Patent US4657357A successfully refreshed from Google Patents.
US4657357A
Expired / Lapsed
US
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Illumination system for single objective lens binocular microscope
Assignee: Topcon Corp
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Filing: 1985-10-22
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Granted: 1987-04-14
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Expires: 2005-10-22
Abstract
Abstract An illumination system is provided for a single objective lens-type binocular microscope. The arrangement features a slot cut in a single objective lens. A prism is inserted into this slot. An illuminating light flux is conducted to the prism at an axis different from the axis of observation through the objective lens. The prism conducts this light to the axis of observation so as to illuminate the area to be observed. Thus, the angle between the illuminating light flux and observing light flux can be made extremely small permitting the deep illumination of the area to be observed.
Inventors
- 👤 Shinichi Nishimura
- 👤 Nobuaki Kitajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:40
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/06; G02B21/08; G02B21/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
108 words
An objective lens arrangement, comprising: an objective lens having a slotted portion; light flux deflection means disposed within a slot formed by said slotted portion, said deflection means having at least one reflection surface; means for providing an illuminating light flux at said reflection surface of said deflection means, the light flux passing through said deflection means and exiting at said deflection means via its reflection surface, the deflection means being so shaped and positioned that light flux exiting at the deflection means via its reflection surface illuminates a field of view along an axis of illumination that is approximately coaxial with a viewing axis of the lens.
Claim 2
Dependent Claim
108 words
An objective lens arrangement, comprising: an objective lens having a slotted portion; light flux deflection means disposed within a slot formed by said slotted portion, said deflection means having at least one reflection surface; means for providing an illuminating light flux at said reflection surface of said deflection means, the light flux passing through said deflection means and exiting at said deflection means via its reflection surface, the deflection means being so shaped and positioned that light flux exiting at the deflection means via its reflection surface illuminates a field of view along an axis of illumination that is approximately coaxial with a viewing axis of the lens.
Claim 3
Dependent Claim
24 words
A lens arrangement according to claim 1 wherein the slotted portion of the lens is constituted by a cut-out central portion of the lens.
Claim 4
Dependent Claim
32 words
A lens arrangement according to claim 1 wherein the slotted portion of the lens is constituted by a slot running from a peripheral portion of the lens to a central portion thereof.
Claim 5
Dependent Claim
16 words
A lens arrangement according to claim 1 wherein said objective lens comprises a single lens element.
Claim 6
Dependent Claim
17 words
A lens arrangement according to claim 1 wherein said objective lens comprises more than one lens element.
Claim 7
Dependent Claim
21 words
A lens arrangement according to claim 1 wherein said light flux deflection means comprises a prism movably mounted within said slot.
Claim 8
Dependent Claim
20 words
A lens arrangement according to claim 1 wherein said slot divides said lens into two separate and distinct lens portions.
Claim 9
Dependent Claim
32 words
A lens arrangement according to claim 1 wherein said light flux deflection means comprises a condenser lens for conducting and projecting the illuminating flux from said reflection surface of said deflection means.
Claim 10
Dependent Claim
24 words
A lens arrangement according to claim 8 wherein said condenser lens has a projection axis coincident with a central axis of said objective lens.
Claim 11
Dependent Claim
34 words
A lens arrangement according to claim 1 wherein said providing means comprises a light guide and a condenser lens for conducting illuminating light flux to said reflection surface of said light flux deflection means.
Claim 12
Dependent Claim
44 words
A lens arrangement according to claim 1 wherein said light flux deflection means is a prism including first and second reflection surfaces, and the illuminating light flux passes through said prism and is exited at said prism via said first and second reflection surfaces.
Claim 13
Dependent Claim
140 words
A single objective lens type binocular microscope comprising: an objective lens having a slotted portion; light flux deflection means disposed within a slot formed by said slotted portion, said deflection means having at least one reflection surface; means for providing an illuminating light flux at said reflection surface of said deflection means, the light flux passing through said deflection means and exiting at said deflection means via its reflection surface, said deflection means being so shaped and positioned that light flux exiting at said deflection means via its reflection surface illuminates a field of view along an axis of illumination that is approximately coaxial with a viewing axis of said objective lens; and a pair of observation lens systems, each of which has an ocular lens for observing an image of a field of view formed by said objective lens.
Claim 14
Dependent Claim
140 words
A single objective lens type binocular microscope comprising: an objective lens having a slotted portion; light flux deflection means disposed within a slot formed by said slotted portion, said deflection means having at least one reflection surface; means for providing an illuminating light flux at said reflection surface of said deflection means, the light flux passing through said deflection means and exiting at said deflection means via its reflection surface, said deflection means being so shaped and positioned that light flux exiting at said deflection means via its reflection surface illuminates a field of view along an axis of illumination that is approximately coaxial with a viewing axis of said objective lens; and a pair of observation lens systems, each of which has an ocular lens for observing an image of a field of view formed by said objective lens.
Claim 15
Dependent Claim
22 words
A single lens type binocular microscope according to claim 12 wherein each of said observation lens systems comprises a zoom lens system.
Claim 16
Dependent Claim
22 words
A single lens type binocular microscope according to claim 12 wherein said light flux deflection means is movably mounted in said slot.
Claim 17
Dependent Claim
25 words
A single lens type binocular microscope according to claim 12 wherein said slotted portion is constituted by a cut-out central portion of said objective lens.
Claim 18
Dependent Claim
35 words
A single lens type binocular microscope according to claim 12 wherein said slotted portion of the lens is constituted by a slot running from a peripheral portion of the lens to a central portion thereof.
Claim 19
Dependent Claim
22 words
A single lens type binocular microscope according to claim 12 wherein said slot divides said lens into two separate and distinct portions.
Claim 20
Dependent Claim
36 words
A single lens type binocular microscope according to claim 12 wherein said light flux deflection means comprises a condenser lens for conducting and projecting the illuminating light flux from said reflection surface of said deflection means.
Claim 21
Dependent Claim
46 words
A single lens type binocular microscope according to claim 12 wherein said light flux deflection means is a prism including first and second reflection surfacess, and the illuminating light flux passes through said prism and exits at said prism via said first and second reflection surfaces.
References Cited (Backward Citations)
DE973489C
Cited
US4361379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |