초록 ▼

An optical detection device particularly suitable for use in a bank note counting apparatus is provided. By the use of the optical detection device of this invention, the influence of dust or change in power of the light emitting element due to change in temperature or other factors is excluded to m

An optical detection device particularly suitable for use in a bank note counting apparatus is provided. By the use of the optical detection device of this invention, the influence of dust or change in power of the light emitting element due to change in temperature or other factors is excluded to maintain the quantity of light received by the light receiving element at a constant level. The control circuit incorporated in the device of this invention includes a comparator for comparing the quantity of light actually received or sensed by the light receiving element with the pre-set value to generate an output signal instructing to stepwisely lower the power of the light emitting element. In actual operation, the power of the light emitting element is firstly raised to the maximum value and then stepwisely lowered to the same value as that pre-set by the operator. The control circuit further includes a control for controlling the power of the light emitting element to an optimum level in response to the output signal generated from the comparator. The device of this invention may have an alarm signal generator and an alarm signal display device for indicating the occurrence of jamming of any bank note.

대표청구항 ▼

An optical detection device for use in a bank note counting apparatus that performs a counting operation, said device comprising a light emitting circuit for emitting a quantity of light, a light receiving circuit for receiving the light emitted from said light emitting circuit, a comparator for com

An optical detection device for use in a bank note counting apparatus that performs a counting operation, said device comprising a light emitting circuit for emitting a quantity of light, a light receiving circuit for receiving the light emitted from said light emitting circuit, a comparator for comparing the intensity of light received by said light receiving means with a pre-set level to generate an output signal instructing stepwise lowering of the power of said light emitting circuit, and a control circuit for stopping the lowering of the power of said light emitting circuit when said light intensity reaches said pre-set level.