging cameras.
Long wave IR lenses are expensive. LightPath® Mid-Wave and Long-Wave Infrared (IR) Aspheric Lenses
Okay, this looks quite expensive...
Is there any other way to configure the field of view, maybe like a set of mirrors or something?
And how are cheap distance temperature sensors optics done?
javamaster10000:
Okay, this looks quite expensive...
Is there any other way to configure the field of view, maybe like a set of mirrors or something?
And how are cheap distance temperature sensors optics done?
A pin hole will limit the field of view and still allow light to enter. Or perhaps a small tube in front of the sensor.
Paul
A pin hole will limit the field of view and still allow light to enter. Or perhaps a small tube in front of the sensor.
Unfortunately, that idea doesn't work for thermal imaging sensors, because the sensor will detect the thermal radiation from (and measure the temperature of) the pinhole assembly or tube.
@javamaster: Try out the Grideye, which is an inexpensive 8x8 thermal imaging sensor. It works pretty well and no lens is needed. Somehow the detection elements are arranged so their fields of view are reasonably restricted and do not overlap much. https://eewiki.net/display/projects/Panasonic+GridEYE+Breakout+Board+and+GUI
jremington:
Unfortunately, that idea doesn't work for thermal imaging sensors, because the sensor will detect the thermal radiation from (and measure the temperature of) the pinhole assembly or tube.
@javamaster: Try out the Grideye, which is an inexpensive 8x8 thermal imaging sensor. It works pretty well and no lens is needed. Somehow the detection elements are arranged so their fields of view are reasonably restricted and do not overlap much. https://eewiki.net/display/projects/Panasonic+GridEYE+Breakout+Board+and+GUI
Actually this is for a scool project, so gridEYE sounds like a good way of doing it, but I would still, if possible like to get a sensor that utilises scanning technology. However, the idea of the tube in front of the sensor isn't bad at all. The only problem is, that the material needs to be IR black, and low to non emissive. After a bit of research, I have found such materials, but as there is no shop having them in stock, or at least listet on their website. Has anyone found a source of such material?