Tiselius type electrophoresis apparatus with teleobjectives

Claim 1

A TISELIUS TYPE ELECTROPHORESIS APPARATUS, COMPRISING A SOURCE OF LIGHT, A CONDENSER LENS RECEIVING LIGHT FROM SAID SOURCE OF LIGHT, A FIRST ROTATABLE DISC HAVING DIFFUSING MEANS THEREIN AT THE FOCAL POINT OF SAID CONDENSER LENS, A FIRST COLLIMATOR LENS POSITIONED FOR RECEIVING LIGHT FROM SAID FIRST ROTATABLE DISC AND FOR COLLIMATING THE LIGHT, A THERMOSTATICALLY CONTROLLED CHAMBER THROUGH WHICH SAID COLLIMATED LIGHT PASSES, A SECOND MIRROR REFLECTING COLLIMATOR LENS POSITIONED TO RECEIVE LIGHT FROM SAID CHAMBER, A SECOND ROTATABLE DISC HAVING DIFFUSING MEANS THEREON POSITIONED TO RECEIVE LIGHT FROM SAID SECOND COLLIMATOR LENS, AN OBJECTIVE, A CYLINDRICAL LENS SYSTEM AND A LIGHT RECEIVING SURFACE ON WHICH THE LIGHT CAN SHINE, THE OBJECTIVE AND CYLINDRICAL LENS SYSTEM BEING POSITIONED BETWEEN SAID SECOND ROTATABLE DISC AND SAID SURFACE, EACH SAID COLLIMATOR LENS CONSISTING OF A TELEOBJECTIVE OF A DIAMETER OF AT MOST 10 MM., AND HAVING SPHERICAL AND CHROMATIC ABERRATIONS LESS THAN 1/1000 OF THE FOCAL LENGTH AND A DISTORTION OF MOST 0.3% FOR A 3* ANGLE; EACH TELEOBJECTIVE CONSISTING OF A POSITIVE MEMBER CONSTITUTED BY TWO BICONVEX LENSES WITH A BICONCAVE LENS BETWEEN THEM, ALL THREE LENSES BEING AIR SPACED, AND OF A NEGATIVE MEMBER CONSTITUTED BY A BICONCAVE LENS AND A BICONVEX LENS.