Spectroscope with differential amplifier exposure control

Claim 1

SPECTROSCOPIC APPARATUS COMPRISING AN ELECTRICALLY ENERGIZED SOURCE FOR EXCITING A SPECIMEN TO EMIT RADIATION, MEANS PROVIDING AN ENTRANCE SLIT FOR TRANSMITTING SAID RADIATION FROM SAID SOURCE, A CURVED GRATING FOR DIFFRACTING SAID RADIATION FROM SAID ENTRANCE SLIT INTO A SPECTRUM, MEANS PROVIDING A PLURALITY OF EXIT SLITS FOR RESPECTIVELY TRANSMITTING SELECTED COMPONENTS OF SAID SPECTRUM, A PLURALITY OF PHOTOCELLS FOR RESPECTIVELY TRANSDUCING SAID SELECTED COMPONENTS TO ANALOGOUS ELECTRICAL SIGNALS, A PLURALITY OF CAPACITORS FOR RESPECTIVELY CHARGING IN RESPONSE TO SAID ELECTRICAL SIGNAL, A FIRST OPERATIONAL AMPLIFIER CHARACTERIZED BY THE FORMULA G=ZF/ZI, WHERE G IS GAIN, ZI IS INPUT IMPEDANCE , AND ZF IS FEEDBACK IMPEDANCE AND CHARACTERIZED BY A SUMMING POINT ELECTRONICALLY OPERATIVE AT A JUNCTION OF SAID INPUT IMPEDANCE, SAID FEEDBACK IMPEDANCE AND SAID OPERATIONAL AMPLIFIER, SEQUENTIALLY OPERABLE CAPACITOR SWITCH MEANS FOR SEQUENTIALLY CONNECTING SAID PLURALITY OF CAPACITORS INTO THE POSITION OF SAID INPUT IMPEDANCE OF SAID FIRST OPERATIONAL AMPLIFIER, A PLURALITY OF CAPACITOR SWITCHES FOR RESPECTIVELY CONTROLLING THE FLOW OF SAID ELECTRICAL SIGNALS FROM SAID CAPACITORS TO SAID PHOTOCELLS, ONE OF CAPACITORS BEING A REFERENCE CAPACITOR, CONTROL CIRCUITRY RESPONSIVE TO SAID REFERENCE CAPACITOR WHEN THE CHARGE THEREAOCRSS REACHES A PREDETERMINED VALUE TO ACTUATE SAID CONTROL CIRCUITRY IN ORDER TO CAUSE SAID PLURALITY OF CAPACITOR SWITCHES TO PREVENT FURTHER APPLICATION OF SAID ELECTRICAL SIGNALS TO SAID CAPACITORS, A SECOND OPERATIONAL AMPLIFIER CHARACTERIZED BY THE FORMULA G=ZF/ZI, WHERE G IS GAIN, ZI IS INPUT IMPEDANCE, AND ZF IS FEEDBACK IMPEDANCE AND CHARACTERIZED BY A SUMMING POINT ELECTRICALLY OPERATIVE AT A JUNCTION OF SAID LAST-MENTIONED INPUT IMPEDANCE, SAID LASTMENTIONED FEEDBACK IMPEDANCE AND SAID LAST-MENTIONED OPERATIONAL AMPLIFIER, A PLURALITY OF FUNCTIONS GENERATING MATRIXES FOR OPERATIONALLY CONVERTING INPUT SIGNALS TO OUTPUT FORMS, SEQUENTIALLY OPERABLE MATRIX SWITCH MEANS FOR SEQUENTIALLY CONNECTING SAID PLURALITY OF FUNCTION GENERATING MATRIXES INTO THE POSITION OF SAID FEEDBACK IMPEDANCE OF SAID SECOND OPERATIONAL AMPLIFIER, SAID CONTROL CIRCUITRY ACTING WHEN SAID REFERENCE CAPACITOR REACHES SAID PREDETERMINED VALUE TO ELECTRICALLY CAUSE SAID CAPACITOR SWITCH MEANS AND SAID MATRIX SWITCH MEANS TO CONNECT SUCCESSIVE CAPACITORSA AND SUCCESSIVE MATRIXES RESPECTIVELY INTO SAID FEEDBACK POSITION OF SAID FIRSTA OPERATIONAL AMPLIFER AND SAID FEEDBACK POSITION OF SAID SECOND OPERATIONAL AMPLIFIER.