US3924926A — Polarizing attachment for microscopes having incl…

Claim 1

Independent Claim 216 words

In a microscope having an objective system with an exit pupil and a chosen effective focal length, an inclined binocular eyepiece having a focal plane therein, each of these elements being aligned along an observation axis, and a beam deflector alternately positionable on and off of said observation axis between said objective system and said eyepiece, the improvement comprising an alternate observation axis such that said objective system provides an intermediate object image plane on said alternate observation axis when said beam deflector is positioned off said observation axis, said intermediate object image plane being located at a distance from said objective system substantially equal optically to said effective focal length, said intermediate object image plane and said eyepiece focal plane being optically-spaced equidistant from said objective system, an optical modifying element positIoned at said intermediate object image plane, a plurality of deflectors positioned on said alternate observation axis subsequent to said intermediate object image plane to direct said alternate observation axis from said intermediate object image plane toward said eyepiece, and a lens system aligned along said alternate observation axis after said intermediate object image planes to re-image said object in the eyepiece focal plane whereby polarized light from the objective system reaches said optical modifying element without being influenced by said plurality of deflectors.

Claim 2

Dependent Claim 216 words

In a microscope having an objective system with an exit pupil and a chosen effective focal length, an inclined binocular eyepiece having a focal plane therein, each of these elements being aligned along an observation axis, and a beam deflector alternately positionable on and off of said observation axis between said objective system and said eyepiece, the improvement comprising an alternate observation axis such that said objective system provides an intermediate object image plane on said alternate observation axis when said beam deflector is positioned off said observation axis, said intermediate object image plane being located at a distance from said objective system substantially equal optically to said effective focal length, said intermediate object image plane and said eyepiece focal plane being optically-spaced equidistant from said objective system, an optical modifying element positIoned at said intermediate object image plane, a plurality of deflectors positioned on said alternate observation axis subsequent to said intermediate object image plane to direct said alternate observation axis from said intermediate object image plane toward said eyepiece, and a lens system aligned along said alternate observation axis after said intermediate object image planes to re-image said object in the eyepiece focal plane whereby polarized light from the objective system reaches said optical modifying element without being influenced by said plurality of deflectors.

Claim 3

Dependent Claim 19 words

The improvement of claim 1 wherein said objective system includes a telescope objective providing said chosen effective focal length.

Claim 4

Dependent Claim 49 words

The improvement of claim 2 wherein said lens system has a plurality of lenses each having a focal length substantially equal to said effective focal length and each being located at a regular interval along said alternate observation axis, said regular interval being substantially twice said effective focal length.

Claim 5

Dependent Claim 26 words

The improvement of claim 3 wherein the first of said plurality of lenses is spaced from said telescope objective by substantially twice said effective focal length.

Claim 6

Dependent Claim 18 words

The improvement of claim 4 wherein each of said plurality of lenses and said telescope objective are identical.

Claim 7

Dependent Claim 12 words

The improvement of claim 4 wherein the effective focal length is 183mm.

Claim 8

Dependent Claim 48 words

The improvement of claim 4 wherein the first of said plurality of deflectors is located on said alternate observation axis more than a distance of two effective focal lengths from said intermediate image plane to provide an intermediate objective exit pupil plane prior to a beam deflecting element.

Claim 9

Dependent Claim 52 words

The improvement of claim 7 wherein there are four lenses in said plurality of lenses, said effective focal length is about 183mm, the first of said four lenses being spaced from said telescope objective about 366mm and the last of said four lenses being spaced from said eyepiece focal plane about 183mm.

Claim 10

Dependent Claim 39 words

The improvement of claim 3 having at least one additional pair of lenses, each lens of said pair being aligned along said alternate observation axis at said regular intervals to provide a like number of additional intermediate image planes.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-12-08	1979-06-09	1979-12-09	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-12-08	1983-06-09	1983-12-09	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-12-08	1987-06-09	1987-12-09	$7700.00	Window Closed / Lapsed

Polarizing attachment for microscopes having inclined binocular eyepiece

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