Not all CCTV surveillance cameras are built for the same applications. Whilst dome or bullet cameras are great CCTV camera options for surveillance in the day and in areas with good light conditions, night vision cameras are specially designed for capturing clear images even in pitch-black conditions. To help you choose the best surveillance cameras for the nighttime, here’s everything you need to know about night vision cameras in Singapore:
How do night vision cameras work?
Night vision cameras are also known as infrared (IR) cameras. They pick up the invisible wavelengths of IR light that are present in the environment all the time, even in conditions with little visible light. Using the detected IR rays, these cameras form quality images that are then displayed in black and white.
To enhance the clarity of the images produced, night vision cameras are also designed with a ring of IR light-emitting diodes (LEDs) around the lens that projects additional infrared light onto the surroundings. When the transmitted infrared light reflects off objects, similar to visible light, the night vision camera picks up clearer footage for better surveillance.
Day/night vs. night vision cameras
A downside to infrared technology is that it interferes with the colour quality of images, which is why day/night CCTV cameras are often a desirable alternative for recording coloured images in the day, and also picking up clear images at night.
Day/night cameras, like night vision ones, are equipped with IR technology that enables them to detect images in the dark through ambient IR light. To produce true tone images in well-lit conditions, the day/night cameras use a filter that prevents IR light from entering the lens; whereas under poor lighting, the filter is removed and the camera picks up on surrounding IR rays.
However, day/night CCTV cameras are designed without powerful IR LEDs that night vision cameras have, and thus are ineffective in minimal to no light environments. Hence, it is advisable to use day/night cameras only for areas with changing light conditions like direct sunlight, reflections, glare, and dim lighting. Ultimately, it is still best to use night vision cameras for low-light environments – especially so for businesses like airports, banks, manufacturing factories that require reliable footage in the dark.
Choosing suitable night vision cameras
Before purchasing night vision CCTV cameras, consider whether they have infrared illumination powerful enough to project onto the area that needs to be surveilled. Superior night vision cameras can cover distances of up to 45 metres, or even more.
Also, consider getting dynamic smart IR cameras or LEDs that adjust illumination according to the distance of objects to ensure ideal exposure. This is to prevent objects from appearing completely white when they approach too close to the camera. Otherwise, a large amount of IR LED rays are reflected from the object into the camera lens at a short distance, resulting in an over-exposed and unclear image being captured by the camera.
Altogether, should you require CCTV surveillance on your premises at night or for minimal light environments, night vision cameras are the ideal option. More importantly, you should evaluate the purpose of your CCTV camera. For instance, large areas will require powerful LED illumination, whereas IR is best used to surveil short distances instead.
The best practice? Consult a CCTV surveillance company in Singapore to have them assess the premises and recommend the best night vision cameras to suit your needs.
Need a hand with picking the CCTV cameras for your business premises? One Stop Office Solution (OSOS) is a CCTV surveillance company in Singapore that’s got you covered. Get in touch with us today.