US4704012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscopic microscope
Assignee: Canon Inc
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Filing: 1985-10-18
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Granted: 1987-11-03
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Expires: 2005-10-18
Abstract
Abstract A stereoscopic microscope has an objective opposed to an object to be examined, having its optic axis in a horizontal plane and projecting a parallel light beam, a pair of imaging optical systems for right and left eyes disposed rearwardly of the objective, a pair of optical devices having an even number of reflecting surfaces inclining the optic axes of the imaging optical systems so as to provide a predetermined angle of depression and a predetermined convergence angle, an erector rotatable about the optic axes inclined by the optical devices for the adjustment of the eye width, and a pair of eyepieces for enlarging and observing the image of the object to be examined therethrough.
Inventors
- 👤 Yoshimi Kohayakawa
- 👤 Takashi Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:28
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/13; A61B3/132; G; G02; G02B; G02B21/00; G02B21/18; G02B21/20; G02B21/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
A stereoscopic microscope provided with: an objective opposed to an object to be examined, having its optic axis in a horizontal plane and projecting a parallel light beam; a pair of imaging optical systems for right and left eyes disposed rearwardly of said objective; a pair of optical means having an even number of reflecting surfaces inclining the optic axes of said imaging optical systems so as to provide a predetermined angle of depression and a predetermined convergence angle; an erector rotatable about the optic axes inclined by said optical means for the adjustment of the eye width; and a pair of eyepieces for enlarging and observing the image of said object to be examined therethrough.
Claim 2
Dependent Claim
116 words
A stereoscopic microscope provided with: an objective opposed to an object to be examined, having its optic axis in a horizontal plane and projecting a parallel light beam; a pair of imaging optical systems for right and left eyes disposed rearwardly of said objective; a pair of optical means having an even number of reflecting surfaces inclining the optic axes of said imaging optical systems so as to provide a predetermined angle of depression and a predetermined convergence angle; an erector rotatable about the optic axes inclined by said optical means for the adjustment of the eye width; and a pair of eyepieces for enlarging and observing the image of said object to be examined therethrough.
Claim 3
Dependent Claim
13 words
A stereoscopic microscope according to claim 1, wherein said optical means are prisms.
Claim 4
Dependent Claim
17 words
A stereoscopic microscope according to claim 1, wherein said optical means are an even number of mirrors.
Claim 5
Dependent Claim
15 words
A stereoscopic microscope according to claim 1, wherein said erector is an erecting optical system.
Claim 6
Dependent Claim
20 words
A stereoscopic microscope according to claim 4, wherein said erect prism is a porro prism comprising rectangular prisms combined together.
Claim 7
Dependent Claim
21 words
A stereoscopic microscope according to claim 1, further provided with an illuminating optical system for illuminating the object to be examined.
Claim 8
Dependent Claim
19 words
A stereoscopic microscope according to claim 6, wherein the illuminated area of the object to be examined is slit-like.
Claim 9
Dependent Claim
22 words
A stereoscopic microscope according to claim 6, wherein said illuminating optical system is provided with a light dividing member near said objective.
Claim 10
Dependent Claim
27 words
A stereoscopic microscope according to claim 1, wherein said optical means adjust the angle of depression and the convergence angle to the imaging point of said objective.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |