Mechanism to maintain constant body tube length of binocular mic

Details Mechanism to maintain constant body tube length of binocular mic Mechanism to maintain constant body tube length of binocular mic

1981-04-17

1983-07-12

Henry, Jon W.

350287, G02B 2120, G02B 2710

Patent

active

043927165

ABSTRACT:
The disclosed mechanism maintains a constant body tube length in a binocular microscope, by keeping a constant distance from a ray dividing prism secured to a casing of the microscope to each of oculars secured to ocular sleeves slidably mounted on said casing. Two outer frames are mounted on said casing in such a manner that they are movable laterally to axial direction of incident light ray to said ray dividing prism, and each of said ocular sleeves is movable in the corresponding one of said outer frames in the axial direction thereof. Each ocular sleeve has a pin, which pin fits in both an axial slot bored through the outer frame extending in said axial direction and a slant slot bored through said casing with an angle of 45.degree. relative to said axial direction. Whereby, when pupillarly distance is modified by laterally moving the outer frames, the ocular sleeves are axially displaced by corresponding distances.

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