Abstract:
PROBLEM TO BE SOLVED: To provide a device and method which increases the operating range, in order to improve the performance of an electro-optical system and/or changes a beam cross section. SOLUTION: Voltage is impressed to a variable lens, in order to change a shape of liquid of the variable lens so that the operating range in an electro-optical reading apparatus or imaging device for reading inscription can be enlarged. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
Working range is increased in an opto-electrical reader for reading indicia by applying a voltage to a variable lens to change the shape of a liquid 42 therein.