US3910684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mirror-lens objective
Assignee: Carl Zeiss AG
•
Filing: 1974-09-16
•
Granted: 1975-10-07
•
Expires: 1994-09-16
Abstract
Abstract A mirror-lens system or objective, bounded at one end by a concave collecting mirror or reflective surface, concave toward the opposite end of the system; a rear lens member having at least one lens element located ahead or in front of the mirror; and a front lens member having at least two lens elements forming the front of the system and air spaced forwardly from the rear member. One of the elements of the front member is a negative lens designed to produce overcorrection of aberrations. Rules are developed which, if followed, will result in a system producing a very high grade image having reduced aberrations of higher order. Constructional data are given for several specific examples or embodiments of the invention.
Inventors
- 👤 Erhard Glatzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:07
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/008; G02B17/08
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
322 words
A multi-lens mirror-lens objective for forming an image on the same side of the objective as the object, at a finite imageforming scale, said objective comprising a collecting mirror (M) at one end of the objective and concave toward the opposite end of the objective, an inner lens member (H) in front of the mirror, and an outer lens member (A) spaced forwardly from the inner lens member, the light rays passing through said inner and outer lens members twice, once when passing inwardly toward said mirror and a second time when passing forwardly after reflection by said mirror, said mirror, inner lens member, and outer lens member being so formed and dimensioned that a. the inner lens member has a collecting action and the sign of the focal length of the inner lens member is positive; b. the quotient of the paraxial focal length (fH) of the inner lens member (H) divided by the paraxial focal length (fM) of the mirror (M) is within the range limits of + 0.420 and + 2.860, both of such focal lengths being calculated with respect to a single ray passage through the medium of air; c. the quotient of the paraxial refractive power ( Phi A) of the outer lens member (A) divided by the paraxial reflective power ( phi M) of the mirror (M) is within the range limits of + 0.479 and - 1.129, the power Phi A being calculated with respect to a single ray passage and the paraxial reflective power phi M being taken as the reciprocal of the paraxial focal length (fM) of the mirror; and d. the outer lens member (A) contains a negative component (N) which gives an over-correcting action, and the quotient of the negative focal length (fN) of the negative component (N) divided by the focal length (fM) of the mirror has a negative value within the range limits of - 0.137 and - 0.614.
Claim 2
Dependent Claim
322 words
A multi-lens mirror-lens objective for forming an image on the same side of the objective as the object, at a finite imageforming scale, said objective comprising a collecting mirror (M) at one end of the objective and concave toward the opposite end of the objective, an inner lens member (H) in front of the mirror, and an outer lens member (A) spaced forwardly from the inner lens member, the light rays passing through said inner and outer lens members twice, once when passing inwardly toward said mirror and a second time when passing forwardly after reflection by said mirror, said mirror, inner lens member, and outer lens member being so formed and dimensioned that a. the inner lens member has a collecting action and the sign of the focal length of the inner lens member is positive; b. the quotient of the paraxial focal length (fH) of the inner lens member (H) divided by the paraxial focal length (fM) of the mirror (M) is within the range limits of + 0.420 and + 2.860, both of such focal lengths being calculated with respect to a single ray passage through the medium of air; c. the quotient of the paraxial refractive power ( Phi A) of the outer lens member (A) divided by the paraxial reflective power ( phi M) of the mirror (M) is within the range limits of + 0.479 and - 1.129, the power Phi A being calculated with respect to a single ray passage and the paraxial reflective power phi M being taken as the reciprocal of the paraxial focal length (fM) of the mirror; and d. the outer lens member (A) contains a negative component (N) which gives an over-correcting action, and the quotient of the negative focal length (fN) of the negative component (N) divided by the focal length (fM) of the mirror has a negative value within the range limits of - 0.137 and - 0.614.
Claim 3
Dependent Claim
32 words
A mirror-lens objective as defined in claim 1, wherein the rearmost surface of said inner lens member (H) is concave toward the front and constitutes the supporting surface for the mirror (M).
Claim 4
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 5
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 6
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 7
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 8
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 9
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 10
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 11
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 12
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have thE respective meanings explained in the foregoing specification:
Claim 13
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 14
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 15
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals having the respective meanings explained in the foregoing specification:
Claim 16
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 17
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 18
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 19
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference leTters and numerals have the respective meanings explained in the foregoing specification:
Claim 20
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 21
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 22
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 23
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 24
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 25
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linear dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
Claim 26
Dependent Claim
60 words
A mirror-lens objective as defined in claim 1, whose dimensions and other characteristics are substantially as indicated in the following table, wherein all linEar dimensions are expressed in proportion to the equivalent focal length of the entire objective, which is considered as unity (F 1.0000), and the reference letters and numerals have the respective meanings explained in the foregoing specification:
References Cited (Backward Citations)
US2742817A
Cited
US3115537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |