US3790254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope condenser series
Assignee: American Optical Corp
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Filing: 1972-09-07
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Granted: 1974-02-05
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Expires: 1992-09-07
Abstract
Abstract A related series of interchangeable phase condensers of substantially the same focal length having compatible parfocality, but having different working distances. The series of condensers being of such a design that ordinary correction of the image plane is within at least two wave lengths of light; the condensers being well corrected for field aberration including coma, and pupil aberration including coma; said condensers having their respective pupil positions substantially external to the glass thereof. By ''''substantially external'''' is meant all of the condensers have their annulii, aperture stops and focal plane positions substantially coincident.
Inventors
- 👤 E Rybicki
- 👤 M Sussman
- 👤 R Tackaberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:36
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/06; G02B21/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A related series of interchangeable phase condensers of substantially the same focal length having compatible parfocality, but having different working distances, the series of condensers being of such a design that ordinary correction of the image plane is within at least two wave lengths of light; the condensers being well corrected for field abErration including coma, and pupil aberration including coma; said condensers having their respective pupil positions external to the glass thereof in a light path through a given condenser in the series and each condenser comprising at least three lens components, the last of said lens components being a double convex triplet and the second of said lens components being a meniscus positive lens.
Claim 2
Dependent Claim
116 words
A related series of interchangeable phase condensers of substantially the same focal length having compatible parfocality, but having different working distances, the series of condensers being of such a design that ordinary correction of the image plane is within at least two wave lengths of light; the condensers being well corrected for field abErration including coma, and pupil aberration including coma; said condensers having their respective pupil positions external to the glass thereof in a light path through a given condenser in the series and each condenser comprising at least three lens components, the last of said lens components being a double convex triplet and the second of said lens components being a meniscus positive lens.
Claim 3
Dependent Claim
62 words
A microscope condenser in a series according to claim 1 having a numerical aperture of 1.30 and composed of the following components: a first component I comprised of a doublet composed of a plane parallel plate cemented to a hemispherical lens; a second component II comprised of a meniscus positive lens; and a third component III, composed of a convex positive triplet.
Claim 4
Dependent Claim
120 words
The microscope condenser of claim 2 in which the parameters of lens radii (R), thicknesses (T), and spacings (S) are expressed in millimeters and a negative sign indicates lens radii on centers of curvature on the object side of the lens TABLE II Radius Thickness Space Refractive Abbe R T S Index Number ND Nu S1 0.1218F R1 4.3652F T1 0.7586F ND1 1.696800 Nu 1 55.41 R2 2.2949F T2 0.1550F ND2 1.805182 Nu 2 25.43 R3 11.948F T3 0.2770F ND3 1.696800 Nu 3 55.41 R4 12.679F S2 0.01137F R5 1.5317F T4 0.4331F ND4 1.696800 Nu 4 55.41 R6 3.0139F S3 0.03101F R7 0.75399FT5 0.8940F ND5 1.617650 Nu 5 44.14 R8 PLANO T6 0.1550F ND6 1.784701 Nu 6 26.08 R9 PLANO
Claim 5
Dependent Claim
10 words
The microscope condenser of claim 3 in which F 9.67521.
Claim 6
Dependent Claim
61 words
A microscope condenser in a series according to claim 1 having a working distance of substantially 5.5 millimeters in air, and a numerical aperture of substantially 0.65 and composed of the following components: a first, second, and third component I, II, and III, each comprised of a meniscus positive lens, and a fourth component IV, comprised of a convex negative triplet.
Claim 7
Dependent Claim
125 words
The microscope condenser of claim 5 in which the parameters of lens radii (R), thicknesses (T) and spacings (S) are expressed in millimeters and a negative sign indicates lens radii on centers of curvature on the object side of the lens TABLE IV Radius Thickness Space Refractive Abbe R T S Index Number ND Nu S1 -0.01333 R1 10.336F T1 0.1550 ND1 1.96051 Nu 1 34.90 R2 1.0336F T2 0.6873 ND2 1.60310 Nu 2 65.34 R3 -1.1797F T3 0.1550 ND3 1.96051 Nu 3 34.90 R4 -4.1166F S2 0.005167 R5 -32.798F T4 0.4847 ND4 1.69680 Nu 4 55.39 R6 -1.9954F S3 0.005167 R7 1.5817F T5 0.6718 ND5 1.69680 Nu 5 55.39 R8 2.8103F S4 0.005167 R9 0.9984F T6 0.5400 ND6 1.69680 Nu 6 55.39 R10 5.1678F
Claim 8
Dependent Claim
10 words
The microscope condenser of claim 6 in which F 9.67528.
Claim 9
Dependent Claim
47 words
A microscope condenser in a series according to claim 1 having a numerical aperture of 0.90 and composed of the following components: a first and second component I, and II, comprised of a meniscus positive lens, and a third component III comprised of a convex positive triplet.
Claim 10
Dependent Claim
112 words
The microscope condenser of claim 8 in which the parameters of lens radii (R), thicknessEs (T), and spacings (S) are expressed in millimeters and a negative sign indicates lens radii on centers of curvature on the object side of the lens TABLE VI Radius Thickness Space Refractive Abbe R T S Index Number ND Nu S1 0.1344F R1 4.1119F T1 0.8723F ND1 1.69680 Nu 1 55.39 R2 -1.1189F T2 0.2584F ND2 1.80518 Nu 2 25.43 R3 -2.9907F T3 0.1654F ND3 1.69680 Nu 3 55.39 R4 -10.222F S 0.01137F R5 1.1413F T4 0.5840F ND4 1.69680 Nu 4 55.39 R6 2.8435F S3 0.0310F R7 0.77569F T5 0.7764F ND5 1.56384 Nu 5 60.32 R8 5.1726F
Claim 11
Dependent Claim
10 words
The microscope condenser of claim 9 in which F 9.67529.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |