Laser output measuring device for laser knife

A laser output measuring device for a laser knife with a flexible manipulator comprising:

• a laser oscillator;
• shutter means provided on the optical axis of a laser oscillator;
• a power detecting means for measuring laser output at an emergence port in an end section of said manipulator for a first position of said shutter means and laser output of said laser oscillator for a second position of said shutter means selectively in response to the switching operation of said shutter device;
• a housing including a measuring hole member for fixedly securing said end section of said manipulator in such a manner that the output laser beam from said end section of said manipulator is applied to said power detecting unit for said first position of said shutter means;
• detecting sensor means for detecting whether said end section of said manipulator is inserted into said measuring hole member, said shutter means being coupled to be operated in accordance with an output of said detecting sensor means;
• arithmetic circuit means operating in response to said power detecting means for measuring the laser output of said laser oscillator and converting said laser output of said laser oscillator to a value representative of a laser output at said end section of said manipulator;
• and
• display means for displaying said laser output at said end section of said manipulator, said display means operating in response to said arithmetic circuit means.