Abstract An arrangement for attaching a motion picture camera to a microscope used in a surgical operation, to enable automatic control of the diaphragm aperture of the camera as the operation proceeds. The microscope is provided with a beam splitter which directs part of the light laterally into an adapter which contains an iris diaphragm adjusted by a motor. The adapter also has a reflecting unit for reflecting the light upwardly toward a motion picture camera mounted on the adapter in a position laterally of the microscope axis. In the camera is a light responsive cell which measures the light reaching the camera and which, through a cable connection to an amplifier, controls the motor to adjust the aperture of the diaphragm in the adapter to make it larger or smaller, as required. The amplifier and the motor are preferably in a unit separate from the adapter itself.
A device for automatic control of exposure of film in a motion picture camera of the type having photometric means therein when such camera is used to photograph objects seen through an operation microscope, said device comprising, in combination: a. a connecting unit attached to said microscope and to said camera for holding said camera in fixed position relative to and spaced from said microscope; b. an adjustable iris diaphragm mounted in said connecting unit for controlling the amount of light entering said camera from said microscope; c. motor means for adjusting said diaphragm; and d. electrical control means operatively connecting said photometric means in the camera to said motor means for controlling the aperture of said iris diaphragm from said photometric means.
Claim 2
Independent Claim
123 words
A device for automatic control of exposure of film in a motion picture camera of the type having photometric means therein when such camera is used to photograph objects seen through an operation microscope, said device comprising, in combination: a. a connecting unit attached to said microscope and to said camera for holding said camera in fixed position relative to and spaced from said microscope; b. an adjustable iris diaphragm mounted in said connecting unit for controlling the amount of light entering said camera from said microscope; c. motor means for adjusting said diaphragm; and d. electrical control means operatively connecting said photometric means in the camera to said motor means for controlling the aperture of said iris diaphragm from said photometric means.
Claim 3
Dependent Claim
22 words
Mechanism as defined in claim 1, wherein said motor means is contained in a housing separate from and attachable to said unit.
Claim 4
Dependent Claim
39 words
Mechanism as defined in claim 1, wherein said control means includes an exposure control and amplifying system, and wherein said motor means and said exposure control and amplifying system are mounted together in a housing separate from said unit.
Claim 5
Dependent Claim
25 words
Mechanism as defined in claim 1, wherein said motor means is operatively connected to said iris diaphragm through a gear transmission and a driving bushing.
Claim 6
Dependent Claim
32 words
Mechanism as defined in claim 1, wherein said camera includes a speed regulator, and wherein said control means is operatively connected to said speed regulator as well as to said photometric means.