We offer a versatile solution for various applications using special LED light sources.
Contact Image Sensors, CIS, is an image reading sensor using LEDs as the light source with integrated lenses and sensor ICs. A wide variety of products use contact image sensors.
A CIS contact sensor is smaller and lighter than a CCD line sensor. Thus, helping to simplify the inner structure of the scanner. Particularly, its height of 30mm, makes this ideal for a portable scanner. Additionally, used in scanners, electrographs, bar code readers, and optical identification technology.
Flatbed scanners use Contact image sensors (CIS). Thus, achieving direct contact with the scanned object. Additionally, scanners use Charge-coupled devices (CCDs). Uniquely, CCD uses mirrors to bounce light to a stationary sensor. Therefore, scanners using CISs are much smaller than ones that use CCDs. Additionally, they use a tenth of the power. Consequently, they are suitable for low-power and portable applications. USB powers the applications.
A CIS typically consists of a linear array of detectors, covered by focusing lenses and flanked by red, green, and blue LEDs for illumination. The use of LEDs allows the CIS to be highly power-efficient, allowing scanners to be powered through the minimal line voltage supplied via a USB connection. CIS devices typically produce lower image quality compared to CCD devices; in particular, the depth of field is greatly limited, which poses a problem for material that is not perfectly flat.