We offer a versatile solution for various applications using special LED light sources.
Contact Image Sensor, CIS, is an image reading sensor using LEDs as the light source with integrated lenses and sensor ICs. The Contact Image Sensor is used in a wide variety of products
. A CIS contact sensor is smaller and lighter than a CCD line sensor. Therefore, optical elements are integrated into a compact module. Thus, helping to simplify the inner structure of the scanner. Particularly, its height of 30mm, makes this ideal for a portable scanner. Comparatively, the CIS is widely used in scanners (especially portable scanners), electrographs, bar code readers, and optical identification technology.
Flatbed scanners use Contact image sensors (CIS). Thus allowing direct contact with the object to be scanned. Additionally, Charge-coupled devices (CCDs) are often used in scanners. Uniquely, CCD use 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. The applications are powered over USB.
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.