Slit or spot lamp stereomicroscope

Claim 2

A projection lamp microscope for casting an image having a variable incidence onto an object to be examined, comprising a projection lamp, a stereomicroscope for observing said image with a variable magnification, means mounting said lamp and said stereomicroscope for pivotal motion about a common vertical axis, said lamp having an optical system, the end portion of the optical system including two reflectors, said reflectors imparting a double-bent path to an optical beam casting the variable incidence image, the final portion of said bent optical beam issuing from the reflector positioned last with respect to said beam path cooperating with the antepenultimate portion of said optical beam entering the other reflector positioned first with respect to said path, so as to determine the point upon which the cast image of the optical beam is formed, and means mounting a portion of the optical system including at least said two reflectors for pivotal motion about the axis of said antepenultimate portion of the optical beam.

Claim 3

A stereomicroscope as claimed in claim 1, comprising a bent tube carrying the two reflectors, said bent tube having a first limb through which the optical beam casting the image initially passes, and a second limb connected to said first limb a frame for said lamp, said limbs being housed in the upper part of the lamp frame so as to be pivotable about its longitudinal axis, said first limb further being oriented in a manner such that its said axis merges into the light beam portion emitted by the lamp, the first reflector being carried on the bent portion of the tube being positioned so that the penultimate beam portion reflected by said first reflector merges into the axis of the second limb of the bent tube, said second limb carrying at its free end a projection lens and the second reflector, said second reflector being positioned at an angle relative to said penultimate beam portion whereby the last beam portion reflected by said second reflector cooperates with the extension of the antepenultimate portion of the optical beam defining the extension of the axis of rotation of the bent tube, so as to determine the point where the cast image is formed and the location of the object being examined.

Claim 4

A stereomicroscope as claimed in claim 1, wherein said microscope is of the kind used for eye testing, a rotatable drum connected to said stereomicroscope, of said drum including lens means mounted thereon for varying the magnifying power of the stereomicroscope, said drum having a horizontal axis transverse to the optical axes of the stereomicroscope, a pair of stationary lenses on said stereomicroscope optically associated with said lenses on the drum, said stationary lenses being disposed inside the rotary drum, and additional optical elements in said drum for varying magnifying power of the stationary lenses.

Claim 5

A stereomicroscope as claimed in claim 3, said stereomicroscope comprising a pair of half-microscopes, said lenses of the optical system for each half-microscope being mounted for rotation symmetrically about the optical axes of said half-microscopes.