Dual wavelength spectrophotometer for ampoule leak detection and content inspection

A double wavelength spectrophotometer for use in connection with container content inspection and in particular container leak detection, comprising in combination:

• (a) a source of radiant energy;
• (b) first means arranged to receive radiant energy from said source which has passed through the container and its contents for generating simultaneously a plurality of substantially identical optical signals constituting optical signatures of the container and its contents;
• (c) a plurality of predeterminably selected unique radiant energy filter means arranged to each receive a said optical signal from said first means;
• (d) a plurality of photodetector means arranged with said filter means, for providing a plurality of respective output electrical signals representative of the radiant energy received from said filter means;
• and
• (e) second means for determining the sum between at least a selected first pair of said respective output electrical signals and comparing said sum with a pre-established first threshold value, wherein an output signal is effected from said second means in the event said sum fails to exceed said threshold.

A dual wavelength spectrophotometer for use in connection with container content inspection and in particular container leak detection, comprising in combination:

• (a) a source of radiant energy;
• (b) first means arranged to receive radiant energy from said source which has passed through the container and its contents for generating simultaneously a plurality of substantially identical optical signals constituting optical signatures of the container and its contents;
• (c) a plurality of predeterminably selected unique radiant energy filter means arranged to each receive a said optical signal from said first means;
• (d) a plurality of photodetector means arranged with said filter means for providing a plurality of respective output electrical signals representative of the radiant energy received from said filter means;
• and
• (e) a pair of second means for determining the difference between at least a selected first pair of said respective output electrical signals and comparing said difference with a pre-established first threshold value, one of said second means being arranged to detect the presence of a preselected impurity substance within the container's contents and the other of said second means being arranged to determine the correctness of color of the container's contents even in the absence of said impurity substance.