FREQUENTLY ASKED QUESTIONS - I
Image Sensor
Image Sensor indicates the type of semiconductor which handles video processing inside of a camera. Older CCTV cameras used tubes to process light information. CMOS and CCD image sensors are the most widely available for security cameras in today's market. CCD cameras provide by far the highest quality video of any type of image sensor.
IR Infra Red Light
IR Infra Red Light is a frequency of light which is lower than the human eye's visible spectrum (in the range of 850 ~ 950 nanometers). Color cameras can't use infrared light. However, this special band of light can be detected by most any monochrome CCD camera. Therefore, a black and white video camera in combination with infra red lighting can see in pitch dark conditions where the human eye is unable to distinguish anything. An infra red light source appears just the same as any visible light source on a black and white camera image. Infra red lighting for monochrome cameras should in no way be confused with new FLIR (forward-looking infra red) spotting scopes or cameras which produce a grainy, green-tinted picture and do not require additional infra red lighting sources.
IR Illumination Range
IR Infra Red Light is a frequency of light which is lower than the human eye's visible spectrum (in the range of 850 ~ 950 nanometers). Color cameras can't use infrared light. However, this special band of light can be detected by most any monochrome CCD camera. Therefore, a black and white video camera in combination with infra red lighting can see in pitch dark conditions where the human eye is unable to distinguish anything. An infra red light source appears just the same as any visible light source on a black and white camera image. Infra red lighting for monochrome cameras should in no way be confused with new FLIR (forward-looking infra red) spotting scopes or cameras which produce a grainy, green-tinted picture and do not require additional infra red lighting sources.
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