A Day Night Camera, as the name suggests, is a surveillance camera designed to capture high-quality images and videos both during the day and at night. It employs advanced technology to adapt to changing light conditions, ensuring clear footage round the clock.
How Does a Day Night Camera Work?
Day Night Cameras utilize a combination of technologies to deliver optimal performance regardless of lighting conditions. During daylight hours, they employ color imaging sensors to capture vibrant and detailed footage. As light diminishes, the camera seamlessly transitions to infrared (IR) mode, utilizing infrared LEDs to illuminate the scene and capture grayscale images with exceptional clarity.
To create realistic color images, color CCD or CMOS cameras use infrared (IR) cut-off filters. IR filters can efficiently block visible light, allowing only the red portion of the light spectrum to pass through.
Infrared filters can transfer around 700nm to 900nm within certain visible light spectrum’s “near infrared” band, which ranges from 700nm to 2500nm. When employing such filters, you could change a tree’s green foliage to white or darken the sky above, just like you would if you were using an old film, to create unique photographs.This can be accomplished using either absorption or reflection optical techniques. A unique type of optical glass is used to create absorption filters because it can absorb near-infrared light. Infrared light is efficiently reflected using reflection-type filters, which are short-pass interference filters. Typically, CMOS cameras employ reflecting IR filters, while CCD cameras utilize adsorbing filters.
