US4232933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system of colposcope
Assignee: Olympus Corp
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Filing: 1979-01-12
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Granted: 1980-11-11
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Expires: 1999-01-12
Abstract
Abstract An optical system of colposcope comprises a pair of independent observation optical sub-systems each having a family of objective lenses including a magnification varying optical sub-system, the magnification varying sub-system in one observation sub-system being ganged with the magnification varying sub-system in the other observation sub-system. The optical system also comprises a photographing optical sub-system having a family of objective lenses including a magnification varying optical sub-system which is ganged with the magnification varying sub-systems of the observation sub-systems, and an illumination optical sub-system for illuminating an object being examined. The observation, the photographing and the illumination sub-system are disposed so that their optical axes converge on the object being examined.
Inventors
- 👤 Kenichi Nakahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:28
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/303; A61B1/04; G; G02; G02B; G02B23/00; G02B23/24; G02B23/2407; G02B23/2423; G02B23/243; G02B23/2438; A61B1/06; A61B1/0623
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
106 words
An optical system of colposcope comprising a pair of laterally spaced, independent observation optical sub-systems each having a family of objective lenses including a magnification varying optical sub-system, the magnification varing sub-system in one observation sub-system being ganged with the magnification varying sub-system in the other observation sub-system, a photographing optical sub-system having a family of objective lenses including a magnification varying optical sub-system which is ganged with the magnification varying sub-systems of the observation sub-systems, and an illumination optical sub-system for illuminating an object being examined, the optical axes of the four optical sub-systems being disposed so that they converge on the object being examined.
Claim 2
Dependent Claim
106 words
An optical system of colposcope comprising a pair of laterally spaced, independent observation optical sub-systems each having a family of objective lenses including a magnification varying optical sub-system, the magnification varing sub-system in one observation sub-system being ganged with the magnification varying sub-system in the other observation sub-system, a photographing optical sub-system having a family of objective lenses including a magnification varying optical sub-system which is ganged with the magnification varying sub-systems of the observation sub-systems, and an illumination optical sub-system for illuminating an object being examined, the optical axes of the four optical sub-systems being disposed so that they converge on the object being examined.
Claim 3
Dependent Claim
36 words
An optical system according to claim 1 in which the family of objective lenses in the observation sub-systems has a magnification which is equal to that of the family of objective lenses in the photographing sub-system.
Claim 4
Dependent Claim
69 words
An optical system according to claim 2 in which each of the observation sub-systems comprises the family of objective lenses including the magnification varying optical sub-system, an optical path diverting prism, a Porro prism for converting an inverted image into an erect image, and an eyepiece, the pair of observation sub-systems being symmetrically disposed on the opposite lateral sides of the axes of the illumination and the photographing sub-system.
Claim 5
Dependent Claim
38 words
An optical system according to claim 2 in which the photographing sub-system comprises the family of objective lenses including the magnification varying optical sub-system, a pair of optical path diverting, first and second prisms, and a focussing lens.
Claim 6
Dependent Claim
19 words
An optical system according to claim 4 in which the first and second prisms each comprise a reflecting mirror.
Claim 7
Dependent Claim
33 words
An optical system according to claim 4 in which the photographing sub-system includes a movable reflecting mirror which selectively switches the taking path between an auxiliary observation path and a film exposure path.
Claim 8
Dependent Claim
24 words
An optical system of colposcope of claim 1 wherein the angle formed between the optical axes of the observation sub-systems is less than 12°.
Claim 9
Dependent Claim
32 words
The optical system of colposcope of claim 7 wherein the optical axes of the observation sub-systems is at an angle less than 6° to the optical axis of the photographing optical sub-system.
Claim 10
Dependent Claim
36 words
The optical system of colposcope of claims 1, 7 or 8 wherein the optical axis of said illumination optical sub-system is at an angle of less than 6° to the optical axes of said observation sub-systems.
Claim 11
Dependent Claim
38 words
The optical system of colposcope of claim 1 wherein the magnification varying sub-systems of said observation sub-systems and the magnification varying optical sub-system of said photographing optical sub-system each have a magnification equal to or less than unity.
Claim 12
Dependent Claim
25 words
The optical system of colposcope of claim 10 wherein the overall magnification of each of said observation sub-systems and said photographing optical sub-system are equal.
Claim 13
Dependent Claim
36 words
The optical system of colposcope of claim 11 wherein the family of objective lenses of said observation optical sub-systems and said photographing optical sub-system have a magnification greater than the magnification of said magnification varying sub-systems.
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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |