Optische Einrichtungen für Kamera

An optical object scanning system having an optical scanning device (50, 154) for providing a scan output signal including a scan output information portion representative of a scanned region of said object, comprises white reference means (154, 402) for providing a white reference signal; and adjusting means (360, 400) for adjusting the information amplitude of said scan output information portion in accordance with said white reference signal. An optical scanning method in a system including an optical scanning device (50, 154) having scan cycles with an optical scanning rate for providing a scan output signal including a scan output information component having a varying information amplitude representative of the light received by said optical scanning device, comprises the steps of providing a varying white reference signal representative of said received light, and adjusting said information amplitude of said scan output information component in accordance with said white reference signal.