Method and means for measuring high temperatures

Claim 1

A PYROMETER ADAPTED TO MEASURE THE TEMPERATURE OF A SAMPLE HEATED BY A SOURCE OF RADIANT FLUX WHICH IS DIRECTED ONTO SAID SAMPLE BY AN OPTICAL PATH PROVIDING AN INTERMEDIATE IMAGE OF SAID SAMPLE AND AN INTERMEDIATE IMAGE OF SAID SOURCE, COMPRISING IN COMBINATION: (A) RADIANT ENERGY DETECTING MEANS; (B) SAMPLE VIEWING MEANS ADAPTED TO PERIODICALLY VIEW SAID IMAGE OF SAID SAMPLE AND TO TRANSMIT RADIANT ENERGY THEREFROM TO SAID RADIANT ENERGY DETECTING MEANS; (C) SOURCE VIEWING MEANS ADAPTED TO PERIODICALLY VIEW SAID SOURCE OF RADIANT FLUX AND TRANSMIT RADIANT ENERGY THEREFROM TO SAID RADIANT ENERGY DETECTING MEANS; (D) CHOPPER MEANS LOCATED BETWEEN SAID SOURCE OF RADIANT FLUX AND SAID SAMPLE VIEWING MEANS AND ADAPTED TO PERIODICALLY CUT OFF SAID RADIANT FLUX FROM SAID SAMPLE; AND (E) DRIVING MEANS ASSOCIATED WITH AND COORDINATING THE OPERATION OF SAID SAMPLE VIEWING MEANS, SAID SOURCE VIEWING MEANS AND SAID CHOPPER MEANS, SAID DRIVING MEANS BEING ADAPTED TO MOVE SAID SOURCE VIEWING MEANS AND SAID SAMPLE VIEWING MEANS ALTERNATELY AND SUCCESSIVELY INTO POSITIONS TO VIEW SEPARATELY SAID SOURCE AND SAID SAMPLE IMAGE, RESPECTIVELY, AND TO MOVE SAID CHOPPER MEANS INTO POSITIONS TO ALTERNATELY BLOCK AND UNBLOCK THE FLOW OF SAID RADIANT FLUX FROM SAID SOURCE TO SAID SAMPLE WHEN SAID SAMPLE VIEWING MEANS IS IN SUCCESSIVE VIEWING POSITIONS, WHEREBY SAID SAMPLE VIEWING MEANS ALTERNATELY TRANSMITS RADIANT ENERGY EMITTED BY SAID SAMPLE AND RADIANT ENERGY REFLECTED PLUS RADIANT ENERGY EMITTED BY SAID SAMPLE, TO SAID RADIANT ENERGY DETECTING MEANS.