Patent ID: 6628458
Filing Date: 2003-09-30
Classification: G02B

Abstract:
A microscope comprising:an optical tube for magnifying an image of a specimen to be viewed, said optical tube having an optical tube optical axis along which said optical tube is selectively moveable to alter said image; and an optical tube sleeve in which said optical tube is rotatably and slideably retained; wherein the optical tube sleeve includes an upper sloping surface and said optical tube includes a radial projection for overlying and engaging said sloping surface whereby rotation imparted to the optical tube causes said optical tube to move axially along said optical tube optical axis through the cooperation of the sloping surface with the radial projection to make a fine focus adjustment, and wherein said optical tube sleeve only Partially encircles the optical tube and includes spaced-apart side edges defining a generally vertically oriented channel in said optical tube sleeve, said radial projection being dimensioned to slide within said channel along said optical tube optical axis when aligned therewith, whereby a gross focus adjustment can be made.